rockchip.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_ROCKCHIP
   8
   9 #include <errno.h>
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <sys/mman.h>
  13 #include <xf86drm.h>
  14 #include <rockchip_drm.h>
  15
  16 #include "drv_priv.h"
  17 #include "helpers.h"
  18 #include "util.h"
  19
  20 static struct supported_combination combos[11] = {
  21         {DRM_FORMAT_ABGR8888, DRM_FORMAT_MOD_NONE,
  22                 BO_USE_RENDERING | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN |
  23                 BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  24         {DRM_FORMAT_ARGB8888, DRM_FORMAT_MOD_NONE,
  25                 BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN},
  26         {DRM_FORMAT_ARGB8888, DRM_FORMAT_MOD_NONE,
  27                 BO_USE_RENDERING | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  28         {DRM_FORMAT_NV12, DRM_FORMAT_MOD_NONE,
  29                 BO_USE_RENDERING | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  30         {DRM_FORMAT_NV12, DRM_FORMAT_MOD_NONE,
  31                 BO_USE_LINEAR | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN},
  32         {DRM_FORMAT_RGB565, DRM_FORMAT_MOD_NONE,
  33                 BO_USE_RENDERING | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  34         {DRM_FORMAT_XBGR8888, DRM_FORMAT_MOD_NONE,
  35                 BO_USE_RENDERING | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN |
  36                 BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  37         {DRM_FORMAT_XBGR8888, DRM_FORMAT_MOD_NONE,
  38                 BO_USE_LINEAR | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN},
  39         {DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_NONE,
  40                 BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN},
  41         {DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_NONE,
  42                 BO_USE_RENDERING | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  43         {DRM_FORMAT_YVU420, DRM_FORMAT_MOD_NONE,
  44                 BO_USE_RENDERING | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
  45 };
  46
  47 static int afbc_bo_from_format(struct bo *bo, uint32_t width, uint32_t height,
  48                                uint32_t format)
  49 {
  50         /* We've restricted ourselves to four bytes per pixel. */
  51         const uint32_t pixel_size = 4;
  52
  53         const uint32_t clump_width = 4;
  54         const uint32_t clump_height = 4;
  55
  56 #define AFBC_NARROW 1
  57 #if AFBC_NARROW == 1
  58         const uint32_t block_width = 4 * clump_width;
  59         const uint32_t block_height = 4 * clump_height;
  60 #else
  61         const uint32_t block_width = 8 * clump_width;
  62         const uint32_t block_height = 2 * clump_height;
  63 #endif
  64
  65         const uint32_t header_block_size = 16;
  66         const uint32_t body_block_size = block_width * block_height * pixel_size;
  67         const uint32_t width_in_blocks = DIV_ROUND_UP(width, block_width);
  68         const uint32_t height_in_blocks = DIV_ROUND_UP(height, block_height);
  69         const uint32_t total_blocks = width_in_blocks * height_in_blocks;
  70
  71         const uint32_t header_plane_size = total_blocks * header_block_size;
  72         const uint32_t body_plane_size = total_blocks * body_block_size;
  73
  74         /* GPU requires 64 bytes, but EGL import code expects 1024 byte
  75          * alignement for the body plane. */
  76         const uint32_t body_plane_alignment = 1024;
  77
  78         const uint32_t body_plane_offset =
  79                 ALIGN(header_plane_size, body_plane_alignment);
  80         const uint32_t total_size =
  81                 body_plane_offset + body_plane_size;
  82
  83         bo->strides[0] = width_in_blocks * block_width * pixel_size;
  84         bo->sizes[0] = total_size;
  85         bo->offsets[0] = 0;
  86
  87         bo->total_size = total_size;
  88
  89         bo->format_modifiers[0] = DRM_FORMAT_MOD_CHROMEOS_ROCKCHIP_AFBC;
  90
  91         return 0;
  92 }
  93
  94 static int rockchip_init(struct driver *drv)
  95 {
  96         drv_insert_combinations(drv, combos, ARRAY_SIZE(combos));
  97         return drv_add_kms_flags(drv);
  98 }
  99
 100 static bool has_modifier(const uint64_t *list, uint32_t count, uint64_t modifier)
 101 {
 102         uint32_t i;
 103
 104         for (i = 0; i < count; i++)
 105                 if (list[i] == modifier)
 106                         return true;
 107
 108         return false;
 109 }
 110
 111 static int rockchip_bo_create_with_modifiers(struct bo *bo,
 112                                              uint32_t width, uint32_t height,
 113                                              uint32_t format,
 114                                              const uint64_t *modifiers,
 115                                              uint32_t count)
 116 {
 117         int ret;
 118         size_t plane;
 119         struct drm_rockchip_gem_create gem_create;
 120
 121         if (format == DRM_FORMAT_NV12) {
 122                 uint32_t w_mbs = DIV_ROUND_UP(ALIGN(width, 16), 16);
 123                 uint32_t h_mbs = DIV_ROUND_UP(ALIGN(width, 16), 16);
 124
 125                 uint32_t aligned_width = w_mbs * 16;
 126                 uint32_t aligned_height = DIV_ROUND_UP(h_mbs * 16 * 3, 2);
 127
 128                 drv_bo_from_format(bo, aligned_width, height, format);
 129                 bo->total_size = bo->strides[0] * aligned_height
 130                                  + w_mbs * h_mbs * 128;
 131         } else if (has_modifier(modifiers, count,
 132                                 DRM_FORMAT_MOD_CHROMEOS_ROCKCHIP_AFBC)) {
 133                 /* If the caller has decided they can use AFBC, always
 134                  * pick that */
 135                 afbc_bo_from_format(bo, width, height, format);
 136         } else {
 137                 if (!has_modifier(modifiers, count, DRM_FORMAT_MOD_NONE)) {
 138                         errno = EINVAL;
 139                         fprintf(stderr, "no usable modifier found\n");
 140                         return -1;
 141                 }
 142                 drv_bo_from_format(bo, width, height, format);
 143         }
 144
 145         memset(&gem_create, 0, sizeof(gem_create));
 146         gem_create.size = bo->total_size;
 147
 148         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_ROCKCHIP_GEM_CREATE,
 149                        &gem_create);
 150
 151         if (ret) {
 152                 fprintf(stderr, "drv: DRM_IOCTL_ROCKCHIP_GEM_CREATE failed "
 153                                 "(size=%llu)\n", gem_create.size);
 154                 return ret;
 155         }
 156
 157         for (plane = 0; plane < bo->num_planes; plane++)
 158                 bo->handles[plane].u32 = gem_create.handle;
 159
 160         return 0;
 161 }
 162
 163 static int rockchip_bo_create(struct bo *bo, uint32_t width, uint32_t height,
 164                               uint32_t format, uint32_t flags)
 165 {
 166         uint64_t modifiers[] = { DRM_FORMAT_MOD_NONE };
 167
 168         return rockchip_bo_create_with_modifiers(bo, width, height, format,
 169                                                  modifiers, ARRAY_SIZE(modifiers));
 170 }
 171
 172 static void *rockchip_bo_map(struct bo *bo, struct map_info *data, size_t plane)
 173 {
 174         int ret;
 175         struct drm_rockchip_gem_map_off gem_map;
 176
 177         /* We can only map buffers created with SW access flags, which should
 178          * have no modifiers (ie, not AFBC). */
 179         if (bo->format_modifiers[0] == DRM_FORMAT_MOD_CHROMEOS_ROCKCHIP_AFBC)
 180                 return MAP_FAILED;
 181
 182         memset(&gem_map, 0, sizeof(gem_map));
 183         gem_map.handle = bo->handles[0].u32;
 184
 185         ret = drmIoctl(bo->drv->fd, DRM_IOCTL_ROCKCHIP_GEM_MAP_OFFSET,
 186                        &gem_map);
 187         if (ret) {
 188                 fprintf(stderr,
 189                         "drv: DRM_IOCTL_ROCKCHIP_GEM_MAP_OFFSET failed\n");
 190                 return MAP_FAILED;
 191         }
 192
 193         data->length = bo->total_size;
 194
 195         return mmap(0, bo->total_size, PROT_READ | PROT_WRITE, MAP_SHARED,
 196                     bo->drv->fd, gem_map.offset);
 197 }
 198
 199 static uint32_t rockchip_resolve_format(uint32_t format)
 200 {
 201         switch (format) {
 202         case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
 203                 /*HACK: See b/28671744 */
 204                 return DRM_FORMAT_XBGR8888;
 205         case DRM_FORMAT_FLEX_YCbCr_420_888:
 206                 return DRM_FORMAT_NV12;
 207         default:
 208                 return format;
 209         }
 210 }
 211
 212 struct backend backend_rockchip =
 213 {
 214         .name = "rockchip",
 215         .init = rockchip_init,
 216         .bo_create = rockchip_bo_create,
 217         .bo_create_with_modifiers = rockchip_bo_create_with_modifiers,
 218         .bo_destroy = drv_gem_bo_destroy,
 219         .bo_import = drv_prime_bo_import,
 220         .bo_map = rockchip_bo_map,
 221         .resolve_format = rockchip_resolve_format,
 222 };
 223
 224 #endif