media: rkvdec: Fix frame size enumeration

[ Upstream commit f270005b99fa19fee9a6b4006e8dee37c10f1944 ]

The VIDIOC_ENUM_FRAMESIZES ioctl should return all frame sizes (i.e.
width and height in pixels) that the device supports for the given pixel
format.

It doesn't make a lot of sense to return the frame-sizes in a stepwise
manner, which is used to enforce hardware alignments requirements for
CAPTURE buffers, for coded formats.

Instead, applications should receive an indication, about the maximum
supported frame size for that hardware decoder, via a continuous
frame-size enumeration.

Fixes: cd33c830448b ("media: rkvdec: Add the rkvdec driver")
Suggested-by: Alex Bee <knaerzche@gmail.com>
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c
index 86483f1c070b9350c0357f73b9bc7a137d79be92..a5eca08ff259722714af87ca008fc711bb7f4ab1 100644 (file)
--- a/drivers/staging/media/rkvdec/rkvdec.c
+++ b/drivers/staging/media/rkvdec/rkvdec.c
@@ -178,8 +178,14 @@ static int rkvdec_enum_framesizes(struct file *file, void *priv,
        if (!fmt)
                return -EINVAL;
 
-       fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
-       fsize->stepwise = fmt->frmsize;
+       fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
+       fsize->stepwise.min_width = 1;
+       fsize->stepwise.max_width = fmt->frmsize.max_width;
+       fsize->stepwise.step_width = 1;
+       fsize->stepwise.min_height = 1;
+       fsize->stepwise.max_height = fmt->frmsize.max_height;
+       fsize->stepwise.step_height = 1;
+
        return 0;
 }