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 struct mediatek_private_map_data {
  22         void *cached_addr;
  23         void *gem_addr;
  24 };
  25
  26 static const uint32_t render_target_formats[] = { DRM_FORMAT_ABGR8888, DRM_FORMAT_ARGB8888,
  27                                                   DRM_FORMAT_RGB565, DRM_FORMAT_XBGR8888,
  28                                                   DRM_FORMAT_XRGB8888 };
  29
  30 static const uint32_t texture_source_formats[] = { DRM_FORMAT_R8, DRM_FORMAT_YVU420,
  31                                                    DRM_FORMAT_YVU420_ANDROID };
  32
  33 static int mediatek_init(struct driver *drv)
  34 {
  35         int ret;
  36         ret = drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
  37                                    &LINEAR_METADATA, BO_USE_RENDER_MASK);
  38         if (ret)
  39                 return ret;
  40
  41         ret = drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats),
  42                                    &LINEAR_METADATA, BO_USE_TEXTURE_MASK);
  43         if (ret)
  44                 return ret;
  45
  46         return drv_modify_linear_combinations(drv);
  47 }
  48
  49 static int mediatek_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
  50                               uint64_t use_flags)
  51 {
  52         int ret;
  53         size_t plane;
  54         uint32_t stride;
  55         struct drm_mtk_gem_create gem_create;
  56
  57         /*
  58          * Since the ARM L1 cache line size is 64 bytes, align to that as a
  59          * performance optimization.
  60          */
  61         stride = drv_stride_from_format(format, width, 0);
  62         stride = ALIGN(stride, 64);
  63         drv_bo_from_format(bo, stride, height, format);
  64
  65         memset(&gem_create, 0, sizeof(gem_create));
  66         gem_create.size = bo->total_size;
  67
  68         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_CREATE, &gem_create);
  69         if (ret) {
  70                 fprintf(stderr, "drv: DRM_IOCTL_MTK_GEM_CREATE failed (size=%llu)\n",
  71                         gem_create.size);
  72                 return ret;
  73         }
  74
  75         for (plane = 0; plane < bo->num_planes; plane++)
  76                 bo->handles[plane].u32 = gem_create.handle;
  77
  78         return 0;
  79 }
  80
  81 static void *mediatek_bo_map(struct bo *bo, struct map_info *data, size_t plane, uint32_t map_flags)
  82 {
  83         int ret;
  84         struct drm_mtk_gem_map_off gem_map;
  85         struct mediatek_private_map_data *priv;
  86
  87         memset(&gem_map, 0, sizeof(gem_map));
  88         gem_map.handle = bo->handles[0].u32;
  89
  90         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_MAP_OFFSET, &gem_map);
  91         if (ret) {
  92                 fprintf(stderr, "drv: DRM_IOCTL_MTK_GEM_MAP_OFFSET failed\n");
  93                 return MAP_FAILED;
  94         }
  95
  96         void *addr = mmap(0, bo->total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
  97                           gem_map.offset);
  98
  99         data->length = bo->total_size;
 100
 101         if (bo->use_flags & BO_USE_RENDERSCRIPT) {
 102                 priv = calloc(1, sizeof(*priv));
 103                 priv->cached_addr = calloc(1, bo->total_size);
 104                 priv->gem_addr = addr;
 105                 memcpy(priv->cached_addr, priv->gem_addr, bo->total_size);
 106                 data->priv = priv;
 107                 addr = priv->cached_addr;
 108         }
 109
 110         return addr;
 111 }
 112
 113 static int mediatek_bo_unmap(struct bo *bo, struct map_info *data)
 114 {
 115         if (data->priv) {
 116                 struct mediatek_private_map_data *priv = data->priv;
 117                 data->addr = priv->gem_addr;
 118                 free(priv->cached_addr);
 119                 free(priv);
 120                 data->priv = NULL;
 121         }
 122
 123         return munmap(data->addr, data->length);
 124 }
 125
 126 static int mediatek_bo_flush(struct bo *bo, struct map_info *data)
 127 {
 128         struct mediatek_private_map_data *priv = data->priv;
 129         if (priv && (data->map_flags & BO_MAP_WRITE))
 130                 memcpy(priv->gem_addr, priv->cached_addr, bo->total_size);
 131
 132         return 0;
 133 }
 134
 135 static uint32_t mediatek_resolve_format(uint32_t format, uint64_t use_flags)
 136 {
 137         switch (format) {
 138         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
 139                 /*HACK: See b/28671744 */
 140                 return DRM_FORMAT_XBGR8888;
 141         case DRM_FORMAT_FLEX_YCbCr_420_888:
 142                 return DRM_FORMAT_YVU420;
 143         default:
 144                 return format;
 145         }
 146 }
 147
 148 struct backend backend_mediatek = {
 149         .name = "mediatek",
 150         .init = mediatek_init,
 151         .bo_create = mediatek_bo_create,
 152         .bo_destroy = drv_gem_bo_destroy,
 153         .bo_import = drv_prime_bo_import,
 154         .bo_map = mediatek_bo_map,
 155         .bo_unmap = mediatek_bo_unmap,
 156         .bo_flush = mediatek_bo_flush,
 157         .resolve_format = mediatek_resolve_format,
 158 };
 159
 160 #endif