blob: 820e4fe9f94fe643cda5fdee7d46d18614755ba9 [file] [log] [blame]
* Copyright 2017 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifdef DRV_VC4
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <vc4_drm.h>
#include <xf86drm.h>
#include "drv_helpers.h"
#include "drv_priv.h"
#include "util.h"
static const uint32_t render_target_formats[] = { DRM_FORMAT_ARGB8888, DRM_FORMAT_RGB565,
static const uint32_t texture_only_formats[] = { DRM_FORMAT_NV12, DRM_FORMAT_YVU420 };
static int vc4_init(struct driver *drv)
drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
drv_add_combinations(drv, texture_only_formats, ARRAY_SIZE(texture_only_formats),
* Chrome uses DMA-buf mmap to write to YV12 buffers, which are then accessed by the
* Video Encoder Accelerator (VEA). It could also support NV12 potentially in the future.
drv_modify_combination(drv, DRM_FORMAT_YVU420, &LINEAR_METADATA, BO_USE_HW_VIDEO_ENCODER);
drv_modify_combination(drv, DRM_FORMAT_NV12, &LINEAR_METADATA,
return drv_modify_linear_combinations(drv);
static int vc4_bo_create_for_modifier(struct bo *bo, uint32_t width, uint32_t height,
uint32_t format, uint64_t modifier)
int ret;
size_t plane;
uint32_t stride;
struct drm_vc4_create_bo bo_create = { 0 };
switch (modifier) {
drv_log("DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED not supported yet\n");
return -EINVAL;
return -EINVAL;
* Since the ARM L1 cache line size is 64 bytes, align to that as a
* performance optimization.
stride = drv_stride_from_format(format, width, 0);
stride = ALIGN(stride, 64);
drv_bo_from_format(bo, stride, height, format);
bo_create.size = bo->meta.total_size;
ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VC4_CREATE_BO, &bo_create);
if (ret) {
drv_log("DRM_IOCTL_VC4_CREATE_BO failed (size=%zu)\n", bo->meta.total_size);
return -errno;
for (plane = 0; plane < bo->meta.num_planes; plane++)
bo->handles[plane].u32 = bo_create.handle;
return 0;
static int vc4_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
uint64_t use_flags)
struct combination *combo;
combo = drv_get_combination(bo->drv, format, use_flags);
if (!combo)
return -EINVAL;
return vc4_bo_create_for_modifier(bo, width, height, format, combo->metadata.modifier);
static int vc4_bo_create_with_modifiers(struct bo *bo, uint32_t width, uint32_t height,
uint32_t format, const uint64_t *modifiers, uint32_t count)
static const uint64_t modifier_order[] = {
uint64_t modifier;
modifier = drv_pick_modifier(modifiers, count, modifier_order, ARRAY_SIZE(modifier_order));
return vc4_bo_create_for_modifier(bo, width, height, format, modifier);
static void *vc4_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
int ret;
struct drm_vc4_mmap_bo bo_map = { 0 };
bo_map.handle = bo->handles[0].u32;
ret = drmCommandWriteRead(bo->drv->fd, DRM_VC4_MMAP_BO, &bo_map, sizeof(bo_map));
if (ret) {
drv_log("DRM_VC4_MMAP_BO failed\n");
return MAP_FAILED;
vma->length = bo->meta.total_size;
return mmap(NULL, bo->meta.total_size, drv_get_prot(map_flags), MAP_SHARED, bo->drv->fd,
const struct backend backend_vc4 = {
.name = "vc4",
.init = vc4_init,
.bo_create = vc4_bo_create,
.bo_create_with_modifiers = vc4_bo_create_with_modifiers,
.bo_import = drv_prime_bo_import,
.bo_destroy = drv_gem_bo_destroy,
.bo_map = vc4_bo_map,
.bo_unmap = drv_bo_munmap,
.resolve_format_and_use_flags = drv_resolve_format_and_use_flags_helper,