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 render_target_formats[] = { DRM_FORMAT_ABGR8888, DRM_FORMAT_ARGB8888,
  22                                                   DRM_FORMAT_RGB565, DRM_FORMAT_XBGR8888,
  23                                                   DRM_FORMAT_XRGB8888 };
  24
  25 static const uint32_t texture_source_formats[] = { DRM_FORMAT_R8, DRM_FORMAT_YVU420,
  26                                                    DRM_FORMAT_YVU420_ANDROID };
  27
  28 static int mediatek_init(struct driver *drv)
  29 {
  30         int ret;
  31         ret = drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
  32                                    &LINEAR_METADATA, BO_USE_RENDER_MASK);
  33         if (ret)
  34                 return ret;
  35
  36         ret = drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats),
  37                                    &LINEAR_METADATA, BO_USE_TEXTURE_MASK);
  38         if (ret)
  39                 return ret;
  40
  41         return drv_modify_linear_combinations(drv);
  42 }
  43
  44 static int mediatek_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
  45                               uint32_t flags)
  46 {
  47         int ret;
  48         size_t plane;
  49         uint32_t stride;
  50         struct drm_mtk_gem_create gem_create;
  51
  52         /*
  53          * Since the ARM L1 cache line size is 64 bytes, align to that as a
  54          * performance optimization.
  55          */
  56         stride = drv_stride_from_format(format, width, 0);
  57         stride = ALIGN(stride, 64);
  58         drv_bo_from_format(bo, stride, height, format);
  59
  60         memset(&gem_create, 0, sizeof(gem_create));
  61         gem_create.size = bo->total_size;
  62
  63         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_CREATE, &gem_create);
  64         if (ret) {
  65                 fprintf(stderr, "drv: DRM_IOCTL_MTK_GEM_CREATE failed (size=%llu)\n",
  66                         gem_create.size);
  67                 return ret;
  68         }
  69
  70         for (plane = 0; plane < bo->num_planes; plane++)
  71                 bo->handles[plane].u32 = gem_create.handle;
  72
  73         return 0;
  74 }
  75
  76 static void *mediatek_bo_map(struct bo *bo, struct map_info *data, size_t plane)
  77 {
  78         int ret;
  79         struct drm_mtk_gem_map_off gem_map;
  80
  81         memset(&gem_map, 0, sizeof(gem_map));
  82         gem_map.handle = bo->handles[0].u32;
  83
  84         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_MAP_OFFSET, &gem_map);
  85         if (ret) {
  86                 fprintf(stderr, "drv: DRM_IOCTL_MTK_GEM_MAP_OFFSET failed\n");
  87                 return MAP_FAILED;
  88         }
  89
  90         data->length = bo->total_size;
  91
  92         return mmap(0, bo->total_size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->drv->fd,
  93                     gem_map.offset);
  94 }
  95
  96 static uint32_t mediatek_resolve_format(uint32_t format)
  97 {
  98         switch (format) {
  99         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
 100                 /*HACK: See b/28671744 */
 101                 return DRM_FORMAT_XBGR8888;
 102         case DRM_FORMAT_FLEX_YCbCr_420_888:
 103                 return DRM_FORMAT_YVU420;
 104         default:
 105                 return format;
 106         }
 107 }
 108
 109 struct backend backend_mediatek = {
 110         .name = "mediatek",
 111         .init = mediatek_init,
 112         .bo_create = mediatek_bo_create,
 113         .bo_destroy = drv_gem_bo_destroy,
 114         .bo_import = drv_prime_bo_import,
 115         .bo_map = mediatek_bo_map,
 116         .resolve_format = mediatek_resolve_format,
 117 };
 118
 119 #endif