marfrit/libva-v4l2-request-fourier
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src/config.c: probe both single- and multi-plane V4L2 buffer types

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Bootlin's original probe assumed single-plane decoders (the sunxi-cedrus
target the library was originally written for). Rockchip's hantro VPU
on RK3566/RK3588 reports V4L2_CAP_VIDEO_M2M_MPLANE only — the single-
plane VIDIOC_ENUM_FMT path returns nothing, so vainfo prints an empty
"Supported profile and entrypoints" list and downstream apps fall back
to software.

Add an OUTPUT_MPLANE fallback to all three format probes (MPEG-2, H.264,
HEVC). On a single-plane decoder the second probe is a no-op; on a
multi-plane decoder it's what makes the profile list non-empty.

This is the *probe* fix only — it gets vainfo to enumerate profiles and
gets Brave's GPU process to attempt vaCreateContext. The rest of the
multiplanar port (S_FMT / REQBUFS / EXPBUF / QBUF in context.c, picture.c,
v4l2.c) is the next phase; vaCreateContext currently fails because
those paths are still single-plane only.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Markus Fritsche
2026-04-25 21:27:46 +00:00
parent 4ccbfe923f
commit 2f54a8d9e8
1 changed files with 9 additions and 0 deletions
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src/config.c
+9
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@@ -120,6 +120,9 @@ VAStatus RequestQueryConfigProfiles(VADriverContextP context,
found = v4l2_find_format(driver_data->video_fd,
V4L2_BUF_TYPE_VIDEO_OUTPUT,
V4L2_PIX_FMT_MPEG2_SLICE) ||
v4l2_find_format(driver_data->video_fd,
V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
V4L2_PIX_FMT_MPEG2_SLICE);
if (found && index < (V4L2_REQUEST_MAX_CONFIG_ATTRIBUTES - 2)) {
profiles[index++] = VAProfileMPEG2Simple;
@@ -128,6 +131,9 @@ VAStatus RequestQueryConfigProfiles(VADriverContextP context,
found = v4l2_find_format(driver_data->video_fd,
V4L2_BUF_TYPE_VIDEO_OUTPUT,
V4L2_PIX_FMT_H264_SLICE) ||
v4l2_find_format(driver_data->video_fd,
V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
V4L2_PIX_FMT_H264_SLICE);
if (found && index < (V4L2_REQUEST_MAX_CONFIG_ATTRIBUTES - 5)) {
profiles[index++] = VAProfileH264Main;
@@ -139,6 +145,9 @@ VAStatus RequestQueryConfigProfiles(VADriverContextP context,
found = v4l2_find_format(driver_data->video_fd,
V4L2_BUF_TYPE_VIDEO_OUTPUT,
V4L2_PIX_FMT_HEVC_SLICE) ||
v4l2_find_format(driver_data->video_fd,
V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
V4L2_PIX_FMT_HEVC_SLICE);
if (found && index < (V4L2_REQUEST_MAX_CONFIG_ATTRIBUTES - 1))
profiles[index++] = VAProfileHEVCMain;