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Subject: media: i2c: alvium: fix req_fr check in alvium_s_frame_interval()
Author: Tommaso Merciai <tomm.merc...@gmail.com>
Date: Wed Dec 20 13:40:23 2023 +0100
req_fr check in alvium_s_frame_interval() is incorrect. In particular
req_fr can't be >=max and <= min at the same time. Ensure the requested
frame rate remains within the supported range between min_fr and max_fr by
clamping it.
Also remove the unused dft_fr argument of alvium_get_frame_interval().
Signed-off-by: Tommaso Merciai <tomm.merc...@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
drivers/media/i2c/alvium-csi2.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
---
diff --git a/drivers/media/i2c/alvium-csi2.c b/drivers/media/i2c/alvium-csi2.c
index 1d85de53b62d..e65702e3f73e 100644
--- a/drivers/media/i2c/alvium-csi2.c
+++ b/drivers/media/i2c/alvium-csi2.c
@@ -1171,12 +1171,10 @@ static int alvium_set_bayer_pattern(struct alvium_dev
*alvium,
}
static int alvium_get_frame_interval(struct alvium_dev *alvium,
- u64 *dft_fr, u64 *min_fr, u64 *max_fr)
+ u64 *min_fr, u64 *max_fr)
{
int ret = 0;
- alvium_read(alvium, REG_BCRM_ACQUISITION_FRAME_RATE_RW,
- dft_fr, &ret);
alvium_read(alvium, REG_BCRM_ACQUISITION_FRAME_RATE_MIN_R,
min_fr, &ret);
alvium_read(alvium, REG_BCRM_ACQUISITION_FRAME_RATE_MAX_R,
@@ -1647,7 +1645,7 @@ static int alvium_s_frame_interval(struct v4l2_subdev *sd,
{
struct alvium_dev *alvium = sd_to_alvium(sd);
struct device *dev = &alvium->i2c_client->dev;
- u64 req_fr, dft_fr, min_fr, max_fr;
+ u64 req_fr, min_fr, max_fr;
struct v4l2_fract *interval;
int ret;
@@ -1657,7 +1655,7 @@ static int alvium_s_frame_interval(struct v4l2_subdev *sd,
if (fi->interval.denominator == 0)
return -EINVAL;
- ret = alvium_get_frame_interval(alvium, &dft_fr, &min_fr, &max_fr);
+ ret = alvium_get_frame_interval(alvium, &min_fr, &max_fr);
if (ret) {
dev_err(dev, "Fail to get frame interval\n");
return ret;
@@ -1670,9 +1668,7 @@ static int alvium_s_frame_interval(struct v4l2_subdev *sd,
req_fr = (u64)((fi->interval.denominator * USEC_PER_SEC) /
fi->interval.numerator);
-
- if (req_fr >= max_fr && req_fr <= min_fr)
- req_fr = dft_fr;
+ req_fr = clamp(req_fr, min_fr, max_fr);
interval = v4l2_subdev_state_get_interval(sd_state, 0);
