1 /* 2 * linux/drivers/video/omap2/dss/dsi.c 3 * 4 * Copyright (C) 2009 Nokia Corporation 5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License version 2 as published by 9 * the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14 * more details. 15 * 16 * You should have received a copy of the GNU General Public License along with 17 * this program. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #define DSS_SUBSYS_NAME "DSI" 21 22 #include <linux/kernel.h> 23 #include <linux/io.h> 24 #include <linux/clk.h> 25 #include <linux/device.h> 26 #include <linux/err.h> 27 #include <linux/interrupt.h> 28 #include <linux/delay.h> 29 #include <linux/mutex.h> 30 #include <linux/module.h> 31 #include <linux/semaphore.h> 32 #include <linux/seq_file.h> 33 #include <linux/platform_device.h> 34 #include <linux/regulator/consumer.h> 35 #include <linux/wait.h> 36 #include <linux/workqueue.h> 37 #include <linux/sched.h> 38 #include <linux/slab.h> 39 #include <linux/debugfs.h> 40 #include <linux/pm_runtime.h> 41 #include <linux/of.h> 42 #include <linux/of_platform.h> 43 #include <linux/component.h> 44 45 #include <video/omapfb_dss.h> 46 #include <video/mipi_display.h> 47 48 #include "dss.h" 49 #include "dss_features.h" 50 51 #define DSI_CATCH_MISSING_TE 52 53 struct dsi_reg { u16 module; u16 idx; }; 54 55 #define DSI_REG(mod, idx) ((const struct dsi_reg) { mod, idx }) 56 57 /* DSI Protocol Engine */ 58 59 #define DSI_PROTO 0 60 #define DSI_PROTO_SZ 0x200 61 62 #define DSI_REVISION DSI_REG(DSI_PROTO, 0x0000) 63 #define DSI_SYSCONFIG DSI_REG(DSI_PROTO, 0x0010) 64 #define DSI_SYSSTATUS DSI_REG(DSI_PROTO, 0x0014) 65 #define DSI_IRQSTATUS DSI_REG(DSI_PROTO, 0x0018) 66 #define DSI_IRQENABLE DSI_REG(DSI_PROTO, 0x001C) 67 #define DSI_CTRL DSI_REG(DSI_PROTO, 0x0040) 68 #define DSI_GNQ DSI_REG(DSI_PROTO, 0x0044) 69 #define DSI_COMPLEXIO_CFG1 DSI_REG(DSI_PROTO, 0x0048) 70 #define DSI_COMPLEXIO_IRQ_STATUS DSI_REG(DSI_PROTO, 0x004C) 71 #define DSI_COMPLEXIO_IRQ_ENABLE DSI_REG(DSI_PROTO, 0x0050) 72 #define DSI_CLK_CTRL DSI_REG(DSI_PROTO, 0x0054) 73 #define DSI_TIMING1 DSI_REG(DSI_PROTO, 0x0058) 74 #define DSI_TIMING2 DSI_REG(DSI_PROTO, 0x005C) 75 #define DSI_VM_TIMING1 DSI_REG(DSI_PROTO, 0x0060) 76 #define DSI_VM_TIMING2 DSI_REG(DSI_PROTO, 0x0064) 77 #define DSI_VM_TIMING3 DSI_REG(DSI_PROTO, 0x0068) 78 #define DSI_CLK_TIMING DSI_REG(DSI_PROTO, 0x006C) 79 #define DSI_TX_FIFO_VC_SIZE DSI_REG(DSI_PROTO, 0x0070) 80 #define DSI_RX_FIFO_VC_SIZE DSI_REG(DSI_PROTO, 0x0074) 81 #define DSI_COMPLEXIO_CFG2 DSI_REG(DSI_PROTO, 0x0078) 82 #define DSI_RX_FIFO_VC_FULLNESS DSI_REG(DSI_PROTO, 0x007C) 83 #define DSI_VM_TIMING4 DSI_REG(DSI_PROTO, 0x0080) 84 #define DSI_TX_FIFO_VC_EMPTINESS DSI_REG(DSI_PROTO, 0x0084) 85 #define DSI_VM_TIMING5 DSI_REG(DSI_PROTO, 0x0088) 86 #define DSI_VM_TIMING6 DSI_REG(DSI_PROTO, 0x008C) 87 #define DSI_VM_TIMING7 DSI_REG(DSI_PROTO, 0x0090) 88 #define DSI_STOPCLK_TIMING DSI_REG(DSI_PROTO, 0x0094) 89 #define DSI_VC_CTRL(n) DSI_REG(DSI_PROTO, 0x0100 + (n * 0x20)) 90 #define DSI_VC_TE(n) DSI_REG(DSI_PROTO, 0x0104 + (n * 0x20)) 91 #define DSI_VC_LONG_PACKET_HEADER(n) DSI_REG(DSI_PROTO, 0x0108 + (n * 0x20)) 92 #define DSI_VC_LONG_PACKET_PAYLOAD(n) DSI_REG(DSI_PROTO, 0x010C + (n * 0x20)) 93 #define DSI_VC_SHORT_PACKET_HEADER(n) DSI_REG(DSI_PROTO, 0x0110 + (n * 0x20)) 94 #define DSI_VC_IRQSTATUS(n) DSI_REG(DSI_PROTO, 0x0118 + (n * 0x20)) 95 #define DSI_VC_IRQENABLE(n) DSI_REG(DSI_PROTO, 0x011C + (n * 0x20)) 96 97 /* DSIPHY_SCP */ 98 99 #define DSI_PHY 1 100 #define DSI_PHY_OFFSET 0x200 101 #define DSI_PHY_SZ 0x40 102 103 #define DSI_DSIPHY_CFG0 DSI_REG(DSI_PHY, 0x0000) 104 #define DSI_DSIPHY_CFG1 DSI_REG(DSI_PHY, 0x0004) 105 #define DSI_DSIPHY_CFG2 DSI_REG(DSI_PHY, 0x0008) 106 #define DSI_DSIPHY_CFG5 DSI_REG(DSI_PHY, 0x0014) 107 #define DSI_DSIPHY_CFG10 DSI_REG(DSI_PHY, 0x0028) 108 109 /* DSI_PLL_CTRL_SCP */ 110 111 #define DSI_PLL 2 112 #define DSI_PLL_OFFSET 0x300 113 #define DSI_PLL_SZ 0x20 114 115 #define DSI_PLL_CONTROL DSI_REG(DSI_PLL, 0x0000) 116 #define DSI_PLL_STATUS DSI_REG(DSI_PLL, 0x0004) 117 #define DSI_PLL_GO DSI_REG(DSI_PLL, 0x0008) 118 #define DSI_PLL_CONFIGURATION1 DSI_REG(DSI_PLL, 0x000C) 119 #define DSI_PLL_CONFIGURATION2 DSI_REG(DSI_PLL, 0x0010) 120 121 #define REG_GET(dsidev, idx, start, end) \ 122 FLD_GET(dsi_read_reg(dsidev, idx), start, end) 123 124 #define REG_FLD_MOD(dsidev, idx, val, start, end) \ 125 dsi_write_reg(dsidev, idx, FLD_MOD(dsi_read_reg(dsidev, idx), val, start, end)) 126 127 /* Global interrupts */ 128 #define DSI_IRQ_VC0 (1 << 0) 129 #define DSI_IRQ_VC1 (1 << 1) 130 #define DSI_IRQ_VC2 (1 << 2) 131 #define DSI_IRQ_VC3 (1 << 3) 132 #define DSI_IRQ_WAKEUP (1 << 4) 133 #define DSI_IRQ_RESYNC (1 << 5) 134 #define DSI_IRQ_PLL_LOCK (1 << 7) 135 #define DSI_IRQ_PLL_UNLOCK (1 << 8) 136 #define DSI_IRQ_PLL_RECALL (1 << 9) 137 #define DSI_IRQ_COMPLEXIO_ERR (1 << 10) 138 #define DSI_IRQ_HS_TX_TIMEOUT (1 << 14) 139 #define DSI_IRQ_LP_RX_TIMEOUT (1 << 15) 140 #define DSI_IRQ_TE_TRIGGER (1 << 16) 141 #define DSI_IRQ_ACK_TRIGGER (1 << 17) 142 #define DSI_IRQ_SYNC_LOST (1 << 18) 143 #define DSI_IRQ_LDO_POWER_GOOD (1 << 19) 144 #define DSI_IRQ_TA_TIMEOUT (1 << 20) 145 #define DSI_IRQ_ERROR_MASK \ 146 (DSI_IRQ_HS_TX_TIMEOUT | DSI_IRQ_LP_RX_TIMEOUT | DSI_IRQ_SYNC_LOST | \ 147 DSI_IRQ_TA_TIMEOUT) 148 #define DSI_IRQ_CHANNEL_MASK 0xf 149 150 /* Virtual channel interrupts */ 151 #define DSI_VC_IRQ_CS (1 << 0) 152 #define DSI_VC_IRQ_ECC_CORR (1 << 1) 153 #define DSI_VC_IRQ_PACKET_SENT (1 << 2) 154 #define DSI_VC_IRQ_FIFO_TX_OVF (1 << 3) 155 #define DSI_VC_IRQ_FIFO_RX_OVF (1 << 4) 156 #define DSI_VC_IRQ_BTA (1 << 5) 157 #define DSI_VC_IRQ_ECC_NO_CORR (1 << 6) 158 #define DSI_VC_IRQ_FIFO_TX_UDF (1 << 7) 159 #define DSI_VC_IRQ_PP_BUSY_CHANGE (1 << 8) 160 #define DSI_VC_IRQ_ERROR_MASK \ 161 (DSI_VC_IRQ_CS | DSI_VC_IRQ_ECC_CORR | DSI_VC_IRQ_FIFO_TX_OVF | \ 162 DSI_VC_IRQ_FIFO_RX_OVF | DSI_VC_IRQ_ECC_NO_CORR | \ 163 DSI_VC_IRQ_FIFO_TX_UDF) 164 165 /* ComplexIO interrupts */ 166 #define DSI_CIO_IRQ_ERRSYNCESC1 (1 << 0) 167 #define DSI_CIO_IRQ_ERRSYNCESC2 (1 << 1) 168 #define DSI_CIO_IRQ_ERRSYNCESC3 (1 << 2) 169 #define DSI_CIO_IRQ_ERRSYNCESC4 (1 << 3) 170 #define DSI_CIO_IRQ_ERRSYNCESC5 (1 << 4) 171 #define DSI_CIO_IRQ_ERRESC1 (1 << 5) 172 #define DSI_CIO_IRQ_ERRESC2 (1 << 6) 173 #define DSI_CIO_IRQ_ERRESC3 (1 << 7) 174 #define DSI_CIO_IRQ_ERRESC4 (1 << 8) 175 #define DSI_CIO_IRQ_ERRESC5 (1 << 9) 176 #define DSI_CIO_IRQ_ERRCONTROL1 (1 << 10) 177 #define DSI_CIO_IRQ_ERRCONTROL2 (1 << 11) 178 #define DSI_CIO_IRQ_ERRCONTROL3 (1 << 12) 179 #define DSI_CIO_IRQ_ERRCONTROL4 (1 << 13) 180 #define DSI_CIO_IRQ_ERRCONTROL5 (1 << 14) 181 #define DSI_CIO_IRQ_STATEULPS1 (1 << 15) 182 #define DSI_CIO_IRQ_STATEULPS2 (1 << 16) 183 #define DSI_CIO_IRQ_STATEULPS3 (1 << 17) 184 #define DSI_CIO_IRQ_STATEULPS4 (1 << 18) 185 #define DSI_CIO_IRQ_STATEULPS5 (1 << 19) 186 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_1 (1 << 20) 187 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_1 (1 << 21) 188 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_2 (1 << 22) 189 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_2 (1 << 23) 190 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_3 (1 << 24) 191 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_3 (1 << 25) 192 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_4 (1 << 26) 193 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_4 (1 << 27) 194 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_5 (1 << 28) 195 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_5 (1 << 29) 196 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL0 (1 << 30) 197 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL1 (1 << 31) 198 #define DSI_CIO_IRQ_ERROR_MASK \ 199 (DSI_CIO_IRQ_ERRSYNCESC1 | DSI_CIO_IRQ_ERRSYNCESC2 | \ 200 DSI_CIO_IRQ_ERRSYNCESC3 | DSI_CIO_IRQ_ERRSYNCESC4 | \ 201 DSI_CIO_IRQ_ERRSYNCESC5 | \ 202 DSI_CIO_IRQ_ERRESC1 | DSI_CIO_IRQ_ERRESC2 | \ 203 DSI_CIO_IRQ_ERRESC3 | DSI_CIO_IRQ_ERRESC4 | \ 204 DSI_CIO_IRQ_ERRESC5 | \ 205 DSI_CIO_IRQ_ERRCONTROL1 | DSI_CIO_IRQ_ERRCONTROL2 | \ 206 DSI_CIO_IRQ_ERRCONTROL3 | DSI_CIO_IRQ_ERRCONTROL4 | \ 207 DSI_CIO_IRQ_ERRCONTROL5 | \ 208 DSI_CIO_IRQ_ERRCONTENTIONLP0_1 | DSI_CIO_IRQ_ERRCONTENTIONLP1_1 | \ 209 DSI_CIO_IRQ_ERRCONTENTIONLP0_2 | DSI_CIO_IRQ_ERRCONTENTIONLP1_2 | \ 210 DSI_CIO_IRQ_ERRCONTENTIONLP0_3 | DSI_CIO_IRQ_ERRCONTENTIONLP1_3 | \ 211 DSI_CIO_IRQ_ERRCONTENTIONLP0_4 | DSI_CIO_IRQ_ERRCONTENTIONLP1_4 | \ 212 DSI_CIO_IRQ_ERRCONTENTIONLP0_5 | DSI_CIO_IRQ_ERRCONTENTIONLP1_5) 213 214 typedef void (*omap_dsi_isr_t) (void *arg, u32 mask); 215 216 static int dsi_display_init_dispc(struct platform_device *dsidev, 217 struct omap_overlay_manager *mgr); 218 static void dsi_display_uninit_dispc(struct platform_device *dsidev, 219 struct omap_overlay_manager *mgr); 220 221 static int dsi_vc_send_null(struct omap_dss_device *dssdev, int channel); 222 223 /* DSI PLL HSDIV indices */ 224 #define HSDIV_DISPC 0 225 #define HSDIV_DSI 1 226 227 #define DSI_MAX_NR_ISRS 2 228 #define DSI_MAX_NR_LANES 5 229 230 enum dsi_lane_function { 231 DSI_LANE_UNUSED = 0, 232 DSI_LANE_CLK, 233 DSI_LANE_DATA1, 234 DSI_LANE_DATA2, 235 DSI_LANE_DATA3, 236 DSI_LANE_DATA4, 237 }; 238 239 struct dsi_lane_config { 240 enum dsi_lane_function function; 241 u8 polarity; 242 }; 243 244 struct dsi_isr_data { 245 omap_dsi_isr_t isr; 246 void *arg; 247 u32 mask; 248 }; 249 250 enum fifo_size { 251 DSI_FIFO_SIZE_0 = 0, 252 DSI_FIFO_SIZE_32 = 1, 253 DSI_FIFO_SIZE_64 = 2, 254 DSI_FIFO_SIZE_96 = 3, 255 DSI_FIFO_SIZE_128 = 4, 256 }; 257 258 enum dsi_vc_source { 259 DSI_VC_SOURCE_L4 = 0, 260 DSI_VC_SOURCE_VP, 261 }; 262 263 struct dsi_irq_stats { 264 unsigned long last_reset; 265 unsigned irq_count; 266 unsigned dsi_irqs[32]; 267 unsigned vc_irqs[4][32]; 268 unsigned cio_irqs[32]; 269 }; 270 271 struct dsi_isr_tables { 272 struct dsi_isr_data isr_table[DSI_MAX_NR_ISRS]; 273 struct dsi_isr_data isr_table_vc[4][DSI_MAX_NR_ISRS]; 274 struct dsi_isr_data isr_table_cio[DSI_MAX_NR_ISRS]; 275 }; 276 277 struct dsi_clk_calc_ctx { 278 struct platform_device *dsidev; 279 struct dss_pll *pll; 280 281 /* inputs */ 282 283 const struct omap_dss_dsi_config *config; 284 285 unsigned long req_pck_min, req_pck_nom, req_pck_max; 286 287 /* outputs */ 288 289 struct dss_pll_clock_info dsi_cinfo; 290 struct dispc_clock_info dispc_cinfo; 291 292 struct omap_video_timings dispc_vm; 293 struct omap_dss_dsi_videomode_timings dsi_vm; 294 }; 295 296 struct dsi_lp_clock_info { 297 unsigned long lp_clk; 298 u16 lp_clk_div; 299 }; 300 301 struct dsi_data { 302 struct platform_device *pdev; 303 void __iomem *proto_base; 304 void __iomem *phy_base; 305 void __iomem *pll_base; 306 307 int module_id; 308 309 int irq; 310 311 bool is_enabled; 312 313 struct clk *dss_clk; 314 315 struct dispc_clock_info user_dispc_cinfo; 316 struct dss_pll_clock_info user_dsi_cinfo; 317 318 struct dsi_lp_clock_info user_lp_cinfo; 319 struct dsi_lp_clock_info current_lp_cinfo; 320 321 struct dss_pll pll; 322 323 bool vdds_dsi_enabled; 324 struct regulator *vdds_dsi_reg; 325 326 struct { 327 enum dsi_vc_source source; 328 struct omap_dss_device *dssdev; 329 enum fifo_size tx_fifo_size; 330 enum fifo_size rx_fifo_size; 331 int vc_id; 332 } vc[4]; 333 334 struct mutex lock; 335 struct semaphore bus_lock; 336 337 spinlock_t irq_lock; 338 struct dsi_isr_tables isr_tables; 339 /* space for a copy used by the interrupt handler */ 340 struct dsi_isr_tables isr_tables_copy; 341 342 int update_channel; 343 #ifdef DSI_PERF_MEASURE 344 unsigned update_bytes; 345 #endif 346 347 bool te_enabled; 348 bool ulps_enabled; 349 350 void (*framedone_callback)(int, void *); 351 void *framedone_data; 352 353 struct delayed_work framedone_timeout_work; 354 355 #ifdef DSI_CATCH_MISSING_TE 356 struct timer_list te_timer; 357 #endif 358 359 unsigned long cache_req_pck; 360 unsigned long cache_clk_freq; 361 struct dss_pll_clock_info cache_cinfo; 362 363 u32 errors; 364 spinlock_t errors_lock; 365 #ifdef DSI_PERF_MEASURE 366 ktime_t perf_setup_time; 367 ktime_t perf_start_time; 368 #endif 369 int debug_read; 370 int debug_write; 371 372 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS 373 spinlock_t irq_stats_lock; 374 struct dsi_irq_stats irq_stats; 375 #endif 376 377 unsigned num_lanes_supported; 378 unsigned line_buffer_size; 379 380 struct dsi_lane_config lanes[DSI_MAX_NR_LANES]; 381 unsigned num_lanes_used; 382 383 unsigned scp_clk_refcount; 384 385 struct dss_lcd_mgr_config mgr_config; 386 struct omap_video_timings timings; 387 enum omap_dss_dsi_pixel_format pix_fmt; 388 enum omap_dss_dsi_mode mode; 389 struct omap_dss_dsi_videomode_timings vm_timings; 390 391 struct omap_dss_device output; 392 }; 393 394 struct dsi_packet_sent_handler_data { 395 struct platform_device *dsidev; 396 struct completion *completion; 397 }; 398 399 struct dsi_module_id_data { 400 u32 address; 401 int id; 402 }; 403 404 static const struct of_device_id dsi_of_match[]; 405 406 #ifdef DSI_PERF_MEASURE 407 static bool dsi_perf; 408 module_param(dsi_perf, bool, 0644); 409 #endif 410 411 static inline struct dsi_data *dsi_get_dsidrv_data(struct platform_device *dsidev) 412 { 413 return dev_get_drvdata(&dsidev->dev); 414 } 415 416 static inline struct platform_device *dsi_get_dsidev_from_dssdev(struct omap_dss_device *dssdev) 417 { 418 return to_platform_device(dssdev->dev); 419 } 420 421 static struct platform_device *dsi_get_dsidev_from_id(int module) 422 { 423 struct omap_dss_device *out; 424 enum omap_dss_output_id id; 425 426 switch (module) { 427 case 0: 428 id = OMAP_DSS_OUTPUT_DSI1; 429 break; 430 case 1: 431 id = OMAP_DSS_OUTPUT_DSI2; 432 break; 433 default: 434 return NULL; 435 } 436 437 out = omap_dss_get_output(id); 438 439 return out ? to_platform_device(out->dev) : NULL; 440 } 441 442 static inline void dsi_write_reg(struct platform_device *dsidev, 443 const struct dsi_reg idx, u32 val) 444 { 445 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 446 void __iomem *base; 447 448 switch(idx.module) { 449 case DSI_PROTO: base = dsi->proto_base; break; 450 case DSI_PHY: base = dsi->phy_base; break; 451 case DSI_PLL: base = dsi->pll_base; break; 452 default: return; 453 } 454 455 __raw_writel(val, base + idx.idx); 456 } 457 458 static inline u32 dsi_read_reg(struct platform_device *dsidev, 459 const struct dsi_reg idx) 460 { 461 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 462 void __iomem *base; 463 464 switch(idx.module) { 465 case DSI_PROTO: base = dsi->proto_base; break; 466 case DSI_PHY: base = dsi->phy_base; break; 467 case DSI_PLL: base = dsi->pll_base; break; 468 default: return 0; 469 } 470 471 return __raw_readl(base + idx.idx); 472 } 473 474 static void dsi_bus_lock(struct omap_dss_device *dssdev) 475 { 476 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 477 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 478 479 down(&dsi->bus_lock); 480 } 481 482 static void dsi_bus_unlock(struct omap_dss_device *dssdev) 483 { 484 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 485 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 486 487 up(&dsi->bus_lock); 488 } 489 490 static bool dsi_bus_is_locked(struct platform_device *dsidev) 491 { 492 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 493 494 return dsi->bus_lock.count == 0; 495 } 496 497 static void dsi_completion_handler(void *data, u32 mask) 498 { 499 complete((struct completion *)data); 500 } 501 502 static inline int wait_for_bit_change(struct platform_device *dsidev, 503 const struct dsi_reg idx, int bitnum, int value) 504 { 505 unsigned long timeout; 506 ktime_t wait; 507 int t; 508 509 /* first busyloop to see if the bit changes right away */ 510 t = 100; 511 while (t-- > 0) { 512 if (REG_GET(dsidev, idx, bitnum, bitnum) == value) 513 return value; 514 } 515 516 /* then loop for 500ms, sleeping for 1ms in between */ 517 timeout = jiffies + msecs_to_jiffies(500); 518 while (time_before(jiffies, timeout)) { 519 if (REG_GET(dsidev, idx, bitnum, bitnum) == value) 520 return value; 521 522 wait = ns_to_ktime(1000 * 1000); 523 set_current_state(TASK_UNINTERRUPTIBLE); 524 schedule_hrtimeout(&wait, HRTIMER_MODE_REL); 525 } 526 527 return !value; 528 } 529 530 u8 dsi_get_pixel_size(enum omap_dss_dsi_pixel_format fmt) 531 { 532 switch (fmt) { 533 case OMAP_DSS_DSI_FMT_RGB888: 534 case OMAP_DSS_DSI_FMT_RGB666: 535 return 24; 536 case OMAP_DSS_DSI_FMT_RGB666_PACKED: 537 return 18; 538 case OMAP_DSS_DSI_FMT_RGB565: 539 return 16; 540 default: 541 BUG(); 542 return 0; 543 } 544 } 545 546 #ifdef DSI_PERF_MEASURE 547 static void dsi_perf_mark_setup(struct platform_device *dsidev) 548 { 549 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 550 dsi->perf_setup_time = ktime_get(); 551 } 552 553 static void dsi_perf_mark_start(struct platform_device *dsidev) 554 { 555 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 556 dsi->perf_start_time = ktime_get(); 557 } 558 559 static void dsi_perf_show(struct platform_device *dsidev, const char *name) 560 { 561 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 562 ktime_t t, setup_time, trans_time; 563 u32 total_bytes; 564 u32 setup_us, trans_us, total_us; 565 566 if (!dsi_perf) 567 return; 568 569 t = ktime_get(); 570 571 setup_time = ktime_sub(dsi->perf_start_time, dsi->perf_setup_time); 572 setup_us = (u32)ktime_to_us(setup_time); 573 if (setup_us == 0) 574 setup_us = 1; 575 576 trans_time = ktime_sub(t, dsi->perf_start_time); 577 trans_us = (u32)ktime_to_us(trans_time); 578 if (trans_us == 0) 579 trans_us = 1; 580 581 total_us = setup_us + trans_us; 582 583 total_bytes = dsi->update_bytes; 584 585 printk(KERN_INFO "DSI(%s): %u us + %u us = %u us (%uHz), " 586 "%u bytes, %u kbytes/sec\n", 587 name, 588 setup_us, 589 trans_us, 590 total_us, 591 1000*1000 / total_us, 592 total_bytes, 593 total_bytes * 1000 / total_us); 594 } 595 #else 596 static inline void dsi_perf_mark_setup(struct platform_device *dsidev) 597 { 598 } 599 600 static inline void dsi_perf_mark_start(struct platform_device *dsidev) 601 { 602 } 603 604 static inline void dsi_perf_show(struct platform_device *dsidev, 605 const char *name) 606 { 607 } 608 #endif 609 610 static int verbose_irq; 611 612 static void print_irq_status(u32 status) 613 { 614 if (status == 0) 615 return; 616 617 if (!verbose_irq && (status & ~DSI_IRQ_CHANNEL_MASK) == 0) 618 return; 619 620 #define PIS(x) (status & DSI_IRQ_##x) ? (#x " ") : "" 621 622 pr_debug("DSI IRQ: 0x%x: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", 623 status, 624 verbose_irq ? PIS(VC0) : "", 625 verbose_irq ? PIS(VC1) : "", 626 verbose_irq ? PIS(VC2) : "", 627 verbose_irq ? PIS(VC3) : "", 628 PIS(WAKEUP), 629 PIS(RESYNC), 630 PIS(PLL_LOCK), 631 PIS(PLL_UNLOCK), 632 PIS(PLL_RECALL), 633 PIS(COMPLEXIO_ERR), 634 PIS(HS_TX_TIMEOUT), 635 PIS(LP_RX_TIMEOUT), 636 PIS(TE_TRIGGER), 637 PIS(ACK_TRIGGER), 638 PIS(SYNC_LOST), 639 PIS(LDO_POWER_GOOD), 640 PIS(TA_TIMEOUT)); 641 #undef PIS 642 } 643 644 static void print_irq_status_vc(int channel, u32 status) 645 { 646 if (status == 0) 647 return; 648 649 if (!verbose_irq && (status & ~DSI_VC_IRQ_PACKET_SENT) == 0) 650 return; 651 652 #define PIS(x) (status & DSI_VC_IRQ_##x) ? (#x " ") : "" 653 654 pr_debug("DSI VC(%d) IRQ 0x%x: %s%s%s%s%s%s%s%s%s\n", 655 channel, 656 status, 657 PIS(CS), 658 PIS(ECC_CORR), 659 PIS(ECC_NO_CORR), 660 verbose_irq ? PIS(PACKET_SENT) : "", 661 PIS(BTA), 662 PIS(FIFO_TX_OVF), 663 PIS(FIFO_RX_OVF), 664 PIS(FIFO_TX_UDF), 665 PIS(PP_BUSY_CHANGE)); 666 #undef PIS 667 } 668 669 static void print_irq_status_cio(u32 status) 670 { 671 if (status == 0) 672 return; 673 674 #define PIS(x) (status & DSI_CIO_IRQ_##x) ? (#x " ") : "" 675 676 pr_debug("DSI CIO IRQ 0x%x: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", 677 status, 678 PIS(ERRSYNCESC1), 679 PIS(ERRSYNCESC2), 680 PIS(ERRSYNCESC3), 681 PIS(ERRESC1), 682 PIS(ERRESC2), 683 PIS(ERRESC3), 684 PIS(ERRCONTROL1), 685 PIS(ERRCONTROL2), 686 PIS(ERRCONTROL3), 687 PIS(STATEULPS1), 688 PIS(STATEULPS2), 689 PIS(STATEULPS3), 690 PIS(ERRCONTENTIONLP0_1), 691 PIS(ERRCONTENTIONLP1_1), 692 PIS(ERRCONTENTIONLP0_2), 693 PIS(ERRCONTENTIONLP1_2), 694 PIS(ERRCONTENTIONLP0_3), 695 PIS(ERRCONTENTIONLP1_3), 696 PIS(ULPSACTIVENOT_ALL0), 697 PIS(ULPSACTIVENOT_ALL1)); 698 #undef PIS 699 } 700 701 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS 702 static void dsi_collect_irq_stats(struct platform_device *dsidev, u32 irqstatus, 703 u32 *vcstatus, u32 ciostatus) 704 { 705 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 706 int i; 707 708 spin_lock(&dsi->irq_stats_lock); 709 710 dsi->irq_stats.irq_count++; 711 dss_collect_irq_stats(irqstatus, dsi->irq_stats.dsi_irqs); 712 713 for (i = 0; i < 4; ++i) 714 dss_collect_irq_stats(vcstatus[i], dsi->irq_stats.vc_irqs[i]); 715 716 dss_collect_irq_stats(ciostatus, dsi->irq_stats.cio_irqs); 717 718 spin_unlock(&dsi->irq_stats_lock); 719 } 720 #else 721 #define dsi_collect_irq_stats(dsidev, irqstatus, vcstatus, ciostatus) 722 #endif 723 724 static int debug_irq; 725 726 static void dsi_handle_irq_errors(struct platform_device *dsidev, u32 irqstatus, 727 u32 *vcstatus, u32 ciostatus) 728 { 729 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 730 int i; 731 732 if (irqstatus & DSI_IRQ_ERROR_MASK) { 733 DSSERR("DSI error, irqstatus %x\n", irqstatus); 734 print_irq_status(irqstatus); 735 spin_lock(&dsi->errors_lock); 736 dsi->errors |= irqstatus & DSI_IRQ_ERROR_MASK; 737 spin_unlock(&dsi->errors_lock); 738 } else if (debug_irq) { 739 print_irq_status(irqstatus); 740 } 741 742 for (i = 0; i < 4; ++i) { 743 if (vcstatus[i] & DSI_VC_IRQ_ERROR_MASK) { 744 DSSERR("DSI VC(%d) error, vc irqstatus %x\n", 745 i, vcstatus[i]); 746 print_irq_status_vc(i, vcstatus[i]); 747 } else if (debug_irq) { 748 print_irq_status_vc(i, vcstatus[i]); 749 } 750 } 751 752 if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) { 753 DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus); 754 print_irq_status_cio(ciostatus); 755 } else if (debug_irq) { 756 print_irq_status_cio(ciostatus); 757 } 758 } 759 760 static void dsi_call_isrs(struct dsi_isr_data *isr_array, 761 unsigned isr_array_size, u32 irqstatus) 762 { 763 struct dsi_isr_data *isr_data; 764 int i; 765 766 for (i = 0; i < isr_array_size; i++) { 767 isr_data = &isr_array[i]; 768 if (isr_data->isr && isr_data->mask & irqstatus) 769 isr_data->isr(isr_data->arg, irqstatus); 770 } 771 } 772 773 static void dsi_handle_isrs(struct dsi_isr_tables *isr_tables, 774 u32 irqstatus, u32 *vcstatus, u32 ciostatus) 775 { 776 int i; 777 778 dsi_call_isrs(isr_tables->isr_table, 779 ARRAY_SIZE(isr_tables->isr_table), 780 irqstatus); 781 782 for (i = 0; i < 4; ++i) { 783 if (vcstatus[i] == 0) 784 continue; 785 dsi_call_isrs(isr_tables->isr_table_vc[i], 786 ARRAY_SIZE(isr_tables->isr_table_vc[i]), 787 vcstatus[i]); 788 } 789 790 if (ciostatus != 0) 791 dsi_call_isrs(isr_tables->isr_table_cio, 792 ARRAY_SIZE(isr_tables->isr_table_cio), 793 ciostatus); 794 } 795 796 static irqreturn_t omap_dsi_irq_handler(int irq, void *arg) 797 { 798 struct platform_device *dsidev; 799 struct dsi_data *dsi; 800 u32 irqstatus, vcstatus[4], ciostatus; 801 int i; 802 803 dsidev = (struct platform_device *) arg; 804 dsi = dsi_get_dsidrv_data(dsidev); 805 806 if (!dsi->is_enabled) 807 return IRQ_NONE; 808 809 spin_lock(&dsi->irq_lock); 810 811 irqstatus = dsi_read_reg(dsidev, DSI_IRQSTATUS); 812 813 /* IRQ is not for us */ 814 if (!irqstatus) { 815 spin_unlock(&dsi->irq_lock); 816 return IRQ_NONE; 817 } 818 819 dsi_write_reg(dsidev, DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK); 820 /* flush posted write */ 821 dsi_read_reg(dsidev, DSI_IRQSTATUS); 822 823 for (i = 0; i < 4; ++i) { 824 if ((irqstatus & (1 << i)) == 0) { 825 vcstatus[i] = 0; 826 continue; 827 } 828 829 vcstatus[i] = dsi_read_reg(dsidev, DSI_VC_IRQSTATUS(i)); 830 831 dsi_write_reg(dsidev, DSI_VC_IRQSTATUS(i), vcstatus[i]); 832 /* flush posted write */ 833 dsi_read_reg(dsidev, DSI_VC_IRQSTATUS(i)); 834 } 835 836 if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) { 837 ciostatus = dsi_read_reg(dsidev, DSI_COMPLEXIO_IRQ_STATUS); 838 839 dsi_write_reg(dsidev, DSI_COMPLEXIO_IRQ_STATUS, ciostatus); 840 /* flush posted write */ 841 dsi_read_reg(dsidev, DSI_COMPLEXIO_IRQ_STATUS); 842 } else { 843 ciostatus = 0; 844 } 845 846 #ifdef DSI_CATCH_MISSING_TE 847 if (irqstatus & DSI_IRQ_TE_TRIGGER) 848 del_timer(&dsi->te_timer); 849 #endif 850 851 /* make a copy and unlock, so that isrs can unregister 852 * themselves */ 853 memcpy(&dsi->isr_tables_copy, &dsi->isr_tables, 854 sizeof(dsi->isr_tables)); 855 856 spin_unlock(&dsi->irq_lock); 857 858 dsi_handle_isrs(&dsi->isr_tables_copy, irqstatus, vcstatus, ciostatus); 859 860 dsi_handle_irq_errors(dsidev, irqstatus, vcstatus, ciostatus); 861 862 dsi_collect_irq_stats(dsidev, irqstatus, vcstatus, ciostatus); 863 864 return IRQ_HANDLED; 865 } 866 867 /* dsi->irq_lock has to be locked by the caller */ 868 static void _omap_dsi_configure_irqs(struct platform_device *dsidev, 869 struct dsi_isr_data *isr_array, 870 unsigned isr_array_size, u32 default_mask, 871 const struct dsi_reg enable_reg, 872 const struct dsi_reg status_reg) 873 { 874 struct dsi_isr_data *isr_data; 875 u32 mask; 876 u32 old_mask; 877 int i; 878 879 mask = default_mask; 880 881 for (i = 0; i < isr_array_size; i++) { 882 isr_data = &isr_array[i]; 883 884 if (isr_data->isr == NULL) 885 continue; 886 887 mask |= isr_data->mask; 888 } 889 890 old_mask = dsi_read_reg(dsidev, enable_reg); 891 /* clear the irqstatus for newly enabled irqs */ 892 dsi_write_reg(dsidev, status_reg, (mask ^ old_mask) & mask); 893 dsi_write_reg(dsidev, enable_reg, mask); 894 895 /* flush posted writes */ 896 dsi_read_reg(dsidev, enable_reg); 897 dsi_read_reg(dsidev, status_reg); 898 } 899 900 /* dsi->irq_lock has to be locked by the caller */ 901 static void _omap_dsi_set_irqs(struct platform_device *dsidev) 902 { 903 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 904 u32 mask = DSI_IRQ_ERROR_MASK; 905 #ifdef DSI_CATCH_MISSING_TE 906 mask |= DSI_IRQ_TE_TRIGGER; 907 #endif 908 _omap_dsi_configure_irqs(dsidev, dsi->isr_tables.isr_table, 909 ARRAY_SIZE(dsi->isr_tables.isr_table), mask, 910 DSI_IRQENABLE, DSI_IRQSTATUS); 911 } 912 913 /* dsi->irq_lock has to be locked by the caller */ 914 static void _omap_dsi_set_irqs_vc(struct platform_device *dsidev, int vc) 915 { 916 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 917 918 _omap_dsi_configure_irqs(dsidev, dsi->isr_tables.isr_table_vc[vc], 919 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[vc]), 920 DSI_VC_IRQ_ERROR_MASK, 921 DSI_VC_IRQENABLE(vc), DSI_VC_IRQSTATUS(vc)); 922 } 923 924 /* dsi->irq_lock has to be locked by the caller */ 925 static void _omap_dsi_set_irqs_cio(struct platform_device *dsidev) 926 { 927 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 928 929 _omap_dsi_configure_irqs(dsidev, dsi->isr_tables.isr_table_cio, 930 ARRAY_SIZE(dsi->isr_tables.isr_table_cio), 931 DSI_CIO_IRQ_ERROR_MASK, 932 DSI_COMPLEXIO_IRQ_ENABLE, DSI_COMPLEXIO_IRQ_STATUS); 933 } 934 935 static void _dsi_initialize_irq(struct platform_device *dsidev) 936 { 937 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 938 unsigned long flags; 939 int vc; 940 941 spin_lock_irqsave(&dsi->irq_lock, flags); 942 943 memset(&dsi->isr_tables, 0, sizeof(dsi->isr_tables)); 944 945 _omap_dsi_set_irqs(dsidev); 946 for (vc = 0; vc < 4; ++vc) 947 _omap_dsi_set_irqs_vc(dsidev, vc); 948 _omap_dsi_set_irqs_cio(dsidev); 949 950 spin_unlock_irqrestore(&dsi->irq_lock, flags); 951 } 952 953 static int _dsi_register_isr(omap_dsi_isr_t isr, void *arg, u32 mask, 954 struct dsi_isr_data *isr_array, unsigned isr_array_size) 955 { 956 struct dsi_isr_data *isr_data; 957 int free_idx; 958 int i; 959 960 BUG_ON(isr == NULL); 961 962 /* check for duplicate entry and find a free slot */ 963 free_idx = -1; 964 for (i = 0; i < isr_array_size; i++) { 965 isr_data = &isr_array[i]; 966 967 if (isr_data->isr == isr && isr_data->arg == arg && 968 isr_data->mask == mask) { 969 return -EINVAL; 970 } 971 972 if (isr_data->isr == NULL && free_idx == -1) 973 free_idx = i; 974 } 975 976 if (free_idx == -1) 977 return -EBUSY; 978 979 isr_data = &isr_array[free_idx]; 980 isr_data->isr = isr; 981 isr_data->arg = arg; 982 isr_data->mask = mask; 983 984 return 0; 985 } 986 987 static int _dsi_unregister_isr(omap_dsi_isr_t isr, void *arg, u32 mask, 988 struct dsi_isr_data *isr_array, unsigned isr_array_size) 989 { 990 struct dsi_isr_data *isr_data; 991 int i; 992 993 for (i = 0; i < isr_array_size; i++) { 994 isr_data = &isr_array[i]; 995 if (isr_data->isr != isr || isr_data->arg != arg || 996 isr_data->mask != mask) 997 continue; 998 999 isr_data->isr = NULL; 1000 isr_data->arg = NULL; 1001 isr_data->mask = 0; 1002 1003 return 0; 1004 } 1005 1006 return -EINVAL; 1007 } 1008 1009 static int dsi_register_isr(struct platform_device *dsidev, omap_dsi_isr_t isr, 1010 void *arg, u32 mask) 1011 { 1012 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1013 unsigned long flags; 1014 int r; 1015 1016 spin_lock_irqsave(&dsi->irq_lock, flags); 1017 1018 r = _dsi_register_isr(isr, arg, mask, dsi->isr_tables.isr_table, 1019 ARRAY_SIZE(dsi->isr_tables.isr_table)); 1020 1021 if (r == 0) 1022 _omap_dsi_set_irqs(dsidev); 1023 1024 spin_unlock_irqrestore(&dsi->irq_lock, flags); 1025 1026 return r; 1027 } 1028 1029 static int dsi_unregister_isr(struct platform_device *dsidev, 1030 omap_dsi_isr_t isr, void *arg, u32 mask) 1031 { 1032 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1033 unsigned long flags; 1034 int r; 1035 1036 spin_lock_irqsave(&dsi->irq_lock, flags); 1037 1038 r = _dsi_unregister_isr(isr, arg, mask, dsi->isr_tables.isr_table, 1039 ARRAY_SIZE(dsi->isr_tables.isr_table)); 1040 1041 if (r == 0) 1042 _omap_dsi_set_irqs(dsidev); 1043 1044 spin_unlock_irqrestore(&dsi->irq_lock, flags); 1045 1046 return r; 1047 } 1048 1049 static int dsi_register_isr_vc(struct platform_device *dsidev, int channel, 1050 omap_dsi_isr_t isr, void *arg, u32 mask) 1051 { 1052 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1053 unsigned long flags; 1054 int r; 1055 1056 spin_lock_irqsave(&dsi->irq_lock, flags); 1057 1058 r = _dsi_register_isr(isr, arg, mask, 1059 dsi->isr_tables.isr_table_vc[channel], 1060 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[channel])); 1061 1062 if (r == 0) 1063 _omap_dsi_set_irqs_vc(dsidev, channel); 1064 1065 spin_unlock_irqrestore(&dsi->irq_lock, flags); 1066 1067 return r; 1068 } 1069 1070 static int dsi_unregister_isr_vc(struct platform_device *dsidev, int channel, 1071 omap_dsi_isr_t isr, void *arg, u32 mask) 1072 { 1073 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1074 unsigned long flags; 1075 int r; 1076 1077 spin_lock_irqsave(&dsi->irq_lock, flags); 1078 1079 r = _dsi_unregister_isr(isr, arg, mask, 1080 dsi->isr_tables.isr_table_vc[channel], 1081 ARRAY_SIZE(dsi->isr_tables.isr_table_vc[channel])); 1082 1083 if (r == 0) 1084 _omap_dsi_set_irqs_vc(dsidev, channel); 1085 1086 spin_unlock_irqrestore(&dsi->irq_lock, flags); 1087 1088 return r; 1089 } 1090 1091 static int dsi_register_isr_cio(struct platform_device *dsidev, 1092 omap_dsi_isr_t isr, void *arg, u32 mask) 1093 { 1094 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1095 unsigned long flags; 1096 int r; 1097 1098 spin_lock_irqsave(&dsi->irq_lock, flags); 1099 1100 r = _dsi_register_isr(isr, arg, mask, dsi->isr_tables.isr_table_cio, 1101 ARRAY_SIZE(dsi->isr_tables.isr_table_cio)); 1102 1103 if (r == 0) 1104 _omap_dsi_set_irqs_cio(dsidev); 1105 1106 spin_unlock_irqrestore(&dsi->irq_lock, flags); 1107 1108 return r; 1109 } 1110 1111 static int dsi_unregister_isr_cio(struct platform_device *dsidev, 1112 omap_dsi_isr_t isr, void *arg, u32 mask) 1113 { 1114 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1115 unsigned long flags; 1116 int r; 1117 1118 spin_lock_irqsave(&dsi->irq_lock, flags); 1119 1120 r = _dsi_unregister_isr(isr, arg, mask, dsi->isr_tables.isr_table_cio, 1121 ARRAY_SIZE(dsi->isr_tables.isr_table_cio)); 1122 1123 if (r == 0) 1124 _omap_dsi_set_irqs_cio(dsidev); 1125 1126 spin_unlock_irqrestore(&dsi->irq_lock, flags); 1127 1128 return r; 1129 } 1130 1131 static u32 dsi_get_errors(struct platform_device *dsidev) 1132 { 1133 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1134 unsigned long flags; 1135 u32 e; 1136 spin_lock_irqsave(&dsi->errors_lock, flags); 1137 e = dsi->errors; 1138 dsi->errors = 0; 1139 spin_unlock_irqrestore(&dsi->errors_lock, flags); 1140 return e; 1141 } 1142 1143 static int dsi_runtime_get(struct platform_device *dsidev) 1144 { 1145 int r; 1146 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1147 1148 DSSDBG("dsi_runtime_get\n"); 1149 1150 r = pm_runtime_get_sync(&dsi->pdev->dev); 1151 WARN_ON(r < 0); 1152 return r < 0 ? r : 0; 1153 } 1154 1155 static void dsi_runtime_put(struct platform_device *dsidev) 1156 { 1157 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1158 int r; 1159 1160 DSSDBG("dsi_runtime_put\n"); 1161 1162 r = pm_runtime_put_sync(&dsi->pdev->dev); 1163 WARN_ON(r < 0 && r != -ENOSYS); 1164 } 1165 1166 static int dsi_regulator_init(struct platform_device *dsidev) 1167 { 1168 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1169 struct regulator *vdds_dsi; 1170 1171 if (dsi->vdds_dsi_reg != NULL) 1172 return 0; 1173 1174 vdds_dsi = devm_regulator_get(&dsi->pdev->dev, "vdd"); 1175 1176 if (IS_ERR(vdds_dsi)) { 1177 if (PTR_ERR(vdds_dsi) != -EPROBE_DEFER) 1178 DSSERR("can't get DSI VDD regulator\n"); 1179 return PTR_ERR(vdds_dsi); 1180 } 1181 1182 dsi->vdds_dsi_reg = vdds_dsi; 1183 1184 return 0; 1185 } 1186 1187 static void _dsi_print_reset_status(struct platform_device *dsidev) 1188 { 1189 u32 l; 1190 int b0, b1, b2; 1191 1192 /* A dummy read using the SCP interface to any DSIPHY register is 1193 * required after DSIPHY reset to complete the reset of the DSI complex 1194 * I/O. */ 1195 l = dsi_read_reg(dsidev, DSI_DSIPHY_CFG5); 1196 1197 if (dss_has_feature(FEAT_DSI_REVERSE_TXCLKESC)) { 1198 b0 = 28; 1199 b1 = 27; 1200 b2 = 26; 1201 } else { 1202 b0 = 24; 1203 b1 = 25; 1204 b2 = 26; 1205 } 1206 1207 #define DSI_FLD_GET(fld, start, end)\ 1208 FLD_GET(dsi_read_reg(dsidev, DSI_##fld), start, end) 1209 1210 pr_debug("DSI resets: PLL (%d) CIO (%d) PHY (%x%x%x, %d, %d, %d)\n", 1211 DSI_FLD_GET(PLL_STATUS, 0, 0), 1212 DSI_FLD_GET(COMPLEXIO_CFG1, 29, 29), 1213 DSI_FLD_GET(DSIPHY_CFG5, b0, b0), 1214 DSI_FLD_GET(DSIPHY_CFG5, b1, b1), 1215 DSI_FLD_GET(DSIPHY_CFG5, b2, b2), 1216 DSI_FLD_GET(DSIPHY_CFG5, 29, 29), 1217 DSI_FLD_GET(DSIPHY_CFG5, 30, 30), 1218 DSI_FLD_GET(DSIPHY_CFG5, 31, 31)); 1219 1220 #undef DSI_FLD_GET 1221 } 1222 1223 static inline int dsi_if_enable(struct platform_device *dsidev, bool enable) 1224 { 1225 DSSDBG("dsi_if_enable(%d)\n", enable); 1226 1227 enable = enable ? 1 : 0; 1228 REG_FLD_MOD(dsidev, DSI_CTRL, enable, 0, 0); /* IF_EN */ 1229 1230 if (wait_for_bit_change(dsidev, DSI_CTRL, 0, enable) != enable) { 1231 DSSERR("Failed to set dsi_if_enable to %d\n", enable); 1232 return -EIO; 1233 } 1234 1235 return 0; 1236 } 1237 1238 static unsigned long dsi_get_pll_hsdiv_dispc_rate(struct platform_device *dsidev) 1239 { 1240 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1241 1242 return dsi->pll.cinfo.clkout[HSDIV_DISPC]; 1243 } 1244 1245 static unsigned long dsi_get_pll_hsdiv_dsi_rate(struct platform_device *dsidev) 1246 { 1247 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1248 1249 return dsi->pll.cinfo.clkout[HSDIV_DSI]; 1250 } 1251 1252 static unsigned long dsi_get_txbyteclkhs(struct platform_device *dsidev) 1253 { 1254 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1255 1256 return dsi->pll.cinfo.clkdco / 16; 1257 } 1258 1259 static unsigned long dsi_fclk_rate(struct platform_device *dsidev) 1260 { 1261 unsigned long r; 1262 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1263 1264 if (dss_get_dsi_clk_source(dsi->module_id) == OMAP_DSS_CLK_SRC_FCK) { 1265 /* DSI FCLK source is DSS_CLK_FCK */ 1266 r = clk_get_rate(dsi->dss_clk); 1267 } else { 1268 /* DSI FCLK source is dsi_pll_hsdiv_dsi_clk */ 1269 r = dsi_get_pll_hsdiv_dsi_rate(dsidev); 1270 } 1271 1272 return r; 1273 } 1274 1275 static int dsi_lp_clock_calc(unsigned long dsi_fclk, 1276 unsigned long lp_clk_min, unsigned long lp_clk_max, 1277 struct dsi_lp_clock_info *lp_cinfo) 1278 { 1279 unsigned lp_clk_div; 1280 unsigned long lp_clk; 1281 1282 lp_clk_div = DIV_ROUND_UP(dsi_fclk, lp_clk_max * 2); 1283 lp_clk = dsi_fclk / 2 / lp_clk_div; 1284 1285 if (lp_clk < lp_clk_min || lp_clk > lp_clk_max) 1286 return -EINVAL; 1287 1288 lp_cinfo->lp_clk_div = lp_clk_div; 1289 lp_cinfo->lp_clk = lp_clk; 1290 1291 return 0; 1292 } 1293 1294 static int dsi_set_lp_clk_divisor(struct platform_device *dsidev) 1295 { 1296 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1297 unsigned long dsi_fclk; 1298 unsigned lp_clk_div; 1299 unsigned long lp_clk; 1300 unsigned lpdiv_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_LPDIV); 1301 1302 1303 lp_clk_div = dsi->user_lp_cinfo.lp_clk_div; 1304 1305 if (lp_clk_div == 0 || lp_clk_div > lpdiv_max) 1306 return -EINVAL; 1307 1308 dsi_fclk = dsi_fclk_rate(dsidev); 1309 1310 lp_clk = dsi_fclk / 2 / lp_clk_div; 1311 1312 DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk); 1313 dsi->current_lp_cinfo.lp_clk = lp_clk; 1314 dsi->current_lp_cinfo.lp_clk_div = lp_clk_div; 1315 1316 /* LP_CLK_DIVISOR */ 1317 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, lp_clk_div, 12, 0); 1318 1319 /* LP_RX_SYNCHRO_ENABLE */ 1320 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0, 21, 21); 1321 1322 return 0; 1323 } 1324 1325 static void dsi_enable_scp_clk(struct platform_device *dsidev) 1326 { 1327 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1328 1329 if (dsi->scp_clk_refcount++ == 0) 1330 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 1, 14, 14); /* CIO_CLK_ICG */ 1331 } 1332 1333 static void dsi_disable_scp_clk(struct platform_device *dsidev) 1334 { 1335 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1336 1337 WARN_ON(dsi->scp_clk_refcount == 0); 1338 if (--dsi->scp_clk_refcount == 0) 1339 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 14, 14); /* CIO_CLK_ICG */ 1340 } 1341 1342 enum dsi_pll_power_state { 1343 DSI_PLL_POWER_OFF = 0x0, 1344 DSI_PLL_POWER_ON_HSCLK = 0x1, 1345 DSI_PLL_POWER_ON_ALL = 0x2, 1346 DSI_PLL_POWER_ON_DIV = 0x3, 1347 }; 1348 1349 static int dsi_pll_power(struct platform_device *dsidev, 1350 enum dsi_pll_power_state state) 1351 { 1352 int t = 0; 1353 1354 /* DSI-PLL power command 0x3 is not working */ 1355 if (dss_has_feature(FEAT_DSI_PLL_PWR_BUG) && 1356 state == DSI_PLL_POWER_ON_DIV) 1357 state = DSI_PLL_POWER_ON_ALL; 1358 1359 /* PLL_PWR_CMD */ 1360 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, state, 31, 30); 1361 1362 /* PLL_PWR_STATUS */ 1363 while (FLD_GET(dsi_read_reg(dsidev, DSI_CLK_CTRL), 29, 28) != state) { 1364 if (++t > 1000) { 1365 DSSERR("Failed to set DSI PLL power mode to %d\n", 1366 state); 1367 return -ENODEV; 1368 } 1369 udelay(1); 1370 } 1371 1372 return 0; 1373 } 1374 1375 1376 static void dsi_pll_calc_dsi_fck(struct dss_pll_clock_info *cinfo) 1377 { 1378 unsigned long max_dsi_fck; 1379 1380 max_dsi_fck = dss_feat_get_param_max(FEAT_PARAM_DSI_FCK); 1381 1382 cinfo->mX[HSDIV_DSI] = DIV_ROUND_UP(cinfo->clkdco, max_dsi_fck); 1383 cinfo->clkout[HSDIV_DSI] = cinfo->clkdco / cinfo->mX[HSDIV_DSI]; 1384 } 1385 1386 static int dsi_pll_enable(struct dss_pll *pll) 1387 { 1388 struct dsi_data *dsi = container_of(pll, struct dsi_data, pll); 1389 struct platform_device *dsidev = dsi->pdev; 1390 int r = 0; 1391 1392 DSSDBG("PLL init\n"); 1393 1394 r = dsi_regulator_init(dsidev); 1395 if (r) 1396 return r; 1397 1398 r = dsi_runtime_get(dsidev); 1399 if (r) 1400 return r; 1401 1402 /* 1403 * Note: SCP CLK is not required on OMAP3, but it is required on OMAP4. 1404 */ 1405 dsi_enable_scp_clk(dsidev); 1406 1407 if (!dsi->vdds_dsi_enabled) { 1408 r = regulator_enable(dsi->vdds_dsi_reg); 1409 if (r) 1410 goto err0; 1411 dsi->vdds_dsi_enabled = true; 1412 } 1413 1414 /* XXX PLL does not come out of reset without this... */ 1415 dispc_pck_free_enable(1); 1416 1417 if (wait_for_bit_change(dsidev, DSI_PLL_STATUS, 0, 1) != 1) { 1418 DSSERR("PLL not coming out of reset.\n"); 1419 r = -ENODEV; 1420 dispc_pck_free_enable(0); 1421 goto err1; 1422 } 1423 1424 /* XXX ... but if left on, we get problems when planes do not 1425 * fill the whole display. No idea about this */ 1426 dispc_pck_free_enable(0); 1427 1428 r = dsi_pll_power(dsidev, DSI_PLL_POWER_ON_ALL); 1429 1430 if (r) 1431 goto err1; 1432 1433 DSSDBG("PLL init done\n"); 1434 1435 return 0; 1436 err1: 1437 if (dsi->vdds_dsi_enabled) { 1438 regulator_disable(dsi->vdds_dsi_reg); 1439 dsi->vdds_dsi_enabled = false; 1440 } 1441 err0: 1442 dsi_disable_scp_clk(dsidev); 1443 dsi_runtime_put(dsidev); 1444 return r; 1445 } 1446 1447 static void dsi_pll_uninit(struct platform_device *dsidev, bool disconnect_lanes) 1448 { 1449 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1450 1451 dsi_pll_power(dsidev, DSI_PLL_POWER_OFF); 1452 if (disconnect_lanes) { 1453 WARN_ON(!dsi->vdds_dsi_enabled); 1454 regulator_disable(dsi->vdds_dsi_reg); 1455 dsi->vdds_dsi_enabled = false; 1456 } 1457 1458 dsi_disable_scp_clk(dsidev); 1459 dsi_runtime_put(dsidev); 1460 1461 DSSDBG("PLL uninit done\n"); 1462 } 1463 1464 static void dsi_pll_disable(struct dss_pll *pll) 1465 { 1466 struct dsi_data *dsi = container_of(pll, struct dsi_data, pll); 1467 struct platform_device *dsidev = dsi->pdev; 1468 1469 dsi_pll_uninit(dsidev, true); 1470 } 1471 1472 static void dsi_dump_dsidev_clocks(struct platform_device *dsidev, 1473 struct seq_file *s) 1474 { 1475 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1476 struct dss_pll_clock_info *cinfo = &dsi->pll.cinfo; 1477 enum omap_dss_clk_source dispc_clk_src, dsi_clk_src; 1478 int dsi_module = dsi->module_id; 1479 struct dss_pll *pll = &dsi->pll; 1480 1481 dispc_clk_src = dss_get_dispc_clk_source(); 1482 dsi_clk_src = dss_get_dsi_clk_source(dsi_module); 1483 1484 if (dsi_runtime_get(dsidev)) 1485 return; 1486 1487 seq_printf(s, "- DSI%d PLL -\n", dsi_module + 1); 1488 1489 seq_printf(s, "dsi pll clkin\t%lu\n", clk_get_rate(pll->clkin)); 1490 1491 seq_printf(s, "Fint\t\t%-16lun %u\n", cinfo->fint, cinfo->n); 1492 1493 seq_printf(s, "CLKIN4DDR\t%-16lum %u\n", 1494 cinfo->clkdco, cinfo->m); 1495 1496 seq_printf(s, "DSI_PLL_HSDIV_DISPC (%s)\t%-16lum_dispc %u\t(%s)\n", 1497 dss_feat_get_clk_source_name(dsi_module == 0 ? 1498 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC : 1499 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC), 1500 cinfo->clkout[HSDIV_DISPC], 1501 cinfo->mX[HSDIV_DISPC], 1502 dispc_clk_src == OMAP_DSS_CLK_SRC_FCK ? 1503 "off" : "on"); 1504 1505 seq_printf(s, "DSI_PLL_HSDIV_DSI (%s)\t%-16lum_dsi %u\t(%s)\n", 1506 dss_feat_get_clk_source_name(dsi_module == 0 ? 1507 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI : 1508 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI), 1509 cinfo->clkout[HSDIV_DSI], 1510 cinfo->mX[HSDIV_DSI], 1511 dsi_clk_src == OMAP_DSS_CLK_SRC_FCK ? 1512 "off" : "on"); 1513 1514 seq_printf(s, "- DSI%d -\n", dsi_module + 1); 1515 1516 seq_printf(s, "dsi fclk source = %s (%s)\n", 1517 dss_get_generic_clk_source_name(dsi_clk_src), 1518 dss_feat_get_clk_source_name(dsi_clk_src)); 1519 1520 seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate(dsidev)); 1521 1522 seq_printf(s, "DDR_CLK\t\t%lu\n", 1523 cinfo->clkdco / 4); 1524 1525 seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs(dsidev)); 1526 1527 seq_printf(s, "LP_CLK\t\t%lu\n", dsi->current_lp_cinfo.lp_clk); 1528 1529 dsi_runtime_put(dsidev); 1530 } 1531 1532 void dsi_dump_clocks(struct seq_file *s) 1533 { 1534 struct platform_device *dsidev; 1535 int i; 1536 1537 for (i = 0; i < MAX_NUM_DSI; i++) { 1538 dsidev = dsi_get_dsidev_from_id(i); 1539 if (dsidev) 1540 dsi_dump_dsidev_clocks(dsidev, s); 1541 } 1542 } 1543 1544 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS 1545 static void dsi_dump_dsidev_irqs(struct platform_device *dsidev, 1546 struct seq_file *s) 1547 { 1548 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1549 unsigned long flags; 1550 struct dsi_irq_stats stats; 1551 1552 spin_lock_irqsave(&dsi->irq_stats_lock, flags); 1553 1554 stats = dsi->irq_stats; 1555 memset(&dsi->irq_stats, 0, sizeof(dsi->irq_stats)); 1556 dsi->irq_stats.last_reset = jiffies; 1557 1558 spin_unlock_irqrestore(&dsi->irq_stats_lock, flags); 1559 1560 seq_printf(s, "period %u ms\n", 1561 jiffies_to_msecs(jiffies - stats.last_reset)); 1562 1563 seq_printf(s, "irqs %d\n", stats.irq_count); 1564 #define PIS(x) \ 1565 seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]); 1566 1567 seq_printf(s, "-- DSI%d interrupts --\n", dsi->module_id + 1); 1568 PIS(VC0); 1569 PIS(VC1); 1570 PIS(VC2); 1571 PIS(VC3); 1572 PIS(WAKEUP); 1573 PIS(RESYNC); 1574 PIS(PLL_LOCK); 1575 PIS(PLL_UNLOCK); 1576 PIS(PLL_RECALL); 1577 PIS(COMPLEXIO_ERR); 1578 PIS(HS_TX_TIMEOUT); 1579 PIS(LP_RX_TIMEOUT); 1580 PIS(TE_TRIGGER); 1581 PIS(ACK_TRIGGER); 1582 PIS(SYNC_LOST); 1583 PIS(LDO_POWER_GOOD); 1584 PIS(TA_TIMEOUT); 1585 #undef PIS 1586 1587 #define PIS(x) \ 1588 seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \ 1589 stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \ 1590 stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \ 1591 stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \ 1592 stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]); 1593 1594 seq_printf(s, "-- VC interrupts --\n"); 1595 PIS(CS); 1596 PIS(ECC_CORR); 1597 PIS(PACKET_SENT); 1598 PIS(FIFO_TX_OVF); 1599 PIS(FIFO_RX_OVF); 1600 PIS(BTA); 1601 PIS(ECC_NO_CORR); 1602 PIS(FIFO_TX_UDF); 1603 PIS(PP_BUSY_CHANGE); 1604 #undef PIS 1605 1606 #define PIS(x) \ 1607 seq_printf(s, "%-20s %10d\n", #x, \ 1608 stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]); 1609 1610 seq_printf(s, "-- CIO interrupts --\n"); 1611 PIS(ERRSYNCESC1); 1612 PIS(ERRSYNCESC2); 1613 PIS(ERRSYNCESC3); 1614 PIS(ERRESC1); 1615 PIS(ERRESC2); 1616 PIS(ERRESC3); 1617 PIS(ERRCONTROL1); 1618 PIS(ERRCONTROL2); 1619 PIS(ERRCONTROL3); 1620 PIS(STATEULPS1); 1621 PIS(STATEULPS2); 1622 PIS(STATEULPS3); 1623 PIS(ERRCONTENTIONLP0_1); 1624 PIS(ERRCONTENTIONLP1_1); 1625 PIS(ERRCONTENTIONLP0_2); 1626 PIS(ERRCONTENTIONLP1_2); 1627 PIS(ERRCONTENTIONLP0_3); 1628 PIS(ERRCONTENTIONLP1_3); 1629 PIS(ULPSACTIVENOT_ALL0); 1630 PIS(ULPSACTIVENOT_ALL1); 1631 #undef PIS 1632 } 1633 1634 static void dsi1_dump_irqs(struct seq_file *s) 1635 { 1636 struct platform_device *dsidev = dsi_get_dsidev_from_id(0); 1637 1638 dsi_dump_dsidev_irqs(dsidev, s); 1639 } 1640 1641 static void dsi2_dump_irqs(struct seq_file *s) 1642 { 1643 struct platform_device *dsidev = dsi_get_dsidev_from_id(1); 1644 1645 dsi_dump_dsidev_irqs(dsidev, s); 1646 } 1647 #endif 1648 1649 static void dsi_dump_dsidev_regs(struct platform_device *dsidev, 1650 struct seq_file *s) 1651 { 1652 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(dsidev, r)) 1653 1654 if (dsi_runtime_get(dsidev)) 1655 return; 1656 dsi_enable_scp_clk(dsidev); 1657 1658 DUMPREG(DSI_REVISION); 1659 DUMPREG(DSI_SYSCONFIG); 1660 DUMPREG(DSI_SYSSTATUS); 1661 DUMPREG(DSI_IRQSTATUS); 1662 DUMPREG(DSI_IRQENABLE); 1663 DUMPREG(DSI_CTRL); 1664 DUMPREG(DSI_COMPLEXIO_CFG1); 1665 DUMPREG(DSI_COMPLEXIO_IRQ_STATUS); 1666 DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE); 1667 DUMPREG(DSI_CLK_CTRL); 1668 DUMPREG(DSI_TIMING1); 1669 DUMPREG(DSI_TIMING2); 1670 DUMPREG(DSI_VM_TIMING1); 1671 DUMPREG(DSI_VM_TIMING2); 1672 DUMPREG(DSI_VM_TIMING3); 1673 DUMPREG(DSI_CLK_TIMING); 1674 DUMPREG(DSI_TX_FIFO_VC_SIZE); 1675 DUMPREG(DSI_RX_FIFO_VC_SIZE); 1676 DUMPREG(DSI_COMPLEXIO_CFG2); 1677 DUMPREG(DSI_RX_FIFO_VC_FULLNESS); 1678 DUMPREG(DSI_VM_TIMING4); 1679 DUMPREG(DSI_TX_FIFO_VC_EMPTINESS); 1680 DUMPREG(DSI_VM_TIMING5); 1681 DUMPREG(DSI_VM_TIMING6); 1682 DUMPREG(DSI_VM_TIMING7); 1683 DUMPREG(DSI_STOPCLK_TIMING); 1684 1685 DUMPREG(DSI_VC_CTRL(0)); 1686 DUMPREG(DSI_VC_TE(0)); 1687 DUMPREG(DSI_VC_LONG_PACKET_HEADER(0)); 1688 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0)); 1689 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0)); 1690 DUMPREG(DSI_VC_IRQSTATUS(0)); 1691 DUMPREG(DSI_VC_IRQENABLE(0)); 1692 1693 DUMPREG(DSI_VC_CTRL(1)); 1694 DUMPREG(DSI_VC_TE(1)); 1695 DUMPREG(DSI_VC_LONG_PACKET_HEADER(1)); 1696 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1)); 1697 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1)); 1698 DUMPREG(DSI_VC_IRQSTATUS(1)); 1699 DUMPREG(DSI_VC_IRQENABLE(1)); 1700 1701 DUMPREG(DSI_VC_CTRL(2)); 1702 DUMPREG(DSI_VC_TE(2)); 1703 DUMPREG(DSI_VC_LONG_PACKET_HEADER(2)); 1704 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2)); 1705 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2)); 1706 DUMPREG(DSI_VC_IRQSTATUS(2)); 1707 DUMPREG(DSI_VC_IRQENABLE(2)); 1708 1709 DUMPREG(DSI_VC_CTRL(3)); 1710 DUMPREG(DSI_VC_TE(3)); 1711 DUMPREG(DSI_VC_LONG_PACKET_HEADER(3)); 1712 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3)); 1713 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3)); 1714 DUMPREG(DSI_VC_IRQSTATUS(3)); 1715 DUMPREG(DSI_VC_IRQENABLE(3)); 1716 1717 DUMPREG(DSI_DSIPHY_CFG0); 1718 DUMPREG(DSI_DSIPHY_CFG1); 1719 DUMPREG(DSI_DSIPHY_CFG2); 1720 DUMPREG(DSI_DSIPHY_CFG5); 1721 1722 DUMPREG(DSI_PLL_CONTROL); 1723 DUMPREG(DSI_PLL_STATUS); 1724 DUMPREG(DSI_PLL_GO); 1725 DUMPREG(DSI_PLL_CONFIGURATION1); 1726 DUMPREG(DSI_PLL_CONFIGURATION2); 1727 1728 dsi_disable_scp_clk(dsidev); 1729 dsi_runtime_put(dsidev); 1730 #undef DUMPREG 1731 } 1732 1733 static void dsi1_dump_regs(struct seq_file *s) 1734 { 1735 struct platform_device *dsidev = dsi_get_dsidev_from_id(0); 1736 1737 dsi_dump_dsidev_regs(dsidev, s); 1738 } 1739 1740 static void dsi2_dump_regs(struct seq_file *s) 1741 { 1742 struct platform_device *dsidev = dsi_get_dsidev_from_id(1); 1743 1744 dsi_dump_dsidev_regs(dsidev, s); 1745 } 1746 1747 enum dsi_cio_power_state { 1748 DSI_COMPLEXIO_POWER_OFF = 0x0, 1749 DSI_COMPLEXIO_POWER_ON = 0x1, 1750 DSI_COMPLEXIO_POWER_ULPS = 0x2, 1751 }; 1752 1753 static int dsi_cio_power(struct platform_device *dsidev, 1754 enum dsi_cio_power_state state) 1755 { 1756 int t = 0; 1757 1758 /* PWR_CMD */ 1759 REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG1, state, 28, 27); 1760 1761 /* PWR_STATUS */ 1762 while (FLD_GET(dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG1), 1763 26, 25) != state) { 1764 if (++t > 1000) { 1765 DSSERR("failed to set complexio power state to " 1766 "%d\n", state); 1767 return -ENODEV; 1768 } 1769 udelay(1); 1770 } 1771 1772 return 0; 1773 } 1774 1775 static unsigned dsi_get_line_buf_size(struct platform_device *dsidev) 1776 { 1777 int val; 1778 1779 /* line buffer on OMAP3 is 1024 x 24bits */ 1780 /* XXX: for some reason using full buffer size causes 1781 * considerable TX slowdown with update sizes that fill the 1782 * whole buffer */ 1783 if (!dss_has_feature(FEAT_DSI_GNQ)) 1784 return 1023 * 3; 1785 1786 val = REG_GET(dsidev, DSI_GNQ, 14, 12); /* VP1_LINE_BUFFER_SIZE */ 1787 1788 switch (val) { 1789 case 1: 1790 return 512 * 3; /* 512x24 bits */ 1791 case 2: 1792 return 682 * 3; /* 682x24 bits */ 1793 case 3: 1794 return 853 * 3; /* 853x24 bits */ 1795 case 4: 1796 return 1024 * 3; /* 1024x24 bits */ 1797 case 5: 1798 return 1194 * 3; /* 1194x24 bits */ 1799 case 6: 1800 return 1365 * 3; /* 1365x24 bits */ 1801 case 7: 1802 return 1920 * 3; /* 1920x24 bits */ 1803 default: 1804 BUG(); 1805 return 0; 1806 } 1807 } 1808 1809 static int dsi_set_lane_config(struct platform_device *dsidev) 1810 { 1811 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1812 static const u8 offsets[] = { 0, 4, 8, 12, 16 }; 1813 static const enum dsi_lane_function functions[] = { 1814 DSI_LANE_CLK, 1815 DSI_LANE_DATA1, 1816 DSI_LANE_DATA2, 1817 DSI_LANE_DATA3, 1818 DSI_LANE_DATA4, 1819 }; 1820 u32 r; 1821 int i; 1822 1823 r = dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG1); 1824 1825 for (i = 0; i < dsi->num_lanes_used; ++i) { 1826 unsigned offset = offsets[i]; 1827 unsigned polarity, lane_number; 1828 unsigned t; 1829 1830 for (t = 0; t < dsi->num_lanes_supported; ++t) 1831 if (dsi->lanes[t].function == functions[i]) 1832 break; 1833 1834 if (t == dsi->num_lanes_supported) 1835 return -EINVAL; 1836 1837 lane_number = t; 1838 polarity = dsi->lanes[t].polarity; 1839 1840 r = FLD_MOD(r, lane_number + 1, offset + 2, offset); 1841 r = FLD_MOD(r, polarity, offset + 3, offset + 3); 1842 } 1843 1844 /* clear the unused lanes */ 1845 for (; i < dsi->num_lanes_supported; ++i) { 1846 unsigned offset = offsets[i]; 1847 1848 r = FLD_MOD(r, 0, offset + 2, offset); 1849 r = FLD_MOD(r, 0, offset + 3, offset + 3); 1850 } 1851 1852 dsi_write_reg(dsidev, DSI_COMPLEXIO_CFG1, r); 1853 1854 return 0; 1855 } 1856 1857 static inline unsigned ns2ddr(struct platform_device *dsidev, unsigned ns) 1858 { 1859 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1860 1861 /* convert time in ns to ddr ticks, rounding up */ 1862 unsigned long ddr_clk = dsi->pll.cinfo.clkdco / 4; 1863 return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000; 1864 } 1865 1866 static inline unsigned ddr2ns(struct platform_device *dsidev, unsigned ddr) 1867 { 1868 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1869 1870 unsigned long ddr_clk = dsi->pll.cinfo.clkdco / 4; 1871 return ddr * 1000 * 1000 / (ddr_clk / 1000); 1872 } 1873 1874 static void dsi_cio_timings(struct platform_device *dsidev) 1875 { 1876 u32 r; 1877 u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit; 1878 u32 tlpx_half, tclk_trail, tclk_zero; 1879 u32 tclk_prepare; 1880 1881 /* calculate timings */ 1882 1883 /* 1 * DDR_CLK = 2 * UI */ 1884 1885 /* min 40ns + 4*UI max 85ns + 6*UI */ 1886 ths_prepare = ns2ddr(dsidev, 70) + 2; 1887 1888 /* min 145ns + 10*UI */ 1889 ths_prepare_ths_zero = ns2ddr(dsidev, 175) + 2; 1890 1891 /* min max(8*UI, 60ns+4*UI) */ 1892 ths_trail = ns2ddr(dsidev, 60) + 5; 1893 1894 /* min 100ns */ 1895 ths_exit = ns2ddr(dsidev, 145); 1896 1897 /* tlpx min 50n */ 1898 tlpx_half = ns2ddr(dsidev, 25); 1899 1900 /* min 60ns */ 1901 tclk_trail = ns2ddr(dsidev, 60) + 2; 1902 1903 /* min 38ns, max 95ns */ 1904 tclk_prepare = ns2ddr(dsidev, 65); 1905 1906 /* min tclk-prepare + tclk-zero = 300ns */ 1907 tclk_zero = ns2ddr(dsidev, 260); 1908 1909 DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n", 1910 ths_prepare, ddr2ns(dsidev, ths_prepare), 1911 ths_prepare_ths_zero, ddr2ns(dsidev, ths_prepare_ths_zero)); 1912 DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n", 1913 ths_trail, ddr2ns(dsidev, ths_trail), 1914 ths_exit, ddr2ns(dsidev, ths_exit)); 1915 1916 DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), " 1917 "tclk_zero %u (%uns)\n", 1918 tlpx_half, ddr2ns(dsidev, tlpx_half), 1919 tclk_trail, ddr2ns(dsidev, tclk_trail), 1920 tclk_zero, ddr2ns(dsidev, tclk_zero)); 1921 DSSDBG("tclk_prepare %u (%uns)\n", 1922 tclk_prepare, ddr2ns(dsidev, tclk_prepare)); 1923 1924 /* program timings */ 1925 1926 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG0); 1927 r = FLD_MOD(r, ths_prepare, 31, 24); 1928 r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16); 1929 r = FLD_MOD(r, ths_trail, 15, 8); 1930 r = FLD_MOD(r, ths_exit, 7, 0); 1931 dsi_write_reg(dsidev, DSI_DSIPHY_CFG0, r); 1932 1933 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG1); 1934 r = FLD_MOD(r, tlpx_half, 20, 16); 1935 r = FLD_MOD(r, tclk_trail, 15, 8); 1936 r = FLD_MOD(r, tclk_zero, 7, 0); 1937 1938 if (dss_has_feature(FEAT_DSI_PHY_DCC)) { 1939 r = FLD_MOD(r, 0, 21, 21); /* DCCEN = disable */ 1940 r = FLD_MOD(r, 1, 22, 22); /* CLKINP_DIVBY2EN = enable */ 1941 r = FLD_MOD(r, 1, 23, 23); /* CLKINP_SEL = enable */ 1942 } 1943 1944 dsi_write_reg(dsidev, DSI_DSIPHY_CFG1, r); 1945 1946 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG2); 1947 r = FLD_MOD(r, tclk_prepare, 7, 0); 1948 dsi_write_reg(dsidev, DSI_DSIPHY_CFG2, r); 1949 } 1950 1951 /* lane masks have lane 0 at lsb. mask_p for positive lines, n for negative */ 1952 static void dsi_cio_enable_lane_override(struct platform_device *dsidev, 1953 unsigned mask_p, unsigned mask_n) 1954 { 1955 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 1956 int i; 1957 u32 l; 1958 u8 lptxscp_start = dsi->num_lanes_supported == 3 ? 22 : 26; 1959 1960 l = 0; 1961 1962 for (i = 0; i < dsi->num_lanes_supported; ++i) { 1963 unsigned p = dsi->lanes[i].polarity; 1964 1965 if (mask_p & (1 << i)) 1966 l |= 1 << (i * 2 + (p ? 0 : 1)); 1967 1968 if (mask_n & (1 << i)) 1969 l |= 1 << (i * 2 + (p ? 1 : 0)); 1970 } 1971 1972 /* 1973 * Bits in REGLPTXSCPDAT4TO0DXDY: 1974 * 17: DY0 18: DX0 1975 * 19: DY1 20: DX1 1976 * 21: DY2 22: DX2 1977 * 23: DY3 24: DX3 1978 * 25: DY4 26: DX4 1979 */ 1980 1981 /* Set the lane override configuration */ 1982 1983 /* REGLPTXSCPDAT4TO0DXDY */ 1984 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, l, lptxscp_start, 17); 1985 1986 /* Enable lane override */ 1987 1988 /* ENLPTXSCPDAT */ 1989 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, 1, 27, 27); 1990 } 1991 1992 static void dsi_cio_disable_lane_override(struct platform_device *dsidev) 1993 { 1994 /* Disable lane override */ 1995 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, 0, 27, 27); /* ENLPTXSCPDAT */ 1996 /* Reset the lane override configuration */ 1997 /* REGLPTXSCPDAT4TO0DXDY */ 1998 REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, 0, 22, 17); 1999 } 2000 2001 static int dsi_cio_wait_tx_clk_esc_reset(struct platform_device *dsidev) 2002 { 2003 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2004 int t, i; 2005 bool in_use[DSI_MAX_NR_LANES]; 2006 static const u8 offsets_old[] = { 28, 27, 26 }; 2007 static const u8 offsets_new[] = { 24, 25, 26, 27, 28 }; 2008 const u8 *offsets; 2009 2010 if (dss_has_feature(FEAT_DSI_REVERSE_TXCLKESC)) 2011 offsets = offsets_old; 2012 else 2013 offsets = offsets_new; 2014 2015 for (i = 0; i < dsi->num_lanes_supported; ++i) 2016 in_use[i] = dsi->lanes[i].function != DSI_LANE_UNUSED; 2017 2018 t = 100000; 2019 while (true) { 2020 u32 l; 2021 int ok; 2022 2023 l = dsi_read_reg(dsidev, DSI_DSIPHY_CFG5); 2024 2025 ok = 0; 2026 for (i = 0; i < dsi->num_lanes_supported; ++i) { 2027 if (!in_use[i] || (l & (1 << offsets[i]))) 2028 ok++; 2029 } 2030 2031 if (ok == dsi->num_lanes_supported) 2032 break; 2033 2034 if (--t == 0) { 2035 for (i = 0; i < dsi->num_lanes_supported; ++i) { 2036 if (!in_use[i] || (l & (1 << offsets[i]))) 2037 continue; 2038 2039 DSSERR("CIO TXCLKESC%d domain not coming " \ 2040 "out of reset\n", i); 2041 } 2042 return -EIO; 2043 } 2044 } 2045 2046 return 0; 2047 } 2048 2049 /* return bitmask of enabled lanes, lane0 being the lsb */ 2050 static unsigned dsi_get_lane_mask(struct platform_device *dsidev) 2051 { 2052 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2053 unsigned mask = 0; 2054 int i; 2055 2056 for (i = 0; i < dsi->num_lanes_supported; ++i) { 2057 if (dsi->lanes[i].function != DSI_LANE_UNUSED) 2058 mask |= 1 << i; 2059 } 2060 2061 return mask; 2062 } 2063 2064 static int dsi_cio_init(struct platform_device *dsidev) 2065 { 2066 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2067 int r; 2068 u32 l; 2069 2070 DSSDBG("DSI CIO init starts"); 2071 2072 r = dss_dsi_enable_pads(dsi->module_id, dsi_get_lane_mask(dsidev)); 2073 if (r) 2074 return r; 2075 2076 dsi_enable_scp_clk(dsidev); 2077 2078 /* A dummy read using the SCP interface to any DSIPHY register is 2079 * required after DSIPHY reset to complete the reset of the DSI complex 2080 * I/O. */ 2081 dsi_read_reg(dsidev, DSI_DSIPHY_CFG5); 2082 2083 if (wait_for_bit_change(dsidev, DSI_DSIPHY_CFG5, 30, 1) != 1) { 2084 DSSERR("CIO SCP Clock domain not coming out of reset.\n"); 2085 r = -EIO; 2086 goto err_scp_clk_dom; 2087 } 2088 2089 r = dsi_set_lane_config(dsidev); 2090 if (r) 2091 goto err_scp_clk_dom; 2092 2093 /* set TX STOP MODE timer to maximum for this operation */ 2094 l = dsi_read_reg(dsidev, DSI_TIMING1); 2095 l = FLD_MOD(l, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */ 2096 l = FLD_MOD(l, 1, 14, 14); /* STOP_STATE_X16_IO */ 2097 l = FLD_MOD(l, 1, 13, 13); /* STOP_STATE_X4_IO */ 2098 l = FLD_MOD(l, 0x1fff, 12, 0); /* STOP_STATE_COUNTER_IO */ 2099 dsi_write_reg(dsidev, DSI_TIMING1, l); 2100 2101 if (dsi->ulps_enabled) { 2102 unsigned mask_p; 2103 int i; 2104 2105 DSSDBG("manual ulps exit\n"); 2106 2107 /* ULPS is exited by Mark-1 state for 1ms, followed by 2108 * stop state. DSS HW cannot do this via the normal 2109 * ULPS exit sequence, as after reset the DSS HW thinks 2110 * that we are not in ULPS mode, and refuses to send the 2111 * sequence. So we need to send the ULPS exit sequence 2112 * manually by setting positive lines high and negative lines 2113 * low for 1ms. 2114 */ 2115 2116 mask_p = 0; 2117 2118 for (i = 0; i < dsi->num_lanes_supported; ++i) { 2119 if (dsi->lanes[i].function == DSI_LANE_UNUSED) 2120 continue; 2121 mask_p |= 1 << i; 2122 } 2123 2124 dsi_cio_enable_lane_override(dsidev, mask_p, 0); 2125 } 2126 2127 r = dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ON); 2128 if (r) 2129 goto err_cio_pwr; 2130 2131 if (wait_for_bit_change(dsidev, DSI_COMPLEXIO_CFG1, 29, 1) != 1) { 2132 DSSERR("CIO PWR clock domain not coming out of reset.\n"); 2133 r = -ENODEV; 2134 goto err_cio_pwr_dom; 2135 } 2136 2137 dsi_if_enable(dsidev, true); 2138 dsi_if_enable(dsidev, false); 2139 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */ 2140 2141 r = dsi_cio_wait_tx_clk_esc_reset(dsidev); 2142 if (r) 2143 goto err_tx_clk_esc_rst; 2144 2145 if (dsi->ulps_enabled) { 2146 /* Keep Mark-1 state for 1ms (as per DSI spec) */ 2147 ktime_t wait = ns_to_ktime(1000 * 1000); 2148 set_current_state(TASK_UNINTERRUPTIBLE); 2149 schedule_hrtimeout(&wait, HRTIMER_MODE_REL); 2150 2151 /* Disable the override. The lanes should be set to Mark-11 2152 * state by the HW */ 2153 dsi_cio_disable_lane_override(dsidev); 2154 } 2155 2156 /* FORCE_TX_STOP_MODE_IO */ 2157 REG_FLD_MOD(dsidev, DSI_TIMING1, 0, 15, 15); 2158 2159 dsi_cio_timings(dsidev); 2160 2161 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) { 2162 /* DDR_CLK_ALWAYS_ON */ 2163 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 2164 dsi->vm_timings.ddr_clk_always_on, 13, 13); 2165 } 2166 2167 dsi->ulps_enabled = false; 2168 2169 DSSDBG("CIO init done\n"); 2170 2171 return 0; 2172 2173 err_tx_clk_esc_rst: 2174 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 20, 20); /* LP_CLK_ENABLE */ 2175 err_cio_pwr_dom: 2176 dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_OFF); 2177 err_cio_pwr: 2178 if (dsi->ulps_enabled) 2179 dsi_cio_disable_lane_override(dsidev); 2180 err_scp_clk_dom: 2181 dsi_disable_scp_clk(dsidev); 2182 dss_dsi_disable_pads(dsi->module_id, dsi_get_lane_mask(dsidev)); 2183 return r; 2184 } 2185 2186 static void dsi_cio_uninit(struct platform_device *dsidev) 2187 { 2188 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2189 2190 /* DDR_CLK_ALWAYS_ON */ 2191 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 13, 13); 2192 2193 dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_OFF); 2194 dsi_disable_scp_clk(dsidev); 2195 dss_dsi_disable_pads(dsi->module_id, dsi_get_lane_mask(dsidev)); 2196 } 2197 2198 static void dsi_config_tx_fifo(struct platform_device *dsidev, 2199 enum fifo_size size1, enum fifo_size size2, 2200 enum fifo_size size3, enum fifo_size size4) 2201 { 2202 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2203 u32 r = 0; 2204 int add = 0; 2205 int i; 2206 2207 dsi->vc[0].tx_fifo_size = size1; 2208 dsi->vc[1].tx_fifo_size = size2; 2209 dsi->vc[2].tx_fifo_size = size3; 2210 dsi->vc[3].tx_fifo_size = size4; 2211 2212 for (i = 0; i < 4; i++) { 2213 u8 v; 2214 int size = dsi->vc[i].tx_fifo_size; 2215 2216 if (add + size > 4) { 2217 DSSERR("Illegal FIFO configuration\n"); 2218 BUG(); 2219 return; 2220 } 2221 2222 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4); 2223 r |= v << (8 * i); 2224 /*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */ 2225 add += size; 2226 } 2227 2228 dsi_write_reg(dsidev, DSI_TX_FIFO_VC_SIZE, r); 2229 } 2230 2231 static void dsi_config_rx_fifo(struct platform_device *dsidev, 2232 enum fifo_size size1, enum fifo_size size2, 2233 enum fifo_size size3, enum fifo_size size4) 2234 { 2235 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2236 u32 r = 0; 2237 int add = 0; 2238 int i; 2239 2240 dsi->vc[0].rx_fifo_size = size1; 2241 dsi->vc[1].rx_fifo_size = size2; 2242 dsi->vc[2].rx_fifo_size = size3; 2243 dsi->vc[3].rx_fifo_size = size4; 2244 2245 for (i = 0; i < 4; i++) { 2246 u8 v; 2247 int size = dsi->vc[i].rx_fifo_size; 2248 2249 if (add + size > 4) { 2250 DSSERR("Illegal FIFO configuration\n"); 2251 BUG(); 2252 return; 2253 } 2254 2255 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4); 2256 r |= v << (8 * i); 2257 /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */ 2258 add += size; 2259 } 2260 2261 dsi_write_reg(dsidev, DSI_RX_FIFO_VC_SIZE, r); 2262 } 2263 2264 static int dsi_force_tx_stop_mode_io(struct platform_device *dsidev) 2265 { 2266 u32 r; 2267 2268 r = dsi_read_reg(dsidev, DSI_TIMING1); 2269 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */ 2270 dsi_write_reg(dsidev, DSI_TIMING1, r); 2271 2272 if (wait_for_bit_change(dsidev, DSI_TIMING1, 15, 0) != 0) { 2273 DSSERR("TX_STOP bit not going down\n"); 2274 return -EIO; 2275 } 2276 2277 return 0; 2278 } 2279 2280 static bool dsi_vc_is_enabled(struct platform_device *dsidev, int channel) 2281 { 2282 return REG_GET(dsidev, DSI_VC_CTRL(channel), 0, 0); 2283 } 2284 2285 static void dsi_packet_sent_handler_vp(void *data, u32 mask) 2286 { 2287 struct dsi_packet_sent_handler_data *vp_data = 2288 (struct dsi_packet_sent_handler_data *) data; 2289 struct dsi_data *dsi = dsi_get_dsidrv_data(vp_data->dsidev); 2290 const int channel = dsi->update_channel; 2291 u8 bit = dsi->te_enabled ? 30 : 31; 2292 2293 if (REG_GET(vp_data->dsidev, DSI_VC_TE(channel), bit, bit) == 0) 2294 complete(vp_data->completion); 2295 } 2296 2297 static int dsi_sync_vc_vp(struct platform_device *dsidev, int channel) 2298 { 2299 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2300 DECLARE_COMPLETION_ONSTACK(completion); 2301 struct dsi_packet_sent_handler_data vp_data = { 2302 .dsidev = dsidev, 2303 .completion = &completion 2304 }; 2305 int r = 0; 2306 u8 bit; 2307 2308 bit = dsi->te_enabled ? 30 : 31; 2309 2310 r = dsi_register_isr_vc(dsidev, channel, dsi_packet_sent_handler_vp, 2311 &vp_data, DSI_VC_IRQ_PACKET_SENT); 2312 if (r) 2313 goto err0; 2314 2315 /* Wait for completion only if TE_EN/TE_START is still set */ 2316 if (REG_GET(dsidev, DSI_VC_TE(channel), bit, bit)) { 2317 if (wait_for_completion_timeout(&completion, 2318 msecs_to_jiffies(10)) == 0) { 2319 DSSERR("Failed to complete previous frame transfer\n"); 2320 r = -EIO; 2321 goto err1; 2322 } 2323 } 2324 2325 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_vp, 2326 &vp_data, DSI_VC_IRQ_PACKET_SENT); 2327 2328 return 0; 2329 err1: 2330 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_vp, 2331 &vp_data, DSI_VC_IRQ_PACKET_SENT); 2332 err0: 2333 return r; 2334 } 2335 2336 static void dsi_packet_sent_handler_l4(void *data, u32 mask) 2337 { 2338 struct dsi_packet_sent_handler_data *l4_data = 2339 (struct dsi_packet_sent_handler_data *) data; 2340 struct dsi_data *dsi = dsi_get_dsidrv_data(l4_data->dsidev); 2341 const int channel = dsi->update_channel; 2342 2343 if (REG_GET(l4_data->dsidev, DSI_VC_CTRL(channel), 5, 5) == 0) 2344 complete(l4_data->completion); 2345 } 2346 2347 static int dsi_sync_vc_l4(struct platform_device *dsidev, int channel) 2348 { 2349 DECLARE_COMPLETION_ONSTACK(completion); 2350 struct dsi_packet_sent_handler_data l4_data = { 2351 .dsidev = dsidev, 2352 .completion = &completion 2353 }; 2354 int r = 0; 2355 2356 r = dsi_register_isr_vc(dsidev, channel, dsi_packet_sent_handler_l4, 2357 &l4_data, DSI_VC_IRQ_PACKET_SENT); 2358 if (r) 2359 goto err0; 2360 2361 /* Wait for completion only if TX_FIFO_NOT_EMPTY is still set */ 2362 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 5, 5)) { 2363 if (wait_for_completion_timeout(&completion, 2364 msecs_to_jiffies(10)) == 0) { 2365 DSSERR("Failed to complete previous l4 transfer\n"); 2366 r = -EIO; 2367 goto err1; 2368 } 2369 } 2370 2371 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_l4, 2372 &l4_data, DSI_VC_IRQ_PACKET_SENT); 2373 2374 return 0; 2375 err1: 2376 dsi_unregister_isr_vc(dsidev, channel, dsi_packet_sent_handler_l4, 2377 &l4_data, DSI_VC_IRQ_PACKET_SENT); 2378 err0: 2379 return r; 2380 } 2381 2382 static int dsi_sync_vc(struct platform_device *dsidev, int channel) 2383 { 2384 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2385 2386 WARN_ON(!dsi_bus_is_locked(dsidev)); 2387 2388 WARN_ON(in_interrupt()); 2389 2390 if (!dsi_vc_is_enabled(dsidev, channel)) 2391 return 0; 2392 2393 switch (dsi->vc[channel].source) { 2394 case DSI_VC_SOURCE_VP: 2395 return dsi_sync_vc_vp(dsidev, channel); 2396 case DSI_VC_SOURCE_L4: 2397 return dsi_sync_vc_l4(dsidev, channel); 2398 default: 2399 BUG(); 2400 return -EINVAL; 2401 } 2402 } 2403 2404 static int dsi_vc_enable(struct platform_device *dsidev, int channel, 2405 bool enable) 2406 { 2407 DSSDBG("dsi_vc_enable channel %d, enable %d\n", 2408 channel, enable); 2409 2410 enable = enable ? 1 : 0; 2411 2412 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), enable, 0, 0); 2413 2414 if (wait_for_bit_change(dsidev, DSI_VC_CTRL(channel), 2415 0, enable) != enable) { 2416 DSSERR("Failed to set dsi_vc_enable to %d\n", enable); 2417 return -EIO; 2418 } 2419 2420 return 0; 2421 } 2422 2423 static void dsi_vc_initial_config(struct platform_device *dsidev, int channel) 2424 { 2425 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2426 u32 r; 2427 2428 DSSDBG("Initial config of virtual channel %d", channel); 2429 2430 r = dsi_read_reg(dsidev, DSI_VC_CTRL(channel)); 2431 2432 if (FLD_GET(r, 15, 15)) /* VC_BUSY */ 2433 DSSERR("VC(%d) busy when trying to configure it!\n", 2434 channel); 2435 2436 r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */ 2437 r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */ 2438 r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */ 2439 r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */ 2440 r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */ 2441 r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */ 2442 r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */ 2443 if (dss_has_feature(FEAT_DSI_VC_OCP_WIDTH)) 2444 r = FLD_MOD(r, 3, 11, 10); /* OCP_WIDTH = 32 bit */ 2445 2446 r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */ 2447 r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */ 2448 2449 dsi_write_reg(dsidev, DSI_VC_CTRL(channel), r); 2450 2451 dsi->vc[channel].source = DSI_VC_SOURCE_L4; 2452 } 2453 2454 static int dsi_vc_config_source(struct platform_device *dsidev, int channel, 2455 enum dsi_vc_source source) 2456 { 2457 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2458 2459 if (dsi->vc[channel].source == source) 2460 return 0; 2461 2462 DSSDBG("Source config of virtual channel %d", channel); 2463 2464 dsi_sync_vc(dsidev, channel); 2465 2466 dsi_vc_enable(dsidev, channel, 0); 2467 2468 /* VC_BUSY */ 2469 if (wait_for_bit_change(dsidev, DSI_VC_CTRL(channel), 15, 0) != 0) { 2470 DSSERR("vc(%d) busy when trying to config for VP\n", channel); 2471 return -EIO; 2472 } 2473 2474 /* SOURCE, 0 = L4, 1 = video port */ 2475 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), source, 1, 1); 2476 2477 /* DCS_CMD_ENABLE */ 2478 if (dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC)) { 2479 bool enable = source == DSI_VC_SOURCE_VP; 2480 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), enable, 30, 30); 2481 } 2482 2483 dsi_vc_enable(dsidev, channel, 1); 2484 2485 dsi->vc[channel].source = source; 2486 2487 return 0; 2488 } 2489 2490 static void dsi_vc_enable_hs(struct omap_dss_device *dssdev, int channel, 2491 bool enable) 2492 { 2493 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 2494 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2495 2496 DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable); 2497 2498 WARN_ON(!dsi_bus_is_locked(dsidev)); 2499 2500 dsi_vc_enable(dsidev, channel, 0); 2501 dsi_if_enable(dsidev, 0); 2502 2503 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), enable, 9, 9); 2504 2505 dsi_vc_enable(dsidev, channel, 1); 2506 dsi_if_enable(dsidev, 1); 2507 2508 dsi_force_tx_stop_mode_io(dsidev); 2509 2510 /* start the DDR clock by sending a NULL packet */ 2511 if (dsi->vm_timings.ddr_clk_always_on && enable) 2512 dsi_vc_send_null(dssdev, channel); 2513 } 2514 2515 static void dsi_vc_flush_long_data(struct platform_device *dsidev, int channel) 2516 { 2517 while (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) { 2518 u32 val; 2519 val = dsi_read_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel)); 2520 DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n", 2521 (val >> 0) & 0xff, 2522 (val >> 8) & 0xff, 2523 (val >> 16) & 0xff, 2524 (val >> 24) & 0xff); 2525 } 2526 } 2527 2528 static void dsi_show_rx_ack_with_err(u16 err) 2529 { 2530 DSSERR("\tACK with ERROR (%#x):\n", err); 2531 if (err & (1 << 0)) 2532 DSSERR("\t\tSoT Error\n"); 2533 if (err & (1 << 1)) 2534 DSSERR("\t\tSoT Sync Error\n"); 2535 if (err & (1 << 2)) 2536 DSSERR("\t\tEoT Sync Error\n"); 2537 if (err & (1 << 3)) 2538 DSSERR("\t\tEscape Mode Entry Command Error\n"); 2539 if (err & (1 << 4)) 2540 DSSERR("\t\tLP Transmit Sync Error\n"); 2541 if (err & (1 << 5)) 2542 DSSERR("\t\tHS Receive Timeout Error\n"); 2543 if (err & (1 << 6)) 2544 DSSERR("\t\tFalse Control Error\n"); 2545 if (err & (1 << 7)) 2546 DSSERR("\t\t(reserved7)\n"); 2547 if (err & (1 << 8)) 2548 DSSERR("\t\tECC Error, single-bit (corrected)\n"); 2549 if (err & (1 << 9)) 2550 DSSERR("\t\tECC Error, multi-bit (not corrected)\n"); 2551 if (err & (1 << 10)) 2552 DSSERR("\t\tChecksum Error\n"); 2553 if (err & (1 << 11)) 2554 DSSERR("\t\tData type not recognized\n"); 2555 if (err & (1 << 12)) 2556 DSSERR("\t\tInvalid VC ID\n"); 2557 if (err & (1 << 13)) 2558 DSSERR("\t\tInvalid Transmission Length\n"); 2559 if (err & (1 << 14)) 2560 DSSERR("\t\t(reserved14)\n"); 2561 if (err & (1 << 15)) 2562 DSSERR("\t\tDSI Protocol Violation\n"); 2563 } 2564 2565 static u16 dsi_vc_flush_receive_data(struct platform_device *dsidev, 2566 int channel) 2567 { 2568 /* RX_FIFO_NOT_EMPTY */ 2569 while (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) { 2570 u32 val; 2571 u8 dt; 2572 val = dsi_read_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel)); 2573 DSSERR("\trawval %#08x\n", val); 2574 dt = FLD_GET(val, 5, 0); 2575 if (dt == MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT) { 2576 u16 err = FLD_GET(val, 23, 8); 2577 dsi_show_rx_ack_with_err(err); 2578 } else if (dt == MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE) { 2579 DSSERR("\tDCS short response, 1 byte: %#x\n", 2580 FLD_GET(val, 23, 8)); 2581 } else if (dt == MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE) { 2582 DSSERR("\tDCS short response, 2 byte: %#x\n", 2583 FLD_GET(val, 23, 8)); 2584 } else if (dt == MIPI_DSI_RX_DCS_LONG_READ_RESPONSE) { 2585 DSSERR("\tDCS long response, len %d\n", 2586 FLD_GET(val, 23, 8)); 2587 dsi_vc_flush_long_data(dsidev, channel); 2588 } else { 2589 DSSERR("\tunknown datatype 0x%02x\n", dt); 2590 } 2591 } 2592 return 0; 2593 } 2594 2595 static int dsi_vc_send_bta(struct platform_device *dsidev, int channel) 2596 { 2597 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2598 2599 if (dsi->debug_write || dsi->debug_read) 2600 DSSDBG("dsi_vc_send_bta %d\n", channel); 2601 2602 WARN_ON(!dsi_bus_is_locked(dsidev)); 2603 2604 /* RX_FIFO_NOT_EMPTY */ 2605 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) { 2606 DSSERR("rx fifo not empty when sending BTA, dumping data:\n"); 2607 dsi_vc_flush_receive_data(dsidev, channel); 2608 } 2609 2610 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */ 2611 2612 /* flush posted write */ 2613 dsi_read_reg(dsidev, DSI_VC_CTRL(channel)); 2614 2615 return 0; 2616 } 2617 2618 static int dsi_vc_send_bta_sync(struct omap_dss_device *dssdev, int channel) 2619 { 2620 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 2621 DECLARE_COMPLETION_ONSTACK(completion); 2622 int r = 0; 2623 u32 err; 2624 2625 r = dsi_register_isr_vc(dsidev, channel, dsi_completion_handler, 2626 &completion, DSI_VC_IRQ_BTA); 2627 if (r) 2628 goto err0; 2629 2630 r = dsi_register_isr(dsidev, dsi_completion_handler, &completion, 2631 DSI_IRQ_ERROR_MASK); 2632 if (r) 2633 goto err1; 2634 2635 r = dsi_vc_send_bta(dsidev, channel); 2636 if (r) 2637 goto err2; 2638 2639 if (wait_for_completion_timeout(&completion, 2640 msecs_to_jiffies(500)) == 0) { 2641 DSSERR("Failed to receive BTA\n"); 2642 r = -EIO; 2643 goto err2; 2644 } 2645 2646 err = dsi_get_errors(dsidev); 2647 if (err) { 2648 DSSERR("Error while sending BTA: %x\n", err); 2649 r = -EIO; 2650 goto err2; 2651 } 2652 err2: 2653 dsi_unregister_isr(dsidev, dsi_completion_handler, &completion, 2654 DSI_IRQ_ERROR_MASK); 2655 err1: 2656 dsi_unregister_isr_vc(dsidev, channel, dsi_completion_handler, 2657 &completion, DSI_VC_IRQ_BTA); 2658 err0: 2659 return r; 2660 } 2661 2662 static inline void dsi_vc_write_long_header(struct platform_device *dsidev, 2663 int channel, u8 data_type, u16 len, u8 ecc) 2664 { 2665 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2666 u32 val; 2667 u8 data_id; 2668 2669 WARN_ON(!dsi_bus_is_locked(dsidev)); 2670 2671 data_id = data_type | dsi->vc[channel].vc_id << 6; 2672 2673 val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) | 2674 FLD_VAL(ecc, 31, 24); 2675 2676 dsi_write_reg(dsidev, DSI_VC_LONG_PACKET_HEADER(channel), val); 2677 } 2678 2679 static inline void dsi_vc_write_long_payload(struct platform_device *dsidev, 2680 int channel, u8 b1, u8 b2, u8 b3, u8 b4) 2681 { 2682 u32 val; 2683 2684 val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0; 2685 2686 /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n", 2687 b1, b2, b3, b4, val); */ 2688 2689 dsi_write_reg(dsidev, DSI_VC_LONG_PACKET_PAYLOAD(channel), val); 2690 } 2691 2692 static int dsi_vc_send_long(struct platform_device *dsidev, int channel, 2693 u8 data_type, u8 *data, u16 len, u8 ecc) 2694 { 2695 /*u32 val; */ 2696 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2697 int i; 2698 u8 *p; 2699 int r = 0; 2700 u8 b1, b2, b3, b4; 2701 2702 if (dsi->debug_write) 2703 DSSDBG("dsi_vc_send_long, %d bytes\n", len); 2704 2705 /* len + header */ 2706 if (dsi->vc[channel].tx_fifo_size * 32 * 4 < len + 4) { 2707 DSSERR("unable to send long packet: packet too long.\n"); 2708 return -EINVAL; 2709 } 2710 2711 dsi_vc_config_source(dsidev, channel, DSI_VC_SOURCE_L4); 2712 2713 dsi_vc_write_long_header(dsidev, channel, data_type, len, ecc); 2714 2715 p = data; 2716 for (i = 0; i < len >> 2; i++) { 2717 if (dsi->debug_write) 2718 DSSDBG("\tsending full packet %d\n", i); 2719 2720 b1 = *p++; 2721 b2 = *p++; 2722 b3 = *p++; 2723 b4 = *p++; 2724 2725 dsi_vc_write_long_payload(dsidev, channel, b1, b2, b3, b4); 2726 } 2727 2728 i = len % 4; 2729 if (i) { 2730 b1 = 0; b2 = 0; b3 = 0; 2731 2732 if (dsi->debug_write) 2733 DSSDBG("\tsending remainder bytes %d\n", i); 2734 2735 switch (i) { 2736 case 3: 2737 b1 = *p++; 2738 b2 = *p++; 2739 b3 = *p++; 2740 break; 2741 case 2: 2742 b1 = *p++; 2743 b2 = *p++; 2744 break; 2745 case 1: 2746 b1 = *p++; 2747 break; 2748 } 2749 2750 dsi_vc_write_long_payload(dsidev, channel, b1, b2, b3, 0); 2751 } 2752 2753 return r; 2754 } 2755 2756 static int dsi_vc_send_short(struct platform_device *dsidev, int channel, 2757 u8 data_type, u16 data, u8 ecc) 2758 { 2759 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2760 u32 r; 2761 u8 data_id; 2762 2763 WARN_ON(!dsi_bus_is_locked(dsidev)); 2764 2765 if (dsi->debug_write) 2766 DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n", 2767 channel, 2768 data_type, data & 0xff, (data >> 8) & 0xff); 2769 2770 dsi_vc_config_source(dsidev, channel, DSI_VC_SOURCE_L4); 2771 2772 if (FLD_GET(dsi_read_reg(dsidev, DSI_VC_CTRL(channel)), 16, 16)) { 2773 DSSERR("ERROR FIFO FULL, aborting transfer\n"); 2774 return -EINVAL; 2775 } 2776 2777 data_id = data_type | dsi->vc[channel].vc_id << 6; 2778 2779 r = (data_id << 0) | (data << 8) | (ecc << 24); 2780 2781 dsi_write_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel), r); 2782 2783 return 0; 2784 } 2785 2786 static int dsi_vc_send_null(struct omap_dss_device *dssdev, int channel) 2787 { 2788 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 2789 2790 return dsi_vc_send_long(dsidev, channel, MIPI_DSI_NULL_PACKET, NULL, 2791 0, 0); 2792 } 2793 2794 static int dsi_vc_write_nosync_common(struct platform_device *dsidev, 2795 int channel, u8 *data, int len, enum dss_dsi_content_type type) 2796 { 2797 int r; 2798 2799 if (len == 0) { 2800 BUG_ON(type == DSS_DSI_CONTENT_DCS); 2801 r = dsi_vc_send_short(dsidev, channel, 2802 MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM, 0, 0); 2803 } else if (len == 1) { 2804 r = dsi_vc_send_short(dsidev, channel, 2805 type == DSS_DSI_CONTENT_GENERIC ? 2806 MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM : 2807 MIPI_DSI_DCS_SHORT_WRITE, data[0], 0); 2808 } else if (len == 2) { 2809 r = dsi_vc_send_short(dsidev, channel, 2810 type == DSS_DSI_CONTENT_GENERIC ? 2811 MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM : 2812 MIPI_DSI_DCS_SHORT_WRITE_PARAM, 2813 data[0] | (data[1] << 8), 0); 2814 } else { 2815 r = dsi_vc_send_long(dsidev, channel, 2816 type == DSS_DSI_CONTENT_GENERIC ? 2817 MIPI_DSI_GENERIC_LONG_WRITE : 2818 MIPI_DSI_DCS_LONG_WRITE, data, len, 0); 2819 } 2820 2821 return r; 2822 } 2823 2824 static int dsi_vc_dcs_write_nosync(struct omap_dss_device *dssdev, int channel, 2825 u8 *data, int len) 2826 { 2827 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 2828 2829 return dsi_vc_write_nosync_common(dsidev, channel, data, len, 2830 DSS_DSI_CONTENT_DCS); 2831 } 2832 2833 static int dsi_vc_generic_write_nosync(struct omap_dss_device *dssdev, int channel, 2834 u8 *data, int len) 2835 { 2836 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 2837 2838 return dsi_vc_write_nosync_common(dsidev, channel, data, len, 2839 DSS_DSI_CONTENT_GENERIC); 2840 } 2841 2842 static int dsi_vc_write_common(struct omap_dss_device *dssdev, int channel, 2843 u8 *data, int len, enum dss_dsi_content_type type) 2844 { 2845 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 2846 int r; 2847 2848 r = dsi_vc_write_nosync_common(dsidev, channel, data, len, type); 2849 if (r) 2850 goto err; 2851 2852 r = dsi_vc_send_bta_sync(dssdev, channel); 2853 if (r) 2854 goto err; 2855 2856 /* RX_FIFO_NOT_EMPTY */ 2857 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20)) { 2858 DSSERR("rx fifo not empty after write, dumping data:\n"); 2859 dsi_vc_flush_receive_data(dsidev, channel); 2860 r = -EIO; 2861 goto err; 2862 } 2863 2864 return 0; 2865 err: 2866 DSSERR("dsi_vc_write_common(ch %d, cmd 0x%02x, len %d) failed\n", 2867 channel, data[0], len); 2868 return r; 2869 } 2870 2871 static int dsi_vc_dcs_write(struct omap_dss_device *dssdev, int channel, u8 *data, 2872 int len) 2873 { 2874 return dsi_vc_write_common(dssdev, channel, data, len, 2875 DSS_DSI_CONTENT_DCS); 2876 } 2877 2878 static int dsi_vc_generic_write(struct omap_dss_device *dssdev, int channel, u8 *data, 2879 int len) 2880 { 2881 return dsi_vc_write_common(dssdev, channel, data, len, 2882 DSS_DSI_CONTENT_GENERIC); 2883 } 2884 2885 static int dsi_vc_dcs_send_read_request(struct platform_device *dsidev, 2886 int channel, u8 dcs_cmd) 2887 { 2888 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2889 int r; 2890 2891 if (dsi->debug_read) 2892 DSSDBG("dsi_vc_dcs_send_read_request(ch%d, dcs_cmd %x)\n", 2893 channel, dcs_cmd); 2894 2895 r = dsi_vc_send_short(dsidev, channel, MIPI_DSI_DCS_READ, dcs_cmd, 0); 2896 if (r) { 2897 DSSERR("dsi_vc_dcs_send_read_request(ch %d, cmd 0x%02x)" 2898 " failed\n", channel, dcs_cmd); 2899 return r; 2900 } 2901 2902 return 0; 2903 } 2904 2905 static int dsi_vc_generic_send_read_request(struct platform_device *dsidev, 2906 int channel, u8 *reqdata, int reqlen) 2907 { 2908 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2909 u16 data; 2910 u8 data_type; 2911 int r; 2912 2913 if (dsi->debug_read) 2914 DSSDBG("dsi_vc_generic_send_read_request(ch %d, reqlen %d)\n", 2915 channel, reqlen); 2916 2917 if (reqlen == 0) { 2918 data_type = MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM; 2919 data = 0; 2920 } else if (reqlen == 1) { 2921 data_type = MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM; 2922 data = reqdata[0]; 2923 } else if (reqlen == 2) { 2924 data_type = MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM; 2925 data = reqdata[0] | (reqdata[1] << 8); 2926 } else { 2927 BUG(); 2928 return -EINVAL; 2929 } 2930 2931 r = dsi_vc_send_short(dsidev, channel, data_type, data, 0); 2932 if (r) { 2933 DSSERR("dsi_vc_generic_send_read_request(ch %d, reqlen %d)" 2934 " failed\n", channel, reqlen); 2935 return r; 2936 } 2937 2938 return 0; 2939 } 2940 2941 static int dsi_vc_read_rx_fifo(struct platform_device *dsidev, int channel, 2942 u8 *buf, int buflen, enum dss_dsi_content_type type) 2943 { 2944 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 2945 u32 val; 2946 u8 dt; 2947 int r; 2948 2949 /* RX_FIFO_NOT_EMPTY */ 2950 if (REG_GET(dsidev, DSI_VC_CTRL(channel), 20, 20) == 0) { 2951 DSSERR("RX fifo empty when trying to read.\n"); 2952 r = -EIO; 2953 goto err; 2954 } 2955 2956 val = dsi_read_reg(dsidev, DSI_VC_SHORT_PACKET_HEADER(channel)); 2957 if (dsi->debug_read) 2958 DSSDBG("\theader: %08x\n", val); 2959 dt = FLD_GET(val, 5, 0); 2960 if (dt == MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT) { 2961 u16 err = FLD_GET(val, 23, 8); 2962 dsi_show_rx_ack_with_err(err); 2963 r = -EIO; 2964 goto err; 2965 2966 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ? 2967 MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE : 2968 MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE)) { 2969 u8 data = FLD_GET(val, 15, 8); 2970 if (dsi->debug_read) 2971 DSSDBG("\t%s short response, 1 byte: %02x\n", 2972 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" : 2973 "DCS", data); 2974 2975 if (buflen < 1) { 2976 r = -EIO; 2977 goto err; 2978 } 2979 2980 buf[0] = data; 2981 2982 return 1; 2983 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ? 2984 MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE : 2985 MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE)) { 2986 u16 data = FLD_GET(val, 23, 8); 2987 if (dsi->debug_read) 2988 DSSDBG("\t%s short response, 2 byte: %04x\n", 2989 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" : 2990 "DCS", data); 2991 2992 if (buflen < 2) { 2993 r = -EIO; 2994 goto err; 2995 } 2996 2997 buf[0] = data & 0xff; 2998 buf[1] = (data >> 8) & 0xff; 2999 3000 return 2; 3001 } else if (dt == (type == DSS_DSI_CONTENT_GENERIC ? 3002 MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE : 3003 MIPI_DSI_RX_DCS_LONG_READ_RESPONSE)) { 3004 int w; 3005 int len = FLD_GET(val, 23, 8); 3006 if (dsi->debug_read) 3007 DSSDBG("\t%s long response, len %d\n", 3008 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" : 3009 "DCS", len); 3010 3011 if (len > buflen) { 3012 r = -EIO; 3013 goto err; 3014 } 3015 3016 /* two byte checksum ends the packet, not included in len */ 3017 for (w = 0; w < len + 2;) { 3018 int b; 3019 val = dsi_read_reg(dsidev, 3020 DSI_VC_SHORT_PACKET_HEADER(channel)); 3021 if (dsi->debug_read) 3022 DSSDBG("\t\t%02x %02x %02x %02x\n", 3023 (val >> 0) & 0xff, 3024 (val >> 8) & 0xff, 3025 (val >> 16) & 0xff, 3026 (val >> 24) & 0xff); 3027 3028 for (b = 0; b < 4; ++b) { 3029 if (w < len) 3030 buf[w] = (val >> (b * 8)) & 0xff; 3031 /* we discard the 2 byte checksum */ 3032 ++w; 3033 } 3034 } 3035 3036 return len; 3037 } else { 3038 DSSERR("\tunknown datatype 0x%02x\n", dt); 3039 r = -EIO; 3040 goto err; 3041 } 3042 3043 err: 3044 DSSERR("dsi_vc_read_rx_fifo(ch %d type %s) failed\n", channel, 3045 type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" : "DCS"); 3046 3047 return r; 3048 } 3049 3050 static int dsi_vc_dcs_read(struct omap_dss_device *dssdev, int channel, u8 dcs_cmd, 3051 u8 *buf, int buflen) 3052 { 3053 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 3054 int r; 3055 3056 r = dsi_vc_dcs_send_read_request(dsidev, channel, dcs_cmd); 3057 if (r) 3058 goto err; 3059 3060 r = dsi_vc_send_bta_sync(dssdev, channel); 3061 if (r) 3062 goto err; 3063 3064 r = dsi_vc_read_rx_fifo(dsidev, channel, buf, buflen, 3065 DSS_DSI_CONTENT_DCS); 3066 if (r < 0) 3067 goto err; 3068 3069 if (r != buflen) { 3070 r = -EIO; 3071 goto err; 3072 } 3073 3074 return 0; 3075 err: 3076 DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n", channel, dcs_cmd); 3077 return r; 3078 } 3079 3080 static int dsi_vc_generic_read(struct omap_dss_device *dssdev, int channel, 3081 u8 *reqdata, int reqlen, u8 *buf, int buflen) 3082 { 3083 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 3084 int r; 3085 3086 r = dsi_vc_generic_send_read_request(dsidev, channel, reqdata, reqlen); 3087 if (r) 3088 return r; 3089 3090 r = dsi_vc_send_bta_sync(dssdev, channel); 3091 if (r) 3092 return r; 3093 3094 r = dsi_vc_read_rx_fifo(dsidev, channel, buf, buflen, 3095 DSS_DSI_CONTENT_GENERIC); 3096 if (r < 0) 3097 return r; 3098 3099 if (r != buflen) { 3100 r = -EIO; 3101 return r; 3102 } 3103 3104 return 0; 3105 } 3106 3107 static int dsi_vc_set_max_rx_packet_size(struct omap_dss_device *dssdev, int channel, 3108 u16 len) 3109 { 3110 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 3111 3112 return dsi_vc_send_short(dsidev, channel, 3113 MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, len, 0); 3114 } 3115 3116 static int dsi_enter_ulps(struct platform_device *dsidev) 3117 { 3118 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 3119 DECLARE_COMPLETION_ONSTACK(completion); 3120 int r, i; 3121 unsigned mask; 3122 3123 DSSDBG("Entering ULPS"); 3124 3125 WARN_ON(!dsi_bus_is_locked(dsidev)); 3126 3127 WARN_ON(dsi->ulps_enabled); 3128 3129 if (dsi->ulps_enabled) 3130 return 0; 3131 3132 /* DDR_CLK_ALWAYS_ON */ 3133 if (REG_GET(dsidev, DSI_CLK_CTRL, 13, 13)) { 3134 dsi_if_enable(dsidev, 0); 3135 REG_FLD_MOD(dsidev, DSI_CLK_CTRL, 0, 13, 13); 3136 dsi_if_enable(dsidev, 1); 3137 } 3138 3139 dsi_sync_vc(dsidev, 0); 3140 dsi_sync_vc(dsidev, 1); 3141 dsi_sync_vc(dsidev, 2); 3142 dsi_sync_vc(dsidev, 3); 3143 3144 dsi_force_tx_stop_mode_io(dsidev); 3145 3146 dsi_vc_enable(dsidev, 0, false); 3147 dsi_vc_enable(dsidev, 1, false); 3148 dsi_vc_enable(dsidev, 2, false); 3149 dsi_vc_enable(dsidev, 3, false); 3150 3151 if (REG_GET(dsidev, DSI_COMPLEXIO_CFG2, 16, 16)) { /* HS_BUSY */ 3152 DSSERR("HS busy when enabling ULPS\n"); 3153 return -EIO; 3154 } 3155 3156 if (REG_GET(dsidev, DSI_COMPLEXIO_CFG2, 17, 17)) { /* LP_BUSY */ 3157 DSSERR("LP busy when enabling ULPS\n"); 3158 return -EIO; 3159 } 3160 3161 r = dsi_register_isr_cio(dsidev, dsi_completion_handler, &completion, 3162 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0); 3163 if (r) 3164 return r; 3165 3166 mask = 0; 3167 3168 for (i = 0; i < dsi->num_lanes_supported; ++i) { 3169 if (dsi->lanes[i].function == DSI_LANE_UNUSED) 3170 continue; 3171 mask |= 1 << i; 3172 } 3173 /* Assert TxRequestEsc for data lanes and TxUlpsClk for clk lane */ 3174 /* LANEx_ULPS_SIG2 */ 3175 REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG2, mask, 9, 5); 3176 3177 /* flush posted write and wait for SCP interface to finish the write */ 3178 dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG2); 3179 3180 if (wait_for_completion_timeout(&completion, 3181 msecs_to_jiffies(1000)) == 0) { 3182 DSSERR("ULPS enable timeout\n"); 3183 r = -EIO; 3184 goto err; 3185 } 3186 3187 dsi_unregister_isr_cio(dsidev, dsi_completion_handler, &completion, 3188 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0); 3189 3190 /* Reset LANEx_ULPS_SIG2 */ 3191 REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG2, 0, 9, 5); 3192 3193 /* flush posted write and wait for SCP interface to finish the write */ 3194 dsi_read_reg(dsidev, DSI_COMPLEXIO_CFG2); 3195 3196 dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ULPS); 3197 3198 dsi_if_enable(dsidev, false); 3199 3200 dsi->ulps_enabled = true; 3201 3202 return 0; 3203 3204 err: 3205 dsi_unregister_isr_cio(dsidev, dsi_completion_handler, &completion, 3206 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0); 3207 return r; 3208 } 3209 3210 static void dsi_set_lp_rx_timeout(struct platform_device *dsidev, 3211 unsigned ticks, bool x4, bool x16) 3212 { 3213 unsigned long fck; 3214 unsigned long total_ticks; 3215 u32 r; 3216 3217 BUG_ON(ticks > 0x1fff); 3218 3219 /* ticks in DSI_FCK */ 3220 fck = dsi_fclk_rate(dsidev); 3221 3222 r = dsi_read_reg(dsidev, DSI_TIMING2); 3223 r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */ 3224 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */ 3225 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */ 3226 r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */ 3227 dsi_write_reg(dsidev, DSI_TIMING2, r); 3228 3229 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1); 3230 3231 DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n", 3232 total_ticks, 3233 ticks, x4 ? " x4" : "", x16 ? " x16" : "", 3234 (total_ticks * 1000) / (fck / 1000 / 1000)); 3235 } 3236 3237 static void dsi_set_ta_timeout(struct platform_device *dsidev, unsigned ticks, 3238 bool x8, bool x16) 3239 { 3240 unsigned long fck; 3241 unsigned long total_ticks; 3242 u32 r; 3243 3244 BUG_ON(ticks > 0x1fff); 3245 3246 /* ticks in DSI_FCK */ 3247 fck = dsi_fclk_rate(dsidev); 3248 3249 r = dsi_read_reg(dsidev, DSI_TIMING1); 3250 r = FLD_MOD(r, 1, 31, 31); /* TA_TO */ 3251 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */ 3252 r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */ 3253 r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */ 3254 dsi_write_reg(dsidev, DSI_TIMING1, r); 3255 3256 total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1); 3257 3258 DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n", 3259 total_ticks, 3260 ticks, x8 ? " x8" : "", x16 ? " x16" : "", 3261 (total_ticks * 1000) / (fck / 1000 / 1000)); 3262 } 3263 3264 static void dsi_set_stop_state_counter(struct platform_device *dsidev, 3265 unsigned ticks, bool x4, bool x16) 3266 { 3267 unsigned long fck; 3268 unsigned long total_ticks; 3269 u32 r; 3270 3271 BUG_ON(ticks > 0x1fff); 3272 3273 /* ticks in DSI_FCK */ 3274 fck = dsi_fclk_rate(dsidev); 3275 3276 r = dsi_read_reg(dsidev, DSI_TIMING1); 3277 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */ 3278 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */ 3279 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */ 3280 r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */ 3281 dsi_write_reg(dsidev, DSI_TIMING1, r); 3282 3283 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1); 3284 3285 DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n", 3286 total_ticks, 3287 ticks, x4 ? " x4" : "", x16 ? " x16" : "", 3288 (total_ticks * 1000) / (fck / 1000 / 1000)); 3289 } 3290 3291 static void dsi_set_hs_tx_timeout(struct platform_device *dsidev, 3292 unsigned ticks, bool x4, bool x16) 3293 { 3294 unsigned long fck; 3295 unsigned long total_ticks; 3296 u32 r; 3297 3298 BUG_ON(ticks > 0x1fff); 3299 3300 /* ticks in TxByteClkHS */ 3301 fck = dsi_get_txbyteclkhs(dsidev); 3302 3303 r = dsi_read_reg(dsidev, DSI_TIMING2); 3304 r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */ 3305 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */ 3306 r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */ 3307 r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */ 3308 dsi_write_reg(dsidev, DSI_TIMING2, r); 3309 3310 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1); 3311 3312 DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n", 3313 total_ticks, 3314 ticks, x4 ? " x4" : "", x16 ? " x16" : "", 3315 (total_ticks * 1000) / (fck / 1000 / 1000)); 3316 } 3317 3318 static void dsi_config_vp_num_line_buffers(struct platform_device *dsidev) 3319 { 3320 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 3321 int num_line_buffers; 3322 3323 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) { 3324 int bpp = dsi_get_pixel_size(dsi->pix_fmt); 3325 struct omap_video_timings *timings = &dsi->timings; 3326 /* 3327 * Don't use line buffers if width is greater than the video 3328 * port's line buffer size 3329 */ 3330 if (dsi->line_buffer_size <= timings->x_res * bpp / 8) 3331 num_line_buffers = 0; 3332 else 3333 num_line_buffers = 2; 3334 } else { 3335 /* Use maximum number of line buffers in command mode */ 3336 num_line_buffers = 2; 3337 } 3338 3339 /* LINE_BUFFER */ 3340 REG_FLD_MOD(dsidev, DSI_CTRL, num_line_buffers, 13, 12); 3341 } 3342 3343 static void dsi_config_vp_sync_events(struct platform_device *dsidev) 3344 { 3345 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 3346 bool sync_end; 3347 u32 r; 3348 3349 if (dsi->vm_timings.trans_mode == OMAP_DSS_DSI_PULSE_MODE) 3350 sync_end = true; 3351 else 3352 sync_end = false; 3353 3354 r = dsi_read_reg(dsidev, DSI_CTRL); 3355 r = FLD_MOD(r, 1, 9, 9); /* VP_DE_POL */ 3356 r = FLD_MOD(r, 1, 10, 10); /* VP_HSYNC_POL */ 3357 r = FLD_MOD(r, 1, 11, 11); /* VP_VSYNC_POL */ 3358 r = FLD_MOD(r, 1, 15, 15); /* VP_VSYNC_START */ 3359 r = FLD_MOD(r, sync_end, 16, 16); /* VP_VSYNC_END */ 3360 r = FLD_MOD(r, 1, 17, 17); /* VP_HSYNC_START */ 3361 r = FLD_MOD(r, sync_end, 18, 18); /* VP_HSYNC_END */ 3362 dsi_write_reg(dsidev, DSI_CTRL, r); 3363 } 3364 3365 static void dsi_config_blanking_modes(struct platform_device *dsidev) 3366 { 3367 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 3368 int blanking_mode = dsi->vm_timings.blanking_mode; 3369 int hfp_blanking_mode = dsi->vm_timings.hfp_blanking_mode; 3370 int hbp_blanking_mode = dsi->vm_timings.hbp_blanking_mode; 3371 int hsa_blanking_mode = dsi->vm_timings.hsa_blanking_mode; 3372 u32 r; 3373 3374 /* 3375 * 0 = TX FIFO packets sent or LPS in corresponding blanking periods 3376 * 1 = Long blanking packets are sent in corresponding blanking periods 3377 */ 3378 r = dsi_read_reg(dsidev, DSI_CTRL); 3379 r = FLD_MOD(r, blanking_mode, 20, 20); /* BLANKING_MODE */ 3380 r = FLD_MOD(r, hfp_blanking_mode, 21, 21); /* HFP_BLANKING */ 3381 r = FLD_MOD(r, hbp_blanking_mode, 22, 22); /* HBP_BLANKING */ 3382 r = FLD_MOD(r, hsa_blanking_mode, 23, 23); /* HSA_BLANKING */ 3383 dsi_write_reg(dsidev, DSI_CTRL, r); 3384 } 3385 3386 /* 3387 * According to section 'HS Command Mode Interleaving' in OMAP TRM, Scenario 3 3388 * results in maximum transition time for data and clock lanes to enter and 3389 * exit HS mode. Hence, this is the scenario where the least amount of command 3390 * mode data can be interleaved. We program the minimum amount of TXBYTECLKHS 3391 * clock cycles that can be used to interleave command mode data in HS so that 3392 * all scenarios are satisfied. 3393 */ 3394 static int dsi_compute_interleave_hs(int blank, bool ddr_alwon, int enter_hs, 3395 int exit_hs, int exiths_clk, int ddr_pre, int ddr_post) 3396 { 3397 int transition; 3398 3399 /* 3400 * If DDR_CLK_ALWAYS_ON is set, we need to consider HS mode transition 3401 * time of data lanes only, if it isn't set, we need to consider HS 3402 * transition time of both data and clock lanes. HS transition time 3403 * of Scenario 3 is considered. 3404 */ 3405 if (ddr_alwon) { 3406 transition = enter_hs + exit_hs + max(enter_hs, 2) + 1; 3407 } else { 3408 int trans1, trans2; 3409 trans1 = ddr_pre + enter_hs + exit_hs + max(enter_hs, 2) + 1; 3410 trans2 = ddr_pre + enter_hs + exiths_clk + ddr_post + ddr_pre + 3411 enter_hs + 1; 3412 transition = max(trans1, trans2); 3413 } 3414 3415 return blank > transition ? blank - transition : 0; 3416 } 3417 3418 /* 3419 * According to section 'LP Command Mode Interleaving' in OMAP TRM, Scenario 1 3420 * results in maximum transition time for data lanes to enter and exit LP mode. 3421 * Hence, this is the scenario where the least amount of command mode data can 3422 * be interleaved. We program the minimum amount of bytes that can be 3423 * interleaved in LP so that all scenarios are satisfied. 3424 */ 3425 static int dsi_compute_interleave_lp(int blank, int enter_hs, int exit_hs, 3426 int lp_clk_div, int tdsi_fclk) 3427 { 3428 int trans_lp; /* time required for a LP transition, in TXBYTECLKHS */ 3429 int tlp_avail; /* time left for interleaving commands, in CLKIN4DDR */ 3430 int ttxclkesc; /* period of LP transmit escape clock, in CLKIN4DDR */ 3431 int thsbyte_clk = 16; /* Period of TXBYTECLKHS clock, in CLKIN4DDR */ 3432 int lp_inter; /* cmd mode data that can be interleaved, in bytes */ 3433 3434 /* maximum LP transition time according to Scenario 1 */ 3435 trans_lp = exit_hs + max(enter_hs, 2) + 1; 3436 3437 /* CLKIN4DDR = 16 * TXBYTECLKHS */ 3438 tlp_avail = thsbyte_clk * (blank - trans_lp); 3439 3440 ttxclkesc = tdsi_fclk * lp_clk_div; 3441 3442 lp_inter = ((tlp_avail - 8 * thsbyte_clk - 5 * tdsi_fclk) / ttxclkesc - 3443 26) / 16; 3444 3445 return max(lp_inter, 0); 3446 } 3447 3448 static void dsi_config_cmd_mode_interleaving(struct platform_device *dsidev) 3449 { 3450 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 3451 int blanking_mode; 3452 int hfp_blanking_mode, hbp_blanking_mode, hsa_blanking_mode; 3453 int hsa, hfp, hbp, width_bytes, bllp, lp_clk_div; 3454 int ddr_clk_pre, ddr_clk_post, enter_hs_mode_lat, exit_hs_mode_lat; 3455 int tclk_trail, ths_exit, exiths_clk; 3456 bool ddr_alwon; 3457 struct omap_video_timings *timings = &dsi->timings; 3458 int bpp = dsi_get_pixel_size(dsi->pix_fmt); 3459 int ndl = dsi->num_lanes_used - 1; 3460 int dsi_fclk_hsdiv = dsi->user_dsi_cinfo.mX[HSDIV_DSI] + 1; 3461 int hsa_interleave_hs = 0, hsa_interleave_lp = 0; 3462 int hfp_interleave_hs = 0, hfp_interleave_lp = 0; 3463 int hbp_interleave_hs = 0, hbp_interleave_lp = 0; 3464 int bl_interleave_hs = 0, bl_interleave_lp = 0; 3465 u32 r; 3466 3467 r = dsi_read_reg(dsidev, DSI_CTRL); 3468 blanking_mode = FLD_GET(r, 20, 20); 3469 hfp_blanking_mode = FLD_GET(r, 21, 21); 3470 hbp_blanking_mode = FLD_GET(r, 22, 22); 3471 hsa_blanking_mode = FLD_GET(r, 23, 23); 3472 3473 r = dsi_read_reg(dsidev, DSI_VM_TIMING1); 3474 hbp = FLD_GET(r, 11, 0); 3475 hfp = FLD_GET(r, 23, 12); 3476 hsa = FLD_GET(r, 31, 24); 3477 3478 r = dsi_read_reg(dsidev, DSI_CLK_TIMING); 3479 ddr_clk_post = FLD_GET(r, 7, 0); 3480 ddr_clk_pre = FLD_GET(r, 15, 8); 3481 3482 r = dsi_read_reg(dsidev, DSI_VM_TIMING7); 3483 exit_hs_mode_lat = FLD_GET(r, 15, 0); 3484 enter_hs_mode_lat = FLD_GET(r, 31, 16); 3485 3486 r = dsi_read_reg(dsidev, DSI_CLK_CTRL); 3487 lp_clk_div = FLD_GET(r, 12, 0); 3488 ddr_alwon = FLD_GET(r, 13, 13); 3489 3490 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG0); 3491 ths_exit = FLD_GET(r, 7, 0); 3492 3493 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG1); 3494 tclk_trail = FLD_GET(r, 15, 8); 3495 3496 exiths_clk = ths_exit + tclk_trail; 3497 3498 width_bytes = DIV_ROUND_UP(timings->x_res * bpp, 8); 3499 bllp = hbp + hfp + hsa + DIV_ROUND_UP(width_bytes + 6, ndl); 3500 3501 if (!hsa_blanking_mode) { 3502 hsa_interleave_hs = dsi_compute_interleave_hs(hsa, ddr_alwon, 3503 enter_hs_mode_lat, exit_hs_mode_lat, 3504 exiths_clk, ddr_clk_pre, ddr_clk_post); 3505 hsa_interleave_lp = dsi_compute_interleave_lp(hsa, 3506 enter_hs_mode_lat, exit_hs_mode_lat, 3507 lp_clk_div, dsi_fclk_hsdiv); 3508 } 3509 3510 if (!hfp_blanking_mode) { 3511 hfp_interleave_hs = dsi_compute_interleave_hs(hfp, ddr_alwon, 3512 enter_hs_mode_lat, exit_hs_mode_lat, 3513 exiths_clk, ddr_clk_pre, ddr_clk_post); 3514 hfp_interleave_lp = dsi_compute_interleave_lp(hfp, 3515 enter_hs_mode_lat, exit_hs_mode_lat, 3516 lp_clk_div, dsi_fclk_hsdiv); 3517 } 3518 3519 if (!hbp_blanking_mode) { 3520 hbp_interleave_hs = dsi_compute_interleave_hs(hbp, ddr_alwon, 3521 enter_hs_mode_lat, exit_hs_mode_lat, 3522 exiths_clk, ddr_clk_pre, ddr_clk_post); 3523 3524 hbp_interleave_lp = dsi_compute_interleave_lp(hbp, 3525 enter_hs_mode_lat, exit_hs_mode_lat, 3526 lp_clk_div, dsi_fclk_hsdiv); 3527 } 3528 3529 if (!blanking_mode) { 3530 bl_interleave_hs = dsi_compute_interleave_hs(bllp, ddr_alwon, 3531 enter_hs_mode_lat, exit_hs_mode_lat, 3532 exiths_clk, ddr_clk_pre, ddr_clk_post); 3533 3534 bl_interleave_lp = dsi_compute_interleave_lp(bllp, 3535 enter_hs_mode_lat, exit_hs_mode_lat, 3536 lp_clk_div, dsi_fclk_hsdiv); 3537 } 3538 3539 DSSDBG("DSI HS interleaving(TXBYTECLKHS) HSA %d, HFP %d, HBP %d, BLLP %d\n", 3540 hsa_interleave_hs, hfp_interleave_hs, hbp_interleave_hs, 3541 bl_interleave_hs); 3542 3543 DSSDBG("DSI LP interleaving(bytes) HSA %d, HFP %d, HBP %d, BLLP %d\n", 3544 hsa_interleave_lp, hfp_interleave_lp, hbp_interleave_lp, 3545 bl_interleave_lp); 3546 3547 r = dsi_read_reg(dsidev, DSI_VM_TIMING4); 3548 r = FLD_MOD(r, hsa_interleave_hs, 23, 16); 3549 r = FLD_MOD(r, hfp_interleave_hs, 15, 8); 3550 r = FLD_MOD(r, hbp_interleave_hs, 7, 0); 3551 dsi_write_reg(dsidev, DSI_VM_TIMING4, r); 3552 3553 r = dsi_read_reg(dsidev, DSI_VM_TIMING5); 3554 r = FLD_MOD(r, hsa_interleave_lp, 23, 16); 3555 r = FLD_MOD(r, hfp_interleave_lp, 15, 8); 3556 r = FLD_MOD(r, hbp_interleave_lp, 7, 0); 3557 dsi_write_reg(dsidev, DSI_VM_TIMING5, r); 3558 3559 r = dsi_read_reg(dsidev, DSI_VM_TIMING6); 3560 r = FLD_MOD(r, bl_interleave_hs, 31, 15); 3561 r = FLD_MOD(r, bl_interleave_lp, 16, 0); 3562 dsi_write_reg(dsidev, DSI_VM_TIMING6, r); 3563 } 3564 3565 static int dsi_proto_config(struct platform_device *dsidev) 3566 { 3567 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 3568 u32 r; 3569 int buswidth = 0; 3570 3571 dsi_config_tx_fifo(dsidev, DSI_FIFO_SIZE_32, 3572 DSI_FIFO_SIZE_32, 3573 DSI_FIFO_SIZE_32, 3574 DSI_FIFO_SIZE_32); 3575 3576 dsi_config_rx_fifo(dsidev, DSI_FIFO_SIZE_32, 3577 DSI_FIFO_SIZE_32, 3578 DSI_FIFO_SIZE_32, 3579 DSI_FIFO_SIZE_32); 3580 3581 /* XXX what values for the timeouts? */ 3582 dsi_set_stop_state_counter(dsidev, 0x1000, false, false); 3583 dsi_set_ta_timeout(dsidev, 0x1fff, true, true); 3584 dsi_set_lp_rx_timeout(dsidev, 0x1fff, true, true); 3585 dsi_set_hs_tx_timeout(dsidev, 0x1fff, true, true); 3586 3587 switch (dsi_get_pixel_size(dsi->pix_fmt)) { 3588 case 16: 3589 buswidth = 0; 3590 break; 3591 case 18: 3592 buswidth = 1; 3593 break; 3594 case 24: 3595 buswidth = 2; 3596 break; 3597 default: 3598 BUG(); 3599 return -EINVAL; 3600 } 3601 3602 r = dsi_read_reg(dsidev, DSI_CTRL); 3603 r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */ 3604 r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */ 3605 r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */ 3606 r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/ 3607 r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */ 3608 r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */ 3609 r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */ 3610 r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */ 3611 if (!dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC)) { 3612 r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */ 3613 /* DCS_CMD_CODE, 1=start, 0=continue */ 3614 r = FLD_MOD(r, 0, 25, 25); 3615 } 3616 3617 dsi_write_reg(dsidev, DSI_CTRL, r); 3618 3619 dsi_config_vp_num_line_buffers(dsidev); 3620 3621 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) { 3622 dsi_config_vp_sync_events(dsidev); 3623 dsi_config_blanking_modes(dsidev); 3624 dsi_config_cmd_mode_interleaving(dsidev); 3625 } 3626 3627 dsi_vc_initial_config(dsidev, 0); 3628 dsi_vc_initial_config(dsidev, 1); 3629 dsi_vc_initial_config(dsidev, 2); 3630 dsi_vc_initial_config(dsidev, 3); 3631 3632 return 0; 3633 } 3634 3635 static void dsi_proto_timings(struct platform_device *dsidev) 3636 { 3637 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 3638 unsigned tlpx, tclk_zero, tclk_prepare, tclk_trail; 3639 unsigned tclk_pre, tclk_post; 3640 unsigned ths_prepare, ths_prepare_ths_zero, ths_zero; 3641 unsigned ths_trail, ths_exit; 3642 unsigned ddr_clk_pre, ddr_clk_post; 3643 unsigned enter_hs_mode_lat, exit_hs_mode_lat; 3644 unsigned ths_eot; 3645 int ndl = dsi->num_lanes_used - 1; 3646 u32 r; 3647 3648 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG0); 3649 ths_prepare = FLD_GET(r, 31, 24); 3650 ths_prepare_ths_zero = FLD_GET(r, 23, 16); 3651 ths_zero = ths_prepare_ths_zero - ths_prepare; 3652 ths_trail = FLD_GET(r, 15, 8); 3653 ths_exit = FLD_GET(r, 7, 0); 3654 3655 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG1); 3656 tlpx = FLD_GET(r, 20, 16) * 2; 3657 tclk_trail = FLD_GET(r, 15, 8); 3658 tclk_zero = FLD_GET(r, 7, 0); 3659 3660 r = dsi_read_reg(dsidev, DSI_DSIPHY_CFG2); 3661 tclk_prepare = FLD_GET(r, 7, 0); 3662 3663 /* min 8*UI */ 3664 tclk_pre = 20; 3665 /* min 60ns + 52*UI */ 3666 tclk_post = ns2ddr(dsidev, 60) + 26; 3667 3668 ths_eot = DIV_ROUND_UP(4, ndl); 3669 3670 ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare, 3671 4); 3672 ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot; 3673 3674 BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255); 3675 BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255); 3676 3677 r = dsi_read_reg(dsidev, DSI_CLK_TIMING); 3678 r = FLD_MOD(r, ddr_clk_pre, 15, 8); 3679 r = FLD_MOD(r, ddr_clk_post, 7, 0); 3680 dsi_write_reg(dsidev, DSI_CLK_TIMING, r); 3681 3682 DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n", 3683 ddr_clk_pre, 3684 ddr_clk_post); 3685 3686 enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) + 3687 DIV_ROUND_UP(ths_prepare, 4) + 3688 DIV_ROUND_UP(ths_zero + 3, 4); 3689 3690 exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot; 3691 3692 r = FLD_VAL(enter_hs_mode_lat, 31, 16) | 3693 FLD_VAL(exit_hs_mode_lat, 15, 0); 3694 dsi_write_reg(dsidev, DSI_VM_TIMING7, r); 3695 3696 DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n", 3697 enter_hs_mode_lat, exit_hs_mode_lat); 3698 3699 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) { 3700 /* TODO: Implement a video mode check_timings function */ 3701 int hsa = dsi->vm_timings.hsa; 3702 int hfp = dsi->vm_timings.hfp; 3703 int hbp = dsi->vm_timings.hbp; 3704 int vsa = dsi->vm_timings.vsa; 3705 int vfp = dsi->vm_timings.vfp; 3706 int vbp = dsi->vm_timings.vbp; 3707 int window_sync = dsi->vm_timings.window_sync; 3708 bool hsync_end; 3709 struct omap_video_timings *timings = &dsi->timings; 3710 int bpp = dsi_get_pixel_size(dsi->pix_fmt); 3711 int tl, t_he, width_bytes; 3712 3713 hsync_end = dsi->vm_timings.trans_mode == OMAP_DSS_DSI_PULSE_MODE; 3714 t_he = hsync_end ? 3715 ((hsa == 0 && ndl == 3) ? 1 : DIV_ROUND_UP(4, ndl)) : 0; 3716 3717 width_bytes = DIV_ROUND_UP(timings->x_res * bpp, 8); 3718 3719 /* TL = t_HS + HSA + t_HE + HFP + ceil((WC + 6) / NDL) + HBP */ 3720 tl = DIV_ROUND_UP(4, ndl) + (hsync_end ? hsa : 0) + t_he + hfp + 3721 DIV_ROUND_UP(width_bytes + 6, ndl) + hbp; 3722 3723 DSSDBG("HBP: %d, HFP: %d, HSA: %d, TL: %d TXBYTECLKHS\n", hbp, 3724 hfp, hsync_end ? hsa : 0, tl); 3725 DSSDBG("VBP: %d, VFP: %d, VSA: %d, VACT: %d lines\n", vbp, vfp, 3726 vsa, timings->y_res); 3727 3728 r = dsi_read_reg(dsidev, DSI_VM_TIMING1); 3729 r = FLD_MOD(r, hbp, 11, 0); /* HBP */ 3730 r = FLD_MOD(r, hfp, 23, 12); /* HFP */ 3731 r = FLD_MOD(r, hsync_end ? hsa : 0, 31, 24); /* HSA */ 3732 dsi_write_reg(dsidev, DSI_VM_TIMING1, r); 3733 3734 r = dsi_read_reg(dsidev, DSI_VM_TIMING2); 3735 r = FLD_MOD(r, vbp, 7, 0); /* VBP */ 3736 r = FLD_MOD(r, vfp, 15, 8); /* VFP */ 3737 r = FLD_MOD(r, vsa, 23, 16); /* VSA */ 3738 r = FLD_MOD(r, window_sync, 27, 24); /* WINDOW_SYNC */ 3739 dsi_write_reg(dsidev, DSI_VM_TIMING2, r); 3740 3741 r = dsi_read_reg(dsidev, DSI_VM_TIMING3); 3742 r = FLD_MOD(r, timings->y_res, 14, 0); /* VACT */ 3743 r = FLD_MOD(r, tl, 31, 16); /* TL */ 3744 dsi_write_reg(dsidev, DSI_VM_TIMING3, r); 3745 } 3746 } 3747 3748 static int dsi_configure_pins(struct omap_dss_device *dssdev, 3749 const struct omap_dsi_pin_config *pin_cfg) 3750 { 3751 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 3752 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 3753 int num_pins; 3754 const int *pins; 3755 struct dsi_lane_config lanes[DSI_MAX_NR_LANES]; 3756 int num_lanes; 3757 int i; 3758 3759 static const enum dsi_lane_function functions[] = { 3760 DSI_LANE_CLK, 3761 DSI_LANE_DATA1, 3762 DSI_LANE_DATA2, 3763 DSI_LANE_DATA3, 3764 DSI_LANE_DATA4, 3765 }; 3766 3767 num_pins = pin_cfg->num_pins; 3768 pins = pin_cfg->pins; 3769 3770 if (num_pins < 4 || num_pins > dsi->num_lanes_supported * 2 3771 || num_pins % 2 != 0) 3772 return -EINVAL; 3773 3774 for (i = 0; i < DSI_MAX_NR_LANES; ++i) 3775 lanes[i].function = DSI_LANE_UNUSED; 3776 3777 num_lanes = 0; 3778 3779 for (i = 0; i < num_pins; i += 2) { 3780 u8 lane, pol; 3781 int dx, dy; 3782 3783 dx = pins[i]; 3784 dy = pins[i + 1]; 3785 3786 if (dx < 0 || dx >= dsi->num_lanes_supported * 2) 3787 return -EINVAL; 3788 3789 if (dy < 0 || dy >= dsi->num_lanes_supported * 2) 3790 return -EINVAL; 3791 3792 if (dx & 1) { 3793 if (dy != dx - 1) 3794 return -EINVAL; 3795 pol = 1; 3796 } else { 3797 if (dy != dx + 1) 3798 return -EINVAL; 3799 pol = 0; 3800 } 3801 3802 lane = dx / 2; 3803 3804 lanes[lane].function = functions[i / 2]; 3805 lanes[lane].polarity = pol; 3806 num_lanes++; 3807 } 3808 3809 memcpy(dsi->lanes, lanes, sizeof(dsi->lanes)); 3810 dsi->num_lanes_used = num_lanes; 3811 3812 return 0; 3813 } 3814 3815 static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel) 3816 { 3817 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 3818 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 3819 struct omap_overlay_manager *mgr = dsi->output.manager; 3820 int bpp = dsi_get_pixel_size(dsi->pix_fmt); 3821 struct omap_dss_device *out = &dsi->output; 3822 u8 data_type; 3823 u16 word_count; 3824 int r; 3825 3826 if (out->manager == NULL) { 3827 DSSERR("failed to enable display: no output/manager\n"); 3828 return -ENODEV; 3829 } 3830 3831 r = dsi_display_init_dispc(dsidev, mgr); 3832 if (r) 3833 goto err_init_dispc; 3834 3835 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) { 3836 switch (dsi->pix_fmt) { 3837 case OMAP_DSS_DSI_FMT_RGB888: 3838 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_24; 3839 break; 3840 case OMAP_DSS_DSI_FMT_RGB666: 3841 data_type = MIPI_DSI_PIXEL_STREAM_3BYTE_18; 3842 break; 3843 case OMAP_DSS_DSI_FMT_RGB666_PACKED: 3844 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_18; 3845 break; 3846 case OMAP_DSS_DSI_FMT_RGB565: 3847 data_type = MIPI_DSI_PACKED_PIXEL_STREAM_16; 3848 break; 3849 default: 3850 r = -EINVAL; 3851 goto err_pix_fmt; 3852 } 3853 3854 dsi_if_enable(dsidev, false); 3855 dsi_vc_enable(dsidev, channel, false); 3856 3857 /* MODE, 1 = video mode */ 3858 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 1, 4, 4); 3859 3860 word_count = DIV_ROUND_UP(dsi->timings.x_res * bpp, 8); 3861 3862 dsi_vc_write_long_header(dsidev, channel, data_type, 3863 word_count, 0); 3864 3865 dsi_vc_enable(dsidev, channel, true); 3866 dsi_if_enable(dsidev, true); 3867 } 3868 3869 r = dss_mgr_enable(mgr); 3870 if (r) 3871 goto err_mgr_enable; 3872 3873 return 0; 3874 3875 err_mgr_enable: 3876 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) { 3877 dsi_if_enable(dsidev, false); 3878 dsi_vc_enable(dsidev, channel, false); 3879 } 3880 err_pix_fmt: 3881 dsi_display_uninit_dispc(dsidev, mgr); 3882 err_init_dispc: 3883 return r; 3884 } 3885 3886 static void dsi_disable_video_output(struct omap_dss_device *dssdev, int channel) 3887 { 3888 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 3889 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 3890 struct omap_overlay_manager *mgr = dsi->output.manager; 3891 3892 if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) { 3893 dsi_if_enable(dsidev, false); 3894 dsi_vc_enable(dsidev, channel, false); 3895 3896 /* MODE, 0 = command mode */ 3897 REG_FLD_MOD(dsidev, DSI_VC_CTRL(channel), 0, 4, 4); 3898 3899 dsi_vc_enable(dsidev, channel, true); 3900 dsi_if_enable(dsidev, true); 3901 } 3902 3903 dss_mgr_disable(mgr); 3904 3905 dsi_display_uninit_dispc(dsidev, mgr); 3906 } 3907 3908 static void dsi_update_screen_dispc(struct platform_device *dsidev) 3909 { 3910 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 3911 struct omap_overlay_manager *mgr = dsi->output.manager; 3912 unsigned bytespp; 3913 unsigned bytespl; 3914 unsigned bytespf; 3915 unsigned total_len; 3916 unsigned packet_payload; 3917 unsigned packet_len; 3918 u32 l; 3919 int r; 3920 const unsigned channel = dsi->update_channel; 3921 const unsigned line_buf_size = dsi->line_buffer_size; 3922 u16 w = dsi->timings.x_res; 3923 u16 h = dsi->timings.y_res; 3924 3925 DSSDBG("dsi_update_screen_dispc(%dx%d)\n", w, h); 3926 3927 dsi_vc_config_source(dsidev, channel, DSI_VC_SOURCE_VP); 3928 3929 bytespp = dsi_get_pixel_size(dsi->pix_fmt) / 8; 3930 bytespl = w * bytespp; 3931 bytespf = bytespl * h; 3932 3933 /* NOTE: packet_payload has to be equal to N * bytespl, where N is 3934 * number of lines in a packet. See errata about VP_CLK_RATIO */ 3935 3936 if (bytespf < line_buf_size) 3937 packet_payload = bytespf; 3938 else 3939 packet_payload = (line_buf_size) / bytespl * bytespl; 3940 3941 packet_len = packet_payload + 1; /* 1 byte for DCS cmd */ 3942 total_len = (bytespf / packet_payload) * packet_len; 3943 3944 if (bytespf % packet_payload) 3945 total_len += (bytespf % packet_payload) + 1; 3946 3947 l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */ 3948 dsi_write_reg(dsidev, DSI_VC_TE(channel), l); 3949 3950 dsi_vc_write_long_header(dsidev, channel, MIPI_DSI_DCS_LONG_WRITE, 3951 packet_len, 0); 3952 3953 if (dsi->te_enabled) 3954 l = FLD_MOD(l, 1, 30, 30); /* TE_EN */ 3955 else 3956 l = FLD_MOD(l, 1, 31, 31); /* TE_START */ 3957 dsi_write_reg(dsidev, DSI_VC_TE(channel), l); 3958 3959 /* We put SIDLEMODE to no-idle for the duration of the transfer, 3960 * because DSS interrupts are not capable of waking up the CPU and the 3961 * framedone interrupt could be delayed for quite a long time. I think 3962 * the same goes for any DSS interrupts, but for some reason I have not 3963 * seen the problem anywhere else than here. 3964 */ 3965 dispc_disable_sidle(); 3966 3967 dsi_perf_mark_start(dsidev); 3968 3969 r = schedule_delayed_work(&dsi->framedone_timeout_work, 3970 msecs_to_jiffies(250)); 3971 BUG_ON(r == 0); 3972 3973 dss_mgr_set_timings(mgr, &dsi->timings); 3974 3975 dss_mgr_start_update(mgr); 3976 3977 if (dsi->te_enabled) { 3978 /* disable LP_RX_TO, so that we can receive TE. Time to wait 3979 * for TE is longer than the timer allows */ 3980 REG_FLD_MOD(dsidev, DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */ 3981 3982 dsi_vc_send_bta(dsidev, channel); 3983 3984 #ifdef DSI_CATCH_MISSING_TE 3985 mod_timer(&dsi->te_timer, jiffies + msecs_to_jiffies(250)); 3986 #endif 3987 } 3988 } 3989 3990 #ifdef DSI_CATCH_MISSING_TE 3991 static void dsi_te_timeout(unsigned long arg) 3992 { 3993 DSSERR("TE not received for 250ms!\n"); 3994 } 3995 #endif 3996 3997 static void dsi_handle_framedone(struct platform_device *dsidev, int error) 3998 { 3999 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4000 4001 /* SIDLEMODE back to smart-idle */ 4002 dispc_enable_sidle(); 4003 4004 if (dsi->te_enabled) { 4005 /* enable LP_RX_TO again after the TE */ 4006 REG_FLD_MOD(dsidev, DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */ 4007 } 4008 4009 dsi->framedone_callback(error, dsi->framedone_data); 4010 4011 if (!error) 4012 dsi_perf_show(dsidev, "DISPC"); 4013 } 4014 4015 static void dsi_framedone_timeout_work_callback(struct work_struct *work) 4016 { 4017 struct dsi_data *dsi = container_of(work, struct dsi_data, 4018 framedone_timeout_work.work); 4019 /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after 4020 * 250ms which would conflict with this timeout work. What should be 4021 * done is first cancel the transfer on the HW, and then cancel the 4022 * possibly scheduled framedone work. However, cancelling the transfer 4023 * on the HW is buggy, and would probably require resetting the whole 4024 * DSI */ 4025 4026 DSSERR("Framedone not received for 250ms!\n"); 4027 4028 dsi_handle_framedone(dsi->pdev, -ETIMEDOUT); 4029 } 4030 4031 static void dsi_framedone_irq_callback(void *data) 4032 { 4033 struct platform_device *dsidev = (struct platform_device *) data; 4034 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4035 4036 /* Note: We get FRAMEDONE when DISPC has finished sending pixels and 4037 * turns itself off. However, DSI still has the pixels in its buffers, 4038 * and is sending the data. 4039 */ 4040 4041 cancel_delayed_work(&dsi->framedone_timeout_work); 4042 4043 dsi_handle_framedone(dsidev, 0); 4044 } 4045 4046 static int dsi_update(struct omap_dss_device *dssdev, int channel, 4047 void (*callback)(int, void *), void *data) 4048 { 4049 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 4050 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4051 u16 dw, dh; 4052 4053 dsi_perf_mark_setup(dsidev); 4054 4055 dsi->update_channel = channel; 4056 4057 dsi->framedone_callback = callback; 4058 dsi->framedone_data = data; 4059 4060 dw = dsi->timings.x_res; 4061 dh = dsi->timings.y_res; 4062 4063 #ifdef DSI_PERF_MEASURE 4064 dsi->update_bytes = dw * dh * 4065 dsi_get_pixel_size(dsi->pix_fmt) / 8; 4066 #endif 4067 dsi_update_screen_dispc(dsidev); 4068 4069 return 0; 4070 } 4071 4072 /* Display funcs */ 4073 4074 static int dsi_configure_dispc_clocks(struct platform_device *dsidev) 4075 { 4076 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4077 struct dispc_clock_info dispc_cinfo; 4078 int r; 4079 unsigned long fck; 4080 4081 fck = dsi_get_pll_hsdiv_dispc_rate(dsidev); 4082 4083 dispc_cinfo.lck_div = dsi->user_dispc_cinfo.lck_div; 4084 dispc_cinfo.pck_div = dsi->user_dispc_cinfo.pck_div; 4085 4086 r = dispc_calc_clock_rates(fck, &dispc_cinfo); 4087 if (r) { 4088 DSSERR("Failed to calc dispc clocks\n"); 4089 return r; 4090 } 4091 4092 dsi->mgr_config.clock_info = dispc_cinfo; 4093 4094 return 0; 4095 } 4096 4097 static int dsi_display_init_dispc(struct platform_device *dsidev, 4098 struct omap_overlay_manager *mgr) 4099 { 4100 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4101 int r; 4102 4103 dss_select_lcd_clk_source(mgr->id, dsi->module_id == 0 ? 4104 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC : 4105 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC); 4106 4107 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE) { 4108 r = dss_mgr_register_framedone_handler(mgr, 4109 dsi_framedone_irq_callback, dsidev); 4110 if (r) { 4111 DSSERR("can't register FRAMEDONE handler\n"); 4112 goto err; 4113 } 4114 4115 dsi->mgr_config.stallmode = true; 4116 dsi->mgr_config.fifohandcheck = true; 4117 } else { 4118 dsi->mgr_config.stallmode = false; 4119 dsi->mgr_config.fifohandcheck = false; 4120 } 4121 4122 /* 4123 * override interlace, logic level and edge related parameters in 4124 * omap_video_timings with default values 4125 */ 4126 dsi->timings.interlace = false; 4127 dsi->timings.hsync_level = OMAPDSS_SIG_ACTIVE_HIGH; 4128 dsi->timings.vsync_level = OMAPDSS_SIG_ACTIVE_HIGH; 4129 dsi->timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE; 4130 dsi->timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH; 4131 dsi->timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE; 4132 4133 dss_mgr_set_timings(mgr, &dsi->timings); 4134 4135 r = dsi_configure_dispc_clocks(dsidev); 4136 if (r) 4137 goto err1; 4138 4139 dsi->mgr_config.io_pad_mode = DSS_IO_PAD_MODE_BYPASS; 4140 dsi->mgr_config.video_port_width = 4141 dsi_get_pixel_size(dsi->pix_fmt); 4142 dsi->mgr_config.lcden_sig_polarity = 0; 4143 4144 dss_mgr_set_lcd_config(mgr, &dsi->mgr_config); 4145 4146 return 0; 4147 err1: 4148 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE) 4149 dss_mgr_unregister_framedone_handler(mgr, 4150 dsi_framedone_irq_callback, dsidev); 4151 err: 4152 dss_select_lcd_clk_source(mgr->id, OMAP_DSS_CLK_SRC_FCK); 4153 return r; 4154 } 4155 4156 static void dsi_display_uninit_dispc(struct platform_device *dsidev, 4157 struct omap_overlay_manager *mgr) 4158 { 4159 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4160 4161 if (dsi->mode == OMAP_DSS_DSI_CMD_MODE) 4162 dss_mgr_unregister_framedone_handler(mgr, 4163 dsi_framedone_irq_callback, dsidev); 4164 4165 dss_select_lcd_clk_source(mgr->id, OMAP_DSS_CLK_SRC_FCK); 4166 } 4167 4168 static int dsi_configure_dsi_clocks(struct platform_device *dsidev) 4169 { 4170 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4171 struct dss_pll_clock_info cinfo; 4172 int r; 4173 4174 cinfo = dsi->user_dsi_cinfo; 4175 4176 r = dss_pll_set_config(&dsi->pll, &cinfo); 4177 if (r) { 4178 DSSERR("Failed to set dsi clocks\n"); 4179 return r; 4180 } 4181 4182 return 0; 4183 } 4184 4185 static int dsi_display_init_dsi(struct platform_device *dsidev) 4186 { 4187 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4188 int r; 4189 4190 r = dss_pll_enable(&dsi->pll); 4191 if (r) 4192 goto err0; 4193 4194 r = dsi_configure_dsi_clocks(dsidev); 4195 if (r) 4196 goto err1; 4197 4198 dss_select_dsi_clk_source(dsi->module_id, dsi->module_id == 0 ? 4199 OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI : 4200 OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI); 4201 4202 DSSDBG("PLL OK\n"); 4203 4204 r = dsi_cio_init(dsidev); 4205 if (r) 4206 goto err2; 4207 4208 _dsi_print_reset_status(dsidev); 4209 4210 dsi_proto_timings(dsidev); 4211 dsi_set_lp_clk_divisor(dsidev); 4212 4213 if (1) 4214 _dsi_print_reset_status(dsidev); 4215 4216 r = dsi_proto_config(dsidev); 4217 if (r) 4218 goto err3; 4219 4220 /* enable interface */ 4221 dsi_vc_enable(dsidev, 0, 1); 4222 dsi_vc_enable(dsidev, 1, 1); 4223 dsi_vc_enable(dsidev, 2, 1); 4224 dsi_vc_enable(dsidev, 3, 1); 4225 dsi_if_enable(dsidev, 1); 4226 dsi_force_tx_stop_mode_io(dsidev); 4227 4228 return 0; 4229 err3: 4230 dsi_cio_uninit(dsidev); 4231 err2: 4232 dss_select_dsi_clk_source(dsi->module_id, OMAP_DSS_CLK_SRC_FCK); 4233 err1: 4234 dss_pll_disable(&dsi->pll); 4235 err0: 4236 return r; 4237 } 4238 4239 static void dsi_display_uninit_dsi(struct platform_device *dsidev, 4240 bool disconnect_lanes, bool enter_ulps) 4241 { 4242 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4243 4244 if (enter_ulps && !dsi->ulps_enabled) 4245 dsi_enter_ulps(dsidev); 4246 4247 /* disable interface */ 4248 dsi_if_enable(dsidev, 0); 4249 dsi_vc_enable(dsidev, 0, 0); 4250 dsi_vc_enable(dsidev, 1, 0); 4251 dsi_vc_enable(dsidev, 2, 0); 4252 dsi_vc_enable(dsidev, 3, 0); 4253 4254 dss_select_dsi_clk_source(dsi->module_id, OMAP_DSS_CLK_SRC_FCK); 4255 dsi_cio_uninit(dsidev); 4256 dsi_pll_uninit(dsidev, disconnect_lanes); 4257 } 4258 4259 static int dsi_display_enable(struct omap_dss_device *dssdev) 4260 { 4261 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 4262 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4263 int r = 0; 4264 4265 DSSDBG("dsi_display_enable\n"); 4266 4267 WARN_ON(!dsi_bus_is_locked(dsidev)); 4268 4269 mutex_lock(&dsi->lock); 4270 4271 r = dsi_runtime_get(dsidev); 4272 if (r) 4273 goto err_get_dsi; 4274 4275 _dsi_initialize_irq(dsidev); 4276 4277 r = dsi_display_init_dsi(dsidev); 4278 if (r) 4279 goto err_init_dsi; 4280 4281 mutex_unlock(&dsi->lock); 4282 4283 return 0; 4284 4285 err_init_dsi: 4286 dsi_runtime_put(dsidev); 4287 err_get_dsi: 4288 mutex_unlock(&dsi->lock); 4289 DSSDBG("dsi_display_enable FAILED\n"); 4290 return r; 4291 } 4292 4293 static void dsi_display_disable(struct omap_dss_device *dssdev, 4294 bool disconnect_lanes, bool enter_ulps) 4295 { 4296 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 4297 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4298 4299 DSSDBG("dsi_display_disable\n"); 4300 4301 WARN_ON(!dsi_bus_is_locked(dsidev)); 4302 4303 mutex_lock(&dsi->lock); 4304 4305 dsi_sync_vc(dsidev, 0); 4306 dsi_sync_vc(dsidev, 1); 4307 dsi_sync_vc(dsidev, 2); 4308 dsi_sync_vc(dsidev, 3); 4309 4310 dsi_display_uninit_dsi(dsidev, disconnect_lanes, enter_ulps); 4311 4312 dsi_runtime_put(dsidev); 4313 4314 mutex_unlock(&dsi->lock); 4315 } 4316 4317 static int dsi_enable_te(struct omap_dss_device *dssdev, bool enable) 4318 { 4319 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 4320 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4321 4322 dsi->te_enabled = enable; 4323 return 0; 4324 } 4325 4326 #ifdef PRINT_VERBOSE_VM_TIMINGS 4327 static void print_dsi_vm(const char *str, 4328 const struct omap_dss_dsi_videomode_timings *t) 4329 { 4330 unsigned long byteclk = t->hsclk / 4; 4331 int bl, wc, pps, tot; 4332 4333 wc = DIV_ROUND_UP(t->hact * t->bitspp, 8); 4334 pps = DIV_ROUND_UP(wc + 6, t->ndl); /* pixel packet size */ 4335 bl = t->hss + t->hsa + t->hse + t->hbp + t->hfp; 4336 tot = bl + pps; 4337 4338 #define TO_DSI_T(x) ((u32)div64_u64((u64)x * 1000000000llu, byteclk)) 4339 4340 pr_debug("%s bck %lu, %u/%u/%u/%u/%u/%u = %u+%u = %u, " 4341 "%u/%u/%u/%u/%u/%u = %u + %u = %u\n", 4342 str, 4343 byteclk, 4344 t->hss, t->hsa, t->hse, t->hbp, pps, t->hfp, 4345 bl, pps, tot, 4346 TO_DSI_T(t->hss), 4347 TO_DSI_T(t->hsa), 4348 TO_DSI_T(t->hse), 4349 TO_DSI_T(t->hbp), 4350 TO_DSI_T(pps), 4351 TO_DSI_T(t->hfp), 4352 4353 TO_DSI_T(bl), 4354 TO_DSI_T(pps), 4355 4356 TO_DSI_T(tot)); 4357 #undef TO_DSI_T 4358 } 4359 4360 static void print_dispc_vm(const char *str, const struct omap_video_timings *t) 4361 { 4362 unsigned long pck = t->pixelclock; 4363 int hact, bl, tot; 4364 4365 hact = t->x_res; 4366 bl = t->hsw + t->hbp + t->hfp; 4367 tot = hact + bl; 4368 4369 #define TO_DISPC_T(x) ((u32)div64_u64((u64)x * 1000000000llu, pck)) 4370 4371 pr_debug("%s pck %lu, %u/%u/%u/%u = %u+%u = %u, " 4372 "%u/%u/%u/%u = %u + %u = %u\n", 4373 str, 4374 pck, 4375 t->hsw, t->hbp, hact, t->hfp, 4376 bl, hact, tot, 4377 TO_DISPC_T(t->hsw), 4378 TO_DISPC_T(t->hbp), 4379 TO_DISPC_T(hact), 4380 TO_DISPC_T(t->hfp), 4381 TO_DISPC_T(bl), 4382 TO_DISPC_T(hact), 4383 TO_DISPC_T(tot)); 4384 #undef TO_DISPC_T 4385 } 4386 4387 /* note: this is not quite accurate */ 4388 static void print_dsi_dispc_vm(const char *str, 4389 const struct omap_dss_dsi_videomode_timings *t) 4390 { 4391 struct omap_video_timings vm = { 0 }; 4392 unsigned long byteclk = t->hsclk / 4; 4393 unsigned long pck; 4394 u64 dsi_tput; 4395 int dsi_hact, dsi_htot; 4396 4397 dsi_tput = (u64)byteclk * t->ndl * 8; 4398 pck = (u32)div64_u64(dsi_tput, t->bitspp); 4399 dsi_hact = DIV_ROUND_UP(DIV_ROUND_UP(t->hact * t->bitspp, 8) + 6, t->ndl); 4400 dsi_htot = t->hss + t->hsa + t->hse + t->hbp + dsi_hact + t->hfp; 4401 4402 vm.pixelclock = pck; 4403 vm.hsw = div64_u64((u64)(t->hsa + t->hse) * pck, byteclk); 4404 vm.hbp = div64_u64((u64)t->hbp * pck, byteclk); 4405 vm.hfp = div64_u64((u64)t->hfp * pck, byteclk); 4406 vm.x_res = t->hact; 4407 4408 print_dispc_vm(str, &vm); 4409 } 4410 #endif /* PRINT_VERBOSE_VM_TIMINGS */ 4411 4412 static bool dsi_cm_calc_dispc_cb(int lckd, int pckd, unsigned long lck, 4413 unsigned long pck, void *data) 4414 { 4415 struct dsi_clk_calc_ctx *ctx = data; 4416 struct omap_video_timings *t = &ctx->dispc_vm; 4417 4418 ctx->dispc_cinfo.lck_div = lckd; 4419 ctx->dispc_cinfo.pck_div = pckd; 4420 ctx->dispc_cinfo.lck = lck; 4421 ctx->dispc_cinfo.pck = pck; 4422 4423 *t = *ctx->config->timings; 4424 t->pixelclock = pck; 4425 t->x_res = ctx->config->timings->x_res; 4426 t->y_res = ctx->config->timings->y_res; 4427 t->hsw = t->hfp = t->hbp = t->vsw = 1; 4428 t->vfp = t->vbp = 0; 4429 4430 return true; 4431 } 4432 4433 static bool dsi_cm_calc_hsdiv_cb(int m_dispc, unsigned long dispc, 4434 void *data) 4435 { 4436 struct dsi_clk_calc_ctx *ctx = data; 4437 4438 ctx->dsi_cinfo.mX[HSDIV_DISPC] = m_dispc; 4439 ctx->dsi_cinfo.clkout[HSDIV_DISPC] = dispc; 4440 4441 return dispc_div_calc(dispc, ctx->req_pck_min, ctx->req_pck_max, 4442 dsi_cm_calc_dispc_cb, ctx); 4443 } 4444 4445 static bool dsi_cm_calc_pll_cb(int n, int m, unsigned long fint, 4446 unsigned long clkdco, void *data) 4447 { 4448 struct dsi_clk_calc_ctx *ctx = data; 4449 4450 ctx->dsi_cinfo.n = n; 4451 ctx->dsi_cinfo.m = m; 4452 ctx->dsi_cinfo.fint = fint; 4453 ctx->dsi_cinfo.clkdco = clkdco; 4454 4455 return dss_pll_hsdiv_calc(ctx->pll, clkdco, ctx->req_pck_min, 4456 dss_feat_get_param_max(FEAT_PARAM_DSS_FCK), 4457 dsi_cm_calc_hsdiv_cb, ctx); 4458 } 4459 4460 static bool dsi_cm_calc(struct dsi_data *dsi, 4461 const struct omap_dss_dsi_config *cfg, 4462 struct dsi_clk_calc_ctx *ctx) 4463 { 4464 unsigned long clkin; 4465 int bitspp, ndl; 4466 unsigned long pll_min, pll_max; 4467 unsigned long pck, txbyteclk; 4468 4469 clkin = clk_get_rate(dsi->pll.clkin); 4470 bitspp = dsi_get_pixel_size(cfg->pixel_format); 4471 ndl = dsi->num_lanes_used - 1; 4472 4473 /* 4474 * Here we should calculate minimum txbyteclk to be able to send the 4475 * frame in time, and also to handle TE. That's not very simple, though, 4476 * especially as we go to LP between each pixel packet due to HW 4477 * "feature". So let's just estimate very roughly and multiply by 1.5. 4478 */ 4479 pck = cfg->timings->pixelclock; 4480 pck = pck * 3 / 2; 4481 txbyteclk = pck * bitspp / 8 / ndl; 4482 4483 memset(ctx, 0, sizeof(*ctx)); 4484 ctx->dsidev = dsi->pdev; 4485 ctx->pll = &dsi->pll; 4486 ctx->config = cfg; 4487 ctx->req_pck_min = pck; 4488 ctx->req_pck_nom = pck; 4489 ctx->req_pck_max = pck * 3 / 2; 4490 4491 pll_min = max(cfg->hs_clk_min * 4, txbyteclk * 4 * 4); 4492 pll_max = cfg->hs_clk_max * 4; 4493 4494 return dss_pll_calc(ctx->pll, clkin, 4495 pll_min, pll_max, 4496 dsi_cm_calc_pll_cb, ctx); 4497 } 4498 4499 static bool dsi_vm_calc_blanking(struct dsi_clk_calc_ctx *ctx) 4500 { 4501 struct dsi_data *dsi = dsi_get_dsidrv_data(ctx->dsidev); 4502 const struct omap_dss_dsi_config *cfg = ctx->config; 4503 int bitspp = dsi_get_pixel_size(cfg->pixel_format); 4504 int ndl = dsi->num_lanes_used - 1; 4505 unsigned long hsclk = ctx->dsi_cinfo.clkdco / 4; 4506 unsigned long byteclk = hsclk / 4; 4507 4508 unsigned long dispc_pck, req_pck_min, req_pck_nom, req_pck_max; 4509 int xres; 4510 int panel_htot, panel_hbl; /* pixels */ 4511 int dispc_htot, dispc_hbl; /* pixels */ 4512 int dsi_htot, dsi_hact, dsi_hbl, hss, hse; /* byteclks */ 4513 int hfp, hsa, hbp; 4514 const struct omap_video_timings *req_vm; 4515 struct omap_video_timings *dispc_vm; 4516 struct omap_dss_dsi_videomode_timings *dsi_vm; 4517 u64 dsi_tput, dispc_tput; 4518 4519 dsi_tput = (u64)byteclk * ndl * 8; 4520 4521 req_vm = cfg->timings; 4522 req_pck_min = ctx->req_pck_min; 4523 req_pck_max = ctx->req_pck_max; 4524 req_pck_nom = ctx->req_pck_nom; 4525 4526 dispc_pck = ctx->dispc_cinfo.pck; 4527 dispc_tput = (u64)dispc_pck * bitspp; 4528 4529 xres = req_vm->x_res; 4530 4531 panel_hbl = req_vm->hfp + req_vm->hbp + req_vm->hsw; 4532 panel_htot = xres + panel_hbl; 4533 4534 dsi_hact = DIV_ROUND_UP(DIV_ROUND_UP(xres * bitspp, 8) + 6, ndl); 4535 4536 /* 4537 * When there are no line buffers, DISPC and DSI must have the 4538 * same tput. Otherwise DISPC tput needs to be higher than DSI's. 4539 */ 4540 if (dsi->line_buffer_size < xres * bitspp / 8) { 4541 if (dispc_tput != dsi_tput) 4542 return false; 4543 } else { 4544 if (dispc_tput < dsi_tput) 4545 return false; 4546 } 4547 4548 /* DSI tput must be over the min requirement */ 4549 if (dsi_tput < (u64)bitspp * req_pck_min) 4550 return false; 4551 4552 /* When non-burst mode, DSI tput must be below max requirement. */ 4553 if (cfg->trans_mode != OMAP_DSS_DSI_BURST_MODE) { 4554 if (dsi_tput > (u64)bitspp * req_pck_max) 4555 return false; 4556 } 4557 4558 hss = DIV_ROUND_UP(4, ndl); 4559 4560 if (cfg->trans_mode == OMAP_DSS_DSI_PULSE_MODE) { 4561 if (ndl == 3 && req_vm->hsw == 0) 4562 hse = 1; 4563 else 4564 hse = DIV_ROUND_UP(4, ndl); 4565 } else { 4566 hse = 0; 4567 } 4568 4569 /* DSI htot to match the panel's nominal pck */ 4570 dsi_htot = div64_u64((u64)panel_htot * byteclk, req_pck_nom); 4571 4572 /* fail if there would be no time for blanking */ 4573 if (dsi_htot < hss + hse + dsi_hact) 4574 return false; 4575 4576 /* total DSI blanking needed to achieve panel's TL */ 4577 dsi_hbl = dsi_htot - dsi_hact; 4578 4579 /* DISPC htot to match the DSI TL */ 4580 dispc_htot = div64_u64((u64)dsi_htot * dispc_pck, byteclk); 4581 4582 /* verify that the DSI and DISPC TLs are the same */ 4583 if ((u64)dsi_htot * dispc_pck != (u64)dispc_htot * byteclk) 4584 return false; 4585 4586 dispc_hbl = dispc_htot - xres; 4587 4588 /* setup DSI videomode */ 4589 4590 dsi_vm = &ctx->dsi_vm; 4591 memset(dsi_vm, 0, sizeof(*dsi_vm)); 4592 4593 dsi_vm->hsclk = hsclk; 4594 4595 dsi_vm->ndl = ndl; 4596 dsi_vm->bitspp = bitspp; 4597 4598 if (cfg->trans_mode != OMAP_DSS_DSI_PULSE_MODE) { 4599 hsa = 0; 4600 } else if (ndl == 3 && req_vm->hsw == 0) { 4601 hsa = 0; 4602 } else { 4603 hsa = div64_u64((u64)req_vm->hsw * byteclk, req_pck_nom); 4604 hsa = max(hsa - hse, 1); 4605 } 4606 4607 hbp = div64_u64((u64)req_vm->hbp * byteclk, req_pck_nom); 4608 hbp = max(hbp, 1); 4609 4610 hfp = dsi_hbl - (hss + hsa + hse + hbp); 4611 if (hfp < 1) { 4612 int t; 4613 /* we need to take cycles from hbp */ 4614 4615 t = 1 - hfp; 4616 hbp = max(hbp - t, 1); 4617 hfp = dsi_hbl - (hss + hsa + hse + hbp); 4618 4619 if (hfp < 1 && hsa > 0) { 4620 /* we need to take cycles from hsa */ 4621 t = 1 - hfp; 4622 hsa = max(hsa - t, 1); 4623 hfp = dsi_hbl - (hss + hsa + hse + hbp); 4624 } 4625 } 4626 4627 if (hfp < 1) 4628 return false; 4629 4630 dsi_vm->hss = hss; 4631 dsi_vm->hsa = hsa; 4632 dsi_vm->hse = hse; 4633 dsi_vm->hbp = hbp; 4634 dsi_vm->hact = xres; 4635 dsi_vm->hfp = hfp; 4636 4637 dsi_vm->vsa = req_vm->vsw; 4638 dsi_vm->vbp = req_vm->vbp; 4639 dsi_vm->vact = req_vm->y_res; 4640 dsi_vm->vfp = req_vm->vfp; 4641 4642 dsi_vm->trans_mode = cfg->trans_mode; 4643 4644 dsi_vm->blanking_mode = 0; 4645 dsi_vm->hsa_blanking_mode = 1; 4646 dsi_vm->hfp_blanking_mode = 1; 4647 dsi_vm->hbp_blanking_mode = 1; 4648 4649 dsi_vm->ddr_clk_always_on = cfg->ddr_clk_always_on; 4650 dsi_vm->window_sync = 4; 4651 4652 /* setup DISPC videomode */ 4653 4654 dispc_vm = &ctx->dispc_vm; 4655 *dispc_vm = *req_vm; 4656 dispc_vm->pixelclock = dispc_pck; 4657 4658 if (cfg->trans_mode == OMAP_DSS_DSI_PULSE_MODE) { 4659 hsa = div64_u64((u64)req_vm->hsw * dispc_pck, 4660 req_pck_nom); 4661 hsa = max(hsa, 1); 4662 } else { 4663 hsa = 1; 4664 } 4665 4666 hbp = div64_u64((u64)req_vm->hbp * dispc_pck, req_pck_nom); 4667 hbp = max(hbp, 1); 4668 4669 hfp = dispc_hbl - hsa - hbp; 4670 if (hfp < 1) { 4671 int t; 4672 /* we need to take cycles from hbp */ 4673 4674 t = 1 - hfp; 4675 hbp = max(hbp - t, 1); 4676 hfp = dispc_hbl - hsa - hbp; 4677 4678 if (hfp < 1) { 4679 /* we need to take cycles from hsa */ 4680 t = 1 - hfp; 4681 hsa = max(hsa - t, 1); 4682 hfp = dispc_hbl - hsa - hbp; 4683 } 4684 } 4685 4686 if (hfp < 1) 4687 return false; 4688 4689 dispc_vm->hfp = hfp; 4690 dispc_vm->hsw = hsa; 4691 dispc_vm->hbp = hbp; 4692 4693 return true; 4694 } 4695 4696 4697 static bool dsi_vm_calc_dispc_cb(int lckd, int pckd, unsigned long lck, 4698 unsigned long pck, void *data) 4699 { 4700 struct dsi_clk_calc_ctx *ctx = data; 4701 4702 ctx->dispc_cinfo.lck_div = lckd; 4703 ctx->dispc_cinfo.pck_div = pckd; 4704 ctx->dispc_cinfo.lck = lck; 4705 ctx->dispc_cinfo.pck = pck; 4706 4707 if (dsi_vm_calc_blanking(ctx) == false) 4708 return false; 4709 4710 #ifdef PRINT_VERBOSE_VM_TIMINGS 4711 print_dispc_vm("dispc", &ctx->dispc_vm); 4712 print_dsi_vm("dsi ", &ctx->dsi_vm); 4713 print_dispc_vm("req ", ctx->config->timings); 4714 print_dsi_dispc_vm("act ", &ctx->dsi_vm); 4715 #endif 4716 4717 return true; 4718 } 4719 4720 static bool dsi_vm_calc_hsdiv_cb(int m_dispc, unsigned long dispc, 4721 void *data) 4722 { 4723 struct dsi_clk_calc_ctx *ctx = data; 4724 unsigned long pck_max; 4725 4726 ctx->dsi_cinfo.mX[HSDIV_DISPC] = m_dispc; 4727 ctx->dsi_cinfo.clkout[HSDIV_DISPC] = dispc; 4728 4729 /* 4730 * In burst mode we can let the dispc pck be arbitrarily high, but it 4731 * limits our scaling abilities. So for now, don't aim too high. 4732 */ 4733 4734 if (ctx->config->trans_mode == OMAP_DSS_DSI_BURST_MODE) 4735 pck_max = ctx->req_pck_max + 10000000; 4736 else 4737 pck_max = ctx->req_pck_max; 4738 4739 return dispc_div_calc(dispc, ctx->req_pck_min, pck_max, 4740 dsi_vm_calc_dispc_cb, ctx); 4741 } 4742 4743 static bool dsi_vm_calc_pll_cb(int n, int m, unsigned long fint, 4744 unsigned long clkdco, void *data) 4745 { 4746 struct dsi_clk_calc_ctx *ctx = data; 4747 4748 ctx->dsi_cinfo.n = n; 4749 ctx->dsi_cinfo.m = m; 4750 ctx->dsi_cinfo.fint = fint; 4751 ctx->dsi_cinfo.clkdco = clkdco; 4752 4753 return dss_pll_hsdiv_calc(ctx->pll, clkdco, ctx->req_pck_min, 4754 dss_feat_get_param_max(FEAT_PARAM_DSS_FCK), 4755 dsi_vm_calc_hsdiv_cb, ctx); 4756 } 4757 4758 static bool dsi_vm_calc(struct dsi_data *dsi, 4759 const struct omap_dss_dsi_config *cfg, 4760 struct dsi_clk_calc_ctx *ctx) 4761 { 4762 const struct omap_video_timings *t = cfg->timings; 4763 unsigned long clkin; 4764 unsigned long pll_min; 4765 unsigned long pll_max; 4766 int ndl = dsi->num_lanes_used - 1; 4767 int bitspp = dsi_get_pixel_size(cfg->pixel_format); 4768 unsigned long byteclk_min; 4769 4770 clkin = clk_get_rate(dsi->pll.clkin); 4771 4772 memset(ctx, 0, sizeof(*ctx)); 4773 ctx->dsidev = dsi->pdev; 4774 ctx->pll = &dsi->pll; 4775 ctx->config = cfg; 4776 4777 /* these limits should come from the panel driver */ 4778 ctx->req_pck_min = t->pixelclock - 1000; 4779 ctx->req_pck_nom = t->pixelclock; 4780 ctx->req_pck_max = t->pixelclock + 1000; 4781 4782 byteclk_min = div64_u64((u64)ctx->req_pck_min * bitspp, ndl * 8); 4783 pll_min = max(cfg->hs_clk_min * 4, byteclk_min * 4 * 4); 4784 4785 if (cfg->trans_mode == OMAP_DSS_DSI_BURST_MODE) { 4786 pll_max = cfg->hs_clk_max * 4; 4787 } else { 4788 unsigned long byteclk_max; 4789 byteclk_max = div64_u64((u64)ctx->req_pck_max * bitspp, 4790 ndl * 8); 4791 4792 pll_max = byteclk_max * 4 * 4; 4793 } 4794 4795 return dss_pll_calc(ctx->pll, clkin, 4796 pll_min, pll_max, 4797 dsi_vm_calc_pll_cb, ctx); 4798 } 4799 4800 static int dsi_set_config(struct omap_dss_device *dssdev, 4801 const struct omap_dss_dsi_config *config) 4802 { 4803 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 4804 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4805 struct dsi_clk_calc_ctx ctx; 4806 bool ok; 4807 int r; 4808 4809 mutex_lock(&dsi->lock); 4810 4811 dsi->pix_fmt = config->pixel_format; 4812 dsi->mode = config->mode; 4813 4814 if (config->mode == OMAP_DSS_DSI_VIDEO_MODE) 4815 ok = dsi_vm_calc(dsi, config, &ctx); 4816 else 4817 ok = dsi_cm_calc(dsi, config, &ctx); 4818 4819 if (!ok) { 4820 DSSERR("failed to find suitable DSI clock settings\n"); 4821 r = -EINVAL; 4822 goto err; 4823 } 4824 4825 dsi_pll_calc_dsi_fck(&ctx.dsi_cinfo); 4826 4827 r = dsi_lp_clock_calc(ctx.dsi_cinfo.clkout[HSDIV_DSI], 4828 config->lp_clk_min, config->lp_clk_max, &dsi->user_lp_cinfo); 4829 if (r) { 4830 DSSERR("failed to find suitable DSI LP clock settings\n"); 4831 goto err; 4832 } 4833 4834 dsi->user_dsi_cinfo = ctx.dsi_cinfo; 4835 dsi->user_dispc_cinfo = ctx.dispc_cinfo; 4836 4837 dsi->timings = ctx.dispc_vm; 4838 dsi->vm_timings = ctx.dsi_vm; 4839 4840 mutex_unlock(&dsi->lock); 4841 4842 return 0; 4843 err: 4844 mutex_unlock(&dsi->lock); 4845 4846 return r; 4847 } 4848 4849 /* 4850 * Return a hardcoded channel for the DSI output. This should work for 4851 * current use cases, but this can be later expanded to either resolve 4852 * the channel in some more dynamic manner, or get the channel as a user 4853 * parameter. 4854 */ 4855 static enum omap_channel dsi_get_channel(int module_id) 4856 { 4857 switch (omapdss_get_version()) { 4858 case OMAPDSS_VER_OMAP24xx: 4859 case OMAPDSS_VER_AM43xx: 4860 DSSWARN("DSI not supported\n"); 4861 return OMAP_DSS_CHANNEL_LCD; 4862 4863 case OMAPDSS_VER_OMAP34xx_ES1: 4864 case OMAPDSS_VER_OMAP34xx_ES3: 4865 case OMAPDSS_VER_OMAP3630: 4866 case OMAPDSS_VER_AM35xx: 4867 return OMAP_DSS_CHANNEL_LCD; 4868 4869 case OMAPDSS_VER_OMAP4430_ES1: 4870 case OMAPDSS_VER_OMAP4430_ES2: 4871 case OMAPDSS_VER_OMAP4: 4872 switch (module_id) { 4873 case 0: 4874 return OMAP_DSS_CHANNEL_LCD; 4875 case 1: 4876 return OMAP_DSS_CHANNEL_LCD2; 4877 default: 4878 DSSWARN("unsupported module id\n"); 4879 return OMAP_DSS_CHANNEL_LCD; 4880 } 4881 4882 case OMAPDSS_VER_OMAP5: 4883 switch (module_id) { 4884 case 0: 4885 return OMAP_DSS_CHANNEL_LCD; 4886 case 1: 4887 return OMAP_DSS_CHANNEL_LCD3; 4888 default: 4889 DSSWARN("unsupported module id\n"); 4890 return OMAP_DSS_CHANNEL_LCD; 4891 } 4892 4893 default: 4894 DSSWARN("unsupported DSS version\n"); 4895 return OMAP_DSS_CHANNEL_LCD; 4896 } 4897 } 4898 4899 static int dsi_request_vc(struct omap_dss_device *dssdev, int *channel) 4900 { 4901 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 4902 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4903 int i; 4904 4905 for (i = 0; i < ARRAY_SIZE(dsi->vc); i++) { 4906 if (!dsi->vc[i].dssdev) { 4907 dsi->vc[i].dssdev = dssdev; 4908 *channel = i; 4909 return 0; 4910 } 4911 } 4912 4913 DSSERR("cannot get VC for display %s", dssdev->name); 4914 return -ENOSPC; 4915 } 4916 4917 static int dsi_set_vc_id(struct omap_dss_device *dssdev, int channel, int vc_id) 4918 { 4919 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 4920 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4921 4922 if (vc_id < 0 || vc_id > 3) { 4923 DSSERR("VC ID out of range\n"); 4924 return -EINVAL; 4925 } 4926 4927 if (channel < 0 || channel > 3) { 4928 DSSERR("Virtual Channel out of range\n"); 4929 return -EINVAL; 4930 } 4931 4932 if (dsi->vc[channel].dssdev != dssdev) { 4933 DSSERR("Virtual Channel not allocated to display %s\n", 4934 dssdev->name); 4935 return -EINVAL; 4936 } 4937 4938 dsi->vc[channel].vc_id = vc_id; 4939 4940 return 0; 4941 } 4942 4943 static void dsi_release_vc(struct omap_dss_device *dssdev, int channel) 4944 { 4945 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 4946 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4947 4948 if ((channel >= 0 && channel <= 3) && 4949 dsi->vc[channel].dssdev == dssdev) { 4950 dsi->vc[channel].dssdev = NULL; 4951 dsi->vc[channel].vc_id = 0; 4952 } 4953 } 4954 4955 4956 static int dsi_get_clocks(struct platform_device *dsidev) 4957 { 4958 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 4959 struct clk *clk; 4960 4961 clk = devm_clk_get(&dsidev->dev, "fck"); 4962 if (IS_ERR(clk)) { 4963 DSSERR("can't get fck\n"); 4964 return PTR_ERR(clk); 4965 } 4966 4967 dsi->dss_clk = clk; 4968 4969 return 0; 4970 } 4971 4972 static int dsi_connect(struct omap_dss_device *dssdev, 4973 struct omap_dss_device *dst) 4974 { 4975 struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev); 4976 struct omap_overlay_manager *mgr; 4977 int r; 4978 4979 r = dsi_regulator_init(dsidev); 4980 if (r) 4981 return r; 4982 4983 mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel); 4984 if (!mgr) 4985 return -ENODEV; 4986 4987 r = dss_mgr_connect(mgr, dssdev); 4988 if (r) 4989 return r; 4990 4991 r = omapdss_output_set_device(dssdev, dst); 4992 if (r) { 4993 DSSERR("failed to connect output to new device: %s\n", 4994 dssdev->name); 4995 dss_mgr_disconnect(mgr, dssdev); 4996 return r; 4997 } 4998 4999 return 0; 5000 } 5001 5002 static void dsi_disconnect(struct omap_dss_device *dssdev, 5003 struct omap_dss_device *dst) 5004 { 5005 WARN_ON(dst != dssdev->dst); 5006 5007 if (dst != dssdev->dst) 5008 return; 5009 5010 omapdss_output_unset_device(dssdev); 5011 5012 if (dssdev->manager) 5013 dss_mgr_disconnect(dssdev->manager, dssdev); 5014 } 5015 5016 static const struct omapdss_dsi_ops dsi_ops = { 5017 .connect = dsi_connect, 5018 .disconnect = dsi_disconnect, 5019 5020 .bus_lock = dsi_bus_lock, 5021 .bus_unlock = dsi_bus_unlock, 5022 5023 .enable = dsi_display_enable, 5024 .disable = dsi_display_disable, 5025 5026 .enable_hs = dsi_vc_enable_hs, 5027 5028 .configure_pins = dsi_configure_pins, 5029 .set_config = dsi_set_config, 5030 5031 .enable_video_output = dsi_enable_video_output, 5032 .disable_video_output = dsi_disable_video_output, 5033 5034 .update = dsi_update, 5035 5036 .enable_te = dsi_enable_te, 5037 5038 .request_vc = dsi_request_vc, 5039 .set_vc_id = dsi_set_vc_id, 5040 .release_vc = dsi_release_vc, 5041 5042 .dcs_write = dsi_vc_dcs_write, 5043 .dcs_write_nosync = dsi_vc_dcs_write_nosync, 5044 .dcs_read = dsi_vc_dcs_read, 5045 5046 .gen_write = dsi_vc_generic_write, 5047 .gen_write_nosync = dsi_vc_generic_write_nosync, 5048 .gen_read = dsi_vc_generic_read, 5049 5050 .bta_sync = dsi_vc_send_bta_sync, 5051 5052 .set_max_rx_packet_size = dsi_vc_set_max_rx_packet_size, 5053 }; 5054 5055 static void dsi_init_output(struct platform_device *dsidev) 5056 { 5057 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 5058 struct omap_dss_device *out = &dsi->output; 5059 5060 out->dev = &dsidev->dev; 5061 out->id = dsi->module_id == 0 ? 5062 OMAP_DSS_OUTPUT_DSI1 : OMAP_DSS_OUTPUT_DSI2; 5063 5064 out->output_type = OMAP_DISPLAY_TYPE_DSI; 5065 out->name = dsi->module_id == 0 ? "dsi.0" : "dsi.1"; 5066 out->dispc_channel = dsi_get_channel(dsi->module_id); 5067 out->ops.dsi = &dsi_ops; 5068 out->owner = THIS_MODULE; 5069 5070 omapdss_register_output(out); 5071 } 5072 5073 static void dsi_uninit_output(struct platform_device *dsidev) 5074 { 5075 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 5076 struct omap_dss_device *out = &dsi->output; 5077 5078 omapdss_unregister_output(out); 5079 } 5080 5081 static int dsi_probe_of(struct platform_device *pdev) 5082 { 5083 struct device_node *node = pdev->dev.of_node; 5084 struct dsi_data *dsi = dsi_get_dsidrv_data(pdev); 5085 struct property *prop; 5086 u32 lane_arr[10]; 5087 int len, num_pins; 5088 int r, i; 5089 struct device_node *ep; 5090 struct omap_dsi_pin_config pin_cfg; 5091 5092 ep = omapdss_of_get_first_endpoint(node); 5093 if (!ep) 5094 return 0; 5095 5096 prop = of_find_property(ep, "lanes", &len); 5097 if (prop == NULL) { 5098 dev_err(&pdev->dev, "failed to find lane data\n"); 5099 r = -EINVAL; 5100 goto err; 5101 } 5102 5103 num_pins = len / sizeof(u32); 5104 5105 if (num_pins < 4 || num_pins % 2 != 0 || 5106 num_pins > dsi->num_lanes_supported * 2) { 5107 dev_err(&pdev->dev, "bad number of lanes\n"); 5108 r = -EINVAL; 5109 goto err; 5110 } 5111 5112 r = of_property_read_u32_array(ep, "lanes", lane_arr, num_pins); 5113 if (r) { 5114 dev_err(&pdev->dev, "failed to read lane data\n"); 5115 goto err; 5116 } 5117 5118 pin_cfg.num_pins = num_pins; 5119 for (i = 0; i < num_pins; ++i) 5120 pin_cfg.pins[i] = (int)lane_arr[i]; 5121 5122 r = dsi_configure_pins(&dsi->output, &pin_cfg); 5123 if (r) { 5124 dev_err(&pdev->dev, "failed to configure pins"); 5125 goto err; 5126 } 5127 5128 of_node_put(ep); 5129 5130 return 0; 5131 5132 err: 5133 of_node_put(ep); 5134 return r; 5135 } 5136 5137 static const struct dss_pll_ops dsi_pll_ops = { 5138 .enable = dsi_pll_enable, 5139 .disable = dsi_pll_disable, 5140 .set_config = dss_pll_write_config_type_a, 5141 }; 5142 5143 static const struct dss_pll_hw dss_omap3_dsi_pll_hw = { 5144 .n_max = (1 << 7) - 1, 5145 .m_max = (1 << 11) - 1, 5146 .mX_max = (1 << 4) - 1, 5147 .fint_min = 750000, 5148 .fint_max = 2100000, 5149 .clkdco_low = 1000000000, 5150 .clkdco_max = 1800000000, 5151 5152 .n_msb = 7, 5153 .n_lsb = 1, 5154 .m_msb = 18, 5155 .m_lsb = 8, 5156 5157 .mX_msb[0] = 22, 5158 .mX_lsb[0] = 19, 5159 .mX_msb[1] = 26, 5160 .mX_lsb[1] = 23, 5161 5162 .has_stopmode = true, 5163 .has_freqsel = true, 5164 .has_selfreqdco = false, 5165 .has_refsel = false, 5166 }; 5167 5168 static const struct dss_pll_hw dss_omap4_dsi_pll_hw = { 5169 .n_max = (1 << 8) - 1, 5170 .m_max = (1 << 12) - 1, 5171 .mX_max = (1 << 5) - 1, 5172 .fint_min = 500000, 5173 .fint_max = 2500000, 5174 .clkdco_low = 1000000000, 5175 .clkdco_max = 1800000000, 5176 5177 .n_msb = 8, 5178 .n_lsb = 1, 5179 .m_msb = 20, 5180 .m_lsb = 9, 5181 5182 .mX_msb[0] = 25, 5183 .mX_lsb[0] = 21, 5184 .mX_msb[1] = 30, 5185 .mX_lsb[1] = 26, 5186 5187 .has_stopmode = true, 5188 .has_freqsel = false, 5189 .has_selfreqdco = false, 5190 .has_refsel = false, 5191 }; 5192 5193 static const struct dss_pll_hw dss_omap5_dsi_pll_hw = { 5194 .n_max = (1 << 8) - 1, 5195 .m_max = (1 << 12) - 1, 5196 .mX_max = (1 << 5) - 1, 5197 .fint_min = 150000, 5198 .fint_max = 52000000, 5199 .clkdco_low = 1000000000, 5200 .clkdco_max = 1800000000, 5201 5202 .n_msb = 8, 5203 .n_lsb = 1, 5204 .m_msb = 20, 5205 .m_lsb = 9, 5206 5207 .mX_msb[0] = 25, 5208 .mX_lsb[0] = 21, 5209 .mX_msb[1] = 30, 5210 .mX_lsb[1] = 26, 5211 5212 .has_stopmode = true, 5213 .has_freqsel = false, 5214 .has_selfreqdco = true, 5215 .has_refsel = true, 5216 }; 5217 5218 static int dsi_init_pll_data(struct platform_device *dsidev) 5219 { 5220 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 5221 struct dss_pll *pll = &dsi->pll; 5222 struct clk *clk; 5223 int r; 5224 5225 clk = devm_clk_get(&dsidev->dev, "sys_clk"); 5226 if (IS_ERR(clk)) { 5227 DSSERR("can't get sys_clk\n"); 5228 return PTR_ERR(clk); 5229 } 5230 5231 pll->name = dsi->module_id == 0 ? "dsi0" : "dsi1"; 5232 pll->id = dsi->module_id == 0 ? DSS_PLL_DSI1 : DSS_PLL_DSI2; 5233 pll->clkin = clk; 5234 pll->base = dsi->pll_base; 5235 5236 switch (omapdss_get_version()) { 5237 case OMAPDSS_VER_OMAP34xx_ES1: 5238 case OMAPDSS_VER_OMAP34xx_ES3: 5239 case OMAPDSS_VER_OMAP3630: 5240 case OMAPDSS_VER_AM35xx: 5241 pll->hw = &dss_omap3_dsi_pll_hw; 5242 break; 5243 5244 case OMAPDSS_VER_OMAP4430_ES1: 5245 case OMAPDSS_VER_OMAP4430_ES2: 5246 case OMAPDSS_VER_OMAP4: 5247 pll->hw = &dss_omap4_dsi_pll_hw; 5248 break; 5249 5250 case OMAPDSS_VER_OMAP5: 5251 pll->hw = &dss_omap5_dsi_pll_hw; 5252 break; 5253 5254 default: 5255 return -ENODEV; 5256 } 5257 5258 pll->ops = &dsi_pll_ops; 5259 5260 r = dss_pll_register(pll); 5261 if (r) 5262 return r; 5263 5264 return 0; 5265 } 5266 5267 /* DSI1 HW IP initialisation */ 5268 static int dsi_bind(struct device *dev, struct device *master, void *data) 5269 { 5270 struct platform_device *dsidev = to_platform_device(dev); 5271 u32 rev; 5272 int r, i; 5273 struct dsi_data *dsi; 5274 struct resource *dsi_mem; 5275 struct resource *res; 5276 struct resource temp_res; 5277 5278 dsi = devm_kzalloc(&dsidev->dev, sizeof(*dsi), GFP_KERNEL); 5279 if (!dsi) 5280 return -ENOMEM; 5281 5282 dsi->pdev = dsidev; 5283 dev_set_drvdata(&dsidev->dev, dsi); 5284 5285 spin_lock_init(&dsi->irq_lock); 5286 spin_lock_init(&dsi->errors_lock); 5287 dsi->errors = 0; 5288 5289 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS 5290 spin_lock_init(&dsi->irq_stats_lock); 5291 dsi->irq_stats.last_reset = jiffies; 5292 #endif 5293 5294 mutex_init(&dsi->lock); 5295 sema_init(&dsi->bus_lock, 1); 5296 5297 INIT_DEFERRABLE_WORK(&dsi->framedone_timeout_work, 5298 dsi_framedone_timeout_work_callback); 5299 5300 #ifdef DSI_CATCH_MISSING_TE 5301 init_timer(&dsi->te_timer); 5302 dsi->te_timer.function = dsi_te_timeout; 5303 dsi->te_timer.data = 0; 5304 #endif 5305 5306 res = platform_get_resource_byname(dsidev, IORESOURCE_MEM, "proto"); 5307 if (!res) { 5308 res = platform_get_resource(dsidev, IORESOURCE_MEM, 0); 5309 if (!res) { 5310 DSSERR("can't get IORESOURCE_MEM DSI\n"); 5311 return -EINVAL; 5312 } 5313 5314 temp_res.start = res->start; 5315 temp_res.end = temp_res.start + DSI_PROTO_SZ - 1; 5316 res = &temp_res; 5317 } 5318 5319 dsi_mem = res; 5320 5321 dsi->proto_base = devm_ioremap(&dsidev->dev, res->start, 5322 resource_size(res)); 5323 if (!dsi->proto_base) { 5324 DSSERR("can't ioremap DSI protocol engine\n"); 5325 return -ENOMEM; 5326 } 5327 5328 res = platform_get_resource_byname(dsidev, IORESOURCE_MEM, "phy"); 5329 if (!res) { 5330 res = platform_get_resource(dsidev, IORESOURCE_MEM, 0); 5331 if (!res) { 5332 DSSERR("can't get IORESOURCE_MEM DSI\n"); 5333 return -EINVAL; 5334 } 5335 5336 temp_res.start = res->start + DSI_PHY_OFFSET; 5337 temp_res.end = temp_res.start + DSI_PHY_SZ - 1; 5338 res = &temp_res; 5339 } 5340 5341 dsi->phy_base = devm_ioremap(&dsidev->dev, res->start, 5342 resource_size(res)); 5343 if (!dsi->phy_base) { 5344 DSSERR("can't ioremap DSI PHY\n"); 5345 return -ENOMEM; 5346 } 5347 5348 res = platform_get_resource_byname(dsidev, IORESOURCE_MEM, "pll"); 5349 if (!res) { 5350 res = platform_get_resource(dsidev, IORESOURCE_MEM, 0); 5351 if (!res) { 5352 DSSERR("can't get IORESOURCE_MEM DSI\n"); 5353 return -EINVAL; 5354 } 5355 5356 temp_res.start = res->start + DSI_PLL_OFFSET; 5357 temp_res.end = temp_res.start + DSI_PLL_SZ - 1; 5358 res = &temp_res; 5359 } 5360 5361 dsi->pll_base = devm_ioremap(&dsidev->dev, res->start, 5362 resource_size(res)); 5363 if (!dsi->pll_base) { 5364 DSSERR("can't ioremap DSI PLL\n"); 5365 return -ENOMEM; 5366 } 5367 5368 dsi->irq = platform_get_irq(dsi->pdev, 0); 5369 if (dsi->irq < 0) { 5370 DSSERR("platform_get_irq failed\n"); 5371 return -ENODEV; 5372 } 5373 5374 r = devm_request_irq(&dsidev->dev, dsi->irq, omap_dsi_irq_handler, 5375 IRQF_SHARED, dev_name(&dsidev->dev), dsi->pdev); 5376 if (r < 0) { 5377 DSSERR("request_irq failed\n"); 5378 return r; 5379 } 5380 5381 if (dsidev->dev.of_node) { 5382 const struct of_device_id *match; 5383 const struct dsi_module_id_data *d; 5384 5385 match = of_match_node(dsi_of_match, dsidev->dev.of_node); 5386 if (!match) { 5387 DSSERR("unsupported DSI module\n"); 5388 return -ENODEV; 5389 } 5390 5391 d = match->data; 5392 5393 while (d->address != 0 && d->address != dsi_mem->start) 5394 d++; 5395 5396 if (d->address == 0) { 5397 DSSERR("unsupported DSI module\n"); 5398 return -ENODEV; 5399 } 5400 5401 dsi->module_id = d->id; 5402 } else { 5403 dsi->module_id = dsidev->id; 5404 } 5405 5406 /* DSI VCs initialization */ 5407 for (i = 0; i < ARRAY_SIZE(dsi->vc); i++) { 5408 dsi->vc[i].source = DSI_VC_SOURCE_L4; 5409 dsi->vc[i].dssdev = NULL; 5410 dsi->vc[i].vc_id = 0; 5411 } 5412 5413 r = dsi_get_clocks(dsidev); 5414 if (r) 5415 return r; 5416 5417 dsi_init_pll_data(dsidev); 5418 5419 pm_runtime_enable(&dsidev->dev); 5420 5421 r = dsi_runtime_get(dsidev); 5422 if (r) 5423 goto err_runtime_get; 5424 5425 rev = dsi_read_reg(dsidev, DSI_REVISION); 5426 dev_dbg(&dsidev->dev, "OMAP DSI rev %d.%d\n", 5427 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0)); 5428 5429 /* DSI on OMAP3 doesn't have register DSI_GNQ, set number 5430 * of data to 3 by default */ 5431 if (dss_has_feature(FEAT_DSI_GNQ)) 5432 /* NB_DATA_LANES */ 5433 dsi->num_lanes_supported = 1 + REG_GET(dsidev, DSI_GNQ, 11, 9); 5434 else 5435 dsi->num_lanes_supported = 3; 5436 5437 dsi->line_buffer_size = dsi_get_line_buf_size(dsidev); 5438 5439 dsi_init_output(dsidev); 5440 5441 if (dsidev->dev.of_node) { 5442 r = dsi_probe_of(dsidev); 5443 if (r) { 5444 DSSERR("Invalid DSI DT data\n"); 5445 goto err_probe_of; 5446 } 5447 5448 r = of_platform_populate(dsidev->dev.of_node, NULL, NULL, 5449 &dsidev->dev); 5450 if (r) 5451 DSSERR("Failed to populate DSI child devices: %d\n", r); 5452 } 5453 5454 dsi_runtime_put(dsidev); 5455 5456 if (dsi->module_id == 0) 5457 dss_debugfs_create_file("dsi1_regs", dsi1_dump_regs); 5458 else if (dsi->module_id == 1) 5459 dss_debugfs_create_file("dsi2_regs", dsi2_dump_regs); 5460 5461 #ifdef CONFIG_FB_OMAP2_DSS_COLLECT_IRQ_STATS 5462 if (dsi->module_id == 0) 5463 dss_debugfs_create_file("dsi1_irqs", dsi1_dump_irqs); 5464 else if (dsi->module_id == 1) 5465 dss_debugfs_create_file("dsi2_irqs", dsi2_dump_irqs); 5466 #endif 5467 5468 return 0; 5469 5470 err_probe_of: 5471 dsi_uninit_output(dsidev); 5472 dsi_runtime_put(dsidev); 5473 5474 err_runtime_get: 5475 pm_runtime_disable(&dsidev->dev); 5476 return r; 5477 } 5478 5479 static void dsi_unbind(struct device *dev, struct device *master, void *data) 5480 { 5481 struct platform_device *dsidev = to_platform_device(dev); 5482 struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev); 5483 5484 of_platform_depopulate(&dsidev->dev); 5485 5486 WARN_ON(dsi->scp_clk_refcount > 0); 5487 5488 dss_pll_unregister(&dsi->pll); 5489 5490 dsi_uninit_output(dsidev); 5491 5492 pm_runtime_disable(&dsidev->dev); 5493 5494 if (dsi->vdds_dsi_reg != NULL && dsi->vdds_dsi_enabled) { 5495 regulator_disable(dsi->vdds_dsi_reg); 5496 dsi->vdds_dsi_enabled = false; 5497 } 5498 } 5499 5500 static const struct component_ops dsi_component_ops = { 5501 .bind = dsi_bind, 5502 .unbind = dsi_unbind, 5503 }; 5504 5505 static int dsi_probe(struct platform_device *pdev) 5506 { 5507 return component_add(&pdev->dev, &dsi_component_ops); 5508 } 5509 5510 static int dsi_remove(struct platform_device *pdev) 5511 { 5512 component_del(&pdev->dev, &dsi_component_ops); 5513 return 0; 5514 } 5515 5516 static int dsi_runtime_suspend(struct device *dev) 5517 { 5518 struct platform_device *pdev = to_platform_device(dev); 5519 struct dsi_data *dsi = dsi_get_dsidrv_data(pdev); 5520 5521 dsi->is_enabled = false; 5522 /* ensure the irq handler sees the is_enabled value */ 5523 smp_wmb(); 5524 /* wait for current handler to finish before turning the DSI off */ 5525 synchronize_irq(dsi->irq); 5526 5527 dispc_runtime_put(); 5528 5529 return 0; 5530 } 5531 5532 static int dsi_runtime_resume(struct device *dev) 5533 { 5534 struct platform_device *pdev = to_platform_device(dev); 5535 struct dsi_data *dsi = dsi_get_dsidrv_data(pdev); 5536 int r; 5537 5538 r = dispc_runtime_get(); 5539 if (r) 5540 return r; 5541 5542 dsi->is_enabled = true; 5543 /* ensure the irq handler sees the is_enabled value */ 5544 smp_wmb(); 5545 5546 return 0; 5547 } 5548 5549 static const struct dev_pm_ops dsi_pm_ops = { 5550 .runtime_suspend = dsi_runtime_suspend, 5551 .runtime_resume = dsi_runtime_resume, 5552 }; 5553 5554 static const struct dsi_module_id_data dsi_of_data_omap3[] = { 5555 { .address = 0x4804fc00, .id = 0, }, 5556 { }, 5557 }; 5558 5559 static const struct dsi_module_id_data dsi_of_data_omap4[] = { 5560 { .address = 0x58004000, .id = 0, }, 5561 { .address = 0x58005000, .id = 1, }, 5562 { }, 5563 }; 5564 5565 static const struct dsi_module_id_data dsi_of_data_omap5[] = { 5566 { .address = 0x58004000, .id = 0, }, 5567 { .address = 0x58009000, .id = 1, }, 5568 { }, 5569 }; 5570 5571 static const struct of_device_id dsi_of_match[] = { 5572 { .compatible = "ti,omap3-dsi", .data = dsi_of_data_omap3, }, 5573 { .compatible = "ti,omap4-dsi", .data = dsi_of_data_omap4, }, 5574 { .compatible = "ti,omap5-dsi", .data = dsi_of_data_omap5, }, 5575 {}, 5576 }; 5577 5578 static struct platform_driver omap_dsihw_driver = { 5579 .probe = dsi_probe, 5580 .remove = dsi_remove, 5581 .driver = { 5582 .name = "omapdss_dsi", 5583 .pm = &dsi_pm_ops, 5584 .of_match_table = dsi_of_match, 5585 .suppress_bind_attrs = true, 5586 }, 5587 }; 5588 5589 int __init dsi_init_platform_driver(void) 5590 { 5591 return platform_driver_register(&omap_dsihw_driver); 5592 } 5593 5594 void dsi_uninit_platform_driver(void) 5595 { 5596 platform_driver_unregister(&omap_dsihw_driver); 5597 } 5598