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