1 /* 2 * Copyright (C) STMicroelectronics SA 2014 3 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com> 4 * Fabien Dessenne <fabien.dessenne@st.com> 5 * for STMicroelectronics. 6 * License terms: GNU General Public License (GPL), version 2 7 */ 8 #include <linux/seq_file.h> 9 10 #include "sti_compositor.h" 11 #include "sti_mixer.h" 12 #include "sti_vtg.h" 13 14 /* Module parameter to set the background color of the mixer */ 15 static unsigned int bkg_color = 0x000000; 16 MODULE_PARM_DESC(bkgcolor, "Value of the background color 0xRRGGBB"); 17 module_param_named(bkgcolor, bkg_color, int, 0644); 18 19 /* Identity: G=Y , B=Cb , R=Cr */ 20 static const u32 mixerColorSpaceMatIdentity[] = { 21 0x10000000, 0x00000000, 0x10000000, 0x00001000, 22 0x00000000, 0x00000000, 0x00000000, 0x00000000 23 }; 24 25 /* regs offset */ 26 #define GAM_MIXER_CTL 0x00 27 #define GAM_MIXER_BKC 0x04 28 #define GAM_MIXER_BCO 0x0C 29 #define GAM_MIXER_BCS 0x10 30 #define GAM_MIXER_AVO 0x28 31 #define GAM_MIXER_AVS 0x2C 32 #define GAM_MIXER_CRB 0x34 33 #define GAM_MIXER_ACT 0x38 34 #define GAM_MIXER_MBP 0x3C 35 #define GAM_MIXER_MX0 0x80 36 37 /* id for depth of CRB reg */ 38 #define GAM_DEPTH_VID0_ID 1 39 #define GAM_DEPTH_VID1_ID 2 40 #define GAM_DEPTH_GDP0_ID 3 41 #define GAM_DEPTH_GDP1_ID 4 42 #define GAM_DEPTH_GDP2_ID 5 43 #define GAM_DEPTH_GDP3_ID 6 44 #define GAM_DEPTH_MASK_ID 7 45 46 /* mask in CTL reg */ 47 #define GAM_CTL_BACK_MASK BIT(0) 48 #define GAM_CTL_VID0_MASK BIT(1) 49 #define GAM_CTL_VID1_MASK BIT(2) 50 #define GAM_CTL_GDP0_MASK BIT(3) 51 #define GAM_CTL_GDP1_MASK BIT(4) 52 #define GAM_CTL_GDP2_MASK BIT(5) 53 #define GAM_CTL_GDP3_MASK BIT(6) 54 #define GAM_CTL_CURSOR_MASK BIT(9) 55 56 const char *sti_mixer_to_str(struct sti_mixer *mixer) 57 { 58 switch (mixer->id) { 59 case STI_MIXER_MAIN: 60 return "MAIN_MIXER"; 61 case STI_MIXER_AUX: 62 return "AUX_MIXER"; 63 default: 64 return "<UNKNOWN MIXER>"; 65 } 66 } 67 68 static inline u32 sti_mixer_reg_read(struct sti_mixer *mixer, u32 reg_id) 69 { 70 return readl(mixer->regs + reg_id); 71 } 72 73 static inline void sti_mixer_reg_write(struct sti_mixer *mixer, 74 u32 reg_id, u32 val) 75 { 76 writel(val, mixer->regs + reg_id); 77 } 78 79 #define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \ 80 sti_mixer_reg_read(mixer, reg)) 81 82 static void mixer_dbg_ctl(struct seq_file *s, int val) 83 { 84 unsigned int i; 85 int count = 0; 86 char *const disp_layer[] = {"BKG", "VID0", "VID1", "GDP0", 87 "GDP1", "GDP2", "GDP3"}; 88 89 seq_puts(s, "\tEnabled: "); 90 for (i = 0; i < 7; i++) { 91 if (val & 1) { 92 seq_printf(s, "%s ", disp_layer[i]); 93 count++; 94 } 95 val = val >> 1; 96 } 97 98 val = val >> 2; 99 if (val & 1) { 100 seq_puts(s, "CURS "); 101 count++; 102 } 103 if (!count) 104 seq_puts(s, "Nothing"); 105 } 106 107 static void mixer_dbg_crb(struct seq_file *s, int val) 108 { 109 int i; 110 111 seq_puts(s, "\tDepth: "); 112 for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) { 113 switch (val & GAM_DEPTH_MASK_ID) { 114 case GAM_DEPTH_VID0_ID: 115 seq_puts(s, "VID0"); 116 break; 117 case GAM_DEPTH_VID1_ID: 118 seq_puts(s, "VID1"); 119 break; 120 case GAM_DEPTH_GDP0_ID: 121 seq_puts(s, "GDP0"); 122 break; 123 case GAM_DEPTH_GDP1_ID: 124 seq_puts(s, "GDP1"); 125 break; 126 case GAM_DEPTH_GDP2_ID: 127 seq_puts(s, "GDP2"); 128 break; 129 case GAM_DEPTH_GDP3_ID: 130 seq_puts(s, "GDP3"); 131 break; 132 default: 133 seq_puts(s, "---"); 134 } 135 136 if (i < GAM_MIXER_NB_DEPTH_LEVEL - 1) 137 seq_puts(s, " < "); 138 val = val >> 3; 139 } 140 } 141 142 static void mixer_dbg_mxn(struct seq_file *s, void *addr) 143 { 144 int i; 145 146 for (i = 1; i < 8; i++) 147 seq_printf(s, "-0x%08X", (int)readl(addr + i * 4)); 148 } 149 150 static int mixer_dbg_show(struct seq_file *s, void *arg) 151 { 152 struct drm_info_node *node = s->private; 153 struct sti_mixer *mixer = (struct sti_mixer *)node->info_ent->data; 154 155 seq_printf(s, "%s: (vaddr = 0x%p)", 156 sti_mixer_to_str(mixer), mixer->regs); 157 158 DBGFS_DUMP(GAM_MIXER_CTL); 159 mixer_dbg_ctl(s, sti_mixer_reg_read(mixer, GAM_MIXER_CTL)); 160 DBGFS_DUMP(GAM_MIXER_BKC); 161 DBGFS_DUMP(GAM_MIXER_BCO); 162 DBGFS_DUMP(GAM_MIXER_BCS); 163 DBGFS_DUMP(GAM_MIXER_AVO); 164 DBGFS_DUMP(GAM_MIXER_AVS); 165 DBGFS_DUMP(GAM_MIXER_CRB); 166 mixer_dbg_crb(s, sti_mixer_reg_read(mixer, GAM_MIXER_CRB)); 167 DBGFS_DUMP(GAM_MIXER_ACT); 168 DBGFS_DUMP(GAM_MIXER_MBP); 169 DBGFS_DUMP(GAM_MIXER_MX0); 170 mixer_dbg_mxn(s, mixer->regs + GAM_MIXER_MX0); 171 seq_puts(s, "\n"); 172 173 return 0; 174 } 175 176 static struct drm_info_list mixer0_debugfs_files[] = { 177 { "mixer_main", mixer_dbg_show, 0, NULL }, 178 }; 179 180 static struct drm_info_list mixer1_debugfs_files[] = { 181 { "mixer_aux", mixer_dbg_show, 0, NULL }, 182 }; 183 184 int sti_mixer_debugfs_init(struct sti_mixer *mixer, struct drm_minor *minor) 185 { 186 unsigned int i; 187 struct drm_info_list *mixer_debugfs_files; 188 int nb_files; 189 190 switch (mixer->id) { 191 case STI_MIXER_MAIN: 192 mixer_debugfs_files = mixer0_debugfs_files; 193 nb_files = ARRAY_SIZE(mixer0_debugfs_files); 194 break; 195 case STI_MIXER_AUX: 196 mixer_debugfs_files = mixer1_debugfs_files; 197 nb_files = ARRAY_SIZE(mixer1_debugfs_files); 198 break; 199 default: 200 return -EINVAL; 201 } 202 203 for (i = 0; i < nb_files; i++) 204 mixer_debugfs_files[i].data = mixer; 205 206 return drm_debugfs_create_files(mixer_debugfs_files, 207 nb_files, 208 minor->debugfs_root, minor); 209 } 210 211 void sti_mixer_set_background_status(struct sti_mixer *mixer, bool enable) 212 { 213 u32 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL); 214 215 val &= ~GAM_CTL_BACK_MASK; 216 val |= enable; 217 sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val); 218 } 219 220 static void sti_mixer_set_background_color(struct sti_mixer *mixer, 221 unsigned int rgb) 222 { 223 sti_mixer_reg_write(mixer, GAM_MIXER_BKC, rgb); 224 } 225 226 static void sti_mixer_set_background_area(struct sti_mixer *mixer, 227 struct drm_display_mode *mode) 228 { 229 u32 ydo, xdo, yds, xds; 230 231 ydo = sti_vtg_get_line_number(*mode, 0); 232 yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1); 233 xdo = sti_vtg_get_pixel_number(*mode, 0); 234 xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1); 235 236 sti_mixer_reg_write(mixer, GAM_MIXER_BCO, ydo << 16 | xdo); 237 sti_mixer_reg_write(mixer, GAM_MIXER_BCS, yds << 16 | xds); 238 } 239 240 int sti_mixer_set_plane_depth(struct sti_mixer *mixer, struct sti_plane *plane) 241 { 242 int plane_id, depth = plane->drm_plane.state->normalized_zpos; 243 unsigned int i; 244 u32 mask, val; 245 246 switch (plane->desc) { 247 case STI_GDP_0: 248 plane_id = GAM_DEPTH_GDP0_ID; 249 break; 250 case STI_GDP_1: 251 plane_id = GAM_DEPTH_GDP1_ID; 252 break; 253 case STI_GDP_2: 254 plane_id = GAM_DEPTH_GDP2_ID; 255 break; 256 case STI_GDP_3: 257 plane_id = GAM_DEPTH_GDP3_ID; 258 break; 259 case STI_HQVDP_0: 260 plane_id = GAM_DEPTH_VID0_ID; 261 break; 262 case STI_CURSOR: 263 /* no need to set depth for cursor */ 264 return 0; 265 default: 266 DRM_ERROR("Unknown plane %d\n", plane->desc); 267 return 1; 268 } 269 270 /* Search if a previous depth was already assigned to the plane */ 271 val = sti_mixer_reg_read(mixer, GAM_MIXER_CRB); 272 for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) { 273 mask = GAM_DEPTH_MASK_ID << (3 * i); 274 if ((val & mask) == plane_id << (3 * i)) 275 break; 276 } 277 278 mask |= GAM_DEPTH_MASK_ID << (3 * depth); 279 plane_id = plane_id << (3 * depth); 280 281 DRM_DEBUG_DRIVER("%s %s depth=%d\n", sti_mixer_to_str(mixer), 282 sti_plane_to_str(plane), depth); 283 dev_dbg(mixer->dev, "GAM_MIXER_CRB val 0x%x mask 0x%x\n", 284 plane_id, mask); 285 286 val &= ~mask; 287 val |= plane_id; 288 sti_mixer_reg_write(mixer, GAM_MIXER_CRB, val); 289 290 dev_dbg(mixer->dev, "Read GAM_MIXER_CRB 0x%x\n", 291 sti_mixer_reg_read(mixer, GAM_MIXER_CRB)); 292 return 0; 293 } 294 295 int sti_mixer_active_video_area(struct sti_mixer *mixer, 296 struct drm_display_mode *mode) 297 { 298 u32 ydo, xdo, yds, xds; 299 300 ydo = sti_vtg_get_line_number(*mode, 0); 301 yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1); 302 xdo = sti_vtg_get_pixel_number(*mode, 0); 303 xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1); 304 305 DRM_DEBUG_DRIVER("%s active video area xdo:%d ydo:%d xds:%d yds:%d\n", 306 sti_mixer_to_str(mixer), xdo, ydo, xds, yds); 307 sti_mixer_reg_write(mixer, GAM_MIXER_AVO, ydo << 16 | xdo); 308 sti_mixer_reg_write(mixer, GAM_MIXER_AVS, yds << 16 | xds); 309 310 sti_mixer_set_background_color(mixer, bkg_color); 311 312 sti_mixer_set_background_area(mixer, mode); 313 sti_mixer_set_background_status(mixer, true); 314 return 0; 315 } 316 317 static u32 sti_mixer_get_plane_mask(struct sti_plane *plane) 318 { 319 switch (plane->desc) { 320 case STI_BACK: 321 return GAM_CTL_BACK_MASK; 322 case STI_GDP_0: 323 return GAM_CTL_GDP0_MASK; 324 case STI_GDP_1: 325 return GAM_CTL_GDP1_MASK; 326 case STI_GDP_2: 327 return GAM_CTL_GDP2_MASK; 328 case STI_GDP_3: 329 return GAM_CTL_GDP3_MASK; 330 case STI_HQVDP_0: 331 return GAM_CTL_VID0_MASK; 332 case STI_CURSOR: 333 return GAM_CTL_CURSOR_MASK; 334 default: 335 return 0; 336 } 337 } 338 339 int sti_mixer_set_plane_status(struct sti_mixer *mixer, 340 struct sti_plane *plane, bool status) 341 { 342 u32 mask, val; 343 344 DRM_DEBUG_DRIVER("%s %s %s\n", status ? "enable" : "disable", 345 sti_mixer_to_str(mixer), sti_plane_to_str(plane)); 346 347 mask = sti_mixer_get_plane_mask(plane); 348 if (!mask) { 349 DRM_ERROR("Can't find layer mask\n"); 350 return -EINVAL; 351 } 352 353 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL); 354 val &= ~mask; 355 val |= status ? mask : 0; 356 sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val); 357 358 return 0; 359 } 360 361 void sti_mixer_set_matrix(struct sti_mixer *mixer) 362 { 363 unsigned int i; 364 365 for (i = 0; i < ARRAY_SIZE(mixerColorSpaceMatIdentity); i++) 366 sti_mixer_reg_write(mixer, GAM_MIXER_MX0 + (i * 4), 367 mixerColorSpaceMatIdentity[i]); 368 } 369 370 struct sti_mixer *sti_mixer_create(struct device *dev, 371 struct drm_device *drm_dev, 372 int id, 373 void __iomem *baseaddr) 374 { 375 struct sti_mixer *mixer = devm_kzalloc(dev, sizeof(*mixer), GFP_KERNEL); 376 struct device_node *np = dev->of_node; 377 378 dev_dbg(dev, "%s\n", __func__); 379 if (!mixer) { 380 DRM_ERROR("Failed to allocated memory for mixer\n"); 381 return NULL; 382 } 383 mixer->regs = baseaddr; 384 mixer->dev = dev; 385 mixer->id = id; 386 387 if (of_device_is_compatible(np, "st,stih416-compositor")) 388 sti_mixer_set_matrix(mixer); 389 390 DRM_DEBUG_DRIVER("%s created. Regs=%p\n", 391 sti_mixer_to_str(mixer), mixer->regs); 392 393 return mixer; 394 } 395