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