exynos.c

   1 /*
   2  * Copyright 2014 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_EXYNOS
   8
   9 #include <assert.h>
  10 #include <errno.h>
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include <xf86drm.h>
  14 #include <exynos_drm.h>
  15
  16 #include "drv_priv.h"
  17 #include "helpers.h"
  18 #include "util.h"
  19
  20 static const uint32_t supported_formats[] = {
  21         DRM_FORMAT_ARGB8888, DRM_FORMAT_NV12, DRM_FORMAT_XRGB8888
  22 };
  23
  24 static int exynos_init(struct driver *drv)
  25 {
  26         return drv_add_linear_combinations(drv, supported_formats,
  27                                            ARRAY_SIZE(supported_formats));
  28 }
  29
  30 static int exynos_bo_create(struct bo *bo, uint32_t width, uint32_t height,
  31                             uint32_t format, uint32_t flags)
  32 {
  33         size_t plane;
  34
  35         if (format == DRM_FORMAT_NV12) {
  36                 uint32_t chroma_height;
  37                 /* V4L2 s5p-mfc requires width to be 16 byte aligned and height 32. */
  38                 width = ALIGN(width, 16);
  39                 height = ALIGN(height, 32);
  40                 chroma_height = ALIGN(height / 2, 32);
  41                 bo->strides[0] = bo->strides[1] = width;
  42                 /* MFC v8+ requires 64 byte padding in the end of luma and chroma buffers. */
  43                 bo->sizes[0] = bo->strides[0] * height + 64;
  44                 bo->sizes[1] = bo->strides[1] * chroma_height + 64;
  45                 bo->offsets[0] = bo->offsets[1] = 0;
  46                 bo->total_size = bo->sizes[0] + bo->sizes[1];
  47         } else if (format == DRM_FORMAT_XRGB8888 || format == DRM_FORMAT_ARGB8888) {
  48                 bo->strides[0] = drv_stride_from_format(format, width, 0);
  49                 bo->total_size = bo->sizes[0] = height * bo->strides[0];
  50                 bo->offsets[0] = 0;
  51         } else {
  52                 fprintf(stderr, "drv: unsupported format %X\n", format);
  53                 assert(0);
  54                 return -EINVAL;
  55         }
  56
  57         int ret;
  58         for (plane = 0; plane < bo->num_planes; plane++) {
  59                 size_t size = bo->sizes[plane];
  60                 struct drm_exynos_gem_create gem_create;
  61
  62                 memset(&gem_create, 0, sizeof(gem_create));
  63                 gem_create.size = size;
  64                 gem_create.flags = EXYNOS_BO_NONCONTIG;
  65
  66                 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_EXYNOS_GEM_CREATE, &gem_create);
  67                 if (ret) {
  68                         fprintf(stderr, "drv: DRM_IOCTL_EXYNOS_GEM_CREATE failed "
  69                                         "(size=%zu)\n", size);
  70                         goto cleanup_planes;
  71                 }
  72
  73                 bo->handles[plane].u32 = gem_create.handle;
  74         }
  75
  76         return 0;
  77
  78 cleanup_planes:
  79         for ( ; plane != 0; plane--) {
  80                 struct drm_gem_close gem_close;
  81                 memset(&gem_close, 0, sizeof(gem_close));
  82                 gem_close.handle = bo->handles[plane - 1].u32;
  83                 int gem_close_ret = drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE,
  84                                              &gem_close);
  85                 if (gem_close_ret) {
  86                         fprintf(stderr,
  87                                 "drv: DRM_IOCTL_GEM_CLOSE failed: %d\n",
  88                                 gem_close_ret);
  89                 }
  90         }
  91
  92         return ret;
  93 }
  94
  95 /*
  96  * Use dumb mapping with exynos even though a GEM buffer is created.
  97  * libdrm does the same thing in exynos_drm.c
  98  */
  99 struct backend backend_exynos =
 100 {
 101         .name = "exynos",
 102         .init = exynos_init,
 103         .bo_create = exynos_bo_create,
 104         .bo_destroy = drv_gem_bo_destroy,
 105         .bo_import = drv_prime_bo_import,
 106         .bo_map = drv_dumb_bo_map,
 107 };
 108
 109 #endif