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 static const u32 formats[] = { 33 /* 16bpp [A]RGB: */ 34 DRM_FORMAT_RGB565, /* RGB16-565 */ 35 DRM_FORMAT_RGBX4444, /* RGB12x-4444 */ 36 DRM_FORMAT_XRGB4444, /* xRGB12-4444 */ 37 DRM_FORMAT_RGBA4444, /* RGBA12-4444 */ 38 DRM_FORMAT_ARGB4444, /* ARGB16-4444 */ 39 DRM_FORMAT_XRGB1555, /* xRGB15-1555 */ 40 DRM_FORMAT_ARGB1555, /* ARGB16-1555 */ 41 /* 24bpp RGB: */ 42 DRM_FORMAT_RGB888, /* RGB24-888 */ 43 /* 32bpp [A]RGB: */ 44 DRM_FORMAT_RGBX8888, /* RGBx24-8888 */ 45 DRM_FORMAT_XRGB8888, /* xRGB24-8888 */ 46 DRM_FORMAT_RGBA8888, /* RGBA32-8888 */ 47 DRM_FORMAT_ARGB8888, /* ARGB32-8888 */ 48 /* YUV: */ 49 DRM_FORMAT_NV12, 50 DRM_FORMAT_YUYV, 51 DRM_FORMAT_UYVY, 52 }; 53 54 /* per-plane info for the fb: */ 55 struct plane { 56 struct drm_gem_object *bo; 57 uint32_t pitch; 58 uint32_t offset; 59 dma_addr_t dma_addr; 60 }; 61 62 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base) 63 64 struct omap_framebuffer { 65 struct drm_framebuffer base; 66 int pin_count; 67 const struct drm_format_info *format; 68 struct plane planes[2]; 69 /* lock for pinning (pin_count and planes.dma_addr) */ 70 struct mutex lock; 71 }; 72 73 static int omap_framebuffer_create_handle(struct drm_framebuffer *fb, 74 struct drm_file *file_priv, 75 unsigned int *handle) 76 { 77 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 78 return drm_gem_handle_create(file_priv, 79 omap_fb->planes[0].bo, handle); 80 } 81 82 static void omap_framebuffer_destroy(struct drm_framebuffer *fb) 83 { 84 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 85 int i, n = fb->format->num_planes; 86 87 DBG("destroy: FB ID: %d (%p)", fb->base.id, fb); 88 89 drm_framebuffer_cleanup(fb); 90 91 for (i = 0; i < n; i++) { 92 struct plane *plane = &omap_fb->planes[i]; 93 94 drm_gem_object_unreference_unlocked(plane->bo); 95 } 96 97 kfree(omap_fb); 98 } 99 100 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = { 101 .create_handle = omap_framebuffer_create_handle, 102 .destroy = omap_framebuffer_destroy, 103 }; 104 105 static uint32_t get_linear_addr(struct plane *plane, 106 const struct drm_format_info *format, int n, int x, int y) 107 { 108 uint32_t offset; 109 110 offset = plane->offset 111 + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub)) 112 + (y * plane->pitch / (n == 0 ? 1 : format->vsub)); 113 114 return plane->dma_addr + offset; 115 } 116 117 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb) 118 { 119 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 120 struct plane *plane = &omap_fb->planes[0]; 121 122 return omap_gem_flags(plane->bo) & OMAP_BO_TILED; 123 } 124 125 /* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */ 126 static uint32_t drm_rotation_to_tiler(unsigned int drm_rot) 127 { 128 uint32_t orient; 129 130 switch (drm_rot & DRM_MODE_ROTATE_MASK) { 131 default: 132 case DRM_MODE_ROTATE_0: 133 orient = 0; 134 break; 135 case DRM_MODE_ROTATE_90: 136 orient = MASK_XY_FLIP | MASK_X_INVERT; 137 break; 138 case DRM_MODE_ROTATE_180: 139 orient = MASK_X_INVERT | MASK_Y_INVERT; 140 break; 141 case DRM_MODE_ROTATE_270: 142 orient = MASK_XY_FLIP | MASK_Y_INVERT; 143 break; 144 } 145 146 if (drm_rot & DRM_MODE_REFLECT_X) 147 orient ^= MASK_X_INVERT; 148 149 if (drm_rot & DRM_MODE_REFLECT_Y) 150 orient ^= MASK_Y_INVERT; 151 152 return orient; 153 } 154 155 /* update ovl info for scanout, handles cases of multi-planar fb's, etc. 156 */ 157 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb, 158 struct drm_plane_state *state, struct omap_overlay_info *info) 159 { 160 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 161 const struct drm_format_info *format = omap_fb->format; 162 struct plane *plane = &omap_fb->planes[0]; 163 uint32_t x, y, orient = 0; 164 165 info->fourcc = fb->format->format; 166 167 info->pos_x = state->crtc_x; 168 info->pos_y = state->crtc_y; 169 info->out_width = state->crtc_w; 170 info->out_height = state->crtc_h; 171 info->width = state->src_w >> 16; 172 info->height = state->src_h >> 16; 173 174 /* DSS driver wants the w & h in rotated orientation */ 175 if (drm_rotation_90_or_270(state->rotation)) 176 swap(info->width, info->height); 177 178 x = state->src_x >> 16; 179 y = state->src_y >> 16; 180 181 if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) { 182 uint32_t w = state->src_w >> 16; 183 uint32_t h = state->src_h >> 16; 184 185 orient = drm_rotation_to_tiler(state->rotation); 186 187 /* 188 * omap_gem_rotated_paddr() wants the x & y in tiler units. 189 * Usually tiler unit size is the same as the pixel size, except 190 * for YUV422 formats, for which the tiler unit size is 32 bits 191 * and pixel size is 16 bits. 192 */ 193 if (fb->format->format == DRM_FORMAT_UYVY || 194 fb->format->format == DRM_FORMAT_YUYV) { 195 x /= 2; 196 w /= 2; 197 } 198 199 /* adjust x,y offset for invert: */ 200 if (orient & MASK_Y_INVERT) 201 y += h - 1; 202 if (orient & MASK_X_INVERT) 203 x += w - 1; 204 205 /* Note: x and y are in TILER units, not pixels */ 206 omap_gem_rotated_dma_addr(plane->bo, orient, x, y, 207 &info->paddr); 208 info->rotation_type = OMAP_DSS_ROT_TILER; 209 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0; 210 /* Note: stride in TILER units, not pixels */ 211 info->screen_width = omap_gem_tiled_stride(plane->bo, orient); 212 } else { 213 switch (state->rotation & DRM_MODE_ROTATE_MASK) { 214 case 0: 215 case DRM_MODE_ROTATE_0: 216 /* OK */ 217 break; 218 219 default: 220 dev_warn(fb->dev->dev, 221 "rotation '%d' ignored for non-tiled fb\n", 222 state->rotation); 223 break; 224 } 225 226 info->paddr = get_linear_addr(plane, format, 0, x, y); 227 info->rotation_type = OMAP_DSS_ROT_NONE; 228 info->rotation = DRM_MODE_ROTATE_0; 229 info->screen_width = plane->pitch; 230 } 231 232 /* convert to pixels: */ 233 info->screen_width /= format->cpp[0]; 234 235 if (fb->format->format == DRM_FORMAT_NV12) { 236 plane = &omap_fb->planes[1]; 237 238 if (info->rotation_type == OMAP_DSS_ROT_TILER) { 239 WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED)); 240 omap_gem_rotated_dma_addr(plane->bo, orient, x/2, y/2, 241 &info->p_uv_addr); 242 } else { 243 info->p_uv_addr = get_linear_addr(plane, format, 1, x, y); 244 } 245 } else { 246 info->p_uv_addr = 0; 247 } 248 } 249 250 /* pin, prepare for scanout: */ 251 int omap_framebuffer_pin(struct drm_framebuffer *fb) 252 { 253 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 254 int ret, i, n = fb->format->num_planes; 255 256 mutex_lock(&omap_fb->lock); 257 258 if (omap_fb->pin_count > 0) { 259 omap_fb->pin_count++; 260 mutex_unlock(&omap_fb->lock); 261 return 0; 262 } 263 264 for (i = 0; i < n; i++) { 265 struct plane *plane = &omap_fb->planes[i]; 266 ret = omap_gem_pin(plane->bo, &plane->dma_addr); 267 if (ret) 268 goto fail; 269 omap_gem_dma_sync_buffer(plane->bo, DMA_TO_DEVICE); 270 } 271 272 omap_fb->pin_count++; 273 274 mutex_unlock(&omap_fb->lock); 275 276 return 0; 277 278 fail: 279 for (i--; i >= 0; i--) { 280 struct plane *plane = &omap_fb->planes[i]; 281 omap_gem_unpin(plane->bo); 282 plane->dma_addr = 0; 283 } 284 285 mutex_unlock(&omap_fb->lock); 286 287 return ret; 288 } 289 290 /* unpin, no longer being scanned out: */ 291 void omap_framebuffer_unpin(struct drm_framebuffer *fb) 292 { 293 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 294 int i, n = fb->format->num_planes; 295 296 mutex_lock(&omap_fb->lock); 297 298 omap_fb->pin_count--; 299 300 if (omap_fb->pin_count > 0) { 301 mutex_unlock(&omap_fb->lock); 302 return; 303 } 304 305 for (i = 0; i < n; i++) { 306 struct plane *plane = &omap_fb->planes[i]; 307 omap_gem_unpin(plane->bo); 308 plane->dma_addr = 0; 309 } 310 311 mutex_unlock(&omap_fb->lock); 312 } 313 314 /* iterate thru all the connectors, returning ones that are attached 315 * to the same fb.. 316 */ 317 struct drm_connector *omap_framebuffer_get_next_connector( 318 struct drm_framebuffer *fb, struct drm_connector *from) 319 { 320 struct drm_device *dev = fb->dev; 321 struct list_head *connector_list = &dev->mode_config.connector_list; 322 struct drm_connector *connector = from; 323 324 if (!from) 325 return list_first_entry_or_null(connector_list, typeof(*from), 326 head); 327 328 list_for_each_entry_from(connector, connector_list, head) { 329 if (connector != from) { 330 struct drm_encoder *encoder = connector->encoder; 331 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; 332 if (crtc && crtc->primary->fb == fb) 333 return connector; 334 335 } 336 } 337 338 return NULL; 339 } 340 341 #ifdef CONFIG_DEBUG_FS 342 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 343 { 344 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 345 int i, n = fb->format->num_planes; 346 347 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height, 348 (char *)&fb->format->format); 349 350 for (i = 0; i < n; i++) { 351 struct plane *plane = &omap_fb->planes[i]; 352 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 353 i, plane->offset, plane->pitch); 354 omap_gem_describe(plane->bo, m); 355 } 356 } 357 #endif 358 359 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev, 360 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 361 { 362 unsigned int num_planes = drm_format_num_planes(mode_cmd->pixel_format); 363 struct drm_gem_object *bos[4]; 364 struct drm_framebuffer *fb; 365 int i; 366 367 for (i = 0; i < num_planes; i++) { 368 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 369 if (!bos[i]) { 370 fb = ERR_PTR(-ENOENT); 371 goto error; 372 } 373 } 374 375 fb = omap_framebuffer_init(dev, mode_cmd, bos); 376 if (IS_ERR(fb)) 377 goto error; 378 379 return fb; 380 381 error: 382 while (--i >= 0) 383 drm_gem_object_unreference_unlocked(bos[i]); 384 385 return fb; 386 } 387 388 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev, 389 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 390 { 391 const struct drm_format_info *format = NULL; 392 struct omap_framebuffer *omap_fb = NULL; 393 struct drm_framebuffer *fb = NULL; 394 unsigned int pitch = mode_cmd->pitches[0]; 395 int ret, i; 396 397 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 398 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 399 (char *)&mode_cmd->pixel_format); 400 401 format = drm_format_info(mode_cmd->pixel_format); 402 403 for (i = 0; i < ARRAY_SIZE(formats); i++) { 404 if (formats[i] == mode_cmd->pixel_format) 405 break; 406 } 407 408 if (!format || i == ARRAY_SIZE(formats)) { 409 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n", 410 (char *)&mode_cmd->pixel_format); 411 ret = -EINVAL; 412 goto fail; 413 } 414 415 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL); 416 if (!omap_fb) { 417 ret = -ENOMEM; 418 goto fail; 419 } 420 421 fb = &omap_fb->base; 422 omap_fb->format = format; 423 mutex_init(&omap_fb->lock); 424 425 /* 426 * The code below assumes that no format use more than two planes, and 427 * that the two planes of multiplane formats need the same number of 428 * bytes per pixel. 429 */ 430 if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) { 431 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n"); 432 ret = -EINVAL; 433 goto fail; 434 } 435 436 if (pitch % format->cpp[0]) { 437 dev_dbg(dev->dev, 438 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n", 439 pitch, format->cpp[0]); 440 ret = -EINVAL; 441 goto fail; 442 } 443 444 for (i = 0; i < format->num_planes; i++) { 445 struct plane *plane = &omap_fb->planes[i]; 446 unsigned int vsub = i == 0 ? 1 : format->vsub; 447 unsigned int size; 448 449 size = pitch * mode_cmd->height / vsub; 450 451 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) { 452 dev_dbg(dev->dev, 453 "provided buffer object is too small! %zu < %d\n", 454 bos[i]->size - mode_cmd->offsets[i], size); 455 ret = -EINVAL; 456 goto fail; 457 } 458 459 plane->bo = bos[i]; 460 plane->offset = mode_cmd->offsets[i]; 461 plane->pitch = pitch; 462 plane->dma_addr = 0; 463 } 464 465 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 466 467 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs); 468 if (ret) { 469 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 470 goto fail; 471 } 472 473 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 474 475 return fb; 476 477 fail: 478 kfree(omap_fb); 479 480 return ERR_PTR(ret); 481 } 482