1 /* 2 * drivers/gpu/drm/omapdrm/omap_fb.c 3 * 4 * Copyright (C) 2011 Texas Instruments 5 * Author: Rob Clark <rob@ti.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 #include <drm/drm_crtc.h> 21 #include <drm/drm_crtc_helper.h> 22 23 #include "omap_dmm_tiler.h" 24 #include "omap_drv.h" 25 26 /* 27 * framebuffer funcs 28 */ 29 30 /* per-format info: */ 31 struct format { 32 enum omap_color_mode dss_format; 33 uint32_t pixel_format; 34 struct { 35 int stride_bpp; /* this times width is stride */ 36 int sub_y; /* sub-sample in y dimension */ 37 } planes[4]; 38 bool yuv; 39 }; 40 41 static const struct format formats[] = { 42 /* 16bpp [A]RGB: */ 43 { OMAP_DSS_COLOR_RGB16, DRM_FORMAT_RGB565, {{2, 1}}, false }, /* RGB16-565 */ 44 { OMAP_DSS_COLOR_RGB12U, DRM_FORMAT_RGBX4444, {{2, 1}}, false }, /* RGB12x-4444 */ 45 { OMAP_DSS_COLOR_RGBX16, DRM_FORMAT_XRGB4444, {{2, 1}}, false }, /* xRGB12-4444 */ 46 { OMAP_DSS_COLOR_RGBA16, DRM_FORMAT_RGBA4444, {{2, 1}}, false }, /* RGBA12-4444 */ 47 { OMAP_DSS_COLOR_ARGB16, DRM_FORMAT_ARGB4444, {{2, 1}}, false }, /* ARGB16-4444 */ 48 { OMAP_DSS_COLOR_XRGB16_1555, DRM_FORMAT_XRGB1555, {{2, 1}}, false }, /* xRGB15-1555 */ 49 { OMAP_DSS_COLOR_ARGB16_1555, DRM_FORMAT_ARGB1555, {{2, 1}}, false }, /* ARGB16-1555 */ 50 /* 24bpp RGB: */ 51 { OMAP_DSS_COLOR_RGB24P, DRM_FORMAT_RGB888, {{3, 1}}, false }, /* RGB24-888 */ 52 /* 32bpp [A]RGB: */ 53 { OMAP_DSS_COLOR_RGBX32, DRM_FORMAT_RGBX8888, {{4, 1}}, false }, /* RGBx24-8888 */ 54 { OMAP_DSS_COLOR_RGB24U, DRM_FORMAT_XRGB8888, {{4, 1}}, false }, /* xRGB24-8888 */ 55 { OMAP_DSS_COLOR_RGBA32, DRM_FORMAT_RGBA8888, {{4, 1}}, false }, /* RGBA32-8888 */ 56 { OMAP_DSS_COLOR_ARGB32, DRM_FORMAT_ARGB8888, {{4, 1}}, false }, /* ARGB32-8888 */ 57 /* YUV: */ 58 { OMAP_DSS_COLOR_NV12, DRM_FORMAT_NV12, {{1, 1}, {1, 2}}, true }, 59 { OMAP_DSS_COLOR_YUV2, DRM_FORMAT_YUYV, {{2, 1}}, true }, 60 { OMAP_DSS_COLOR_UYVY, DRM_FORMAT_UYVY, {{2, 1}}, true }, 61 }; 62 63 /* convert from overlay's pixel formats bitmask to an array of fourcc's */ 64 uint32_t omap_framebuffer_get_formats(uint32_t *pixel_formats, 65 uint32_t max_formats, enum omap_color_mode supported_modes) 66 { 67 uint32_t nformats = 0; 68 int i = 0; 69 70 for (i = 0; i < ARRAY_SIZE(formats) && nformats < max_formats; i++) 71 if (formats[i].dss_format & supported_modes) 72 pixel_formats[nformats++] = formats[i].pixel_format; 73 74 return nformats; 75 } 76 77 /* per-plane info for the fb: */ 78 struct plane { 79 struct drm_gem_object *bo; 80 uint32_t pitch; 81 uint32_t offset; 82 dma_addr_t paddr; 83 }; 84 85 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base) 86 87 struct omap_framebuffer { 88 struct drm_framebuffer base; 89 int pin_count; 90 const struct format *format; 91 struct plane planes[4]; 92 /* lock for pinning (pin_count and planes.paddr) */ 93 struct mutex lock; 94 }; 95 96 static int omap_framebuffer_create_handle(struct drm_framebuffer *fb, 97 struct drm_file *file_priv, 98 unsigned int *handle) 99 { 100 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 101 return drm_gem_handle_create(file_priv, 102 omap_fb->planes[0].bo, handle); 103 } 104 105 static void omap_framebuffer_destroy(struct drm_framebuffer *fb) 106 { 107 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 108 int i, n = drm_format_num_planes(fb->pixel_format); 109 110 DBG("destroy: FB ID: %d (%p)", fb->base.id, fb); 111 112 drm_framebuffer_cleanup(fb); 113 114 for (i = 0; i < n; i++) { 115 struct plane *plane = &omap_fb->planes[i]; 116 if (plane->bo) 117 drm_gem_object_unreference_unlocked(plane->bo); 118 } 119 120 kfree(omap_fb); 121 } 122 123 static int omap_framebuffer_dirty(struct drm_framebuffer *fb, 124 struct drm_file *file_priv, unsigned flags, unsigned color, 125 struct drm_clip_rect *clips, unsigned num_clips) 126 { 127 return 0; 128 } 129 130 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = { 131 .create_handle = omap_framebuffer_create_handle, 132 .destroy = omap_framebuffer_destroy, 133 .dirty = omap_framebuffer_dirty, 134 }; 135 136 static uint32_t get_linear_addr(struct plane *plane, 137 const struct format *format, int n, int x, int y) 138 { 139 uint32_t offset; 140 141 offset = plane->offset + 142 (x * format->planes[n].stride_bpp) + 143 (y * plane->pitch / format->planes[n].sub_y); 144 145 return plane->paddr + offset; 146 } 147 148 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb) 149 { 150 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 151 struct plane *plane = &omap_fb->planes[0]; 152 153 return omap_gem_flags(plane->bo) & OMAP_BO_TILED; 154 } 155 156 /* update ovl info for scanout, handles cases of multi-planar fb's, etc. 157 */ 158 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb, 159 struct omap_drm_window *win, struct omap_overlay_info *info) 160 { 161 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 162 const struct format *format = omap_fb->format; 163 struct plane *plane = &omap_fb->planes[0]; 164 uint32_t x, y, orient = 0; 165 166 info->color_mode = format->dss_format; 167 168 info->pos_x = win->crtc_x; 169 info->pos_y = win->crtc_y; 170 info->out_width = win->crtc_w; 171 info->out_height = win->crtc_h; 172 info->width = win->src_w; 173 info->height = win->src_h; 174 175 x = win->src_x; 176 y = win->src_y; 177 178 if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) { 179 uint32_t w = win->src_w; 180 uint32_t h = win->src_h; 181 182 switch (win->rotation & DRM_ROTATE_MASK) { 183 default: 184 dev_err(fb->dev->dev, "invalid rotation: %02x", 185 (uint32_t)win->rotation); 186 /* fallthru to default to no rotation */ 187 case 0: 188 case BIT(DRM_ROTATE_0): 189 orient = 0; 190 break; 191 case BIT(DRM_ROTATE_90): 192 orient = MASK_XY_FLIP | MASK_X_INVERT; 193 break; 194 case BIT(DRM_ROTATE_180): 195 orient = MASK_X_INVERT | MASK_Y_INVERT; 196 break; 197 case BIT(DRM_ROTATE_270): 198 orient = MASK_XY_FLIP | MASK_Y_INVERT; 199 break; 200 } 201 202 if (win->rotation & BIT(DRM_REFLECT_X)) 203 orient ^= MASK_X_INVERT; 204 205 if (win->rotation & BIT(DRM_REFLECT_Y)) 206 orient ^= MASK_Y_INVERT; 207 208 /* adjust x,y offset for flip/invert: */ 209 if (orient & MASK_XY_FLIP) 210 swap(w, h); 211 if (orient & MASK_Y_INVERT) 212 y += h - 1; 213 if (orient & MASK_X_INVERT) 214 x += w - 1; 215 216 omap_gem_rotated_paddr(plane->bo, orient, x, y, &info->paddr); 217 info->rotation_type = OMAP_DSS_ROT_TILER; 218 info->screen_width = omap_gem_tiled_stride(plane->bo, orient); 219 } else { 220 switch (win->rotation & DRM_ROTATE_MASK) { 221 case 0: 222 case BIT(DRM_ROTATE_0): 223 /* OK */ 224 break; 225 226 default: 227 dev_warn(fb->dev->dev, 228 "rotation '%d' ignored for non-tiled fb\n", 229 win->rotation); 230 win->rotation = 0; 231 break; 232 } 233 234 info->paddr = get_linear_addr(plane, format, 0, x, y); 235 info->rotation_type = OMAP_DSS_ROT_DMA; 236 info->screen_width = plane->pitch; 237 } 238 239 /* convert to pixels: */ 240 info->screen_width /= format->planes[0].stride_bpp; 241 242 if (format->dss_format == OMAP_DSS_COLOR_NV12) { 243 plane = &omap_fb->planes[1]; 244 245 if (info->rotation_type == OMAP_DSS_ROT_TILER) { 246 WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED)); 247 omap_gem_rotated_paddr(plane->bo, orient, 248 x/2, y/2, &info->p_uv_addr); 249 } else { 250 info->p_uv_addr = get_linear_addr(plane, format, 1, x, y); 251 } 252 } else { 253 info->p_uv_addr = 0; 254 } 255 } 256 257 /* pin, prepare for scanout: */ 258 int omap_framebuffer_pin(struct drm_framebuffer *fb) 259 { 260 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 261 int ret, i, n = drm_format_num_planes(fb->pixel_format); 262 263 mutex_lock(&omap_fb->lock); 264 265 if (omap_fb->pin_count > 0) { 266 omap_fb->pin_count++; 267 mutex_unlock(&omap_fb->lock); 268 return 0; 269 } 270 271 for (i = 0; i < n; i++) { 272 struct plane *plane = &omap_fb->planes[i]; 273 ret = omap_gem_get_paddr(plane->bo, &plane->paddr, true); 274 if (ret) 275 goto fail; 276 omap_gem_dma_sync(plane->bo, DMA_TO_DEVICE); 277 } 278 279 omap_fb->pin_count++; 280 281 mutex_unlock(&omap_fb->lock); 282 283 return 0; 284 285 fail: 286 for (i--; i >= 0; i--) { 287 struct plane *plane = &omap_fb->planes[i]; 288 omap_gem_put_paddr(plane->bo); 289 plane->paddr = 0; 290 } 291 292 mutex_unlock(&omap_fb->lock); 293 294 return ret; 295 } 296 297 /* unpin, no longer being scanned out: */ 298 void omap_framebuffer_unpin(struct drm_framebuffer *fb) 299 { 300 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 301 int i, n = drm_format_num_planes(fb->pixel_format); 302 303 mutex_lock(&omap_fb->lock); 304 305 omap_fb->pin_count--; 306 307 if (omap_fb->pin_count > 0) { 308 mutex_unlock(&omap_fb->lock); 309 return; 310 } 311 312 for (i = 0; i < n; i++) { 313 struct plane *plane = &omap_fb->planes[i]; 314 omap_gem_put_paddr(plane->bo); 315 plane->paddr = 0; 316 } 317 318 mutex_unlock(&omap_fb->lock); 319 } 320 321 struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p) 322 { 323 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 324 if (p >= drm_format_num_planes(fb->pixel_format)) 325 return NULL; 326 return omap_fb->planes[p].bo; 327 } 328 329 /* iterate thru all the connectors, returning ones that are attached 330 * to the same fb.. 331 */ 332 struct drm_connector *omap_framebuffer_get_next_connector( 333 struct drm_framebuffer *fb, struct drm_connector *from) 334 { 335 struct drm_device *dev = fb->dev; 336 struct list_head *connector_list = &dev->mode_config.connector_list; 337 struct drm_connector *connector = from; 338 339 if (!from) 340 return list_first_entry_or_null(connector_list, typeof(*from), 341 head); 342 343 list_for_each_entry_from(connector, connector_list, head) { 344 if (connector != from) { 345 struct drm_encoder *encoder = connector->encoder; 346 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; 347 if (crtc && crtc->primary->fb == fb) 348 return connector; 349 350 } 351 } 352 353 return NULL; 354 } 355 356 #ifdef CONFIG_DEBUG_FS 357 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 358 { 359 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 360 int i, n = drm_format_num_planes(fb->pixel_format); 361 362 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height, 363 (char *)&fb->pixel_format); 364 365 for (i = 0; i < n; i++) { 366 struct plane *plane = &omap_fb->planes[i]; 367 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 368 i, plane->offset, plane->pitch); 369 omap_gem_describe(plane->bo, m); 370 } 371 } 372 #endif 373 374 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev, 375 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 376 { 377 struct drm_gem_object *bos[4]; 378 struct drm_framebuffer *fb; 379 int ret; 380 381 ret = objects_lookup(dev, file, mode_cmd->pixel_format, 382 bos, mode_cmd->handles); 383 if (ret) 384 return ERR_PTR(ret); 385 386 fb = omap_framebuffer_init(dev, mode_cmd, bos); 387 if (IS_ERR(fb)) { 388 int i, n = drm_format_num_planes(mode_cmd->pixel_format); 389 for (i = 0; i < n; i++) 390 drm_gem_object_unreference_unlocked(bos[i]); 391 return fb; 392 } 393 return fb; 394 } 395 396 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev, 397 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 398 { 399 struct omap_framebuffer *omap_fb = NULL; 400 struct drm_framebuffer *fb = NULL; 401 const struct format *format = NULL; 402 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format); 403 404 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 405 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 406 (char *)&mode_cmd->pixel_format); 407 408 for (i = 0; i < ARRAY_SIZE(formats); i++) { 409 if (formats[i].pixel_format == mode_cmd->pixel_format) { 410 format = &formats[i]; 411 break; 412 } 413 } 414 415 if (!format) { 416 dev_err(dev->dev, "unsupported pixel format: %4.4s\n", 417 (char *)&mode_cmd->pixel_format); 418 ret = -EINVAL; 419 goto fail; 420 } 421 422 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL); 423 if (!omap_fb) { 424 ret = -ENOMEM; 425 goto fail; 426 } 427 428 fb = &omap_fb->base; 429 omap_fb->format = format; 430 mutex_init(&omap_fb->lock); 431 432 for (i = 0; i < n; i++) { 433 struct plane *plane = &omap_fb->planes[i]; 434 int size, pitch = mode_cmd->pitches[i]; 435 436 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) { 437 dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n", 438 pitch, mode_cmd->width * format->planes[i].stride_bpp); 439 ret = -EINVAL; 440 goto fail; 441 } 442 443 if (pitch % format->planes[i].stride_bpp != 0) { 444 dev_err(dev->dev, 445 "buffer pitch (%d bytes) is not a multiple of pixel size (%d bytes)\n", 446 pitch, format->planes[i].stride_bpp); 447 ret = -EINVAL; 448 goto fail; 449 } 450 451 size = pitch * mode_cmd->height / format->planes[i].sub_y; 452 453 if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) { 454 dev_err(dev->dev, "provided buffer object is too small! %d < %d\n", 455 bos[i]->size - mode_cmd->offsets[i], size); 456 ret = -EINVAL; 457 goto fail; 458 } 459 460 if (i > 0 && pitch != mode_cmd->pitches[i - 1]) { 461 dev_err(dev->dev, 462 "pitches are not the same between framebuffer planes %d != %d\n", 463 pitch, mode_cmd->pitches[i - 1]); 464 ret = -EINVAL; 465 goto fail; 466 } 467 468 plane->bo = bos[i]; 469 plane->offset = mode_cmd->offsets[i]; 470 plane->pitch = pitch; 471 plane->paddr = 0; 472 } 473 474 drm_helper_mode_fill_fb_struct(fb, mode_cmd); 475 476 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs); 477 if (ret) { 478 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 479 goto fail; 480 } 481 482 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 483 484 return fb; 485 486 fail: 487 kfree(omap_fb); 488 489 return ERR_PTR(ret); 490 } 491