diff mbox series

[v2,06/20] media: i2c: ov4689: Refactor ov4689_set_ctrl

Message ID 20231218174042.794012-7-mike.rudenko@gmail.com
State New
Headers
Series Omnivision OV4689 refactoring and improvements |

Commit Message

Mikhail Rudenko Dec. 18, 2023, 5:40 p.m. UTC 
  Introduce local variable for regmap within the ov4689_set_ctrl
function. This adjustment eliminates repetition within the function.

Signed-off-by: Mikhail Rudenko <mike.rudenko@gmail.com>
---
 drivers/media/i2c/ov4689.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

Comments

Sakari Ailus Jan. 8, 2024, 11:16 a.m. UTC | #1 
Hi Mikhail,

On Mon, Dec 18, 2023 at 08:40:27PM +0300, Mikhail Rudenko wrote:
> Introduce local variable for regmap within the ov4689_set_ctrl
> function. This adjustment eliminates repetition within the function.
> 
> Signed-off-by: Mikhail Rudenko <mike.rudenko@gmail.com>
> ---
>  drivers/media/i2c/ov4689.c | 11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/media/i2c/ov4689.c b/drivers/media/i2c/ov4689.c
> index 3b20eba59c9c..d42f5d1a1ba8 100644
> --- a/drivers/media/i2c/ov4689.c
> +++ b/drivers/media/i2c/ov4689.c
> @@ -580,6 +580,7 @@ static int ov4689_set_ctrl(struct v4l2_ctrl *ctrl)
>  {
>  	struct ov4689 *ov4689 =
>  		container_of(ctrl->handler, struct ov4689, ctrl_handler);
> +	struct regmap *regmap = ov4689->regmap;
>  	struct device *dev = ov4689->dev;
>  	int sensor_gain;
>  	s64 max_expo;
> @@ -603,16 +604,15 @@ static int ov4689_set_ctrl(struct v4l2_ctrl *ctrl)
>  	switch (ctrl->id) {
>  	case V4L2_CID_EXPOSURE:
>  		/* 4 least significant bits of exposure are fractional part */
> -		ret = cci_write(ov4689->regmap, OV4689_REG_EXPOSURE,
> -				ctrl->val << 4, NULL);
> +		cci_write(regmap, OV4689_REG_EXPOSURE, ctrl->val << 4, &ret);

If you do this, ret needs to have been initialised to 0, but it isn't.

Same for the changes below.

>  		break;
>  	case V4L2_CID_ANALOGUE_GAIN:
>  		ret = ov4689_map_gain(ov4689, ctrl->val, &sensor_gain);
> -		cci_write(ov4689->regmap, OV4689_REG_GAIN, sensor_gain, &ret);
> +		cci_write(regmap, OV4689_REG_GAIN, sensor_gain, &ret);
>  		break;
>  	case V4L2_CID_VBLANK:
> -		ret = cci_write(ov4689->regmap, OV4689_REG_VTS,
> -				ctrl->val + ov4689->cur_mode->height, NULL);
> +		cci_write(regmap, OV4689_REG_VTS,
> +			  ctrl->val + ov4689->cur_mode->height, &ret);
>  		break;
>  	case V4L2_CID_TEST_PATTERN:
>  		ret = ov4689_enable_test_pattern(ov4689, ctrl->val);
> @@ -625,7 +625,6 @@ static int ov4689_set_ctrl(struct v4l2_ctrl *ctrl)
>  	}
>  
>  	pm_runtime_put(dev);
> -

I thought it was nice.

>  	return ret;
>  }
>
Mikhail Rudenko Jan. 8, 2024, 2:57 p.m. UTC | #2 
Hi Sakari,

Thanks for the review!

On 2024-01-08 at 11:16 GMT, Sakari Ailus <sakari.ailus@iki.fi> wrote:

> Hi Mikhail,
>
> On Mon, Dec 18, 2023 at 08:40:27PM +0300, Mikhail Rudenko wrote:
>> Introduce local variable for regmap within the ov4689_set_ctrl
>> function. This adjustment eliminates repetition within the function.
>>
>> Signed-off-by: Mikhail Rudenko <mike.rudenko@gmail.com>
>> ---
>>  drivers/media/i2c/ov4689.c | 11 +++++------
>>  1 file changed, 5 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/media/i2c/ov4689.c b/drivers/media/i2c/ov4689.c
>> index 3b20eba59c9c..d42f5d1a1ba8 100644
>> --- a/drivers/media/i2c/ov4689.c
>> +++ b/drivers/media/i2c/ov4689.c
>> @@ -580,6 +580,7 @@ static int ov4689_set_ctrl(struct v4l2_ctrl *ctrl)
>>  {
>>  	struct ov4689 *ov4689 =
>>  		container_of(ctrl->handler, struct ov4689, ctrl_handler);
>> +	struct regmap *regmap = ov4689->regmap;
>>  	struct device *dev = ov4689->dev;
>>  	int sensor_gain;
>>  	s64 max_expo;
>> @@ -603,16 +604,15 @@ static int ov4689_set_ctrl(struct v4l2_ctrl *ctrl)
>>  	switch (ctrl->id) {
>>  	case V4L2_CID_EXPOSURE:
>>  		/* 4 least significant bits of exposure are fractional part */
>> -		ret = cci_write(ov4689->regmap, OV4689_REG_EXPOSURE,
>> -				ctrl->val << 4, NULL);
>> +		cci_write(regmap, OV4689_REG_EXPOSURE, ctrl->val << 4, &ret);
>
> If you do this, ret needs to have been initialised to 0, but it isn't.
>
> Same for the changes below.

Nice catch, will fix it in v3.

>>  		break;
>>  	case V4L2_CID_ANALOGUE_GAIN:
>>  		ret = ov4689_map_gain(ov4689, ctrl->val, &sensor_gain);
>> -		cci_write(ov4689->regmap, OV4689_REG_GAIN, sensor_gain, &ret);
>> +		cci_write(regmap, OV4689_REG_GAIN, sensor_gain, &ret);
>>  		break;
>>  	case V4L2_CID_VBLANK:
>> -		ret = cci_write(ov4689->regmap, OV4689_REG_VTS,
>> -				ctrl->val + ov4689->cur_mode->height, NULL);
>> +		cci_write(regmap, OV4689_REG_VTS,
>> +			  ctrl->val + ov4689->cur_mode->height, &ret);
>>  		break;
>>  	case V4L2_CID_TEST_PATTERN:
>>  		ret = ov4689_enable_test_pattern(ov4689, ctrl->val);
>> @@ -625,7 +625,6 @@ static int ov4689_set_ctrl(struct v4l2_ctrl *ctrl)
>>  	}
>>
>>  	pm_runtime_put(dev);
>> -
>
> I thought it was nice.

Will get the blank line back in v3, especially since "Use runtime
autosuspend" patch (09/20) restores it.

>>  	return ret;
>>  }
>>


--
Best regards,
Mikhail Rudenko
diff mbox series

Patch

diff --git a/drivers/media/i2c/ov4689.c b/drivers/media/i2c/ov4689.c
index 3b20eba59c9c..d42f5d1a1ba8 100644
--- a/drivers/media/i2c/ov4689.c
+++ b/drivers/media/i2c/ov4689.c
@@ -580,6 +580,7 @@  static int ov4689_set_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct ov4689 *ov4689 =
 		container_of(ctrl->handler, struct ov4689, ctrl_handler);
+	struct regmap *regmap = ov4689->regmap;
 	struct device *dev = ov4689->dev;
 	int sensor_gain;
 	s64 max_expo;
@@ -603,16 +604,15 @@  static int ov4689_set_ctrl(struct v4l2_ctrl *ctrl)
 	switch (ctrl->id) {
 	case V4L2_CID_EXPOSURE:
 		/* 4 least significant bits of exposure are fractional part */
-		ret = cci_write(ov4689->regmap, OV4689_REG_EXPOSURE,
-				ctrl->val << 4, NULL);
+		cci_write(regmap, OV4689_REG_EXPOSURE, ctrl->val << 4, &ret);
 		break;
 	case V4L2_CID_ANALOGUE_GAIN:
 		ret = ov4689_map_gain(ov4689, ctrl->val, &sensor_gain);
-		cci_write(ov4689->regmap, OV4689_REG_GAIN, sensor_gain, &ret);
+		cci_write(regmap, OV4689_REG_GAIN, sensor_gain, &ret);
 		break;
 	case V4L2_CID_VBLANK:
-		ret = cci_write(ov4689->regmap, OV4689_REG_VTS,
-				ctrl->val + ov4689->cur_mode->height, NULL);
+		cci_write(regmap, OV4689_REG_VTS,
+			  ctrl->val + ov4689->cur_mode->height, &ret);
 		break;
 	case V4L2_CID_TEST_PATTERN:
 		ret = ov4689_enable_test_pattern(ov4689, ctrl->val);
@@ -625,7 +625,6 @@  static int ov4689_set_ctrl(struct v4l2_ctrl *ctrl)
 	}
 
 	pm_runtime_put(dev);
-
 	return ret;
 }