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