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 struct supported_combination combos[8] = {
  20         {DRM_FORMAT_ABGR8888, DRM_FORMAT_MOD_NONE,
  21                 BO_USE_RENDERING | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN |
  22                 BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  23         {DRM_FORMAT_ARGB8888, DRM_FORMAT_MOD_NONE,
  24                 BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN},
  25         {DRM_FORMAT_ARGB8888, DRM_FORMAT_MOD_NONE,
  26                 BO_USE_RENDERING | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  27         {DRM_FORMAT_RGB565, DRM_FORMAT_MOD_NONE,
  28                 BO_USE_RENDERING | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  29         {DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_NONE,
  30                 BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN},
  31         {DRM_FORMAT_XBGR8888, DRM_FORMAT_MOD_NONE,
  32                 BO_USE_RENDERING | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN |
  33                 BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  34         {DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_NONE,
  35                 BO_USE_RENDERING | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  36         {DRM_FORMAT_YVU420, DRM_FORMAT_MOD_NONE,
  37                 BO_USE_RENDERING | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN |
  38                 BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  39 };
  40
  41 static int mediatek_init(struct driver *drv)
  42 {
  43         drv_insert_combinations(drv, combos, ARRAY_SIZE(combos));
  44         return drv_add_kms_flags(drv);
  45 }
  46
  47 static int mediatek_bo_create(struct bo *bo, uint32_t width, uint32_t height,
  48                               uint32_t format, uint32_t flags)
  49 {
  50         int ret;
  51         size_t plane;
  52         struct drm_mtk_gem_create gem_create;
  53
  54         drv_bo_from_format(bo, width, height, format);
  55
  56         memset(&gem_create, 0, sizeof(gem_create));
  57         gem_create.size = bo->total_size;
  58
  59         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_CREATE, &gem_create);
  60         if (ret) {
  61                 fprintf(stderr, "drv: DRM_IOCTL_MTK_GEM_CREATE failed "
  62                                 "(size=%llu)\n", gem_create.size);
  63                 return ret;
  64         }
  65
  66         for (plane = 0; plane < bo->num_planes; plane++)
  67                 bo->handles[plane].u32 = gem_create.handle;
  68
  69         return 0;
  70 }
  71
  72 static void *mediatek_bo_map(struct bo *bo, struct map_info *data, size_t plane)
  73 {
  74         int ret;
  75         struct drm_mtk_gem_map_off gem_map;
  76
  77         memset(&gem_map, 0, sizeof(gem_map));
  78         gem_map.handle = bo->handles[0].u32;
  79
  80         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MTK_GEM_MAP_OFFSET, &gem_map);
  81         if (ret) {
  82                 fprintf(stderr,"drv: DRM_IOCTL_MTK_GEM_MAP_OFFSET failed\n");
  83                 return MAP_FAILED;
  84         }
  85
  86         data->length = bo->total_size;
  87
  88         return mmap(0, bo->total_size, PROT_READ | PROT_WRITE, MAP_SHARED,
  89                     bo->drv->fd, gem_map.offset);
  90 }
  91
  92 static uint32_t mediatek_resolve_format(uint32_t format)
  93 {
  94         switch (format) {
  95         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
  96                 /*HACK: See b/28671744 */
  97                 return DRM_FORMAT_XBGR8888;
  98         case DRM_FORMAT_FLEX_YCbCr_420_888:
  99                 return DRM_FORMAT_YVU420;
 100         default:
 101                 return format;
 102         }
 103 }
 104
 105 struct backend backend_mediatek =
 106 {
 107         .name = "mediatek",
 108         .init = mediatek_init,
 109         .bo_create = mediatek_bo_create,
 110         .bo_destroy = drv_gem_bo_destroy,
 111         .bo_map = mediatek_bo_map,
 112         .resolve_format = mediatek_resolve_format,
 113 };
 114
 115 #endif