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 struct supported_combination combos[3] = {
  21         {DRM_FORMAT_ARGB8888, DRM_FORMAT_MOD_NONE,
  22                 BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_RENDERING | BO_USE_SW_READ_OFTEN |
  23                 BO_USE_SW_WRITE_OFTEN | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  24         {DRM_FORMAT_NV12, DRM_FORMAT_MOD_NONE,
  25                 BO_USE_LINEAR | BO_USE_RENDERING | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN |
  26                 BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  27         {DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_NONE,
  28                 BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_RENDERING | BO_USE_SW_READ_OFTEN |
  29                 BO_USE_SW_WRITE_OFTEN | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  30 };
  31
  32 static int exynos_init(struct driver *drv)
  33 {
  34         drv_insert_combinations(drv, combos, ARRAY_SIZE(combos));
  35         return drv_add_kms_flags(drv);
  36 }
  37
  38 static int exynos_bo_create(struct bo *bo, uint32_t width, uint32_t height,
  39                             uint32_t format, uint32_t flags)
  40 {
  41         size_t plane;
  42
  43         if (format == DRM_FORMAT_NV12) {
  44                 uint32_t chroma_height;
  45                 /* V4L2 s5p-mfc requires width to be 16 byte aligned and height 32. */
  46                 width = ALIGN(width, 16);
  47                 height = ALIGN(height, 32);
  48                 chroma_height = ALIGN(height / 2, 32);
  49                 bo->strides[0] = bo->strides[1] = width;
  50                 /* MFC v8+ requires 64 byte padding in the end of luma and chroma buffers. */
  51                 bo->sizes[0] = bo->strides[0] * height + 64;
  52                 bo->sizes[1] = bo->strides[1] * chroma_height + 64;
  53                 bo->offsets[0] = bo->offsets[1] = 0;
  54                 bo->total_size = bo->sizes[0] + bo->sizes[1];
  55         } else if (format == DRM_FORMAT_XRGB8888 || format == DRM_FORMAT_ARGB8888) {
  56                 bo->strides[0] = drv_stride_from_format(format, width, 0);
  57                 bo->total_size = bo->sizes[0] = height * bo->strides[0];
  58                 bo->offsets[0] = 0;
  59         } else {
  60                 fprintf(stderr, "drv: unsupported format %X\n", format);
  61                 assert(0);
  62                 return -EINVAL;
  63         }
  64
  65         int ret;
  66         for (plane = 0; plane < bo->num_planes; plane++) {
  67                 size_t size = bo->sizes[plane];
  68                 struct drm_exynos_gem_create gem_create;
  69
  70                 memset(&gem_create, 0, sizeof(gem_create));
  71                 gem_create.size = size;
  72                 gem_create.flags = EXYNOS_BO_NONCONTIG;
  73
  74                 ret = drmIoctl(bo->drv->fd, DRM_IOCTL_EXYNOS_GEM_CREATE, &gem_create);
  75                 if (ret) {
  76                         fprintf(stderr, "drv: DRM_IOCTL_EXYNOS_GEM_CREATE failed "
  77                                         "(size=%zu)\n", size);
  78                         goto cleanup_planes;
  79                 }
  80
  81                 bo->handles[plane].u32 = gem_create.handle;
  82         }
  83
  84         return 0;
  85
  86 cleanup_planes:
  87         for ( ; plane != 0; plane--) {
  88                 struct drm_gem_close gem_close;
  89                 memset(&gem_close, 0, sizeof(gem_close));
  90                 gem_close.handle = bo->handles[plane - 1].u32;
  91                 int gem_close_ret = drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE,
  92                                              &gem_close);
  93                 if (gem_close_ret) {
  94                         fprintf(stderr,
  95                                 "drv: DRM_IOCTL_GEM_CLOSE failed: %d\n",
  96                                 gem_close_ret);
  97                 }
  98         }
  99
 100         return ret;
 101 }
 102
 103 /*
 104  * Use dumb mapping with exynos even though a GEM buffer is created.
 105  * libdrm does the same thing in exynos_drm.c
 106  */
 107 struct backend backend_exynos =
 108 {
 109         .name = "exynos",
 110         .init = exynos_init,
 111         .bo_create = exynos_bo_create,
 112         .bo_destroy = drv_gem_bo_destroy,
 113         .bo_map = drv_dumb_bo_map,
 114 };
 115
 116 #endif