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