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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <unistd.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <drm_mode.h>
#include "common/common.h"
#include "common/msg.h"
#include "drm_common.h"
#include "drm_prime.h"
int drm_prime_create_framebuffer(struct mp_log *log, int fd,
AVDRMFrameDescriptor *descriptor, int width,
int height, struct drm_prime_framebuffer *framebuffer,
struct drm_prime_handle_refs *handle_refs)
{
AVDRMLayerDescriptor *layer = NULL;
uint32_t pitches[4] = { 0 };
uint32_t offsets[4] = { 0 };
uint32_t handles[4] = { 0 };
uint64_t modifiers[4] = { 0 };
int ret, layer_fd;
if (descriptor && descriptor->nb_layers) {
*framebuffer = (struct drm_prime_framebuffer){0};
for (int object = 0; object < descriptor->nb_objects; object++) {
ret = drmPrimeFDToHandle(fd, descriptor->objects[object].fd,
&framebuffer->gem_handles[object]);
if (ret < 0) {
mp_err(log, "Failed to retrieve the Prime Handle from handle %d (%d).\n",
object, descriptor->objects[object].fd);
goto fail;
}
modifiers[object] = descriptor->objects[object].format_modifier;
}
layer = &descriptor->layers[0];
for (int plane = 0; plane < AV_DRM_MAX_PLANES; plane++) {
layer_fd = framebuffer->gem_handles[layer->planes[plane].object_index];
if (layer_fd && layer->planes[plane].pitch) {
pitches[plane] = layer->planes[plane].pitch;
offsets[plane] = layer->planes[plane].offset;
handles[plane] = layer_fd;
} else {
pitches[plane] = 0;
offsets[plane] = 0;
handles[plane] = 0;
modifiers[plane] = 0;
}
}
ret = drmModeAddFB2WithModifiers(fd, width, height, layer->format,
handles, pitches, offsets,
modifiers, &framebuffer->fb_id,
DRM_MODE_FB_MODIFIERS);
if (ret < 0) {
ret = drmModeAddFB2(fd, width, height, layer->format,
handles, pitches, offsets,
&framebuffer->fb_id, 0);
if (ret < 0) {
mp_err(log, "Failed to create framebuffer with drmModeAddFB2 on layer %d: %s\n",
0, mp_strerror(errno));
goto fail;
}
}
for (int plane = 0; plane < AV_DRM_MAX_PLANES; plane++) {
drm_prime_add_handle_ref(handle_refs, framebuffer->gem_handles[plane]);
}
}
return 0;
fail:
memset(framebuffer, 0, sizeof(*framebuffer));
return -1;
}
void drm_prime_destroy_framebuffer(struct mp_log *log, int fd,
struct drm_prime_framebuffer *framebuffer,
struct drm_prime_handle_refs *handle_refs)
{
if (framebuffer->fb_id)
drmModeRmFB(fd, framebuffer->fb_id);
for (int i = 0; i < AV_DRM_MAX_PLANES; i++) {
if (framebuffer->gem_handles[i]) {
drm_prime_remove_handle_ref(handle_refs,
framebuffer->gem_handles[i]);
if (!drm_prime_get_handle_ref_count(handle_refs,
framebuffer->gem_handles[i])) {
drmIoctl(fd, DRM_IOCTL_GEM_CLOSE, &framebuffer->gem_handles[i]);
}
}
}
memset(framebuffer, 0, sizeof(*framebuffer));
}
void drm_prime_init_handle_ref_count(void *talloc_parent,
struct drm_prime_handle_refs *handle_refs)
{
handle_refs->handle_ref_count = talloc_zero(talloc_parent, uint32_t);
handle_refs->size = 1;
handle_refs->ctx = talloc_parent;
}
void drm_prime_add_handle_ref(struct drm_prime_handle_refs *handle_refs,
uint32_t handle)
{
if (handle) {
if (handle > handle_refs->size) {
handle_refs->size = handle;
MP_TARRAY_GROW(handle_refs->ctx, handle_refs->handle_ref_count,
handle_refs->size);
}
handle_refs->handle_ref_count[handle - 1]++;
}
}
void drm_prime_remove_handle_ref(struct drm_prime_handle_refs *handle_refs,
uint32_t handle)
{
if (handle) {
if (handle <= handle_refs->size &&
handle_refs->handle_ref_count[handle - 1])
{
handle_refs->handle_ref_count[handle - 1]--;
}
}
}
uint32_t drm_prime_get_handle_ref_count(struct drm_prime_handle_refs *handle_refs,
uint32_t handle)
{
if (handle) {
if (handle <= handle_refs->size)
return handle_refs->handle_ref_count[handle - 1];
}
return 0;
}
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