Re: [PATCH v2 3/6] media: i2c: imx290: Add RAW12 mode support

[Sakari Ailus]

Hi Manivannan,

On Thu, Dec 19, 2019 at 11:52:19PM +0530, Manivannan Sadhasivam wrote:
> IMX290 is capable of outputting frames in both Raw Bayer (packed) 10 and
> 12 bit formats. Since the driver already supports RAW10 mode, let's add
> the missing RAW12 mode as well.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
> ---
>  drivers/media/i2c/imx290.c | 32 ++++++++++++++++++++++++++++++++
>  1 file changed, 32 insertions(+)
> 
> diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
> index 96eea0aafd3e..b6eeca56d3c9 100644
> --- a/drivers/media/i2c/imx290.c
> +++ b/drivers/media/i2c/imx290.c
> @@ -75,6 +75,7 @@ struct imx290 {
>  	struct clk *xclk;
>  	struct regmap *regmap;
>  	u8 nlanes;
> +	u8 bpp;
>  
>  	struct v4l2_subdev sd;
>  	struct v4l2_fwnode_endpoint ep;
> @@ -98,6 +99,7 @@ struct imx290_pixfmt {
>  
>  static const struct imx290_pixfmt imx290_formats[] = {
>  	{ MEDIA_BUS_FMT_SRGGB10_1X10 },
> +	{ MEDIA_BUS_FMT_SRGGB12_1X12 },
>  };
>  
>  static const struct regmap_config imx290_regmap_config = {
> @@ -265,6 +267,18 @@ static const struct imx290_regval imx290_10bit_settings[] = {
>  	{ 0x300b, 0x00},
>  };
>  
> +static const struct imx290_regval imx290_12bit_settings[] = {
> +	{ 0x3005, 0x01 },
> +	{ 0x3046, 0x01 },
> +	{ 0x3129, 0x00 },
> +	{ 0x317c, 0x00 },
> +	{ 0x31ec, 0x0e },
> +	{ 0x3441, 0x0c },
> +	{ 0x3442, 0x0c },
> +	{ 0x300a, 0xf0 },
> +	{ 0x300b, 0x00 },
> +};
> +
>  /* supported link frequencies */
>  static const s64 imx290_link_freq[] = {
>  	IMX290_DEFAULT_LINK_FREQ,
> @@ -550,6 +564,21 @@ static int imx290_write_current_format(struct imx290 *imx290,
>  			dev_err(imx290->dev, "Could not set format registers\n");
>  			return ret;
>  		}
> +
> +		imx290->bpp = 10;
> +
> +		break;
> +	case MEDIA_BUS_FMT_SRGGB12_1X12:
> +		ret = imx290_set_register_array(imx290, imx290_12bit_settings,
> +						ARRAY_SIZE(
> +							imx290_12bit_settings));
> +		if (ret < 0) {
> +			dev_err(imx290->dev, "Could not set format registers\n");
> +			return ret;
> +		}
> +
> +		imx290->bpp = 12;
> +
>  		break;
>  	default:
>  		dev_err(imx290->dev, "Unknown pixel format\n");
> @@ -913,6 +942,9 @@ static int imx290_probe(struct i2c_client *client)
>  		goto free_err;
>  	}
>  
> +	/* Default bits per pixel value */
> +	imx290->bpp = 10;

This has an effect on the pixel rate; please calculate the value based on
bpp.

> +
>  	mutex_init(&imx290->lock);
>  
>  	v4l2_ctrl_handler_init(&imx290->ctrls, 4);

-- 
Regards,

Sakari Ailus