1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Microchip eXtended Image Sensor Controller (XISC) driver 4 * 5 * Copyright (C) 2019-2021 Microchip Technology, Inc. and its subsidiaries 6 * 7 * Author: Eugen Hristev <eugen.hristev@microchip.com> 8 * 9 * Sensor-->PFE-->DPC-->WB-->CFA-->CC-->GAM-->VHXS-->CSC-->CBHS-->SUB-->RLP-->DMA-->HIS 10 * 11 * ISC video pipeline integrates the following submodules: 12 * PFE: Parallel Front End to sample the camera sensor input stream 13 * DPC: Defective Pixel Correction with black offset correction, green disparity 14 * correction and defective pixel correction (3 modules total) 15 * WB: Programmable white balance in the Bayer domain 16 * CFA: Color filter array interpolation module 17 * CC: Programmable color correction 18 * GAM: Gamma correction 19 *VHXS: Vertical and Horizontal Scaler 20 * CSC: Programmable color space conversion 21 *CBHS: Contrast Brightness Hue and Saturation control 22 * SUB: This module performs YCbCr444 to YCbCr420 chrominance subsampling 23 * RLP: This module performs rounding, range limiting 24 * and packing of the incoming data 25 * DMA: This module performs DMA master accesses to write frames to external RAM 26 * HIS: Histogram module performs statistic counters on the frames 27 */ 28 29 #include <linux/clk.h> 30 #include <linux/clkdev.h> 31 #include <linux/clk-provider.h> 32 #include <linux/delay.h> 33 #include <linux/interrupt.h> 34 #include <linux/math64.h> 35 #include <linux/module.h> 36 #include <linux/of.h> 37 #include <linux/of_graph.h> 38 #include <linux/platform_device.h> 39 #include <linux/pm_runtime.h> 40 #include <linux/regmap.h> 41 #include <linux/videodev2.h> 42 43 #include <media/v4l2-ctrls.h> 44 #include <media/v4l2-device.h> 45 #include <media/v4l2-event.h> 46 #include <media/v4l2-image-sizes.h> 47 #include <media/v4l2-ioctl.h> 48 #include <media/v4l2-fwnode.h> 49 #include <media/v4l2-subdev.h> 50 #include <media/videobuf2-dma-contig.h> 51 52 #include "microchip-isc-regs.h" 53 #include "microchip-isc.h" 54 55 #define ISC_SAMA7G5_MAX_SUPPORT_WIDTH 3264 56 #define ISC_SAMA7G5_MAX_SUPPORT_HEIGHT 2464 57 58 #define ISC_SAMA7G5_PIPELINE \ 59 (WB_ENABLE | CFA_ENABLE | CC_ENABLE | GAM_ENABLES | CSC_ENABLE | \ 60 CBC_ENABLE | SUB422_ENABLE | SUB420_ENABLE) 61 62 /* This is a list of the formats that the ISC can *output* */ 63 static const struct isc_format sama7g5_controller_formats[] = { 64 { 65 .fourcc = V4L2_PIX_FMT_ARGB444, 66 }, { 67 .fourcc = V4L2_PIX_FMT_ARGB555, 68 }, { 69 .fourcc = V4L2_PIX_FMT_RGB565, 70 }, { 71 .fourcc = V4L2_PIX_FMT_ABGR32, 72 }, { 73 .fourcc = V4L2_PIX_FMT_XBGR32, 74 }, { 75 .fourcc = V4L2_PIX_FMT_YUV420, 76 }, { 77 .fourcc = V4L2_PIX_FMT_UYVY, 78 }, { 79 .fourcc = V4L2_PIX_FMT_VYUY, 80 }, { 81 .fourcc = V4L2_PIX_FMT_YUYV, 82 }, { 83 .fourcc = V4L2_PIX_FMT_YUV422P, 84 }, { 85 .fourcc = V4L2_PIX_FMT_GREY, 86 }, { 87 .fourcc = V4L2_PIX_FMT_Y10, 88 }, { 89 .fourcc = V4L2_PIX_FMT_Y16, 90 }, { 91 .fourcc = V4L2_PIX_FMT_SBGGR8, 92 .raw = true, 93 }, { 94 .fourcc = V4L2_PIX_FMT_SGBRG8, 95 .raw = true, 96 }, { 97 .fourcc = V4L2_PIX_FMT_SGRBG8, 98 .raw = true, 99 }, { 100 .fourcc = V4L2_PIX_FMT_SRGGB8, 101 .raw = true, 102 }, { 103 .fourcc = V4L2_PIX_FMT_SBGGR10, 104 .raw = true, 105 }, { 106 .fourcc = V4L2_PIX_FMT_SGBRG10, 107 .raw = true, 108 }, { 109 .fourcc = V4L2_PIX_FMT_SGRBG10, 110 .raw = true, 111 }, { 112 .fourcc = V4L2_PIX_FMT_SRGGB10, 113 .raw = true, 114 }, { 115 .fourcc = V4L2_PIX_FMT_SBGGR12, 116 .raw = true, 117 }, { 118 .fourcc = V4L2_PIX_FMT_SGBRG12, 119 .raw = true, 120 }, { 121 .fourcc = V4L2_PIX_FMT_SGRBG12, 122 .raw = true, 123 }, { 124 .fourcc = V4L2_PIX_FMT_SRGGB12, 125 .raw = true, 126 }, 127 }; 128 129 /* This is a list of formats that the ISC can receive as *input* */ 130 static struct isc_format sama7g5_formats_list[] = { 131 { 132 .fourcc = V4L2_PIX_FMT_SBGGR8, 133 .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8, 134 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, 135 .cfa_baycfg = ISC_BAY_CFG_BGBG, 136 }, 137 { 138 .fourcc = V4L2_PIX_FMT_SGBRG8, 139 .mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8, 140 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, 141 .cfa_baycfg = ISC_BAY_CFG_GBGB, 142 }, 143 { 144 .fourcc = V4L2_PIX_FMT_SGRBG8, 145 .mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8, 146 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, 147 .cfa_baycfg = ISC_BAY_CFG_GRGR, 148 }, 149 { 150 .fourcc = V4L2_PIX_FMT_SRGGB8, 151 .mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8, 152 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, 153 .cfa_baycfg = ISC_BAY_CFG_RGRG, 154 }, 155 { 156 .fourcc = V4L2_PIX_FMT_SBGGR10, 157 .mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10, 158 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, 159 .cfa_baycfg = ISC_BAY_CFG_RGRG, 160 }, 161 { 162 .fourcc = V4L2_PIX_FMT_SGBRG10, 163 .mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10, 164 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, 165 .cfa_baycfg = ISC_BAY_CFG_GBGB, 166 }, 167 { 168 .fourcc = V4L2_PIX_FMT_SGRBG10, 169 .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10, 170 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, 171 .cfa_baycfg = ISC_BAY_CFG_GRGR, 172 }, 173 { 174 .fourcc = V4L2_PIX_FMT_SRGGB10, 175 .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10, 176 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, 177 .cfa_baycfg = ISC_BAY_CFG_RGRG, 178 }, 179 { 180 .fourcc = V4L2_PIX_FMT_SBGGR12, 181 .mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12, 182 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, 183 .cfa_baycfg = ISC_BAY_CFG_BGBG, 184 }, 185 { 186 .fourcc = V4L2_PIX_FMT_SGBRG12, 187 .mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12, 188 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, 189 .cfa_baycfg = ISC_BAY_CFG_GBGB, 190 }, 191 { 192 .fourcc = V4L2_PIX_FMT_SGRBG12, 193 .mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12, 194 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, 195 .cfa_baycfg = ISC_BAY_CFG_GRGR, 196 }, 197 { 198 .fourcc = V4L2_PIX_FMT_SRGGB12, 199 .mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12, 200 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, 201 .cfa_baycfg = ISC_BAY_CFG_RGRG, 202 }, 203 { 204 .fourcc = V4L2_PIX_FMT_GREY, 205 .mbus_code = MEDIA_BUS_FMT_Y8_1X8, 206 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, 207 }, 208 { 209 .fourcc = V4L2_PIX_FMT_YUYV, 210 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 211 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, 212 }, 213 { 214 .fourcc = V4L2_PIX_FMT_UYVY, 215 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 216 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, 217 }, 218 { 219 .fourcc = V4L2_PIX_FMT_RGB565, 220 .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE, 221 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, 222 }, 223 { 224 .fourcc = V4L2_PIX_FMT_Y10, 225 .mbus_code = MEDIA_BUS_FMT_Y10_1X10, 226 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, 227 }, 228 }; 229 230 static void isc_sama7g5_config_csc(struct isc_device *isc) 231 { 232 struct regmap *regmap = isc->regmap; 233 234 /* Convert RGB to YUV */ 235 regmap_write(regmap, ISC_CSC_YR_YG + isc->offsets.csc, 236 0x42 | (0x81 << 16)); 237 regmap_write(regmap, ISC_CSC_YB_OY + isc->offsets.csc, 238 0x19 | (0x10 << 16)); 239 regmap_write(regmap, ISC_CSC_CBR_CBG + isc->offsets.csc, 240 0xFDA | (0xFB6 << 16)); 241 regmap_write(regmap, ISC_CSC_CBB_OCB + isc->offsets.csc, 242 0x70 | (0x80 << 16)); 243 regmap_write(regmap, ISC_CSC_CRR_CRG + isc->offsets.csc, 244 0x70 | (0xFA2 << 16)); 245 regmap_write(regmap, ISC_CSC_CRB_OCR + isc->offsets.csc, 246 0xFEE | (0x80 << 16)); 247 } 248 249 static void isc_sama7g5_config_cbc(struct isc_device *isc) 250 { 251 struct regmap *regmap = isc->regmap; 252 253 /* Configure what is set via v4l2 ctrls */ 254 regmap_write(regmap, ISC_CBC_BRIGHT + isc->offsets.cbc, isc->ctrls.brightness); 255 regmap_write(regmap, ISC_CBC_CONTRAST + isc->offsets.cbc, isc->ctrls.contrast); 256 /* Configure Hue and Saturation as neutral midpoint */ 257 regmap_write(regmap, ISC_CBCHS_HUE, 0); 258 regmap_write(regmap, ISC_CBCHS_SAT, (1 << 4)); 259 } 260 261 static void isc_sama7g5_config_cc(struct isc_device *isc) 262 { 263 struct regmap *regmap = isc->regmap; 264 265 /* Configure each register at the neutral fixed point 1.0 or 0.0 */ 266 regmap_write(regmap, ISC_CC_RR_RG, (1 << 8)); 267 regmap_write(regmap, ISC_CC_RB_OR, 0); 268 regmap_write(regmap, ISC_CC_GR_GG, (1 << 8) << 16); 269 regmap_write(regmap, ISC_CC_GB_OG, 0); 270 regmap_write(regmap, ISC_CC_BR_BG, 0); 271 regmap_write(regmap, ISC_CC_BB_OB, (1 << 8)); 272 } 273 274 static void isc_sama7g5_config_ctrls(struct isc_device *isc, 275 const struct v4l2_ctrl_ops *ops) 276 { 277 struct isc_ctrls *ctrls = &isc->ctrls; 278 struct v4l2_ctrl_handler *hdl = &ctrls->handler; 279 280 ctrls->contrast = 16; 281 282 v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 16); 283 } 284 285 static void isc_sama7g5_config_dpc(struct isc_device *isc) 286 { 287 u32 bay_cfg = isc->config.sd_format->cfa_baycfg; 288 struct regmap *regmap = isc->regmap; 289 290 regmap_update_bits(regmap, ISC_DPC_CFG, ISC_DPC_CFG_BLOFF_MASK, 291 (64 << ISC_DPC_CFG_BLOFF_SHIFT)); 292 regmap_update_bits(regmap, ISC_DPC_CFG, ISC_DPC_CFG_BAYCFG_MASK, 293 (bay_cfg << ISC_DPC_CFG_BAYCFG_SHIFT)); 294 } 295 296 static void isc_sama7g5_config_gam(struct isc_device *isc) 297 { 298 struct regmap *regmap = isc->regmap; 299 300 regmap_update_bits(regmap, ISC_GAM_CTRL, ISC_GAM_CTRL_BIPART, 301 ISC_GAM_CTRL_BIPART); 302 } 303 304 static void isc_sama7g5_config_rlp(struct isc_device *isc) 305 { 306 struct regmap *regmap = isc->regmap; 307 u32 rlp_mode = isc->config.rlp_cfg_mode; 308 309 regmap_update_bits(regmap, ISC_RLP_CFG + isc->offsets.rlp, 310 ISC_RLP_CFG_MODE_MASK | ISC_RLP_CFG_LSH | 311 ISC_RLP_CFG_YMODE_MASK, rlp_mode); 312 } 313 314 static void isc_sama7g5_adapt_pipeline(struct isc_device *isc) 315 { 316 isc->try_config.bits_pipeline &= ISC_SAMA7G5_PIPELINE; 317 } 318 319 /* Gamma table with gamma 1/2.2 */ 320 static const u32 isc_sama7g5_gamma_table[][GAMMA_ENTRIES] = { 321 /* index 0 --> gamma bipartite */ 322 { 323 0x980, 0x4c0320, 0x650260, 0x7801e0, 0x8701a0, 0x940180, 324 0xa00160, 0xab0120, 0xb40120, 0xbd0120, 0xc60100, 0xce0100, 325 0xd600e0, 0xdd00e0, 0xe400e0, 0xeb00c0, 0xf100c0, 0xf700c0, 326 0xfd00c0, 0x10300a0, 0x10800c0, 0x10e00a0, 0x11300a0, 0x11800a0, 327 0x11d00a0, 0x12200a0, 0x12700a0, 0x12c0080, 0x13000a0, 0x1350080, 328 0x13900a0, 0x13e0080, 0x1420076, 0x17d0062, 0x1ae0054, 0x1d8004a, 329 0x1fd0044, 0x21f003e, 0x23e003a, 0x25b0036, 0x2760032, 0x28f0030, 330 0x2a7002e, 0x2be002c, 0x2d4002c, 0x2ea0028, 0x2fe0028, 0x3120026, 331 0x3250024, 0x3370024, 0x3490022, 0x35a0022, 0x36b0020, 0x37b0020, 332 0x38b0020, 0x39b001e, 0x3aa001e, 0x3b9001c, 0x3c7001c, 0x3d5001c, 333 0x3e3001c, 0x3f1001c, 0x3ff001a, 0x40c001a }, 334 }; 335 336 static int xisc_parse_dt(struct device *dev, struct isc_device *isc) 337 { 338 struct device_node *np = dev->of_node; 339 struct device_node *epn = NULL; 340 struct isc_subdev_entity *subdev_entity; 341 unsigned int flags; 342 int ret; 343 bool mipi_mode; 344 345 INIT_LIST_HEAD(&isc->subdev_entities); 346 347 mipi_mode = of_property_read_bool(np, "microchip,mipi-mode"); 348 349 while (1) { 350 struct v4l2_fwnode_endpoint v4l2_epn = { .bus_type = 0 }; 351 352 epn = of_graph_get_next_endpoint(np, epn); 353 if (!epn) 354 return 0; 355 356 ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(epn), 357 &v4l2_epn); 358 if (ret) { 359 ret = -EINVAL; 360 dev_err(dev, "Could not parse the endpoint\n"); 361 break; 362 } 363 364 subdev_entity = devm_kzalloc(dev, sizeof(*subdev_entity), 365 GFP_KERNEL); 366 if (!subdev_entity) { 367 ret = -ENOMEM; 368 break; 369 } 370 subdev_entity->epn = epn; 371 372 flags = v4l2_epn.bus.parallel.flags; 373 374 if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) 375 subdev_entity->pfe_cfg0 = ISC_PFE_CFG0_HPOL_LOW; 376 377 if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) 378 subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_LOW; 379 380 if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) 381 subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_LOW; 382 383 if (v4l2_epn.bus_type == V4L2_MBUS_BT656) 384 subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_CCIR_CRC | 385 ISC_PFE_CFG0_CCIR656; 386 387 if (mipi_mode) 388 subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_MIPI; 389 390 list_add_tail(&subdev_entity->list, &isc->subdev_entities); 391 } 392 of_node_put(epn); 393 394 return ret; 395 } 396 397 static int microchip_xisc_probe(struct platform_device *pdev) 398 { 399 struct device *dev = &pdev->dev; 400 struct isc_device *isc; 401 void __iomem *io_base; 402 struct isc_subdev_entity *subdev_entity; 403 int irq; 404 int ret; 405 u32 ver; 406 407 isc = devm_kzalloc(dev, sizeof(*isc), GFP_KERNEL); 408 if (!isc) 409 return -ENOMEM; 410 411 platform_set_drvdata(pdev, isc); 412 isc->dev = dev; 413 414 io_base = devm_platform_ioremap_resource(pdev, 0); 415 if (IS_ERR(io_base)) 416 return PTR_ERR(io_base); 417 418 isc->regmap = devm_regmap_init_mmio(dev, io_base, µchip_isc_regmap_config); 419 if (IS_ERR(isc->regmap)) { 420 ret = PTR_ERR(isc->regmap); 421 dev_err(dev, "failed to init register map: %d\n", ret); 422 return ret; 423 } 424 425 irq = platform_get_irq(pdev, 0); 426 if (irq < 0) 427 return irq; 428 429 ret = devm_request_irq(dev, irq, microchip_isc_interrupt, 0, 430 "microchip-sama7g5-xisc", isc); 431 if (ret < 0) { 432 dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n", 433 irq, ret); 434 return ret; 435 } 436 437 isc->gamma_table = isc_sama7g5_gamma_table; 438 isc->gamma_max = 0; 439 440 isc->max_width = ISC_SAMA7G5_MAX_SUPPORT_WIDTH; 441 isc->max_height = ISC_SAMA7G5_MAX_SUPPORT_HEIGHT; 442 443 isc->config_dpc = isc_sama7g5_config_dpc; 444 isc->config_csc = isc_sama7g5_config_csc; 445 isc->config_cbc = isc_sama7g5_config_cbc; 446 isc->config_cc = isc_sama7g5_config_cc; 447 isc->config_gam = isc_sama7g5_config_gam; 448 isc->config_rlp = isc_sama7g5_config_rlp; 449 isc->config_ctrls = isc_sama7g5_config_ctrls; 450 451 isc->adapt_pipeline = isc_sama7g5_adapt_pipeline; 452 453 isc->offsets.csc = ISC_SAMA7G5_CSC_OFFSET; 454 isc->offsets.cbc = ISC_SAMA7G5_CBC_OFFSET; 455 isc->offsets.sub422 = ISC_SAMA7G5_SUB422_OFFSET; 456 isc->offsets.sub420 = ISC_SAMA7G5_SUB420_OFFSET; 457 isc->offsets.rlp = ISC_SAMA7G5_RLP_OFFSET; 458 isc->offsets.his = ISC_SAMA7G5_HIS_OFFSET; 459 isc->offsets.dma = ISC_SAMA7G5_DMA_OFFSET; 460 isc->offsets.version = ISC_SAMA7G5_VERSION_OFFSET; 461 isc->offsets.his_entry = ISC_SAMA7G5_HIS_ENTRY_OFFSET; 462 463 isc->controller_formats = sama7g5_controller_formats; 464 isc->controller_formats_size = ARRAY_SIZE(sama7g5_controller_formats); 465 isc->formats_list = sama7g5_formats_list; 466 isc->formats_list_size = ARRAY_SIZE(sama7g5_formats_list); 467 468 /* sama7g5-isc RAM access port is full AXI4 - 32 bits per beat */ 469 isc->dcfg = ISC_DCFG_YMBSIZE_BEATS32 | ISC_DCFG_CMBSIZE_BEATS32; 470 471 /* sama7g5-isc : ISPCK does not exist, ISC is clocked by MCK */ 472 isc->ispck_required = false; 473 474 ret = microchip_isc_pipeline_init(isc); 475 if (ret) 476 return ret; 477 478 isc->hclock = devm_clk_get(dev, "hclock"); 479 if (IS_ERR(isc->hclock)) { 480 ret = PTR_ERR(isc->hclock); 481 dev_err(dev, "failed to get hclock: %d\n", ret); 482 return ret; 483 } 484 485 ret = clk_prepare_enable(isc->hclock); 486 if (ret) { 487 dev_err(dev, "failed to enable hclock: %d\n", ret); 488 return ret; 489 } 490 491 ret = microchip_isc_clk_init(isc); 492 if (ret) { 493 dev_err(dev, "failed to init isc clock: %d\n", ret); 494 goto unprepare_hclk; 495 } 496 497 ret = v4l2_device_register(dev, &isc->v4l2_dev); 498 if (ret) { 499 dev_err(dev, "unable to register v4l2 device.\n"); 500 goto unprepare_hclk; 501 } 502 503 ret = xisc_parse_dt(dev, isc); 504 if (ret) { 505 dev_err(dev, "fail to parse device tree\n"); 506 goto unregister_v4l2_device; 507 } 508 509 if (list_empty(&isc->subdev_entities)) { 510 dev_err(dev, "no subdev found\n"); 511 ret = -ENODEV; 512 goto unregister_v4l2_device; 513 } 514 515 list_for_each_entry(subdev_entity, &isc->subdev_entities, list) { 516 struct v4l2_async_connection *asd; 517 struct fwnode_handle *fwnode = 518 of_fwnode_handle(subdev_entity->epn); 519 520 v4l2_async_nf_init(&subdev_entity->notifier, &isc->v4l2_dev); 521 522 asd = v4l2_async_nf_add_fwnode_remote(&subdev_entity->notifier, 523 fwnode, 524 struct v4l2_async_connection); 525 526 of_node_put(subdev_entity->epn); 527 subdev_entity->epn = NULL; 528 529 if (IS_ERR(asd)) { 530 ret = PTR_ERR(asd); 531 goto cleanup_subdev; 532 } 533 534 subdev_entity->notifier.ops = µchip_isc_async_ops; 535 536 ret = v4l2_async_nf_register(&subdev_entity->notifier); 537 if (ret) { 538 dev_err(dev, "fail to register async notifier\n"); 539 goto cleanup_subdev; 540 } 541 542 if (video_is_registered(&isc->video_dev)) 543 break; 544 } 545 546 regmap_read(isc->regmap, ISC_VERSION + isc->offsets.version, &ver); 547 548 ret = isc_mc_init(isc, ver); 549 if (ret < 0) 550 goto isc_probe_mc_init_err; 551 552 pm_runtime_set_active(dev); 553 pm_runtime_enable(dev); 554 pm_request_idle(dev); 555 556 dev_info(dev, "Microchip XISC version %x\n", ver); 557 558 return 0; 559 560 isc_probe_mc_init_err: 561 isc_mc_cleanup(isc); 562 563 cleanup_subdev: 564 microchip_isc_subdev_cleanup(isc); 565 566 unregister_v4l2_device: 567 v4l2_device_unregister(&isc->v4l2_dev); 568 569 unprepare_hclk: 570 clk_disable_unprepare(isc->hclock); 571 572 microchip_isc_clk_cleanup(isc); 573 574 return ret; 575 } 576 577 static void microchip_xisc_remove(struct platform_device *pdev) 578 { 579 struct isc_device *isc = platform_get_drvdata(pdev); 580 581 pm_runtime_disable(&pdev->dev); 582 583 isc_mc_cleanup(isc); 584 585 microchip_isc_subdev_cleanup(isc); 586 587 v4l2_device_unregister(&isc->v4l2_dev); 588 589 clk_disable_unprepare(isc->hclock); 590 591 microchip_isc_clk_cleanup(isc); 592 } 593 594 static int __maybe_unused xisc_runtime_suspend(struct device *dev) 595 { 596 struct isc_device *isc = dev_get_drvdata(dev); 597 598 clk_disable_unprepare(isc->hclock); 599 600 return 0; 601 } 602 603 static int __maybe_unused xisc_runtime_resume(struct device *dev) 604 { 605 struct isc_device *isc = dev_get_drvdata(dev); 606 int ret; 607 608 ret = clk_prepare_enable(isc->hclock); 609 if (ret) 610 return ret; 611 612 return ret; 613 } 614 615 static const struct dev_pm_ops microchip_xisc_dev_pm_ops = { 616 SET_RUNTIME_PM_OPS(xisc_runtime_suspend, xisc_runtime_resume, NULL) 617 }; 618 619 #if IS_ENABLED(CONFIG_OF) 620 static const struct of_device_id microchip_xisc_of_match[] = { 621 { .compatible = "microchip,sama7g5-isc" }, 622 { } 623 }; 624 MODULE_DEVICE_TABLE(of, microchip_xisc_of_match); 625 #endif 626 627 static struct platform_driver microchip_xisc_driver = { 628 .probe = microchip_xisc_probe, 629 .remove_new = microchip_xisc_remove, 630 .driver = { 631 .name = "microchip-sama7g5-xisc", 632 .pm = µchip_xisc_dev_pm_ops, 633 .of_match_table = of_match_ptr(microchip_xisc_of_match), 634 }, 635 }; 636 637 module_platform_driver(microchip_xisc_driver); 638 639 MODULE_AUTHOR("Eugen Hristev <eugen.hristev@microchip.com>"); 640 MODULE_DESCRIPTION("The V4L2 driver for Microchip-XISC"); 641 MODULE_LICENSE("GPL v2"); 642