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 // clang-format off
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <sys/mman.h>
  13 #include <xf86drm.h>
  14 #include <mediatek_drm.h>
  15 // clang-format on
  16
  17 #include "drv_priv.h"
  18 #include "helpers.h"
  19 #include "util.h"
  20
  21 static const uint32_t supported_formats[] = { DRM_FORMAT_ABGR8888, DRM_FORMAT_ARGB8888,
  22                                               DRM_FORMAT_R8,       DRM_FORMAT_RGB565,
  23                                               DRM_FORMAT_XBGR8888, DRM_FORMAT_XRGB8888,
  24                                               DRM_FORMAT_YVU420,   DRM_FORMAT_YVU420_ANDROID };
  25
  26 static int mediatek_init(struct driver *drv)
  27 {
  28         return drv_add_linear_combinations(drv, supported_formats, ARRAY_SIZE(supported_formats));
  29 }
  30
  31 static int mediatek_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
  32                               uint32_t flags)
  33 {
  34         int ret;
  35         size_t plane;
  36         uint32_t stride;
  37         struct drm_mtk_gem_create gem_create;
  38
  39         /*
  40          * Since the ARM L1 cache line size is 64 bytes, align to that as a
  41          * performance optimization.
  42          */
  43         stride = drv_stride_from_format(format, width, 0);
  44         stride = ALIGN(stride, 64);
  45         drv_bo_from_format(bo, stride, height, format);
  46
  47         memset(&gem_create, 0, sizeof(gem_create));
  48         gem_create.size = bo->total_size;
  49
  50         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_CREATE, &gem_create);
  51         if (ret) {
  52                 fprintf(stderr, "drv: DRM_IOCTL_MTK_GEM_CREATE failed (size=%llu)\n",
  53                         gem_create.size);
  54                 return ret;
  55         }
  56
  57         for (plane = 0; plane < bo->num_planes; plane++)
  58                 bo->handles[plane].u32 = gem_create.handle;
  59
  60         return 0;
  61 }
  62
  63 static void *mediatek_bo_map(struct bo *bo, struct map_info *data, size_t plane)
  64 {
  65         int ret;
  66         struct drm_mtk_gem_map_off gem_map;
  67
  68         memset(&gem_map, 0, sizeof(gem_map));
  69         gem_map.handle = bo->handles[0].u32;
  70
  71         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_MAP_OFFSET, &gem_map);
  72         if (ret) {
  73                 fprintf(stderr, "drv: DRM_IOCTL_MTK_GEM_MAP_OFFSET failed\n");
  74                 return MAP_FAILED;
  75         }
  76
  77         data->length = bo->total_size;
  78
  79         return mmap(0, bo->total_size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->drv->fd,
  80                     gem_map.offset);
  81 }
  82
  83 static uint32_t mediatek_resolve_format(uint32_t format)
  84 {
  85         switch (format) {
  86         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
  87                 /*HACK: See b/28671744 */
  88                 return DRM_FORMAT_XBGR8888;
  89         case DRM_FORMAT_FLEX_YCbCr_420_888:
  90                 return DRM_FORMAT_YVU420_ANDROID;
  91         default:
  92                 return format;
  93         }
  94 }
  95
  96 struct backend backend_mediatek = {
  97         .name = "mediatek",
  98         .init = mediatek_init,
  99         .bo_create = mediatek_bo_create,
 100         .bo_destroy = drv_gem_bo_destroy,
 101         .bo_import = drv_prime_bo_import,
 102         .bo_map = mediatek_bo_map,
 103         .resolve_format = mediatek_resolve_format,
 104 };
 105
 106 #endif