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Subject[Patch 08/16] media: ti-vpe: vpe: fix a v4l2-compliance warning about invalid pixel format
Date
v4l2-compliance warns with this message:

warn: v4l2-test-formats.cpp(717): \
TRY_FMT cannot handle an invalid pixelformat.
warn: v4l2-test-formats.cpp(718): \
This may or may not be a problem. For more information see:
warn: v4l2-test-formats.cpp(719): \
http://www.mail-archive.com/linux-media@vger.kernel.org/msg56550.html
...
test VIDIOC_TRY_FMT: FAIL

We need to make sure that the returns a valid pixel format in all
instance. Based on the v4l2 framework convention drivers must return a
valid pixel format when the requested pixel format is either invalid or
not supported.

Signed-off-by: Benoit Parrot <bparrot@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
drivers/media/platform/ti-vpe/vpe.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
index 1278d457f753..d3f1ae8b72fa 100644
--- a/drivers/media/platform/ti-vpe/vpe.c
+++ b/drivers/media/platform/ti-vpe/vpe.c
@@ -351,20 +351,25 @@ enum {
};

/* find our format description corresponding to the passed v4l2_format */
-static struct vpe_fmt *find_format(struct v4l2_format *f)
+static struct vpe_fmt *__find_format(u32 fourcc)
{
struct vpe_fmt *fmt;
unsigned int k;

for (k = 0; k < ARRAY_SIZE(vpe_formats); k++) {
fmt = &vpe_formats[k];
- if (fmt->fourcc == f->fmt.pix.pixelformat)
+ if (fmt->fourcc == fourcc)
return fmt;
}

return NULL;
}

+static struct vpe_fmt *find_format(struct v4l2_format *f)
+{
+ return __find_format(f->fmt.pix.pixelformat);
+}
+
/*
* there is one vpe_dev structure in the driver, it is shared by
* all instances.
@@ -1599,9 +1604,9 @@ static int __vpe_try_fmt(struct vpe_ctx *ctx, struct v4l2_format *f,
unsigned int stride = 0;

if (!fmt || !(fmt->types & type)) {
- vpe_err(ctx->dev, "Fourcc format (0x%08x) invalid.\n",
+ vpe_dbg(ctx->dev, "Fourcc format (0x%08x) invalid.\n",
pix->pixelformat);
- return -EINVAL;
+ fmt = __find_format(V4L2_PIX_FMT_YUYV);
}

if (pix->field != V4L2_FIELD_NONE &&
--
2.17.1
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