mediatek.c

   1 /*
   2  * Copyright 2015 The Chromium OS Authors. All rights reserved.
   3  * Use of this source code is governed by a BSD-style license that can be
   4  * found in the LICENSE file.
   5  */
   6
   7 #ifdef DRV_MEDIATEK
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <sys/mman.h>
  12 #include <xf86drm.h>
  13 #include <mediatek_drm.h>
  14
  15 #include "drv_priv.h"
  16 #include "helpers.h"
  17 #include "util.h"
  18
  19 static const uint32_t supported_formats[] = {
  20         DRM_FORMAT_ABGR8888, DRM_FORMAT_ARGB8888, DRM_FORMAT_RGB565,
  21         DRM_FORMAT_XBGR8888, DRM_FORMAT_XRGB8888, DRM_FORMAT_YVU420
  22 };
  23
  24 static int mediatek_init(struct driver *drv)
  25 {
  26         return drv_add_linear_combinations(drv, supported_formats,
  27                                            ARRAY_SIZE(supported_formats));
  28 }
  29
  30 static int mediatek_bo_create(struct bo *bo, uint32_t width, uint32_t height,
  31                               uint32_t format, uint32_t flags)
  32 {
  33         int ret;
  34         size_t plane;
  35         struct drm_mtk_gem_create gem_create;
  36         uint32_t bytes_per_pixel = drv_stride_from_format(format, 1, 0);
  37
  38         /*
  39          * Since the ARM L1 cache line size is 64 bytes, align to that as a
  40          * performance optimization.
  41          */
  42         width = ALIGN(width, DIV_ROUND_UP(64, bytes_per_pixel));
  43         drv_bo_from_format(bo, width, height, format);
  44
  45         memset(&gem_create, 0, sizeof(gem_create));
  46         gem_create.size = bo->total_size;
  47
  48         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_CREATE, &gem_create);
  49         if (ret) {
  50                 fprintf(stderr, "drv: DRM_IOCTL_MTK_GEM_CREATE failed "
  51                                 "(size=%llu)\n", gem_create.size);
  52                 return ret;
  53         }
  54
  55         for (plane = 0; plane < bo->num_planes; plane++)
  56                 bo->handles[plane].u32 = gem_create.handle;
  57
  58         return 0;
  59 }
  60
  61 static void *mediatek_bo_map(struct bo *bo, struct map_info *data, size_t plane)
  62 {
  63         int ret;
  64         struct drm_mtk_gem_map_off gem_map;
  65
  66         memset(&gem_map, 0, sizeof(gem_map));
  67         gem_map.handle = bo->handles[0].u32;
  68
  69         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_MAP_OFFSET, &gem_map);
  70         if (ret) {
  71                 fprintf(stderr,"drv: DRM_IOCTL_MTK_GEM_MAP_OFFSET failed\n");
  72                 return MAP_FAILED;
  73         }
  74
  75         data->length = bo->total_size;
  76
  77         return mmap(0, bo->total_size, PROT_READ | PROT_WRITE, MAP_SHARED,
  78                     bo->drv->fd, gem_map.offset);
  79 }
  80
  81 static uint32_t mediatek_resolve_format(uint32_t format)
  82 {
  83         switch (format) {
  84         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
  85                 /*HACK: See b/28671744 */
  86                 return DRM_FORMAT_XBGR8888;
  87         case DRM_FORMAT_FLEX_YCbCr_420_888:
  88                 return DRM_FORMAT_YVU420;
  89         default:
  90                 return format;
  91         }
  92 }
  93
  94 struct backend backend_mediatek =
  95 {
  96         .name = "mediatek",
  97         .init = mediatek_init,
  98         .bo_create = mediatek_bo_create,
  99         .bo_destroy = drv_gem_bo_destroy,
 100         .bo_import = drv_prime_bo_import,
 101         .bo_map = mediatek_bo_map,
 102         .resolve_format = mediatek_resolve_format,
 103 };
 104
 105 #endif