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media: bcm2835-unicam: Re-fetch mbus code from subdev on a g_fmt call

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The sensor subdevice may change the Bayer order if a H/V flip is
requested after a s_fmt call.  Unicam g_fmt must call the subdev get_fmt
in case this has happened and return out the correct format 4cc.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
This commit is contained in:
Naushir Patuck
2020-04-21 16:26:03 +01:00
committed by popcornmix
parent cdde282609
commit a98c39556a
1 changed files with 20 additions and 1 deletions
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21
drivers/media/platform/bcm2835/bcm2835-unicam.c
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@@ -967,11 +967,30 @@ static int unicam_enum_fmt_vid_cap(struct file *file, void *priv,
static int unicam_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct v4l2_mbus_framefmt mbus_fmt = {0};
struct unicam_node *node = video_drvdata(file);
struct unicam_device *dev = node->dev;
const struct unicam_fmt *fmt = NULL;
int ret;
if (node->pad_id == METADATA_PAD)
if (node->pad_id != IMAGE_PAD)
return -EINVAL;
/*
* If a flip has occurred in the sensor, the fmt code might have
* changed. So we will need to re-fetch the format from the subdevice.
*/
ret = __subdev_get_format(dev, &mbus_fmt, node->pad_id);
if (ret)
return -EINVAL;
/* Find the V4L2 format from mbus code. We must match a known format. */
fmt = find_format_by_code(mbus_fmt.code);
if (!fmt)
return -EINVAL;
node->fmt = fmt;
node->v_fmt.fmt.pix.pixelformat = fmt->fourcc;
*f = node->v_fmt;
return 0;