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Remove use of DMA_BUF_IOCTL_SYNC

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It's only necessary on "real" DMA-BUFs, not dumb buffers.
This commit is contained in:
Cameron Gutman
2026-01-02 01:30:03 -06:00
parent d50ba06321
commit be460970a8
1 changed files with 0 additions and 26 deletions
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app/streaming/video/ffmpeg-renderers/drm.cpp
-26
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@@ -12,23 +12,6 @@ extern "C" {
} }
#include <libdrm/drm_fourcc.h> #include <libdrm/drm_fourcc.h>
#ifdef __linux__
#include <linux/dma-buf.h>
#else //bundle on BSDs
typedef uint64_t __u64;
struct dma_buf_sync {
__u64 flags;
};
#define DMA_BUF_SYNC_READ (1 << 0)
#define DMA_BUF_SYNC_WRITE (2 << 0)
#define DMA_BUF_SYNC_RW (DMA_BUF_SYNC_READ | DMA_BUF_SYNC_WRITE)
#define DMA_BUF_SYNC_START (0 << 2)
#define DMA_BUF_SYNC_END (1 << 2)
#define DMA_BUF_SYNC_VALID_FLAGS_MASK \
(DMA_BUF_SYNC_RW | DMA_BUF_SYNC_END)
#define DMA_BUF_BASE 'b'
#define DMA_BUF_IOCTL_SYNC _IOW(DMA_BUF_BASE, 0, struct dma_buf_sync)
#endif
// Special Rockchip type // Special Rockchip type
#ifndef DRM_FORMAT_NA12 #ifndef DRM_FORMAT_NA12
@@ -973,11 +956,6 @@ bool DrmRenderer::mapSoftwareFrame(AVFrame *frame, AVDRMFrameDescriptor *mappedF
auto &layer = mappedFrame->layers[0]; auto &layer = mappedFrame->layers[0];
layer.format = drmFormatTuple->second; layer.format = drmFormatTuple->second;
// Prepare to write to the dumb buffer from the CPU
struct dma_buf_sync sync;
sync.flags = DMA_BUF_SYNC_START | DMA_BUF_SYNC_WRITE;
drmIoctl(drmFrame->primeFd, DMA_BUF_IOCTL_SYNC, &sync);
int lastPlaneSize = 0; int lastPlaneSize = 0;
for (int i = 0; i < 4; i++) { for (int i = 0; i < 4; i++) {
if (frame->data[i] != nullptr) { if (frame->data[i] != nullptr) {
@@ -1025,10 +1003,6 @@ bool DrmRenderer::mapSoftwareFrame(AVFrame *frame, AVDRMFrameDescriptor *mappedF
lastPlaneSize = plane.pitch * planeHeight; lastPlaneSize = plane.pitch * planeHeight;
} }
} }
// End the CPU write to the dumb buffer
sync.flags = DMA_BUF_SYNC_END | DMA_BUF_SYNC_WRITE;
drmIoctl(drmFrame->primeFd, DMA_BUF_IOCTL_SYNC, &sync);
} }
ret = true; ret = true;