Re: [PATCH] staging: media: atomisp: replace pr_info() by dev_info()

[Hans Verkuil]

On 22/04/2021 12:30, Deepak R Varma wrote:
> It is recommended to use driver model diagnostic macros dev_*() instead
> of pr_*() since the former ensures that the log messages are always
> associated with the corresponding device and driver.
> 
> Suggested-by: Fabio Aiuto <fabioaiuto83@xxxxxxxxx>
> Signed-off-by: Deepak R Varma <drv@xxxxxxxxx>
> ---
> 
> Note: There are few more pr_into() calls that I have not replaced since
> they are very basic (entry and exit) and temporary. They can be removed 
> if the APIs are fully tested. See this example:
> 	pr_info("%s S\n", __func__);
> 
> Let me know if I should remove them and resubmit this patch.
> 
> 
>  .../media/atomisp/i2c/atomisp-gc0310.c        | 30 +++++++++----------
>  1 file changed, 15 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c b/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c
> index 7e4e123fdb52..27153ec6f65e 100644
> --- a/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c
> +++ b/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c
> @@ -300,7 +300,7 @@ static int gc0310_get_intg_factor(struct i2c_client *client,
>  	/* pixel clock calculattion */
>  	dev->vt_pix_clk_freq_mhz = 14400000; // 16.8MHz
>  	buf->vt_pix_clk_freq_mhz = dev->vt_pix_clk_freq_mhz;
> -	pr_info("vt_pix_clk_freq_mhz=%d\n", buf->vt_pix_clk_freq_mhz);
> +	dev_info(&client->dev, "vt_pix_clk_freq_mhz=%d\n", buf->vt_pix_clk_freq_mhz);

Use dev_dbg instead to avoid spamming the kernel log with all these
messages. dev_dbg is perfectly fine for this, but not pr_info/dev_info.

Regards,

	Hans

>  
>  	/* get integration time */
>  	buf->coarse_integration_time_min = GC0310_COARSE_INTG_TIME_MIN;
> @@ -326,7 +326,7 @@ static int gc0310_get_intg_factor(struct i2c_client *client,
>  	if (ret)
>  		return ret;
>  	buf->crop_horizontal_start = val | (reg_val & 0xFF);
> -	pr_info("crop_horizontal_start=%d\n", buf->crop_horizontal_start);
> +	dev_info(&client->dev, "crop_horizontal_start=%d\n", buf->crop_horizontal_start);
>  
>  	/* Getting crop_vertical_start */
>  	ret =  gc0310_read_reg(client, GC0310_8BIT,
> @@ -339,7 +339,7 @@ static int gc0310_get_intg_factor(struct i2c_client *client,
>  	if (ret)
>  		return ret;
>  	buf->crop_vertical_start = val | (reg_val & 0xFF);
> -	pr_info("crop_vertical_start=%d\n", buf->crop_vertical_start);
> +	dev_info(&client->dev, "crop_vertical_start=%d\n", buf->crop_vertical_start);
>  
>  	/* Getting output_width */
>  	ret = gc0310_read_reg(client, GC0310_8BIT,
> @@ -352,7 +352,7 @@ static int gc0310_get_intg_factor(struct i2c_client *client,
>  	if (ret)
>  		return ret;
>  	buf->output_width = val | (reg_val & 0xFF);
> -	pr_info("output_width=%d\n", buf->output_width);
> +	dev_info(&client->dev, "output_width=%d\n", buf->output_width);
>  
>  	/* Getting output_height */
>  	ret = gc0310_read_reg(client, GC0310_8BIT,
> @@ -365,12 +365,12 @@ static int gc0310_get_intg_factor(struct i2c_client *client,
>  	if (ret)
>  		return ret;
>  	buf->output_height = val | (reg_val & 0xFF);
> -	pr_info("output_height=%d\n", buf->output_height);
> +	dev_info(&client->dev, "output_height=%d\n", buf->output_height);
>  
>  	buf->crop_horizontal_end = buf->crop_horizontal_start + buf->output_width - 1;
>  	buf->crop_vertical_end = buf->crop_vertical_start + buf->output_height - 1;
> -	pr_info("crop_horizontal_end=%d\n", buf->crop_horizontal_end);
> -	pr_info("crop_vertical_end=%d\n", buf->crop_vertical_end);
> +	dev_info(&client->dev, "crop_horizontal_end=%d\n", buf->crop_horizontal_end);
> +	dev_info(&client->dev, "crop_vertical_end=%d\n", buf->crop_vertical_end);
>  
>  	/* Getting line_length_pck */
>  	ret = gc0310_read_reg(client, GC0310_8BIT,
> @@ -389,8 +389,8 @@ static int gc0310_get_intg_factor(struct i2c_client *client,
>  		return ret;
>  	sh_delay = reg_val;
>  	buf->line_length_pck = buf->output_width + hori_blanking + sh_delay + 4;
> -	pr_info("hori_blanking=%d sh_delay=%d line_length_pck=%d\n", hori_blanking,
> -		sh_delay, buf->line_length_pck);
> +	dev_info(&client->dev, "hori_blanking=%d sh_delay=%d line_length_pck=%d\n", hori_blanking,
> +		 sh_delay, buf->line_length_pck);
>  
>  	/* Getting frame_length_lines */
>  	ret = gc0310_read_reg(client, GC0310_8BIT,
> @@ -404,8 +404,8 @@ static int gc0310_get_intg_factor(struct i2c_client *client,
>  		return ret;
>  	vert_blanking = val | (reg_val & 0xFF);
>  	buf->frame_length_lines = buf->output_height + vert_blanking;
> -	pr_info("vert_blanking=%d frame_length_lines=%d\n", vert_blanking,
> -		buf->frame_length_lines);
> +	dev_info(&client->dev, "vert_blanking=%d frame_length_lines=%d\n", vert_blanking,
> +		 buf->frame_length_lines);
>  
>  	buf->binning_factor_x = res->bin_factor_x ?
>  				res->bin_factor_x : 1;
> @@ -434,7 +434,7 @@ static int gc0310_set_gain(struct v4l2_subdev *sd, int gain)
>  		dgain = gain / 2;
>  	}
>  
> -	pr_info("gain=0x%x again=0x%x dgain=0x%x\n", gain, again, dgain);
> +	dev_info(&client->dev, "gain=0x%x again=0x%x dgain=0x%x\n", gain, again, dgain);
>  
>  	/* set analog gain */
>  	ret = gc0310_write_reg(client, GC0310_8BIT,
> @@ -458,7 +458,7 @@ static int __gc0310_set_exposure(struct v4l2_subdev *sd, int coarse_itg,
>  	struct i2c_client *client = v4l2_get_subdevdata(sd);
>  	int ret;
>  
> -	pr_info("coarse_itg=%d gain=%d digitgain=%d\n", coarse_itg, gain, digitgain);
> +	dev_info(&client->dev, "coarse_itg=%d gain=%d digitgain=%d\n", coarse_itg, gain, digitgain);
>  
>  	/* set exposure */
>  	ret = gc0310_write_reg(client, GC0310_8BIT,
> @@ -1085,7 +1085,7 @@ static int gc0310_detect(struct i2c_client *client)
>  		return -ENODEV;
>  	}
>  	id = ((((u16)high) << 8) | (u16)low);
> -	pr_info("sensor ID = 0x%x\n", id);
> +	dev_info(&client->dev, "sensor ID = 0x%x\n", id);
>  
>  	if (id != GC0310_ID) {
>  		dev_err(&client->dev, "sensor ID error, read id = 0x%x, target id = 0x%x\n", id,
> @@ -1106,7 +1106,7 @@ static int gc0310_s_stream(struct v4l2_subdev *sd, int enable)
>  	struct i2c_client *client = v4l2_get_subdevdata(sd);
>  	int ret;
>  
> -	pr_info("%s S enable=%d\n", __func__, enable);
> +	dev_info(&client->dev, "%s S enable=%d\n", __func__, enable);
>  	mutex_lock(&dev->input_lock);
>  
>  	if (enable) {
>