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 /* update ovl info for scanout, handles cases of multi-planar fb's, etc. 149 */ 150 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb, 151 struct omap_drm_window *win, struct omap_overlay_info *info) 152 { 153 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 154 const struct format *format = omap_fb->format; 155 struct plane *plane = &omap_fb->planes[0]; 156 uint32_t x, y, orient = 0; 157 158 info->color_mode = format->dss_format; 159 160 info->pos_x = win->crtc_x; 161 info->pos_y = win->crtc_y; 162 info->out_width = win->crtc_w; 163 info->out_height = win->crtc_h; 164 info->width = win->src_w; 165 info->height = win->src_h; 166 167 x = win->src_x; 168 y = win->src_y; 169 170 if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) { 171 uint32_t w = win->src_w; 172 uint32_t h = win->src_h; 173 174 switch (win->rotation & DRM_ROTATE_MASK) { 175 default: 176 dev_err(fb->dev->dev, "invalid rotation: %02x", 177 (uint32_t)win->rotation); 178 /* fallthru to default to no rotation */ 179 case 0: 180 case BIT(DRM_ROTATE_0): 181 orient = 0; 182 break; 183 case BIT(DRM_ROTATE_90): 184 orient = MASK_XY_FLIP | MASK_X_INVERT; 185 break; 186 case BIT(DRM_ROTATE_180): 187 orient = MASK_X_INVERT | MASK_Y_INVERT; 188 break; 189 case BIT(DRM_ROTATE_270): 190 orient = MASK_XY_FLIP | MASK_Y_INVERT; 191 break; 192 } 193 194 if (win->rotation & BIT(DRM_REFLECT_X)) 195 orient ^= MASK_X_INVERT; 196 197 if (win->rotation & BIT(DRM_REFLECT_Y)) 198 orient ^= MASK_Y_INVERT; 199 200 /* adjust x,y offset for flip/invert: */ 201 if (orient & MASK_XY_FLIP) 202 swap(w, h); 203 if (orient & MASK_Y_INVERT) 204 y += h - 1; 205 if (orient & MASK_X_INVERT) 206 x += w - 1; 207 208 omap_gem_rotated_paddr(plane->bo, orient, x, y, &info->paddr); 209 info->rotation_type = OMAP_DSS_ROT_TILER; 210 info->screen_width = omap_gem_tiled_stride(plane->bo, orient); 211 } else { 212 switch (win->rotation & DRM_ROTATE_MASK) { 213 case 0: 214 case BIT(DRM_ROTATE_0): 215 /* OK */ 216 break; 217 218 default: 219 dev_warn(fb->dev->dev, 220 "rotation '%d' ignored for non-tiled fb\n", 221 win->rotation); 222 win->rotation = 0; 223 break; 224 } 225 226 info->paddr = get_linear_addr(plane, format, 0, x, y); 227 info->rotation_type = OMAP_DSS_ROT_DMA; 228 info->screen_width = plane->pitch; 229 } 230 231 /* convert to pixels: */ 232 info->screen_width /= format->planes[0].stride_bpp; 233 234 if (format->dss_format == OMAP_DSS_COLOR_NV12) { 235 plane = &omap_fb->planes[1]; 236 237 if (info->rotation_type == OMAP_DSS_ROT_TILER) { 238 WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED)); 239 omap_gem_rotated_paddr(plane->bo, orient, 240 x/2, y/2, &info->p_uv_addr); 241 } else { 242 info->p_uv_addr = get_linear_addr(plane, format, 1, x, y); 243 } 244 } else { 245 info->p_uv_addr = 0; 246 } 247 } 248 249 /* pin, prepare for scanout: */ 250 int omap_framebuffer_pin(struct drm_framebuffer *fb) 251 { 252 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 253 int ret, i, n = drm_format_num_planes(fb->pixel_format); 254 255 mutex_lock(&omap_fb->lock); 256 257 if (omap_fb->pin_count > 0) { 258 omap_fb->pin_count++; 259 mutex_unlock(&omap_fb->lock); 260 return 0; 261 } 262 263 for (i = 0; i < n; i++) { 264 struct plane *plane = &omap_fb->planes[i]; 265 ret = omap_gem_get_paddr(plane->bo, &plane->paddr, true); 266 if (ret) 267 goto fail; 268 omap_gem_dma_sync(plane->bo, DMA_TO_DEVICE); 269 } 270 271 omap_fb->pin_count++; 272 273 mutex_unlock(&omap_fb->lock); 274 275 return 0; 276 277 fail: 278 for (i--; i >= 0; i--) { 279 struct plane *plane = &omap_fb->planes[i]; 280 omap_gem_put_paddr(plane->bo); 281 plane->paddr = 0; 282 } 283 284 mutex_unlock(&omap_fb->lock); 285 286 return ret; 287 } 288 289 /* unpin, no longer being scanned out: */ 290 void omap_framebuffer_unpin(struct drm_framebuffer *fb) 291 { 292 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 293 int i, n = drm_format_num_planes(fb->pixel_format); 294 295 mutex_lock(&omap_fb->lock); 296 297 omap_fb->pin_count--; 298 299 if (omap_fb->pin_count > 0) { 300 mutex_unlock(&omap_fb->lock); 301 return; 302 } 303 304 for (i = 0; i < n; i++) { 305 struct plane *plane = &omap_fb->planes[i]; 306 omap_gem_put_paddr(plane->bo); 307 plane->paddr = 0; 308 } 309 310 mutex_unlock(&omap_fb->lock); 311 } 312 313 struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p) 314 { 315 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 316 if (p >= drm_format_num_planes(fb->pixel_format)) 317 return NULL; 318 return omap_fb->planes[p].bo; 319 } 320 321 /* iterate thru all the connectors, returning ones that are attached 322 * to the same fb.. 323 */ 324 struct drm_connector *omap_framebuffer_get_next_connector( 325 struct drm_framebuffer *fb, struct drm_connector *from) 326 { 327 struct drm_device *dev = fb->dev; 328 struct list_head *connector_list = &dev->mode_config.connector_list; 329 struct drm_connector *connector = from; 330 331 if (!from) 332 return list_first_entry_or_null(connector_list, typeof(*from), 333 head); 334 335 list_for_each_entry_from(connector, connector_list, head) { 336 if (connector != from) { 337 struct drm_encoder *encoder = connector->encoder; 338 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; 339 if (crtc && crtc->primary->fb == fb) 340 return connector; 341 342 } 343 } 344 345 return NULL; 346 } 347 348 #ifdef CONFIG_DEBUG_FS 349 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 350 { 351 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 352 int i, n = drm_format_num_planes(fb->pixel_format); 353 354 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height, 355 (char *)&fb->pixel_format); 356 357 for (i = 0; i < n; i++) { 358 struct plane *plane = &omap_fb->planes[i]; 359 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 360 i, plane->offset, plane->pitch); 361 omap_gem_describe(plane->bo, m); 362 } 363 } 364 #endif 365 366 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev, 367 struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd) 368 { 369 struct drm_gem_object *bos[4]; 370 struct drm_framebuffer *fb; 371 int ret; 372 373 ret = objects_lookup(dev, file, mode_cmd->pixel_format, 374 bos, mode_cmd->handles); 375 if (ret) 376 return ERR_PTR(ret); 377 378 fb = omap_framebuffer_init(dev, mode_cmd, bos); 379 if (IS_ERR(fb)) { 380 int i, n = drm_format_num_planes(mode_cmd->pixel_format); 381 for (i = 0; i < n; i++) 382 drm_gem_object_unreference_unlocked(bos[i]); 383 return fb; 384 } 385 return fb; 386 } 387 388 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev, 389 struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 390 { 391 struct omap_framebuffer *omap_fb = NULL; 392 struct drm_framebuffer *fb = NULL; 393 const struct format *format = NULL; 394 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format); 395 396 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 397 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 398 (char *)&mode_cmd->pixel_format); 399 400 for (i = 0; i < ARRAY_SIZE(formats); i++) { 401 if (formats[i].pixel_format == mode_cmd->pixel_format) { 402 format = &formats[i]; 403 break; 404 } 405 } 406 407 if (!format) { 408 dev_err(dev->dev, "unsupported pixel format: %4.4s\n", 409 (char *)&mode_cmd->pixel_format); 410 ret = -EINVAL; 411 goto fail; 412 } 413 414 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL); 415 if (!omap_fb) { 416 ret = -ENOMEM; 417 goto fail; 418 } 419 420 fb = &omap_fb->base; 421 omap_fb->format = format; 422 mutex_init(&omap_fb->lock); 423 424 for (i = 0; i < n; i++) { 425 struct plane *plane = &omap_fb->planes[i]; 426 int size, pitch = mode_cmd->pitches[i]; 427 428 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) { 429 dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n", 430 pitch, mode_cmd->width * format->planes[i].stride_bpp); 431 ret = -EINVAL; 432 goto fail; 433 } 434 435 if (pitch % format->planes[i].stride_bpp != 0) { 436 dev_err(dev->dev, 437 "buffer pitch (%d bytes) is not a multiple of pixel size (%d bytes)\n", 438 pitch, format->planes[i].stride_bpp); 439 ret = -EINVAL; 440 goto fail; 441 } 442 443 size = pitch * mode_cmd->height / format->planes[i].sub_y; 444 445 if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) { 446 dev_err(dev->dev, "provided buffer object is too small! %d < %d\n", 447 bos[i]->size - mode_cmd->offsets[i], size); 448 ret = -EINVAL; 449 goto fail; 450 } 451 452 plane->bo = bos[i]; 453 plane->offset = mode_cmd->offsets[i]; 454 plane->pitch = pitch; 455 plane->paddr = 0; 456 } 457 458 drm_helper_mode_fill_fb_struct(fb, mode_cmd); 459 460 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs); 461 if (ret) { 462 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 463 goto fail; 464 } 465 466 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 467 468 return fb; 469 470 fail: 471 kfree(omap_fb); 472 473 return ERR_PTR(ret); 474 } 475