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render/timeline: add wlr_render_timeline_import_dmabuf

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Same as wlr_render_timeline_import_sync_file, but takes a DMA-BUF
as argument. Depends on [1].

[1]: https://lore.kernel.org/dri-devel/20210610210925.642582-5-jason@jlekstrand.net/
This commit is contained in:
Simon Ser 2021-10-20 19:01:40 +02:00
parent 5a1f18666a
commit 7a661e4c38
2 changed files with 42 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

11
include/wlr/render/timeline.h
View file

@ -56,5 +56,16 @@ int wlr_render_timeline_export_sync_file(struct wlr_render_timeline *timeline,
*/
bool wlr_render_timeline_import_sync_file(struct wlr_render_timeline *timeline,
uint64_t dst_point, int sync_file_fd);
/**
* Import a timeline point from a DMA-BUF's implicit fence.
*
* The provided timeline point will be signalled when the DMA-BUF's producer
* has finished their write operations.
*
* This allows inter-operation with other APIs which don't support drm_syncobj
* nor sync_file yet.
*/
bool wlr_render_timeline_import_dmabuf(struct wlr_render_timeline *timeline,
uint64_t dst_point, int dmabuf_fd);
#endif

32
render/timeline.c
View file

@ -1,5 +1,7 @@
#include <xf86drm.h>
#include <linux/dma-buf.h>
#include <stdlib.h>
#include <unistd.h>
#include <xf86drm.h>
#include <wlr/render/timeline.h>
#include <wlr/util/log.h>
@ -84,3 +86,31 @@ out:
drmSyncobjDestroy(timeline->drm_fd, syncobj_handle);
return ok;
}
#ifndef DMA_BUF_IOCTL_EXPORT_SYNC_FILE
struct dma_buf_export_sync_file {
__u32 flags;
__s32 fd;
};
#define DMA_BUF_IOCTL_EXPORT_SYNC_FILE _IOWR(DMA_BUF_BASE, 2, struct dma_buf_export_sync_file)
#endif
bool wlr_render_timeline_import_dmabuf(struct wlr_render_timeline *timeline,
uint64_t dst_point, int dmabuf_fd) {
struct dma_buf_export_sync_file ioctl_data = {
.flags = DMA_BUF_SYNC_READ,
};
if (drmIoctl(dmabuf_fd, DMA_BUF_IOCTL_EXPORT_SYNC_FILE,
&ioctl_data) != 0) {
wlr_log_errno(WLR_ERROR, "drmIoctl(EXPORT_SYNC_FILE) failed");
return false;
}
bool ok = wlr_render_timeline_import_sync_file(timeline,
ioctl_data.fd, dst_point);
close(ioctl_data.fd);
return ok;
}