drivers/gpu/drm/omapdrm/omap_fb.c

   1 /*
   2  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
   3  * Author: Rob Clark <rob@ti.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <linux/dma-mapping.h>
  19
  20 #include <drm/drm_modeset_helper.h>
  21 #include <drm/drm_fourcc.h>
  22 #include <drm/drm_gem_framebuffer_helper.h>
  23
  24 #include "omap_dmm_tiler.h"
  25 #include "omap_drv.h"
  26
  27 /*
  28  * framebuffer funcs
  29  */
  30
  31 static const u32 formats[] = {
  32         /* 16bpp [A]RGB: */
  33         DRM_FORMAT_RGB565, /* RGB16-565 */
  34         DRM_FORMAT_RGBX4444, /* RGB12x-4444 */
  35         DRM_FORMAT_XRGB4444, /* xRGB12-4444 */
  36         DRM_FORMAT_RGBA4444, /* RGBA12-4444 */
  37         DRM_FORMAT_ARGB4444, /* ARGB16-4444 */
  38         DRM_FORMAT_XRGB1555, /* xRGB15-1555 */
  39         DRM_FORMAT_ARGB1555, /* ARGB16-1555 */
  40         /* 24bpp RGB: */
  41         DRM_FORMAT_RGB888,   /* RGB24-888 */
  42         /* 32bpp [A]RGB: */
  43         DRM_FORMAT_RGBX8888, /* RGBx24-8888 */
  44         DRM_FORMAT_XRGB8888, /* xRGB24-8888 */
  45         DRM_FORMAT_RGBA8888, /* RGBA32-8888 */
  46         DRM_FORMAT_ARGB8888, /* ARGB32-8888 */
  47         /* YUV: */
  48         DRM_FORMAT_NV12,
  49         DRM_FORMAT_YUYV,
  50         DRM_FORMAT_UYVY,
  51 };
  52
  53 /* per-plane info for the fb: */
  54 struct plane {
  55         dma_addr_t dma_addr;
  56 };
  57
  58 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
  59
  60 struct omap_framebuffer {
  61         struct drm_framebuffer base;
  62         int pin_count;
  63         const struct drm_format_info *format;
  64         struct plane planes[2];
  65         /* lock for pinning (pin_count and planes.dma_addr) */
  66         struct mutex lock;
  67 };
  68
  69 static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
  70                                   struct drm_file *file_priv,
  71                                   unsigned flags, unsigned color,
  72                                   struct drm_clip_rect *clips,
  73                                   unsigned num_clips)
  74 {
  75         struct drm_crtc *crtc;
  76
  77         drm_modeset_lock_all(fb->dev);
  78
  79         drm_for_each_crtc(crtc, fb->dev)
  80                 omap_crtc_flush(crtc);
  81
  82         drm_modeset_unlock_all(fb->dev);
  83
  84         return 0;
  85 }
  86
  87 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
  88         .create_handle = drm_gem_fb_create_handle,
  89         .dirty = omap_framebuffer_dirty,
  90         .destroy = drm_gem_fb_destroy,
  91 };
  92
  93 static u32 get_linear_addr(struct drm_framebuffer *fb,
  94                 const struct drm_format_info *format, int n, int x, int y)
  95 {
  96         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
  97         struct plane *plane = &omap_fb->planes[n];
  98         u32 offset;
  99
 100         offset = fb->offsets[n]
 101                + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub))
 102                + (y * fb->pitches[n] / (n == 0 ? 1 : format->vsub));
 103
 104         return plane->dma_addr + offset;
 105 }
 106
 107 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
 108 {
 109         return omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED;
 110 }
 111
 112 /* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */
 113 static u32 drm_rotation_to_tiler(unsigned int drm_rot)
 114 {
 115         u32 orient;
 116
 117         switch (drm_rot & DRM_MODE_ROTATE_MASK) {
 118         default:
 119         case DRM_MODE_ROTATE_0:
 120                 orient = 0;
 121                 break;
 122         case DRM_MODE_ROTATE_90:
 123                 orient = MASK_XY_FLIP | MASK_X_INVERT;
 124                 break;
 125         case DRM_MODE_ROTATE_180:
 126                 orient = MASK_X_INVERT | MASK_Y_INVERT;
 127                 break;
 128         case DRM_MODE_ROTATE_270:
 129                 orient = MASK_XY_FLIP | MASK_Y_INVERT;
 130                 break;
 131         }
 132
 133         if (drm_rot & DRM_MODE_REFLECT_X)
 134                 orient ^= MASK_X_INVERT;
 135
 136         if (drm_rot & DRM_MODE_REFLECT_Y)
 137                 orient ^= MASK_Y_INVERT;
 138
 139         return orient;
 140 }
 141
 142 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
 143  */
 144 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
 145                 struct drm_plane_state *state, struct omap_overlay_info *info)
 146 {
 147         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 148         const struct drm_format_info *format = omap_fb->format;
 149         struct plane *plane = &omap_fb->planes[0];
 150         u32 x, y, orient = 0;
 151
 152         info->fourcc = fb->format->format;
 153
 154         info->pos_x      = state->crtc_x;
 155         info->pos_y      = state->crtc_y;
 156         info->out_width  = state->crtc_w;
 157         info->out_height = state->crtc_h;
 158         info->width      = state->src_w >> 16;
 159         info->height     = state->src_h >> 16;
 160
 161         /* DSS driver wants the w & h in rotated orientation */
 162         if (drm_rotation_90_or_270(state->rotation))
 163                 swap(info->width, info->height);
 164
 165         x = state->src_x >> 16;
 166         y = state->src_y >> 16;
 167
 168         if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED) {
 169                 u32 w = state->src_w >> 16;
 170                 u32 h = state->src_h >> 16;
 171
 172                 orient = drm_rotation_to_tiler(state->rotation);
 173
 174                 /*
 175                  * omap_gem_rotated_paddr() wants the x & y in tiler units.
 176                  * Usually tiler unit size is the same as the pixel size, except
 177                  * for YUV422 formats, for which the tiler unit size is 32 bits
 178                  * and pixel size is 16 bits.
 179                  */
 180                 if (fb->format->format == DRM_FORMAT_UYVY ||
 181                                 fb->format->format == DRM_FORMAT_YUYV) {
 182                         x /= 2;
 183                         w /= 2;
 184                 }
 185
 186                 /* adjust x,y offset for invert: */
 187                 if (orient & MASK_Y_INVERT)
 188                         y += h - 1;
 189                 if (orient & MASK_X_INVERT)
 190                         x += w - 1;
 191
 192                 /* Note: x and y are in TILER units, not pixels */
 193                 omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y,
 194                                           &info->paddr);
 195                 info->rotation_type = OMAP_DSS_ROT_TILER;
 196                 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0;
 197                 /* Note: stride in TILER units, not pixels */
 198                 info->screen_width  = omap_gem_tiled_stride(fb->obj[0], orient);
 199         } else {
 200                 switch (state->rotation & DRM_MODE_ROTATE_MASK) {
 201                 case 0:
 202                 case DRM_MODE_ROTATE_0:
 203                         /* OK */
 204                         break;
 205
 206                 default:
 207                         dev_warn(fb->dev->dev,
 208                                 "rotation '%d' ignored for non-tiled fb\n",
 209                                 state->rotation);
 210                         break;
 211                 }
 212
 213                 info->paddr         = get_linear_addr(fb, format, 0, x, y);
 214                 info->rotation_type = OMAP_DSS_ROT_NONE;
 215                 info->rotation      = DRM_MODE_ROTATE_0;
 216                 info->screen_width  = fb->pitches[0];
 217         }
 218
 219         /* convert to pixels: */
 220         info->screen_width /= format->cpp[0];
 221
 222         if (fb->format->format == DRM_FORMAT_NV12) {
 223                 plane = &omap_fb->planes[1];
 224
 225                 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
 226                         WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED));
 227                         omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2,
 228                                                   &info->p_uv_addr);
 229                 } else {
 230                         info->p_uv_addr = get_linear_addr(fb, format, 1, x, y);
 231                 }
 232         } else {
 233                 info->p_uv_addr = 0;
 234         }
 235 }
 236
 237 /* pin, prepare for scanout: */
 238 int omap_framebuffer_pin(struct drm_framebuffer *fb)
 239 {
 240         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 241         int ret, i, n = fb->format->num_planes;
 242
 243         mutex_lock(&omap_fb->lock);
 244
 245         if (omap_fb->pin_count > 0) {
 246                 omap_fb->pin_count++;
 247                 mutex_unlock(&omap_fb->lock);
 248                 return 0;
 249         }
 250
 251         for (i = 0; i < n; i++) {
 252                 struct plane *plane = &omap_fb->planes[i];
 253                 ret = omap_gem_pin(fb->obj[i], &plane->dma_addr);
 254                 if (ret)
 255                         goto fail;
 256                 omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE);
 257         }
 258
 259         omap_fb->pin_count++;
 260
 261         mutex_unlock(&omap_fb->lock);
 262
 263         return 0;
 264
 265 fail:
 266         for (i--; i >= 0; i--) {
 267                 struct plane *plane = &omap_fb->planes[i];
 268                 omap_gem_unpin(fb->obj[i]);
 269                 plane->dma_addr = 0;
 270         }
 271
 272         mutex_unlock(&omap_fb->lock);
 273
 274         return ret;
 275 }
 276
 277 /* unpin, no longer being scanned out: */
 278 void omap_framebuffer_unpin(struct drm_framebuffer *fb)
 279 {
 280         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 281         int i, n = fb->format->num_planes;
 282
 283         mutex_lock(&omap_fb->lock);
 284
 285         omap_fb->pin_count--;
 286
 287         if (omap_fb->pin_count > 0) {
 288                 mutex_unlock(&omap_fb->lock);
 289                 return;
 290         }
 291
 292         for (i = 0; i < n; i++) {
 293                 struct plane *plane = &omap_fb->planes[i];
 294                 omap_gem_unpin(fb->obj[i]);
 295                 plane->dma_addr = 0;
 296         }
 297
 298         mutex_unlock(&omap_fb->lock);
 299 }
 300
 301 #ifdef CONFIG_DEBUG_FS
 302 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
 303 {
 304         int i, n = fb->format->num_planes;
 305
 306         seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
 307                         (char *)&fb->format->format);
 308
 309         for (i = 0; i < n; i++) {
 310                 seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
 311                                 i, fb->offsets[n], fb->pitches[i]);
 312                 omap_gem_describe(fb->obj[i], m);
 313         }
 314 }
 315 #endif
 316
 317 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
 318                 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
 319 {
 320         const struct drm_format_info *info = drm_get_format_info(dev,
 321                                                                  mode_cmd);
 322         unsigned int num_planes = info->num_planes;
 323         struct drm_gem_object *bos[4];
 324         struct drm_framebuffer *fb;
 325         int i;
 326
 327         for (i = 0; i < num_planes; i++) {
 328                 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
 329                 if (!bos[i]) {
 330                         fb = ERR_PTR(-ENOENT);
 331                         goto error;
 332                 }
 333         }
 334
 335         fb = omap_framebuffer_init(dev, mode_cmd, bos);
 336         if (IS_ERR(fb))
 337                 goto error;
 338
 339         return fb;
 340
 341 error:
 342         while (--i >= 0)
 343                 drm_gem_object_put_unlocked(bos[i]);
 344
 345         return fb;
 346 }
 347
 348 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 349                 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
 350 {
 351         const struct drm_format_info *format = NULL;
 352         struct omap_framebuffer *omap_fb = NULL;
 353         struct drm_framebuffer *fb = NULL;
 354         unsigned int pitch = mode_cmd->pitches[0];
 355         int ret, i;
 356
 357         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
 358                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
 359                         (char *)&mode_cmd->pixel_format);
 360
 361         format = drm_get_format_info(dev, mode_cmd);
 362
 363         for (i = 0; i < ARRAY_SIZE(formats); i++) {
 364                 if (formats[i] == mode_cmd->pixel_format)
 365                         break;
 366         }
 367
 368         if (!format || i == ARRAY_SIZE(formats)) {
 369                 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",
 370                         (char *)&mode_cmd->pixel_format);
 371                 ret = -EINVAL;
 372                 goto fail;
 373         }
 374
 375         omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
 376         if (!omap_fb) {
 377                 ret = -ENOMEM;
 378                 goto fail;
 379         }
 380
 381         fb = &omap_fb->base;
 382         omap_fb->format = format;
 383         mutex_init(&omap_fb->lock);
 384
 385         /*
 386          * The code below assumes that no format use more than two planes, and
 387          * that the two planes of multiplane formats need the same number of
 388          * bytes per pixel.
 389          */
 390         if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
 391                 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
 392                 ret = -EINVAL;
 393                 goto fail;
 394         }
 395
 396         if (pitch % format->cpp[0]) {
 397                 dev_dbg(dev->dev,
 398                         "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
 399                         pitch, format->cpp[0]);
 400                 ret = -EINVAL;
 401                 goto fail;
 402         }
 403
 404         for (i = 0; i < format->num_planes; i++) {
 405                 struct plane *plane = &omap_fb->planes[i];
 406                 unsigned int vsub = i == 0 ? 1 : format->vsub;
 407                 unsigned int size;
 408
 409                 size = pitch * mode_cmd->height / vsub;
 410
 411                 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
 412                         dev_dbg(dev->dev,
 413                                 "provided buffer object is too small! %zu < %d\n",
 414                                 bos[i]->size - mode_cmd->offsets[i], size);
 415                         ret = -EINVAL;
 416                         goto fail;
 417                 }
 418
 419                 fb->obj[i]    = bos[i];
 420                 plane->dma_addr  = 0;
 421         }
 422
 423         drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
 424
 425         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
 426         if (ret) {
 427                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 428                 goto fail;
 429         }
 430
 431         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
 432
 433         return fb;
 434
 435 fail:
 436         kfree(omap_fb);
 437
 438         return ERR_PTR(ret);
 439 }