[PATCH 4.19 041/219] media: ov6650: Fix crop rectangle alignment not passed back

Greg Kroah-Hartman
2019-12-29T17:29:20Z

From: Janusz Krzysztofik <jmkrzyszt@gmail.com>

[ Upstream commit 7b188d6ba27a131e7934a51a14ece331c0491f18 ]

Commit 4f996594ceaf ("[media] v4l2: make vidioc_s_crop const")
introduced a writable copy of constified user requested crop rectangle
in order to be able to perform hardware alignments on it. Later
on, commit 10d5509c8d50 ("[media] v4l2: remove g/s_crop from video
ops") replaced s_crop() video operation using that const argument with
set_selection() pad operation which had a corresponding argument not
constified, however the original behavior of the driver was not
restored. Since that time, any hardware alignment applied on a user
requested crop rectangle is not passed back to the user calling
.set_selection() as it should be.

Fix the issue by dropping the copy and replacing all references to it
with references to the crop rectangle embedded in the user argument.

Fixes: 10d5509c8d50 ("[media] v4l2: remove g/s_crop from video ops")
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/i2c/ov6650.c | 31 +++++++++++++++----------------
1 file changed, 15 insertions(+), 16 deletions(-)

diff --git a/drivers/media/i2c/ov6650.c b/drivers/media/i2c/ov6650.c
index edded869d792..e3433a4fc473 100644
--- a/drivers/media/i2c/ov6650.c
+++ b/drivers/media/i2c/ov6650.c
@@ -469,38 +469,37 @@ static int ov6650_set_selection(struct v4l2_subdev *sd,
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov6650 *priv = to_ov6650(client);
- struct v4l2_rect rect = sel->r;
int ret;

if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
sel->target != V4L2_SEL_TGT_CROP)
return -EINVAL;

- v4l_bound_align_image(&rect.width, 2, W_CIF, 1,
- &rect.height, 2, H_CIF, 1, 0);
- v4l_bound_align_image(&rect.left, DEF_HSTRT << 1,
- (DEF_HSTRT << 1) + W_CIF - (__s32)rect.width, 1,
- &rect.top, DEF_VSTRT << 1,
- (DEF_VSTRT << 1) + H_CIF - (__s32)rect.height, 1,
- 0);
+ v4l_bound_align_image(&sel->r.width, 2, W_CIF, 1,
+ &sel->r.height, 2, H_CIF, 1, 0);
+ v4l_bound_align_image(&sel->r.left, DEF_HSTRT << 1,
+ (DEF_HSTRT << 1) + W_CIF - (__s32)sel->r.width, 1,
+ &sel->r.top, DEF_VSTRT << 1,
+ (DEF_VSTRT << 1) + H_CIF - (__s32)sel->r.height,
+ 1, 0);

- ret = ov6650_reg_write(client, REG_HSTRT, rect.left >> 1);
+ ret = ov6650_reg_write(client, REG_HSTRT, sel->r.left >> 1);
if (!ret) {
- priv->rect.left = rect.left;
+ priv->rect.left = sel->r.left;
ret = ov6650_reg_write(client, REG_HSTOP,
- (rect.left + rect.width) >> 1);
+ (sel->r.left + sel->r.width) >> 1);
}
if (!ret) {
- priv->rect.width = rect.width;
- ret = ov6650_reg_write(client, REG_VSTRT, rect.top >> 1);
+ priv->rect.width = sel->r.width;
+ ret = ov6650_reg_write(client, REG_VSTRT, sel->r.top >> 1);
}
if (!ret) {
- priv->rect.top = rect.top;
+ priv->rect.top = sel->r.top;
ret = ov6650_reg_write(client, REG_VSTOP,
- (rect.top + rect.height) >> 1);
+ (sel->r.top + sel->r.height) >> 1);
}
if (!ret)
- priv->rect.height = rect.height;
+ priv->rect.height = sel->r.height;

return ret;
}
--
2.20.1