drivers/staging/omapdrm/omap_fb.c

   1 /*
   2  * drivers/staging/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         const struct format *format;
  90         struct plane planes[4];
  91 };
  92
  93 static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
  94                 struct drm_file *file_priv,
  95                 unsigned int *handle)
  96 {
  97         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
  98         return drm_gem_handle_create(file_priv,
  99                         omap_fb->planes[0].bo, handle);
 100 }
 101
 102 static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
 103 {
 104         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 105         int i, n = drm_format_num_planes(fb->pixel_format);
 106
 107         DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
 108
 109         drm_framebuffer_cleanup(fb);
 110
 111         for (i = 0; i < n; i++) {
 112                 struct plane *plane = &omap_fb->planes[i];
 113                 if (plane->bo)
 114                         drm_gem_object_unreference_unlocked(plane->bo);
 115         }
 116
 117         kfree(omap_fb);
 118 }
 119
 120 static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
 121                 struct drm_file *file_priv, unsigned flags, unsigned color,
 122                 struct drm_clip_rect *clips, unsigned num_clips)
 123 {
 124         int i;
 125
 126         for (i = 0; i < num_clips; i++) {
 127                 omap_framebuffer_flush(fb, clips[i].x1, clips[i].y1,
 128                                         clips[i].x2 - clips[i].x1,
 129                                         clips[i].y2 - clips[i].y1);
 130         }
 131
 132         return 0;
 133 }
 134
 135 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
 136         .create_handle = omap_framebuffer_create_handle,
 137         .destroy = omap_framebuffer_destroy,
 138         .dirty = omap_framebuffer_dirty,
 139 };
 140
 141 static uint32_t get_linear_addr(struct plane *plane,
 142                 const struct format *format, int n, int x, int y)
 143 {
 144         uint32_t offset;
 145
 146         offset = plane->offset +
 147                         (x * format->planes[n].stride_bpp) +
 148                         (y * plane->pitch / format->planes[n].sub_y);
 149
 150         return plane->paddr + offset;
 151 }
 152
 153 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
 154  */
 155 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
 156                 struct omap_drm_window *win, struct omap_overlay_info *info)
 157 {
 158         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 159         const struct format *format = omap_fb->format;
 160         struct plane *plane = &omap_fb->planes[0];
 161         uint32_t x, y, orient = 0;
 162
 163         info->color_mode = format->dss_format;
 164
 165         info->pos_x      = win->crtc_x;
 166         info->pos_y      = win->crtc_y;
 167         info->out_width  = win->crtc_w;
 168         info->out_height = win->crtc_h;
 169         info->width      = win->src_w;
 170         info->height     = win->src_h;
 171
 172         x = win->src_x;
 173         y = win->src_y;
 174
 175         if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
 176                 uint32_t w = win->src_w;
 177                 uint32_t h = win->src_h;
 178
 179                 switch (win->rotation & 0xf) {
 180                 default:
 181                         dev_err(fb->dev->dev, "invalid rotation: %02x",
 182                                         (uint32_t)win->rotation);
 183                         /* fallthru to default to no rotation */
 184                 case 0:
 185                 case BIT(DRM_ROTATE_0):
 186                         orient = 0;
 187                         break;
 188                 case BIT(DRM_ROTATE_90):
 189                         orient = MASK_XY_FLIP | MASK_X_INVERT;
 190                         break;
 191                 case BIT(DRM_ROTATE_180):
 192                         orient = MASK_X_INVERT | MASK_Y_INVERT;
 193                         break;
 194                 case BIT(DRM_ROTATE_270):
 195                         orient = MASK_XY_FLIP | MASK_Y_INVERT;
 196                         break;
 197                 }
 198
 199                 if (win->rotation & BIT(DRM_REFLECT_X))
 200                         orient ^= MASK_X_INVERT;
 201
 202                 if (win->rotation & BIT(DRM_REFLECT_Y))
 203                         orient ^= MASK_Y_INVERT;
 204
 205                 /* adjust x,y offset for flip/invert: */
 206                 if (orient & MASK_XY_FLIP)
 207                         swap(w, h);
 208                 if (orient & MASK_Y_INVERT)
 209                         y += h - 1;
 210                 if (orient & MASK_X_INVERT)
 211                         x += w - 1;
 212
 213                 omap_gem_rotated_paddr(plane->bo, orient, x, y, &info->paddr);
 214                 info->rotation_type = OMAP_DSS_ROT_TILER;
 215                 info->screen_width  = omap_gem_tiled_stride(plane->bo, orient);
 216         } else {
 217                 info->paddr         = get_linear_addr(plane, format, 0, x, y);
 218                 info->rotation_type = OMAP_DSS_ROT_DMA;
 219                 info->screen_width  = plane->pitch;
 220         }
 221
 222         /* convert to pixels: */
 223         info->screen_width /= format->planes[0].stride_bpp;
 224
 225         if (format->dss_format == OMAP_DSS_COLOR_NV12) {
 226                 plane = &omap_fb->planes[1];
 227
 228                 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
 229                         WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
 230                         omap_gem_rotated_paddr(plane->bo, orient,
 231                                         x/2, y/2, &info->p_uv_addr);
 232                 } else {
 233                         info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
 234                 }
 235         } else {
 236                 info->p_uv_addr = 0;
 237         }
 238 }
 239
 240 /* Call for unpin 'a' (if not NULL), and pin 'b' (if not NULL).  Although
 241  * buffers to unpin are just pushed to the unpin fifo so that the
 242  * caller can defer unpin until vblank.
 243  *
 244  * Note if this fails (ie. something went very wrong!), all buffers are
 245  * unpinned, and the caller disables the overlay.  We could have tried
 246  * to revert back to the previous set of pinned buffers but if things are
 247  * hosed there is no guarantee that would succeed.
 248  */
 249 int omap_framebuffer_replace(struct drm_framebuffer *a,
 250                 struct drm_framebuffer *b, void *arg,
 251                 void (*unpin)(void *arg, struct drm_gem_object *bo))
 252 {
 253         int ret = 0, i, na, nb;
 254         struct omap_framebuffer *ofba = to_omap_framebuffer(a);
 255         struct omap_framebuffer *ofbb = to_omap_framebuffer(b);
 256
 257         na = a ? drm_format_num_planes(a->pixel_format) : 0;
 258         nb = b ? drm_format_num_planes(b->pixel_format) : 0;
 259
 260         for (i = 0; i < max(na, nb); i++) {
 261                 struct plane *pa, *pb;
 262
 263                 pa = (i < na) ? &ofba->planes[i] : NULL;
 264                 pb = (i < nb) ? &ofbb->planes[i] : NULL;
 265
 266                 if (pa) {
 267                         unpin(arg, pa->bo);
 268                         pa->paddr = 0;
 269                 }
 270
 271                 if (pb && !ret) {
 272                         ret = omap_gem_get_paddr(pb->bo, &pb->paddr, true);
 273                         if (!ret)
 274                                 omap_gem_dma_sync(pb->bo, DMA_TO_DEVICE);
 275                 }
 276         }
 277
 278         if (ret) {
 279                 /* something went wrong.. unpin what has been pinned */
 280                 for (i = 0; i < nb; i++) {
 281                         struct plane *pb = &ofba->planes[i];
 282                         if (pb->paddr) {
 283                                 unpin(arg, pb->bo);
 284                                 pb->paddr = 0;
 285                         }
 286                 }
 287         }
 288
 289         return ret;
 290 }
 291
 292 struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)
 293 {
 294         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 295         if (p >= drm_format_num_planes(fb->pixel_format))
 296                 return NULL;
 297         return omap_fb->planes[p].bo;
 298 }
 299
 300 /* iterate thru all the connectors, returning ones that are attached
 301  * to the same fb..
 302  */
 303 struct drm_connector *omap_framebuffer_get_next_connector(
 304                 struct drm_framebuffer *fb, struct drm_connector *from)
 305 {
 306         struct drm_device *dev = fb->dev;
 307         struct list_head *connector_list = &dev->mode_config.connector_list;
 308         struct drm_connector *connector = from;
 309
 310         if (!from) {
 311                 return list_first_entry(connector_list, typeof(*from), head);
 312         }
 313
 314         list_for_each_entry_from(connector, connector_list, head) {
 315                 if (connector != from) {
 316                         struct drm_encoder *encoder = connector->encoder;
 317                         struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
 318                         if (crtc && crtc->fb == fb) {
 319                                 return connector;
 320                         }
 321                 }
 322         }
 323
 324         return NULL;
 325 }
 326
 327 /* flush an area of the framebuffer (in case of manual update display that
 328  * is not automatically flushed)
 329  */
 330 void omap_framebuffer_flush(struct drm_framebuffer *fb,
 331                 int x, int y, int w, int h)
 332 {
 333         struct drm_connector *connector = NULL;
 334
 335         VERB("flush: %d,%d %dx%d, fb=%p", x, y, w, h, fb);
 336
 337         while ((connector = omap_framebuffer_get_next_connector(fb, connector))) {
 338                 /* only consider connectors that are part of a chain */
 339                 if (connector->encoder && connector->encoder->crtc) {
 340                         /* TODO: maybe this should propagate thru the crtc who
 341                          * could do the coordinate translation..
 342                          */
 343                         struct drm_crtc *crtc = connector->encoder->crtc;
 344                         int cx = max(0, x - crtc->x);
 345                         int cy = max(0, y - crtc->y);
 346                         int cw = w + (x - crtc->x) - cx;
 347                         int ch = h + (y - crtc->y) - cy;
 348
 349                         omap_connector_flush(connector, cx, cy, cw, ch);
 350                 }
 351         }
 352 }
 353
 354 #ifdef CONFIG_DEBUG_FS
 355 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
 356 {
 357         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 358         int i, n = drm_format_num_planes(fb->pixel_format);
 359
 360         seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
 361                         (char *)&fb->pixel_format);
 362
 363         for (i = 0; i < n; i++) {
 364                 struct plane *plane = &omap_fb->planes[i];
 365                 seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
 366                                 i, plane->offset, plane->pitch);
 367                 omap_gem_describe(plane->bo, m);
 368         }
 369 }
 370 #endif
 371
 372 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
 373                 struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd)
 374 {
 375         struct drm_gem_object *bos[4];
 376         struct drm_framebuffer *fb;
 377         int ret;
 378
 379         ret = objects_lookup(dev, file, mode_cmd->pixel_format,
 380                         bos, mode_cmd->handles);
 381         if (ret)
 382                 return ERR_PTR(ret);
 383
 384         fb = omap_framebuffer_init(dev, mode_cmd, bos);
 385         if (IS_ERR(fb)) {
 386                 int i, n = drm_format_num_planes(mode_cmd->pixel_format);
 387                 for (i = 0; i < n; i++)
 388                         drm_gem_object_unreference_unlocked(bos[i]);
 389                 return fb;
 390         }
 391         return fb;
 392 }
 393
 394 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 395                 struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
 396 {
 397         struct omap_framebuffer *omap_fb;
 398         struct drm_framebuffer *fb = NULL;
 399         const struct format *format = NULL;
 400         int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
 401
 402         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
 403                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
 404                         (char *)&mode_cmd->pixel_format);
 405
 406         for (i = 0; i < ARRAY_SIZE(formats); i++) {
 407                 if (formats[i].pixel_format == mode_cmd->pixel_format) {
 408                         format = &formats[i];
 409                         break;
 410                 }
 411         }
 412
 413         if (!format) {
 414                 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
 415                                 (char *)&mode_cmd->pixel_format);
 416                 ret = -EINVAL;
 417                 goto fail;
 418         }
 419
 420         omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
 421         if (!omap_fb) {
 422                 dev_err(dev->dev, "could not allocate fb\n");
 423                 ret = -ENOMEM;
 424                 goto fail;
 425         }
 426
 427         fb = &omap_fb->base;
 428         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
 429         if (ret) {
 430                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 431                 goto fail;
 432         }
 433
 434         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
 435
 436         omap_fb->format = format;
 437
 438         for (i = 0; i < n; i++) {
 439                 struct plane *plane = &omap_fb->planes[i];
 440                 int size, pitch = mode_cmd->pitches[i];
 441
 442                 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
 443                         dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
 444                                         pitch, mode_cmd->width * format->planes[i].stride_bpp);
 445                         ret = -EINVAL;
 446                         goto fail;
 447                 }
 448
 449                 size = pitch * mode_cmd->height / format->planes[i].sub_y;
 450
 451                 if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) {
 452                         dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
 453                                         bos[i]->size - mode_cmd->offsets[i], size);
 454                         ret = -EINVAL;
 455                         goto fail;
 456                 }
 457
 458                 plane->bo     = bos[i];
 459                 plane->offset = mode_cmd->offsets[i];
 460                 plane->pitch  = pitch;
 461                 plane->paddr  = 0;
 462         }
 463
 464         drm_helper_mode_fill_fb_struct(fb, mode_cmd);
 465
 466         return fb;
 467
 468 fail:
 469         if (fb) {
 470                 omap_framebuffer_destroy(fb);
 471         }
 472         return ERR_PTR(ret);
 473 }