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 <errno.h>
  11 #include <fcntl.h>
  12 #include <poll.h>
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <sys/mman.h>
  16 #include <unistd.h>
  17 #include <xf86drm.h>
  18 #include <mediatek_drm.h>
  19 // clang-format on
  20
  21 #include "drv_priv.h"
  22 #include "helpers.h"
  23 #include "util.h"
  24
  25 #define TILE_TYPE_LINEAR 0
  26
  27 struct mediatek_private_map_data {
  28         void *cached_addr;
  29         void *gem_addr;
  30         int prime_fd;
  31 };
  32
  33 static const uint32_t render_target_formats[] = { DRM_FORMAT_ABGR8888, DRM_FORMAT_ARGB8888,
  34                                                   DRM_FORMAT_RGB565, DRM_FORMAT_XBGR8888,
  35                                                   DRM_FORMAT_XRGB8888 };
  36
  37 #ifdef MTK_MT8183
  38 static const uint32_t texture_source_formats[] = { DRM_FORMAT_R8,     DRM_FORMAT_NV21,
  39                                                    DRM_FORMAT_NV12,   DRM_FORMAT_YUYV,
  40                                                    DRM_FORMAT_YVU420, DRM_FORMAT_YVU420_ANDROID };
  41 #else
  42 static const uint32_t texture_source_formats[] = { DRM_FORMAT_R8, DRM_FORMAT_YVU420,
  43                                                    DRM_FORMAT_YVU420_ANDROID, DRM_FORMAT_NV12 };
  44 #endif
  45
  46 static int mediatek_init(struct driver *drv)
  47 {
  48         struct format_metadata metadata;
  49
  50         drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
  51                              &LINEAR_METADATA, BO_USE_RENDER_MASK);
  52
  53         drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats),
  54                              &LINEAR_METADATA, BO_USE_TEXTURE_MASK);
  55
  56         /*
  57          * Chrome uses DMA-buf mmap to write to YV12 buffers, which are then accessed by the
  58          * Video Encoder Accelerator (VEA). It could also support NV12 potentially in the future.
  59          */
  60         drv_modify_combination(drv, DRM_FORMAT_YVU420, &LINEAR_METADATA, BO_USE_HW_VIDEO_ENCODER);
  61         drv_modify_combination(drv, DRM_FORMAT_NV12, &LINEAR_METADATA, BO_USE_HW_VIDEO_ENCODER);
  62
  63         /* Android CTS tests require this. */
  64         drv_add_combination(drv, DRM_FORMAT_BGR888, &LINEAR_METADATA, BO_USE_SW_MASK);
  65
  66         /* Support BO_USE_HW_VIDEO_DECODER for protected content minigbm allocations. */
  67         metadata.tiling = TILE_TYPE_LINEAR;
  68         metadata.priority = 1;
  69         metadata.modifier = DRM_FORMAT_MOD_LINEAR;
  70         drv_modify_combination(drv, DRM_FORMAT_YVU420, &metadata, BO_USE_HW_VIDEO_DECODER);
  71         drv_modify_combination(drv, DRM_FORMAT_YVU420_ANDROID, &metadata, BO_USE_HW_VIDEO_DECODER);
  72         drv_modify_combination(drv, DRM_FORMAT_NV12, &metadata, BO_USE_HW_VIDEO_DECODER);
  73
  74 #ifdef MTK_MT8183
  75         /* Only for MT8183 Camera subsystem */
  76         drv_modify_combination(drv, DRM_FORMAT_NV12, &metadata,
  77                                BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE);
  78         drv_modify_combination(drv, DRM_FORMAT_NV21, &metadata,
  79                                BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE);
  80         drv_modify_combination(drv, DRM_FORMAT_YUYV, &metadata,
  81                                BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE);
  82         drv_modify_combination(drv, DRM_FORMAT_YVU420, &metadata,
  83                                BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE);
  84         drv_modify_combination(drv, DRM_FORMAT_R8, &metadata,
  85                                BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE);
  86 #endif
  87
  88         return drv_modify_linear_combinations(drv);
  89 }
  90
  91 static int mediatek_bo_create_with_modifiers(struct bo *bo, uint32_t width, uint32_t height,
  92                                              uint32_t format, const uint64_t *modifiers,
  93                                              uint32_t count)
  94 {
  95         int ret;
  96         size_t plane;
  97         uint32_t stride;
  98         struct drm_mtk_gem_create gem_create;
  99
 100         if (!drv_has_modifier(modifiers, count, DRM_FORMAT_MOD_LINEAR)) {
 101                 errno = EINVAL;
 102                 drv_log("no usable modifier found\n");
 103                 return -EINVAL;
 104         }
 105
 106         /*
 107          * Since the ARM L1 cache line size is 64 bytes, align to that as a
 108          * performance optimization.
 109          */
 110         stride = drv_stride_from_format(format, width, 0);
 111         stride = ALIGN(stride, 64);
 112         drv_bo_from_format(bo, stride, height, format);
 113
 114         memset(&gem_create, 0, sizeof(gem_create));
 115         gem_create.size = bo->total_size;
 116
 117         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_CREATE, &gem_create);
 118         if (ret) {
 119                 drv_log("DRM_IOCTL_MTK_GEM_CREATE failed (size=%llu)\n", gem_create.size);
 120                 return -errno;
 121         }
 122
 123         for (plane = 0; plane < bo->num_planes; plane++)
 124                 bo->handles[plane].u32 = gem_create.handle;
 125
 126         return 0;
 127 }
 128
 129 static int mediatek_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
 130                               uint64_t use_flags)
 131 {
 132         uint64_t modifiers[] = { DRM_FORMAT_MOD_LINEAR };
 133         return mediatek_bo_create_with_modifiers(bo, width, height, format, modifiers,
 134                                                  ARRAY_SIZE(modifiers));
 135 }
 136
 137 static void *mediatek_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
 138 {
 139         int ret, prime_fd;
 140         struct drm_mtk_gem_map_off gem_map;
 141         struct mediatek_private_map_data *priv;
 142
 143         memset(&gem_map, 0, sizeof(gem_map));
 144         gem_map.handle = bo->handles[0].u32;
 145
 146         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_MAP_OFFSET, &gem_map);
 147         if (ret) {
 148                 drv_log("DRM_IOCTL_MTK_GEM_MAP_OFFSET failed\n");
 149                 return MAP_FAILED;
 150         }
 151
 152         ret = drmPrimeHandleToFD(bo->drv->fd, gem_map.handle, DRM_CLOEXEC, &prime_fd);
 153         if (ret) {
 154                 drv_log("Failed to get a prime fd\n");
 155                 return MAP_FAILED;
 156         }
 157
 158         void *addr = mmap(0, bo->total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
 159                           gem_map.offset);
 160
 161         vma->length = bo->total_size;
 162
 163         priv = calloc(1, sizeof(*priv));
 164         priv->prime_fd = prime_fd;
 165         vma->priv = priv;
 166
 167         if (bo->use_flags & BO_USE_RENDERSCRIPT) {
 168                 priv->cached_addr = calloc(1, bo->total_size);
 169                 priv->gem_addr = addr;
 170                 addr = priv->cached_addr;
 171         }
 172
 173         return addr;
 174 }
 175
 176 static int mediatek_bo_unmap(struct bo *bo, struct vma *vma)
 177 {
 178         if (vma->priv) {
 179                 struct mediatek_private_map_data *priv = vma->priv;
 180
 181                 if (priv->cached_addr) {
 182                         vma->addr = priv->gem_addr;
 183                         free(priv->cached_addr);
 184                 }
 185
 186                 close(priv->prime_fd);
 187                 free(priv);
 188                 vma->priv = NULL;
 189         }
 190
 191         return munmap(vma->addr, vma->length);
 192 }
 193
 194 static int mediatek_bo_invalidate(struct bo *bo, struct mapping *mapping)
 195 {
 196         struct mediatek_private_map_data *priv = mapping->vma->priv;
 197
 198         if (priv) {
 199                 struct pollfd fds = {
 200                         .fd = priv->prime_fd,
 201                 };
 202
 203                 if (mapping->vma->map_flags & BO_MAP_WRITE)
 204                         fds.events |= POLLOUT;
 205
 206                 if (mapping->vma->map_flags & BO_MAP_READ)
 207                         fds.events |= POLLIN;
 208
 209                 poll(&fds, 1, -1);
 210                 if (fds.revents != fds.events)
 211                         drv_log("poll prime_fd failed\n");
 212
 213                 if (priv->cached_addr)
 214                         memcpy(priv->cached_addr, priv->gem_addr, bo->total_size);
 215         }
 216
 217         return 0;
 218 }
 219
 220 static int mediatek_bo_flush(struct bo *bo, struct mapping *mapping)
 221 {
 222         struct mediatek_private_map_data *priv = mapping->vma->priv;
 223         if (priv && priv->cached_addr && (mapping->vma->map_flags & BO_MAP_WRITE))
 224                 memcpy(priv->gem_addr, priv->cached_addr, bo->total_size);
 225
 226         return 0;
 227 }
 228
 229 static uint32_t mediatek_resolve_format(struct driver *drv, uint32_t format, uint64_t use_flags)
 230 {
 231         switch (format) {
 232         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
 233 #ifdef MTK_MT8183
 234                 /* Only for MT8183 Camera subsystem requires NV12. */
 235                 if (use_flags & (BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE))
 236                         return DRM_FORMAT_NV12;
 237 #endif
 238                 /*HACK: See b/28671744 */
 239                 return DRM_FORMAT_XBGR8888;
 240         case DRM_FORMAT_FLEX_YCbCr_420_888:
 241 #ifdef MTK_MT8183
 242                 /* Only for MT8183 Camera subsystem requires NV12 */
 243                 if (use_flags & (BO_USE_CAMERA_READ | BO_USE_CAMERA_WRITE))
 244                         return DRM_FORMAT_NV12;
 245 #endif
 246                 return DRM_FORMAT_YVU420;
 247         default:
 248                 return format;
 249         }
 250 }
 251
 252 const struct backend backend_mediatek = {
 253         .name = "mediatek",
 254         .init = mediatek_init,
 255         .bo_create = mediatek_bo_create,
 256         .bo_create_with_modifiers = mediatek_bo_create_with_modifiers,
 257         .bo_destroy = drv_gem_bo_destroy,
 258         .bo_import = drv_prime_bo_import,
 259         .bo_map = mediatek_bo_map,
 260         .bo_unmap = mediatek_bo_unmap,
 261         .bo_invalidate = mediatek_bo_invalidate,
 262         .bo_flush = mediatek_bo_flush,
 263         .resolve_format = mediatek_resolve_format,
 264 };
 265
 266 #endif