kernel/drivers/gpu/drm/omapdrm/omap_fb.c

   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 "omap_drv.h"
  21 #include "omap_dmm_tiler.h"
  22
  23 #include "drm_crtc.h"
  24 #include "drm_crtc_helper.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 };
  93
  94 static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
  95                 struct drm_file *file_priv,
  96                 unsigned int *handle)
  97 {
  98         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
  99         return drm_gem_handle_create(file_priv,
 100                         omap_fb->planes[0].bo, handle);
 101 }
 102
 103 static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
 104 {
 105         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 106         int i, n = drm_format_num_planes(fb->pixel_format);
 107
 108         DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
 109
 110         drm_framebuffer_cleanup(fb);
 111
 112         for (i = 0; i < n; i++) {
 113                 struct plane *plane = &omap_fb->planes[i];
 114                 if (plane->bo)
 115                         drm_gem_object_unreference_unlocked(plane->bo);
 116         }
 117
 118         kfree(omap_fb);
 119 }
 120
 121 static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
 122                 struct drm_file *file_priv, unsigned flags, unsigned color,
 123                 struct drm_clip_rect *clips, unsigned num_clips)
 124 {
 125         return 0;
 126 }
 127
 128 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
 129         .create_handle = omap_framebuffer_create_handle,
 130         .destroy = omap_framebuffer_destroy,
 131         .dirty = omap_framebuffer_dirty,
 132 };
 133
 134 static uint32_t get_linear_addr(struct plane *plane,
 135                 const struct format *format, int n, int x, int y)
 136 {
 137         uint32_t offset;
 138
 139         offset = plane->offset +
 140                         (x * format->planes[n].stride_bpp) +
 141                         (y * plane->pitch / format->planes[n].sub_y);
 142
 143         return plane->paddr + offset;
 144 }
 145
 146 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
 147  */
 148 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
 149                 struct omap_drm_window *win, struct omap_overlay_info *info)
 150 {
 151         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 152         const struct format *format = omap_fb->format;
 153         struct plane *plane = &omap_fb->planes[0];
 154         uint32_t x, y, orient = 0;
 155
 156         info->color_mode = format->dss_format;
 157
 158         info->pos_x      = win->crtc_x;
 159         info->pos_y      = win->crtc_y;
 160         info->out_width  = win->crtc_w;
 161         info->out_height = win->crtc_h;
 162         info->width      = win->src_w;
 163         info->height     = win->src_h;
 164
 165         x = win->src_x;
 166         y = win->src_y;
 167
 168         if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
 169                 uint32_t w = win->src_w;
 170                 uint32_t h = win->src_h;
 171
 172                 switch (win->rotation & 0xf) {
 173                 default:
 174                         dev_err(fb->dev->dev, "invalid rotation: %02x",
 175                                         (uint32_t)win->rotation);
 176                         /* fallthru to default to no rotation */
 177                 case 0:
 178                 case BIT(DRM_ROTATE_0):
 179                         orient = 0;
 180                         break;
 181                 case BIT(DRM_ROTATE_90):
 182                         orient = MASK_XY_FLIP | MASK_X_INVERT;
 183                         break;
 184                 case BIT(DRM_ROTATE_180):
 185                         orient = MASK_X_INVERT | MASK_Y_INVERT;
 186                         break;
 187                 case BIT(DRM_ROTATE_270):
 188                         orient = MASK_XY_FLIP | MASK_Y_INVERT;
 189                         break;
 190                 }
 191
 192                 if (win->rotation & BIT(DRM_REFLECT_X))
 193                         orient ^= MASK_X_INVERT;
 194
 195                 if (win->rotation & BIT(DRM_REFLECT_Y))
 196                         orient ^= MASK_Y_INVERT;
 197
 198                 /* adjust x,y offset for flip/invert: */
 199                 if (orient & MASK_XY_FLIP)
 200                         swap(w, h);
 201                 if (orient & MASK_Y_INVERT)
 202                         y += h - 1;
 203                 if (orient & MASK_X_INVERT)
 204                         x += w - 1;
 205
 206                 omap_gem_rotated_paddr(plane->bo, orient, x, y, &info->paddr);
 207                 info->rotation_type = OMAP_DSS_ROT_TILER;
 208                 info->screen_width  = omap_gem_tiled_stride(plane->bo, orient);
 209         } else {
 210                 switch (win->rotation & 0xf) {
 211                 case 0:
 212                 case BIT(DRM_ROTATE_0):
 213                         /* OK */
 214                         break;
 215
 216                 default:
 217                         dev_warn(fb->dev->dev,
 218                                 "rotation '%d' ignored for non-tiled fb\n",
 219                                 win->rotation);
 220                         win->rotation = 0;
 221                         break;
 222                 }
 223
 224                 info->paddr         = get_linear_addr(plane, format, 0, x, y);
 225                 info->rotation_type = OMAP_DSS_ROT_DMA;
 226                 info->screen_width  = plane->pitch;
 227         }
 228
 229         /* convert to pixels: */
 230         info->screen_width /= format->planes[0].stride_bpp;
 231
 232         if (format->dss_format == OMAP_DSS_COLOR_NV12) {
 233                 plane = &omap_fb->planes[1];
 234
 235                 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
 236                         WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
 237                         omap_gem_rotated_paddr(plane->bo, orient,
 238                                         x/2, y/2, &info->p_uv_addr);
 239                 } else {
 240                         info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
 241                 }
 242         } else {
 243                 info->p_uv_addr = 0;
 244         }
 245 }
 246
 247 /* pin, prepare for scanout: */
 248 int omap_framebuffer_pin(struct drm_framebuffer *fb)
 249 {
 250         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 251         int ret, i, n = drm_format_num_planes(fb->pixel_format);
 252
 253         if (omap_fb->pin_count > 0) {
 254                 omap_fb->pin_count++;
 255                 return 0;
 256         }
 257
 258         for (i = 0; i < n; i++) {
 259                 struct plane *plane = &omap_fb->planes[i];
 260                 ret = omap_gem_get_paddr(plane->bo, &plane->paddr, true);
 261                 if (ret)
 262                         goto fail;
 263                 omap_gem_dma_sync(plane->bo, DMA_TO_DEVICE);
 264         }
 265
 266         omap_fb->pin_count++;
 267
 268         return 0;
 269
 270 fail:
 271         for (i--; i >= 0; i--) {
 272                 struct plane *plane = &omap_fb->planes[i];
 273                 omap_gem_put_paddr(plane->bo);
 274                 plane->paddr = 0;
 275         }
 276
 277         return ret;
 278 }
 279
 280 /* unpin, no longer being scanned out: */
 281 int omap_framebuffer_unpin(struct drm_framebuffer *fb)
 282 {
 283         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 284         int ret, i, n = drm_format_num_planes(fb->pixel_format);
 285
 286         omap_fb->pin_count--;
 287
 288         if (omap_fb->pin_count > 0)
 289                 return 0;
 290
 291         for (i = 0; i < n; i++) {
 292                 struct plane *plane = &omap_fb->planes[i];
 293                 ret = omap_gem_put_paddr(plane->bo);
 294                 if (ret)
 295                         goto fail;
 296                 plane->paddr = 0;
 297         }
 298
 299         return 0;
 300
 301 fail:
 302         return ret;
 303 }
 304
 305 struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)
 306 {
 307         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 308         if (p >= drm_format_num_planes(fb->pixel_format))
 309                 return NULL;
 310         return omap_fb->planes[p].bo;
 311 }
 312
 313 /* iterate thru all the connectors, returning ones that are attached
 314  * to the same fb..
 315  */
 316 struct drm_connector *omap_framebuffer_get_next_connector(
 317                 struct drm_framebuffer *fb, struct drm_connector *from)
 318 {
 319         struct drm_device *dev = fb->dev;
 320         struct list_head *connector_list = &dev->mode_config.connector_list;
 321         struct drm_connector *connector = from;
 322
 323         if (!from)
 324                 return list_first_entry_or_null(connector_list, typeof(*from),
 325                                                 head);
 326
 327         list_for_each_entry_from(connector, connector_list, head) {
 328                 if (connector != from) {
 329                         struct drm_encoder *encoder = connector->encoder;
 330                         struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
 331                         if (crtc && crtc->primary->fb == fb)
 332                                 return connector;
 333
 334                 }
 335         }
 336
 337         return NULL;
 338 }
 339
 340 #ifdef CONFIG_DEBUG_FS
 341 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
 342 {
 343         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 344         int i, n = drm_format_num_planes(fb->pixel_format);
 345
 346         seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
 347                         (char *)&fb->pixel_format);
 348
 349         for (i = 0; i < n; i++) {
 350                 struct plane *plane = &omap_fb->planes[i];
 351                 seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
 352                                 i, plane->offset, plane->pitch);
 353                 omap_gem_describe(plane->bo, m);
 354         }
 355 }
 356 #endif
 357
 358 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
 359                 struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd)
 360 {
 361         struct drm_gem_object *bos[4];
 362         struct drm_framebuffer *fb;
 363         int ret;
 364
 365         ret = objects_lookup(dev, file, mode_cmd->pixel_format,
 366                         bos, mode_cmd->handles);
 367         if (ret)
 368                 return ERR_PTR(ret);
 369
 370         fb = omap_framebuffer_init(dev, mode_cmd, bos);
 371         if (IS_ERR(fb)) {
 372                 int i, n = drm_format_num_planes(mode_cmd->pixel_format);
 373                 for (i = 0; i < n; i++)
 374                         drm_gem_object_unreference_unlocked(bos[i]);
 375                 return fb;
 376         }
 377         return fb;
 378 }
 379
 380 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 381                 struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
 382 {
 383         struct omap_framebuffer *omap_fb = NULL;
 384         struct drm_framebuffer *fb = NULL;
 385         const struct format *format = NULL;
 386         int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
 387
 388         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
 389                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
 390                         (char *)&mode_cmd->pixel_format);
 391
 392         for (i = 0; i < ARRAY_SIZE(formats); i++) {
 393                 if (formats[i].pixel_format == mode_cmd->pixel_format) {
 394                         format = &formats[i];
 395                         break;
 396                 }
 397         }
 398
 399         if (!format) {
 400                 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
 401                                 (char *)&mode_cmd->pixel_format);
 402                 ret = -EINVAL;
 403                 goto fail;
 404         }
 405
 406         omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
 407         if (!omap_fb) {
 408                 ret = -ENOMEM;
 409                 goto fail;
 410         }
 411
 412         fb = &omap_fb->base;
 413         omap_fb->format = format;
 414
 415         for (i = 0; i < n; i++) {
 416                 struct plane *plane = &omap_fb->planes[i];
 417                 int size, pitch = mode_cmd->pitches[i];
 418
 419                 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
 420                         dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
 421                                         pitch, mode_cmd->width * format->planes[i].stride_bpp);
 422                         ret = -EINVAL;
 423                         goto fail;
 424                 }
 425
 426                 if (pitch % format->planes[i].stride_bpp != 0) {
 427                         dev_err(dev->dev,
 428                                 "buffer pitch (%d bytes) is not a multiple of pixel size (%d bytes)\n",
 429                                 pitch, format->planes[i].stride_bpp);
 430                         ret = -EINVAL;
 431                         goto fail;
 432                 }
 433
 434                 size = pitch * mode_cmd->height / format->planes[i].sub_y;
 435
 436                 if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) {
 437                         dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
 438                                         bos[i]->size - mode_cmd->offsets[i], size);
 439                         ret = -EINVAL;
 440                         goto fail;
 441                 }
 442
 443                 plane->bo     = bos[i];
 444                 plane->offset = mode_cmd->offsets[i];
 445                 plane->pitch  = pitch;
 446                 plane->paddr  = 0;
 447         }
 448
 449         drm_helper_mode_fill_fb_struct(fb, mode_cmd);
 450
 451         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
 452         if (ret) {
 453                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 454                 goto fail;
 455         }
 456
 457         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
 458
 459         return fb;
 460
 461 fail:
 462         kfree(omap_fb);
 463
 464         return ERR_PTR(ret);
 465 }