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V4L/DVB (12524): soc-camera: S_CROP V4L2 API compliance fix

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V4L2 API mandates, that drivers do not update the argument of the S_CROP
ioctl() with the actual geometry. Comply.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Guennadi Liakhovetski 2009-08-25 11:46:52 -03:00 committed by Mauro Carvalho Chehab
parent 123ab622c0
commit 68a54f0e53
1 changed files with 23 additions and 16 deletions
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39
drivers/media/video/soc_camera.c
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@ -747,12 +747,19 @@ static int soc_camera_g_crop(struct file *file, void *fh,
return 0; return 0;
} }
/*
* According to the V4L2 API, drivers shall not update the struct v4l2_crop
* argument with the actual geometry, instead, the user shall use G_CROP to
* retrieve it. However, we expect camera host and client drivers to update
* the argument, which we then use internally, but do not return to the user.
*/
static int soc_camera_s_crop(struct file *file, void *fh, static int soc_camera_s_crop(struct file *file, void *fh,
struct v4l2_crop *a) struct v4l2_crop *a)
{ {
struct soc_camera_file *icf = file->private_data; struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd; struct soc_camera_device *icd = icf->icd;
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct v4l2_rect rect = a->c;
int ret; int ret;
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
@ -761,29 +768,29 @@ static int soc_camera_s_crop(struct file *file, void *fh,
/* Cropping is allowed during a running capture, guard consistency */ /* Cropping is allowed during a running capture, guard consistency */
mutex_lock(&icf->vb_vidq.vb_lock); mutex_lock(&icf->vb_vidq.vb_lock);
if (a->c.width > icd->rect_max.width) if (rect.width > icd->rect_max.width)
a->c.width = icd->rect_max.width; rect.width = icd->rect_max.width;
if (a->c.width < icd->width_min) if (rect.width < icd->width_min)
a->c.width = icd->width_min; rect.width = icd->width_min;
if (a->c.height > icd->rect_max.height) if (rect.height > icd->rect_max.height)
a->c.height = icd->rect_max.height; rect.height = icd->rect_max.height;
if (a->c.height < icd->height_min) if (rect.height < icd->height_min)
a->c.height = icd->height_min; rect.height = icd->height_min;
if (a->c.width + a->c.left > icd->rect_max.width + icd->rect_max.left) if (rect.width + rect.left > icd->rect_max.width + icd->rect_max.left)
a->c.left = icd->rect_max.width + icd->rect_max.left - rect.left = icd->rect_max.width + icd->rect_max.left -
a->c.width; rect.width;
if (a->c.height + a->c.top > icd->rect_max.height + icd->rect_max.top) if (rect.height + rect.top > icd->rect_max.height + icd->rect_max.top)
a->c.top = icd->rect_max.height + icd->rect_max.top - rect.top = icd->rect_max.height + icd->rect_max.top -
a->c.height; rect.height;
ret = ici->ops->set_crop(icd, &a->c); ret = ici->ops->set_crop(icd, &rect);
if (!ret) if (!ret)
icd->rect_current = a->c; icd->rect_current = rect;
mutex_unlock(&icf->vb_vidq.vb_lock); mutex_unlock(&icf->vb_vidq.vb_lock);