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                 switch (win->rotation & 0xf) {
 222                 case 0:
 223                 case BIT(DRM_ROTATE_0):
 224                         /* OK */
 225                         break;
 226
 227                 default:
 228                         dev_warn(fb->dev->dev,
 229                                 "rotation '%d' ignored for non-tiled fb\n",
 230                                 win->rotation);
 231                         win->rotation = 0;
 232                         break;
 233                 }
 234
 235                 info->paddr         = get_linear_addr(plane, format, 0, x, y);
 236                 info->rotation_type = OMAP_DSS_ROT_DMA;
 237                 info->screen_width  = plane->pitch;
 238         }
 239
 240         /* convert to pixels: */
 241         info->screen_width /= format->planes[0].stride_bpp;
 242
 243         if (format->dss_format == OMAP_DSS_COLOR_NV12) {
 244                 plane = &omap_fb->planes[1];
 245
 246                 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
 247                         WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
 248                         omap_gem_rotated_paddr(plane->bo, orient,
 249                                         x/2, y/2, &info->p_uv_addr);
 250                 } else {
 251                         info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
 252                 }
 253         } else {
 254                 info->p_uv_addr = 0;
 255         }
 256 }
 257
 258 /* pin, prepare for scanout: */
 259 int omap_framebuffer_pin(struct drm_framebuffer *fb)
 260 {
 261         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 262         int ret, i, n = drm_format_num_planes(fb->pixel_format);
 263
 264         for (i = 0; i < n; i++) {
 265                 struct plane *plane = &omap_fb->planes[i];
 266                 ret = omap_gem_get_paddr(plane->bo, &plane->paddr, true);
 267                 if (ret)
 268                         goto fail;
 269                 omap_gem_dma_sync(plane->bo, DMA_TO_DEVICE);
 270         }
 271
 272         return 0;
 273
 274 fail:
 275         for (i--; i >= 0; i--) {
 276                 struct plane *plane = &omap_fb->planes[i];
 277                 omap_gem_put_paddr(plane->bo);
 278                 plane->paddr = 0;
 279         }
 280
 281         return ret;
 282 }
 283
 284 /* unpin, no longer being scanned out: */
 285 int omap_framebuffer_unpin(struct drm_framebuffer *fb)
 286 {
 287         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 288         int ret, i, n = drm_format_num_planes(fb->pixel_format);
 289
 290         for (i = 0; i < n; i++) {
 291                 struct plane *plane = &omap_fb->planes[i];
 292                 ret = omap_gem_put_paddr(plane->bo);
 293                 if (ret)
 294                         goto fail;
 295                 plane->paddr = 0;
 296         }
 297
 298         return 0;
 299
 300 fail:
 301         return ret;
 302 }
 303
 304 struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)
 305 {
 306         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 307         if (p >= drm_format_num_planes(fb->pixel_format))
 308                 return NULL;
 309         return omap_fb->planes[p].bo;
 310 }
 311
 312 /* iterate thru all the connectors, returning ones that are attached
 313  * to the same fb..
 314  */
 315 struct drm_connector *omap_framebuffer_get_next_connector(
 316                 struct drm_framebuffer *fb, struct drm_connector *from)
 317 {
 318         struct drm_device *dev = fb->dev;
 319         struct list_head *connector_list = &dev->mode_config.connector_list;
 320         struct drm_connector *connector = from;
 321
 322         if (!from)
 323                 return list_first_entry_or_null(connector_list, typeof(*from),
 324                                                 head);
 325
 326         list_for_each_entry_from(connector, connector_list, head) {
 327                 if (connector != from) {
 328                         struct drm_encoder *encoder = connector->encoder;
 329                         struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
 330                         if (crtc && crtc->primary->fb == fb)
 331                                 return connector;
 332
 333                 }
 334         }
 335
 336         return NULL;
 337 }
 338
 339 /* flush an area of the framebuffer (in case of manual update display that
 340  * is not automatically flushed)
 341  */
 342 void omap_framebuffer_flush(struct drm_framebuffer *fb,
 343                 int x, int y, int w, int h)
 344 {
 345         struct drm_connector *connector = NULL;
 346
 347         VERB("flush: %d,%d %dx%d, fb=%p", x, y, w, h, fb);
 348
 349         while ((connector = omap_framebuffer_get_next_connector(fb, connector))) {
 350                 /* only consider connectors that are part of a chain */
 351                 if (connector->encoder && connector->encoder->crtc) {
 352                         /* TODO: maybe this should propagate thru the crtc who
 353                          * could do the coordinate translation..
 354                          */
 355                         struct drm_crtc *crtc = connector->encoder->crtc;
 356                         int cx = max(0, x - crtc->x);
 357                         int cy = max(0, y - crtc->y);
 358                         int cw = w + (x - crtc->x) - cx;
 359                         int ch = h + (y - crtc->y) - cy;
 360
 361                         omap_connector_flush(connector, cx, cy, cw, ch);
 362                 }
 363         }
 364 }
 365
 366 #ifdef CONFIG_DEBUG_FS
 367 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
 368 {
 369         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 370         int i, n = drm_format_num_planes(fb->pixel_format);
 371
 372         seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
 373                         (char *)&fb->pixel_format);
 374
 375         for (i = 0; i < n; i++) {
 376                 struct plane *plane = &omap_fb->planes[i];
 377                 seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
 378                                 i, plane->offset, plane->pitch);
 379                 omap_gem_describe(plane->bo, m);
 380         }
 381 }
 382 #endif
 383
 384 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
 385                 struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd)
 386 {
 387         struct drm_gem_object *bos[4];
 388         struct drm_framebuffer *fb;
 389         int ret;
 390
 391         ret = objects_lookup(dev, file, mode_cmd->pixel_format,
 392                         bos, mode_cmd->handles);
 393         if (ret)
 394                 return ERR_PTR(ret);
 395
 396         fb = omap_framebuffer_init(dev, mode_cmd, bos);
 397         if (IS_ERR(fb)) {
 398                 int i, n = drm_format_num_planes(mode_cmd->pixel_format);
 399                 for (i = 0; i < n; i++)
 400                         drm_gem_object_unreference_unlocked(bos[i]);
 401                 return fb;
 402         }
 403         return fb;
 404 }
 405
 406 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 407                 struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
 408 {
 409         struct omap_framebuffer *omap_fb;
 410         struct drm_framebuffer *fb = NULL;
 411         const struct format *format = NULL;
 412         int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
 413
 414         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
 415                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
 416                         (char *)&mode_cmd->pixel_format);
 417
 418         for (i = 0; i < ARRAY_SIZE(formats); i++) {
 419                 if (formats[i].pixel_format == mode_cmd->pixel_format) {
 420                         format = &formats[i];
 421                         break;
 422                 }
 423         }
 424
 425         if (!format) {
 426                 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
 427                                 (char *)&mode_cmd->pixel_format);
 428                 ret = -EINVAL;
 429                 goto fail;
 430         }
 431
 432         omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
 433         if (!omap_fb) {
 434                 ret = -ENOMEM;
 435                 goto fail;
 436         }
 437
 438         fb = &omap_fb->base;
 439         omap_fb->format = format;
 440
 441         for (i = 0; i < n; i++) {
 442                 struct plane *plane = &omap_fb->planes[i];
 443                 int size, pitch = mode_cmd->pitches[i];
 444
 445                 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
 446                         dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
 447                                         pitch, mode_cmd->width * format->planes[i].stride_bpp);
 448                         ret = -EINVAL;
 449                         goto fail;
 450                 }
 451
 452                 size = pitch * mode_cmd->height / format->planes[i].sub_y;
 453
 454                 if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) {
 455                         dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
 456                                         bos[i]->size - mode_cmd->offsets[i], size);
 457                         ret = -EINVAL;
 458                         goto fail;
 459                 }
 460
 461                 plane->bo     = bos[i];
 462                 plane->offset = mode_cmd->offsets[i];
 463                 plane->pitch  = pitch;
 464                 plane->paddr  = 0;
 465         }
 466
 467         drm_helper_mode_fill_fb_struct(fb, mode_cmd);
 468
 469         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
 470         if (ret) {
 471                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 472                 goto fail;
 473         }
 474
 475         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
 476
 477         return fb;
 478
 479 fail:
 480         if (fb)
 481                 omap_framebuffer_destroy(fb);
 482
 483         return ERR_PTR(ret);
 484 }