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 <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 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
 149 {
 150         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 151         struct plane *plane = &omap_fb->planes[0];
 152
 153         return omap_gem_flags(plane->bo) & OMAP_BO_TILED;
 154 }
 155
 156 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
 157  */
 158 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
 159                 struct omap_drm_window *win, struct omap_overlay_info *info)
 160 {
 161         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 162         const struct format *format = omap_fb->format;
 163         struct plane *plane = &omap_fb->planes[0];
 164         uint32_t x, y, orient = 0;
 165
 166         info->color_mode = format->dss_format;
 167
 168         info->pos_x      = win->crtc_x;
 169         info->pos_y      = win->crtc_y;
 170         info->out_width  = win->crtc_w;
 171         info->out_height = win->crtc_h;
 172         info->width      = win->src_w;
 173         info->height     = win->src_h;
 174
 175         x = win->src_x;
 176         y = win->src_y;
 177
 178         if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
 179                 uint32_t w = win->src_w;
 180                 uint32_t h = win->src_h;
 181
 182                 switch (win->rotation & DRM_ROTATE_MASK) {
 183                 default:
 184                         dev_err(fb->dev->dev, "invalid rotation: %02x",
 185                                         (uint32_t)win->rotation);
 186                         /* fallthru to default to no rotation */
 187                 case 0:
 188                 case BIT(DRM_ROTATE_0):
 189                         orient = 0;
 190                         break;
 191                 case BIT(DRM_ROTATE_90):
 192                         orient = MASK_XY_FLIP | MASK_X_INVERT;
 193                         break;
 194                 case BIT(DRM_ROTATE_180):
 195                         orient = MASK_X_INVERT | MASK_Y_INVERT;
 196                         break;
 197                 case BIT(DRM_ROTATE_270):
 198                         orient = MASK_XY_FLIP | MASK_Y_INVERT;
 199                         break;
 200                 }
 201
 202                 if (win->rotation & BIT(DRM_REFLECT_X))
 203                         orient ^= MASK_X_INVERT;
 204
 205                 if (win->rotation & BIT(DRM_REFLECT_Y))
 206                         orient ^= MASK_Y_INVERT;
 207
 208                 /* adjust x,y offset for flip/invert: */
 209                 if (orient & MASK_XY_FLIP)
 210                         swap(w, h);
 211                 if (orient & MASK_Y_INVERT)
 212                         y += h - 1;
 213                 if (orient & MASK_X_INVERT)
 214                         x += w - 1;
 215
 216                 omap_gem_rotated_paddr(plane->bo, orient, x, y, &info->paddr);
 217                 info->rotation_type = OMAP_DSS_ROT_TILER;
 218                 info->screen_width  = omap_gem_tiled_stride(plane->bo, orient);
 219         } else {
 220                 switch (win->rotation & DRM_ROTATE_MASK) {
 221                 case 0:
 222                 case BIT(DRM_ROTATE_0):
 223                         /* OK */
 224                         break;
 225
 226                 default:
 227                         dev_warn(fb->dev->dev,
 228                                 "rotation '%d' ignored for non-tiled fb\n",
 229                                 win->rotation);
 230                         win->rotation = 0;
 231                         break;
 232                 }
 233
 234                 info->paddr         = get_linear_addr(plane, format, 0, x, y);
 235                 info->rotation_type = OMAP_DSS_ROT_DMA;
 236                 info->screen_width  = plane->pitch;
 237         }
 238
 239         /* convert to pixels: */
 240         info->screen_width /= format->planes[0].stride_bpp;
 241
 242         if (format->dss_format == OMAP_DSS_COLOR_NV12) {
 243                 plane = &omap_fb->planes[1];
 244
 245                 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
 246                         WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
 247                         omap_gem_rotated_paddr(plane->bo, orient,
 248                                         x/2, y/2, &info->p_uv_addr);
 249                 } else {
 250                         info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
 251                 }
 252         } else {
 253                 info->p_uv_addr = 0;
 254         }
 255 }
 256
 257 /* pin, prepare for scanout: */
 258 int omap_framebuffer_pin(struct drm_framebuffer *fb)
 259 {
 260         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 261         int ret, i, n = drm_format_num_planes(fb->pixel_format);
 262
 263         mutex_lock(&omap_fb->lock);
 264
 265         if (omap_fb->pin_count > 0) {
 266                 omap_fb->pin_count++;
 267                 mutex_unlock(&omap_fb->lock);
 268                 return 0;
 269         }
 270
 271         for (i = 0; i < n; i++) {
 272                 struct plane *plane = &omap_fb->planes[i];
 273                 ret = omap_gem_get_paddr(plane->bo, &plane->paddr, true);
 274                 if (ret)
 275                         goto fail;
 276                 omap_gem_dma_sync(plane->bo, DMA_TO_DEVICE);
 277         }
 278
 279         omap_fb->pin_count++;
 280
 281         mutex_unlock(&omap_fb->lock);
 282
 283         return 0;
 284
 285 fail:
 286         for (i--; i >= 0; i--) {
 287                 struct plane *plane = &omap_fb->planes[i];
 288                 omap_gem_put_paddr(plane->bo);
 289                 plane->paddr = 0;
 290         }
 291
 292         mutex_unlock(&omap_fb->lock);
 293
 294         return ret;
 295 }
 296
 297 /* unpin, no longer being scanned out: */
 298 void omap_framebuffer_unpin(struct drm_framebuffer *fb)
 299 {
 300         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 301         int i, n = drm_format_num_planes(fb->pixel_format);
 302
 303         mutex_lock(&omap_fb->lock);
 304
 305         omap_fb->pin_count--;
 306
 307         if (omap_fb->pin_count > 0) {
 308                 mutex_unlock(&omap_fb->lock);
 309                 return;
 310         }
 311
 312         for (i = 0; i < n; i++) {
 313                 struct plane *plane = &omap_fb->planes[i];
 314                 omap_gem_put_paddr(plane->bo);
 315                 plane->paddr = 0;
 316         }
 317
 318         mutex_unlock(&omap_fb->lock);
 319 }
 320
 321 struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)
 322 {
 323         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 324         if (p >= drm_format_num_planes(fb->pixel_format))
 325                 return NULL;
 326         return omap_fb->planes[p].bo;
 327 }
 328
 329 /* iterate thru all the connectors, returning ones that are attached
 330  * to the same fb..
 331  */
 332 struct drm_connector *omap_framebuffer_get_next_connector(
 333                 struct drm_framebuffer *fb, struct drm_connector *from)
 334 {
 335         struct drm_device *dev = fb->dev;
 336         struct list_head *connector_list = &dev->mode_config.connector_list;
 337         struct drm_connector *connector = from;
 338
 339         if (!from)
 340                 return list_first_entry_or_null(connector_list, typeof(*from),
 341                                                 head);
 342
 343         list_for_each_entry_from(connector, connector_list, head) {
 344                 if (connector != from) {
 345                         struct drm_encoder *encoder = connector->encoder;
 346                         struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
 347                         if (crtc && crtc->primary->fb == fb)
 348                                 return connector;
 349
 350                 }
 351         }
 352
 353         return NULL;
 354 }
 355
 356 #ifdef CONFIG_DEBUG_FS
 357 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
 358 {
 359         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 360         int i, n = drm_format_num_planes(fb->pixel_format);
 361
 362         seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
 363                         (char *)&fb->pixel_format);
 364
 365         for (i = 0; i < n; i++) {
 366                 struct plane *plane = &omap_fb->planes[i];
 367                 seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
 368                                 i, plane->offset, plane->pitch);
 369                 omap_gem_describe(plane->bo, m);
 370         }
 371 }
 372 #endif
 373
 374 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
 375                 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
 376 {
 377         struct drm_gem_object *bos[4];
 378         struct drm_framebuffer *fb;
 379         int ret;
 380
 381         ret = objects_lookup(file, mode_cmd->pixel_format,
 382                         bos, mode_cmd->handles);
 383         if (ret)
 384                 return ERR_PTR(ret);
 385
 386         fb = omap_framebuffer_init(dev, mode_cmd, bos);
 387         if (IS_ERR(fb)) {
 388                 int i, n = drm_format_num_planes(mode_cmd->pixel_format);
 389                 for (i = 0; i < n; i++)
 390                         drm_gem_object_unreference_unlocked(bos[i]);
 391                 return fb;
 392         }
 393         return fb;
 394 }
 395
 396 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 397                 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
 398 {
 399         struct omap_framebuffer *omap_fb = NULL;
 400         struct drm_framebuffer *fb = NULL;
 401         const struct format *format = NULL;
 402         int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
 403
 404         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
 405                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
 406                         (char *)&mode_cmd->pixel_format);
 407
 408         for (i = 0; i < ARRAY_SIZE(formats); i++) {
 409                 if (formats[i].pixel_format == mode_cmd->pixel_format) {
 410                         format = &formats[i];
 411                         break;
 412                 }
 413         }
 414
 415         if (!format) {
 416                 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
 417                                 (char *)&mode_cmd->pixel_format);
 418                 ret = -EINVAL;
 419                 goto fail;
 420         }
 421
 422         omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
 423         if (!omap_fb) {
 424                 ret = -ENOMEM;
 425                 goto fail;
 426         }
 427
 428         fb = &omap_fb->base;
 429         omap_fb->format = format;
 430         mutex_init(&omap_fb->lock);
 431
 432         for (i = 0; i < n; i++) {
 433                 struct plane *plane = &omap_fb->planes[i];
 434                 int size, pitch = mode_cmd->pitches[i];
 435
 436                 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
 437                         dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
 438                                         pitch, mode_cmd->width * format->planes[i].stride_bpp);
 439                         ret = -EINVAL;
 440                         goto fail;
 441                 }
 442
 443                 if (pitch % format->planes[i].stride_bpp != 0) {
 444                         dev_err(dev->dev,
 445                                 "buffer pitch (%d bytes) is not a multiple of pixel size (%d bytes)\n",
 446                                 pitch, format->planes[i].stride_bpp);
 447                         ret = -EINVAL;
 448                         goto fail;
 449                 }
 450
 451                 size = pitch * mode_cmd->height / format->planes[i].sub_y;
 452
 453                 if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) {
 454                         dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
 455                                         bos[i]->size - mode_cmd->offsets[i], size);
 456                         ret = -EINVAL;
 457                         goto fail;
 458                 }
 459
 460                 if (i > 0 && pitch != mode_cmd->pitches[i - 1]) {
 461                         dev_err(dev->dev,
 462                                 "pitches are not the same between framebuffer planes %d != %d\n",
 463                                 pitch, mode_cmd->pitches[i - 1]);
 464                         ret = -EINVAL;
 465                         goto fail;
 466                 }
 467
 468                 plane->bo     = bos[i];
 469                 plane->offset = mode_cmd->offsets[i];
 470                 plane->pitch  = pitch;
 471                 plane->paddr  = 0;
 472         }
 473
 474         drm_helper_mode_fill_fb_struct(fb, mode_cmd);
 475
 476         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
 477         if (ret) {
 478                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 479                 goto fail;
 480         }
 481
 482         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
 483
 484         return fb;
 485
 486 fail:
 487         kfree(omap_fb);
 488
 489         return ERR_PTR(ret);
 490 }