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