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media: verisilicon: Use V4L2_FMTDESC_FLAG_ENUM_ALL flag

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By adding support for the V4L2_FMTDESC_FLAG_ENUM_ALL flag into the driver
we allow userspace applications to discover all possible
pixel formats of the hardware block. This way userspace can decide
which decoder to use given the supported pixel formats.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Benjamin Gaignard
2024-08-26 17:24:10 +00:00
committed by Hans Verkuil
parent 1faaae7760
commit bcd4f091cf
1 changed files with 13 additions and 5 deletions
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18
drivers/media/platform/verisilicon/hantro_v4l2.c
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@@ -201,7 +201,15 @@ static int vidioc_enum_fmt(struct file *file, void *priv,
struct hantro_ctx *ctx = fh_to_ctx(priv);
const struct hantro_fmt *fmt, *formats;
unsigned int num_fmts, i, j = 0;
bool skip_mode_none;
bool skip_mode_none, enum_all_formats;
u32 index = f->index & ~V4L2_FMTDESC_FLAG_ENUM_ALL;
/*
* If the V4L2_FMTDESC_FLAG_ENUM_ALL flag is set, we want to enumerate all
* hardware supported pixel formats
*/
enum_all_formats = !!(f->index & V4L2_FMTDESC_FLAG_ENUM_ALL);
f->index = index;
/*
* When dealing with an encoder:
@@ -222,9 +230,9 @@ static int vidioc_enum_fmt(struct file *file, void *priv,
if (skip_mode_none == mode_none)
continue;
if (!hantro_check_depth_match(fmt, ctx->bit_depth))
if (!hantro_check_depth_match(fmt, ctx->bit_depth) && !enum_all_formats)
continue;
if (j == f->index) {
if (j == index) {
f->pixelformat = fmt->fourcc;
return 0;
}
@@ -242,9 +250,9 @@ static int vidioc_enum_fmt(struct file *file, void *priv,
for (i = 0; i < num_fmts; i++) {
fmt = &formats[i];
if (!hantro_check_depth_match(fmt, ctx->bit_depth))
if (!hantro_check_depth_match(fmt, ctx->bit_depth) && !enum_all_formats)
continue;
if (j == f->index) {
if (j == index) {
f->pixelformat = fmt->fourcc;
return 0;
}