diff mbox series

[v2,11/13] media: i2c: imx290: Add support for 74.25MHz external clock

Message ID 20230203191811.947697-12-dave.stevenson@raspberrypi.com (mailing list archive)
State New, archived
Headers show
Series imx290: Minor fixes, support for alternate INCK, and more ctrls | expand

Commit Message

Dave Stevenson Feb. 3, 2023, 7:18 p.m. UTC 
The sensor supports either a 37.125 or 74.25MHz external, but
the driver only supported 37.125MHz.

Add the relevant register configuration for either clock
frequency option.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 drivers/media/i2c/imx290.c | 132 ++++++++++++++++++++++++++++++++-----
 1 file changed, 116 insertions(+), 16 deletions(-)

Comments

Alexander Stein Feb. 6, 2023, 8:24 a.m. UTC | #1 
Hi Dave,

thanks for the update.

Am Freitag, 3. Februar 2023, 20:18:09 CET schrieb Dave Stevenson:
> The sensor supports either a 37.125 or 74.25MHz external, but
> the driver only supported 37.125MHz.
> 
> Add the relevant register configuration for either clock
> frequency option.
> 
> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>

> ---
>  drivers/media/i2c/imx290.c | 132 ++++++++++++++++++++++++++++++++-----
>  1 file changed, 116 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
> index a74930e86a6c..045d27b4d31b 100644
> --- a/drivers/media/i2c/imx290.c
> +++ b/drivers/media/i2c/imx290.c
> @@ -102,6 +102,7 @@
>  #define IMX290_TCLKPREPARE				
IMX290_REG_16BIT(0x3452)
>  #define IMX290_TLPX					
IMX290_REG_16BIT(0x3454)
>  #define IMX290_X_OUT_SIZE				
IMX290_REG_16BIT(0x3472)
> +#define IMX290_INCKSEL7					
IMX290_REG_8BIT(0x3480)
> 
>  #define IMX290_PGCTRL_REGEN				BIT(0)
>  #define IMX290_PGCTRL_THRU				BIT(1)
> @@ -178,11 +179,29 @@ struct imx290_model_info {
>  	enum imx290_colour_variant colour_variant;
>  };
> 
> +enum imx290_clk_freq {
> +	IMX290_CLK_37_125,
> +	IMX290_CLK_74_25,
> +	IMX290_NUM_CLK
> +};
> +
>  struct imx290_regval {
>  	u32 reg;
>  	u32 val;
>  };
> 
> +/*
> + * Clock configuration for registers INCKSEL1 to INCKSEL6.
> + */
> +struct imx290_clk_cfg {
> +	u8 incksel1;
> +	u8 incksel2;
> +	u8 incksel3;
> +	u8 incksel4;
> +	u8 incksel5;
> +	u8 incksel6;
> +};
> +
>  struct imx290_mode {
>  	u32 width;
>  	u32 height;
> @@ -192,6 +211,8 @@ struct imx290_mode {
> 
>  	const struct imx290_regval *data;
>  	u32 data_size;
> +
> +	const struct imx290_clk_cfg *clk_cfg;
>  };
> 
>  struct imx290_csi_cfg {
> @@ -210,6 +231,7 @@ struct imx290 {
>  	struct device *dev;
>  	struct clk *xclk;
>  	struct regmap *regmap;
> +	enum imx290_clk_freq xclk_idx;
>  	u8 nlanes;
>  	const struct imx290_model_info *model;
> 
> @@ -238,7 +260,6 @@ static inline struct imx290 *to_imx290(struct
> v4l2_subdev *_sd) */
> 
>  static const struct imx290_regval imx290_global_init_settings[] = {
> -	{ IMX290_EXTCK_FREQ, 0x2520 },
>  	{ IMX290_WINWV_OB, 12 },
>  	{ IMX290_WINPH, 0 },
>  	{ IMX290_WINPV, 0 },
> @@ -288,7 +309,18 @@ static const struct imx290_regval
> imx290_global_init_settings[] = { { IMX290_REG_8BIT(0x33b0), 0x50 },
>  	{ IMX290_REG_8BIT(0x33b2), 0x1a },
>  	{ IMX290_REG_8BIT(0x33b3), 0x04 },
> -	{ IMX290_REG_8BIT(0x3480), 0x49 },
> +};
> +
> +#define IMX290_NUM_CLK_REGS	2
> +static const struct imx290_regval xclk_regs[][IMX290_NUM_CLK_REGS] = {
> +	[IMX290_CLK_37_125] = {
> +		{ IMX290_EXTCK_FREQ, (37125 * 256) / 1000 },
> +		{ IMX290_INCKSEL7, 0x49 },
> +	},
> +	[IMX290_CLK_74_25] = {
> +		{ IMX290_EXTCK_FREQ, (74250 * 256) / 1000 },
> +		{ IMX290_INCKSEL7, 0x92 },
> +	},
>  };
> 
>  static const struct imx290_regval imx290_1080p_settings[] = {
> @@ -298,12 +330,6 @@ static const struct imx290_regval
> imx290_1080p_settings[] = { { IMX290_OPB_SIZE_V, 10 },
>  	{ IMX290_X_OUT_SIZE, 1920 },
>  	{ IMX290_Y_OUT_SIZE, 1080 },
> -	{ IMX290_INCKSEL1, 0x18 },
> -	{ IMX290_INCKSEL2, 0x03 },
> -	{ IMX290_INCKSEL3, 0x20 },
> -	{ IMX290_INCKSEL4, 0x01 },
> -	{ IMX290_INCKSEL5, 0x1a },
> -	{ IMX290_INCKSEL6, 0x1a },
>  };
> 
>  static const struct imx290_regval imx290_720p_settings[] = {
> @@ -313,12 +339,6 @@ static const struct imx290_regval
> imx290_720p_settings[] = { { IMX290_OPB_SIZE_V, 4 },
>  	{ IMX290_X_OUT_SIZE, 1280 },
>  	{ IMX290_Y_OUT_SIZE, 720 },
> -	{ IMX290_INCKSEL1, 0x20 },
> -	{ IMX290_INCKSEL2, 0x00 },
> -	{ IMX290_INCKSEL3, 0x20 },
> -	{ IMX290_INCKSEL4, 0x01 },
> -	{ IMX290_INCKSEL5, 0x1a },
> -	{ IMX290_INCKSEL6, 0x1a },
>  };
> 
>  static const struct imx290_regval imx290_10bit_settings[] = {
> @@ -424,6 +444,48 @@ static inline int imx290_link_freqs_num(const struct
> imx290 *imx290) return ARRAY_SIZE(imx290_link_freq_4lanes);
>  }
> 
> +static const struct imx290_clk_cfg imx290_1080p_clock_config[] = {
> +	[IMX290_CLK_37_125] = {
> +		/* 37.125MHz clock config */
> +		.incksel1 = 0x18,
> +		.incksel2 = 0x03,
> +		.incksel3 = 0x20,
> +		.incksel4 = 0x01,
> +		.incksel5 = 0x1a,
> +		.incksel6 = 0x1a,
> +	},
> +	[IMX290_CLK_74_25] = {
> +		/* 74.25MHz clock config */
> +		.incksel1 = 0x0c,
> +		.incksel2 = 0x03,
> +		.incksel3 = 0x10,
> +		.incksel4 = 0x01,
> +		.incksel5 = 0x1b,
> +		.incksel6 = 0x1b,
> +	},
> +};
> +
> +static const struct imx290_clk_cfg imx290_720p_clock_config[] = {
> +	[IMX290_CLK_37_125] = {
> +		/* 37.125MHz clock config */
> +		.incksel1 = 0x20,
> +		.incksel2 = 0x00,
> +		.incksel3 = 0x20,
> +		.incksel4 = 0x01,
> +		.incksel5 = 0x1a,
> +		.incksel6 = 0x1a,
> +	},
> +	[IMX290_CLK_74_25] = {
> +		/* 74.25MHz clock config */
> +		.incksel1 = 0x10,
> +		.incksel2 = 0x00,
> +		.incksel3 = 0x10,
> +		.incksel4 = 0x01,
> +		.incksel5 = 0x1b,
> +		.incksel6 = 0x1b,
> +	},
> +};
> +
>  /* Mode configs */
>  static const struct imx290_mode imx290_modes_2lanes[] = {
>  	{
> @@ -434,6 +496,7 @@ static const struct imx290_mode imx290_modes_2lanes[] =
> { .link_freq_index = FREQ_INDEX_1080P,
>  		.data = imx290_1080p_settings,
>  		.data_size = ARRAY_SIZE(imx290_1080p_settings),
> +		.clk_cfg = imx290_1080p_clock_config,
>  	},
>  	{
>  		.width = 1280,
> @@ -443,6 +506,7 @@ static const struct imx290_mode imx290_modes_2lanes[] =
> { .link_freq_index = FREQ_INDEX_720P,
>  		.data = imx290_720p_settings,
>  		.data_size = ARRAY_SIZE(imx290_720p_settings),
> +		.clk_cfg = imx290_720p_clock_config,
>  	},
>  };
> 
> @@ -455,6 +519,7 @@ static const struct imx290_mode imx290_modes_4lanes[] =
> { .link_freq_index = FREQ_INDEX_1080P,
>  		.data = imx290_1080p_settings,
>  		.data_size = ARRAY_SIZE(imx290_1080p_settings),
> +		.clk_cfg = imx290_1080p_clock_config,
>  	},
>  	{
>  		.width = 1280,
> @@ -464,6 +529,7 @@ static const struct imx290_mode imx290_modes_4lanes[] =
> { .link_freq_index = FREQ_INDEX_720P,
>  		.data = imx290_720p_settings,
>  		.data_size = ARRAY_SIZE(imx290_720p_settings),
> +		.clk_cfg = imx290_720p_clock_config,
>  	},
>  };
> 
> @@ -587,6 +653,26 @@ static int imx290_set_register_array(struct imx290
> *imx290, return 0;
>  }
> 
> +static int imx290_set_clock(struct imx290 *imx290)
> +{
> +	const struct imx290_mode *mode = imx290->current_mode;
> +	enum imx290_clk_freq clk_idx = imx290->xclk_idx;
> +	const struct imx290_clk_cfg *clk_cfg = &mode->clk_cfg[clk_idx];
> +	int ret;
> +
> +	ret = imx290_set_register_array(imx290, xclk_regs[clk_idx],
> +					IMX290_NUM_CLK_REGS);
> +
> +	imx290_write(imx290, IMX290_INCKSEL1, clk_cfg->incksel1, &ret);
> +	imx290_write(imx290, IMX290_INCKSEL2, clk_cfg->incksel2, &ret);
> +	imx290_write(imx290, IMX290_INCKSEL3, clk_cfg->incksel3, &ret);
> +	imx290_write(imx290, IMX290_INCKSEL4, clk_cfg->incksel4, &ret);
> +	imx290_write(imx290, IMX290_INCKSEL5, clk_cfg->incksel5, &ret);
> +	imx290_write(imx290, IMX290_INCKSEL6, clk_cfg->incksel6, &ret);
> +
> +	return ret;
> +}
> +
>  static int imx290_set_data_lanes(struct imx290 *imx290)
>  {
>  	int ret = 0;
> @@ -891,6 +977,13 @@ static int imx290_start_streaming(struct imx290
> *imx290, return ret;
>  	}
> 
> +	/* Set clock parameters based on mode and xclk */
> +	ret = imx290_set_clock(imx290);
> +	if (ret < 0) {
> +		dev_err(imx290->dev, "Could not set clocks\n");
> +		return ret;
> +	}
> +
>  	/* Set data lane count */
>  	ret = imx290_set_data_lanes(imx290);
>  	if (ret < 0) {
> @@ -1290,8 +1383,15 @@ static int imx290_init_clk(struct imx290 *imx290)
>  		return ret;
>  	}
> 
> -	/* external clock must be 37.125 MHz */
> -	if (xclk_freq != 37125000) {
> +	/* external clock must be 37.125 MHz or 74.25MHz */
> +	switch (xclk_freq) {
> +	case 37125000:
> +		imx290->xclk_idx = IMX290_CLK_37_125;
> +		break;
> +	case 74250000:
> +		imx290->xclk_idx = IMX290_CLK_74_25;
> +		break;
> +	default:
>  		dev_err(imx290->dev, "External clock frequency %u is not 
supported\n",
>  			xclk_freq);
>  		return -EINVAL;
Laurent Pinchart Feb. 7, 2023, 1:50 a.m. UTC | #2 
Hi Dave,

Thank you for the patch.

On Fri, Feb 03, 2023 at 07:18:09PM +0000, Dave Stevenson wrote:
> The sensor supports either a 37.125 or 74.25MHz external, but
> the driver only supported 37.125MHz.
> 
> Add the relevant register configuration for either clock
> frequency option.
> 
> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  drivers/media/i2c/imx290.c | 132 ++++++++++++++++++++++++++++++++-----
>  1 file changed, 116 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
> index a74930e86a6c..045d27b4d31b 100644
> --- a/drivers/media/i2c/imx290.c
> +++ b/drivers/media/i2c/imx290.c
> @@ -102,6 +102,7 @@
>  #define IMX290_TCLKPREPARE				IMX290_REG_16BIT(0x3452)
>  #define IMX290_TLPX					IMX290_REG_16BIT(0x3454)
>  #define IMX290_X_OUT_SIZE				IMX290_REG_16BIT(0x3472)
> +#define IMX290_INCKSEL7					IMX290_REG_8BIT(0x3480)
>  
>  #define IMX290_PGCTRL_REGEN				BIT(0)
>  #define IMX290_PGCTRL_THRU				BIT(1)
> @@ -178,11 +179,29 @@ struct imx290_model_info {
>  	enum imx290_colour_variant colour_variant;
>  };
>  
> +enum imx290_clk_freq {
> +	IMX290_CLK_37_125,
> +	IMX290_CLK_74_25,
> +	IMX290_NUM_CLK
> +};
> +
>  struct imx290_regval {
>  	u32 reg;
>  	u32 val;
>  };
>  
> +/*
> + * Clock configuration for registers INCKSEL1 to INCKSEL6.
> + */
> +struct imx290_clk_cfg {
> +	u8 incksel1;
> +	u8 incksel2;
> +	u8 incksel3;
> +	u8 incksel4;
> +	u8 incksel5;
> +	u8 incksel6;
> +};
> +
>  struct imx290_mode {
>  	u32 width;
>  	u32 height;
> @@ -192,6 +211,8 @@ struct imx290_mode {
>  
>  	const struct imx290_regval *data;
>  	u32 data_size;
> +
> +	const struct imx290_clk_cfg *clk_cfg;
>  };
>  
>  struct imx290_csi_cfg {
> @@ -210,6 +231,7 @@ struct imx290 {
>  	struct device *dev;
>  	struct clk *xclk;
>  	struct regmap *regmap;
> +	enum imx290_clk_freq xclk_idx;
>  	u8 nlanes;
>  	const struct imx290_model_info *model;
>  
> @@ -238,7 +260,6 @@ static inline struct imx290 *to_imx290(struct v4l2_subdev *_sd)
>   */
>  
>  static const struct imx290_regval imx290_global_init_settings[] = {
> -	{ IMX290_EXTCK_FREQ, 0x2520 },
>  	{ IMX290_WINWV_OB, 12 },
>  	{ IMX290_WINPH, 0 },
>  	{ IMX290_WINPV, 0 },
> @@ -288,7 +309,18 @@ static const struct imx290_regval imx290_global_init_settings[] = {
>  	{ IMX290_REG_8BIT(0x33b0), 0x50 },
>  	{ IMX290_REG_8BIT(0x33b2), 0x1a },
>  	{ IMX290_REG_8BIT(0x33b3), 0x04 },
> -	{ IMX290_REG_8BIT(0x3480), 0x49 },
> +};
> +
> +#define IMX290_NUM_CLK_REGS	2
> +static const struct imx290_regval xclk_regs[][IMX290_NUM_CLK_REGS] = {
> +	[IMX290_CLK_37_125] = {
> +		{ IMX290_EXTCK_FREQ, (37125 * 256) / 1000 },
> +		{ IMX290_INCKSEL7, 0x49 },
> +	},
> +	[IMX290_CLK_74_25] = {
> +		{ IMX290_EXTCK_FREQ, (74250 * 256) / 1000 },
> +		{ IMX290_INCKSEL7, 0x92 },
> +	},
>  };
>  
>  static const struct imx290_regval imx290_1080p_settings[] = {
> @@ -298,12 +330,6 @@ static const struct imx290_regval imx290_1080p_settings[] = {
>  	{ IMX290_OPB_SIZE_V, 10 },
>  	{ IMX290_X_OUT_SIZE, 1920 },
>  	{ IMX290_Y_OUT_SIZE, 1080 },
> -	{ IMX290_INCKSEL1, 0x18 },
> -	{ IMX290_INCKSEL2, 0x03 },
> -	{ IMX290_INCKSEL3, 0x20 },
> -	{ IMX290_INCKSEL4, 0x01 },
> -	{ IMX290_INCKSEL5, 0x1a },
> -	{ IMX290_INCKSEL6, 0x1a },
>  };
>  
>  static const struct imx290_regval imx290_720p_settings[] = {
> @@ -313,12 +339,6 @@ static const struct imx290_regval imx290_720p_settings[] = {
>  	{ IMX290_OPB_SIZE_V, 4 },
>  	{ IMX290_X_OUT_SIZE, 1280 },
>  	{ IMX290_Y_OUT_SIZE, 720 },
> -	{ IMX290_INCKSEL1, 0x20 },
> -	{ IMX290_INCKSEL2, 0x00 },
> -	{ IMX290_INCKSEL3, 0x20 },
> -	{ IMX290_INCKSEL4, 0x01 },
> -	{ IMX290_INCKSEL5, 0x1a },
> -	{ IMX290_INCKSEL6, 0x1a },
>  };
>  
>  static const struct imx290_regval imx290_10bit_settings[] = {
> @@ -424,6 +444,48 @@ static inline int imx290_link_freqs_num(const struct imx290 *imx290)
>  		return ARRAY_SIZE(imx290_link_freq_4lanes);
>  }
>  
> +static const struct imx290_clk_cfg imx290_1080p_clock_config[] = {
> +	[IMX290_CLK_37_125] = {
> +		/* 37.125MHz clock config */
> +		.incksel1 = 0x18,
> +		.incksel2 = 0x03,
> +		.incksel3 = 0x20,
> +		.incksel4 = 0x01,
> +		.incksel5 = 0x1a,
> +		.incksel6 = 0x1a,
> +	},
> +	[IMX290_CLK_74_25] = {
> +		/* 74.25MHz clock config */
> +		.incksel1 = 0x0c,
> +		.incksel2 = 0x03,
> +		.incksel3 = 0x10,
> +		.incksel4 = 0x01,
> +		.incksel5 = 0x1b,
> +		.incksel6 = 0x1b,
> +	},
> +};
> +
> +static const struct imx290_clk_cfg imx290_720p_clock_config[] = {
> +	[IMX290_CLK_37_125] = {
> +		/* 37.125MHz clock config */
> +		.incksel1 = 0x20,
> +		.incksel2 = 0x00,
> +		.incksel3 = 0x20,
> +		.incksel4 = 0x01,
> +		.incksel5 = 0x1a,
> +		.incksel6 = 0x1a,
> +	},
> +	[IMX290_CLK_74_25] = {
> +		/* 74.25MHz clock config */
> +		.incksel1 = 0x10,
> +		.incksel2 = 0x00,
> +		.incksel3 = 0x10,
> +		.incksel4 = 0x01,
> +		.incksel5 = 0x1b,
> +		.incksel6 = 0x1b,
> +	},
> +};
> +
>  /* Mode configs */
>  static const struct imx290_mode imx290_modes_2lanes[] = {
>  	{
> @@ -434,6 +496,7 @@ static const struct imx290_mode imx290_modes_2lanes[] = {
>  		.link_freq_index = FREQ_INDEX_1080P,
>  		.data = imx290_1080p_settings,
>  		.data_size = ARRAY_SIZE(imx290_1080p_settings),
> +		.clk_cfg = imx290_1080p_clock_config,
>  	},
>  	{
>  		.width = 1280,
> @@ -443,6 +506,7 @@ static const struct imx290_mode imx290_modes_2lanes[] = {
>  		.link_freq_index = FREQ_INDEX_720P,
>  		.data = imx290_720p_settings,
>  		.data_size = ARRAY_SIZE(imx290_720p_settings),
> +		.clk_cfg = imx290_720p_clock_config,
>  	},
>  };
>  
> @@ -455,6 +519,7 @@ static const struct imx290_mode imx290_modes_4lanes[] = {
>  		.link_freq_index = FREQ_INDEX_1080P,
>  		.data = imx290_1080p_settings,
>  		.data_size = ARRAY_SIZE(imx290_1080p_settings),
> +		.clk_cfg = imx290_1080p_clock_config,
>  	},
>  	{
>  		.width = 1280,
> @@ -464,6 +529,7 @@ static const struct imx290_mode imx290_modes_4lanes[] = {
>  		.link_freq_index = FREQ_INDEX_720P,
>  		.data = imx290_720p_settings,
>  		.data_size = ARRAY_SIZE(imx290_720p_settings),
> +		.clk_cfg = imx290_720p_clock_config,
>  	},
>  };
>  
> @@ -587,6 +653,26 @@ static int imx290_set_register_array(struct imx290 *imx290,
>  	return 0;
>  }
>  
> +static int imx290_set_clock(struct imx290 *imx290)
> +{
> +	const struct imx290_mode *mode = imx290->current_mode;
> +	enum imx290_clk_freq clk_idx = imx290->xclk_idx;
> +	const struct imx290_clk_cfg *clk_cfg = &mode->clk_cfg[clk_idx];
> +	int ret;
> +
> +	ret = imx290_set_register_array(imx290, xclk_regs[clk_idx],
> +					IMX290_NUM_CLK_REGS);
> +
> +	imx290_write(imx290, IMX290_INCKSEL1, clk_cfg->incksel1, &ret);
> +	imx290_write(imx290, IMX290_INCKSEL2, clk_cfg->incksel2, &ret);
> +	imx290_write(imx290, IMX290_INCKSEL3, clk_cfg->incksel3, &ret);
> +	imx290_write(imx290, IMX290_INCKSEL4, clk_cfg->incksel4, &ret);
> +	imx290_write(imx290, IMX290_INCKSEL5, clk_cfg->incksel5, &ret);
> +	imx290_write(imx290, IMX290_INCKSEL6, clk_cfg->incksel6, &ret);
> +
> +	return ret;
> +}
> +
>  static int imx290_set_data_lanes(struct imx290 *imx290)
>  {
>  	int ret = 0;
> @@ -891,6 +977,13 @@ static int imx290_start_streaming(struct imx290 *imx290,
>  		return ret;
>  	}
>  
> +	/* Set clock parameters based on mode and xclk */
> +	ret = imx290_set_clock(imx290);
> +	if (ret < 0) {
> +		dev_err(imx290->dev, "Could not set clocks\n");
> +		return ret;
> +	}
> +
>  	/* Set data lane count */
>  	ret = imx290_set_data_lanes(imx290);
>  	if (ret < 0) {
> @@ -1290,8 +1383,15 @@ static int imx290_init_clk(struct imx290 *imx290)
>  		return ret;
>  	}
>  
> -	/* external clock must be 37.125 MHz */
> -	if (xclk_freq != 37125000) {
> +	/* external clock must be 37.125 MHz or 74.25MHz */
> +	switch (xclk_freq) {
> +	case 37125000:
> +		imx290->xclk_idx = IMX290_CLK_37_125;
> +		break;
> +	case 74250000:
> +		imx290->xclk_idx = IMX290_CLK_74_25;
> +		break;
> +	default:
>  		dev_err(imx290->dev, "External clock frequency %u is not supported\n",
>  			xclk_freq);
>  		return -EINVAL;
diff mbox series

Patch

diff --git a/drivers/media/i2c/imx290.c b/drivers/media/i2c/imx290.c
index a74930e86a6c..045d27b4d31b 100644
--- a/drivers/media/i2c/imx290.c
+++ b/drivers/media/i2c/imx290.c
@@ -102,6 +102,7 @@ 
 #define IMX290_TCLKPREPARE				IMX290_REG_16BIT(0x3452)
 #define IMX290_TLPX					IMX290_REG_16BIT(0x3454)
 #define IMX290_X_OUT_SIZE				IMX290_REG_16BIT(0x3472)
+#define IMX290_INCKSEL7					IMX290_REG_8BIT(0x3480)
 
 #define IMX290_PGCTRL_REGEN				BIT(0)
 #define IMX290_PGCTRL_THRU				BIT(1)
@@ -178,11 +179,29 @@  struct imx290_model_info {
 	enum imx290_colour_variant colour_variant;
 };
 
+enum imx290_clk_freq {
+	IMX290_CLK_37_125,
+	IMX290_CLK_74_25,
+	IMX290_NUM_CLK
+};
+
 struct imx290_regval {
 	u32 reg;
 	u32 val;
 };
 
+/*
+ * Clock configuration for registers INCKSEL1 to INCKSEL6.
+ */
+struct imx290_clk_cfg {
+	u8 incksel1;
+	u8 incksel2;
+	u8 incksel3;
+	u8 incksel4;
+	u8 incksel5;
+	u8 incksel6;
+};
+
 struct imx290_mode {
 	u32 width;
 	u32 height;
@@ -192,6 +211,8 @@  struct imx290_mode {
 
 	const struct imx290_regval *data;
 	u32 data_size;
+
+	const struct imx290_clk_cfg *clk_cfg;
 };
 
 struct imx290_csi_cfg {
@@ -210,6 +231,7 @@  struct imx290 {
 	struct device *dev;
 	struct clk *xclk;
 	struct regmap *regmap;
+	enum imx290_clk_freq xclk_idx;
 	u8 nlanes;
 	const struct imx290_model_info *model;
 
@@ -238,7 +260,6 @@  static inline struct imx290 *to_imx290(struct v4l2_subdev *_sd)
  */
 
 static const struct imx290_regval imx290_global_init_settings[] = {
-	{ IMX290_EXTCK_FREQ, 0x2520 },
 	{ IMX290_WINWV_OB, 12 },
 	{ IMX290_WINPH, 0 },
 	{ IMX290_WINPV, 0 },
@@ -288,7 +309,18 @@  static const struct imx290_regval imx290_global_init_settings[] = {
 	{ IMX290_REG_8BIT(0x33b0), 0x50 },
 	{ IMX290_REG_8BIT(0x33b2), 0x1a },
 	{ IMX290_REG_8BIT(0x33b3), 0x04 },
-	{ IMX290_REG_8BIT(0x3480), 0x49 },
+};
+
+#define IMX290_NUM_CLK_REGS	2
+static const struct imx290_regval xclk_regs[][IMX290_NUM_CLK_REGS] = {
+	[IMX290_CLK_37_125] = {
+		{ IMX290_EXTCK_FREQ, (37125 * 256) / 1000 },
+		{ IMX290_INCKSEL7, 0x49 },
+	},
+	[IMX290_CLK_74_25] = {
+		{ IMX290_EXTCK_FREQ, (74250 * 256) / 1000 },
+		{ IMX290_INCKSEL7, 0x92 },
+	},
 };
 
 static const struct imx290_regval imx290_1080p_settings[] = {
@@ -298,12 +330,6 @@  static const struct imx290_regval imx290_1080p_settings[] = {
 	{ IMX290_OPB_SIZE_V, 10 },
 	{ IMX290_X_OUT_SIZE, 1920 },
 	{ IMX290_Y_OUT_SIZE, 1080 },
-	{ IMX290_INCKSEL1, 0x18 },
-	{ IMX290_INCKSEL2, 0x03 },
-	{ IMX290_INCKSEL3, 0x20 },
-	{ IMX290_INCKSEL4, 0x01 },
-	{ IMX290_INCKSEL5, 0x1a },
-	{ IMX290_INCKSEL6, 0x1a },
 };
 
 static const struct imx290_regval imx290_720p_settings[] = {
@@ -313,12 +339,6 @@  static const struct imx290_regval imx290_720p_settings[] = {
 	{ IMX290_OPB_SIZE_V, 4 },
 	{ IMX290_X_OUT_SIZE, 1280 },
 	{ IMX290_Y_OUT_SIZE, 720 },
-	{ IMX290_INCKSEL1, 0x20 },
-	{ IMX290_INCKSEL2, 0x00 },
-	{ IMX290_INCKSEL3, 0x20 },
-	{ IMX290_INCKSEL4, 0x01 },
-	{ IMX290_INCKSEL5, 0x1a },
-	{ IMX290_INCKSEL6, 0x1a },
 };
 
 static const struct imx290_regval imx290_10bit_settings[] = {
@@ -424,6 +444,48 @@  static inline int imx290_link_freqs_num(const struct imx290 *imx290)
 		return ARRAY_SIZE(imx290_link_freq_4lanes);
 }
 
+static const struct imx290_clk_cfg imx290_1080p_clock_config[] = {
+	[IMX290_CLK_37_125] = {
+		/* 37.125MHz clock config */
+		.incksel1 = 0x18,
+		.incksel2 = 0x03,
+		.incksel3 = 0x20,
+		.incksel4 = 0x01,
+		.incksel5 = 0x1a,
+		.incksel6 = 0x1a,
+	},
+	[IMX290_CLK_74_25] = {
+		/* 74.25MHz clock config */
+		.incksel1 = 0x0c,
+		.incksel2 = 0x03,
+		.incksel3 = 0x10,
+		.incksel4 = 0x01,
+		.incksel5 = 0x1b,
+		.incksel6 = 0x1b,
+	},
+};
+
+static const struct imx290_clk_cfg imx290_720p_clock_config[] = {
+	[IMX290_CLK_37_125] = {
+		/* 37.125MHz clock config */
+		.incksel1 = 0x20,
+		.incksel2 = 0x00,
+		.incksel3 = 0x20,
+		.incksel4 = 0x01,
+		.incksel5 = 0x1a,
+		.incksel6 = 0x1a,
+	},
+	[IMX290_CLK_74_25] = {
+		/* 74.25MHz clock config */
+		.incksel1 = 0x10,
+		.incksel2 = 0x00,
+		.incksel3 = 0x10,
+		.incksel4 = 0x01,
+		.incksel5 = 0x1b,
+		.incksel6 = 0x1b,
+	},
+};
+
 /* Mode configs */
 static const struct imx290_mode imx290_modes_2lanes[] = {
 	{
@@ -434,6 +496,7 @@  static const struct imx290_mode imx290_modes_2lanes[] = {
 		.link_freq_index = FREQ_INDEX_1080P,
 		.data = imx290_1080p_settings,
 		.data_size = ARRAY_SIZE(imx290_1080p_settings),
+		.clk_cfg = imx290_1080p_clock_config,
 	},
 	{
 		.width = 1280,
@@ -443,6 +506,7 @@  static const struct imx290_mode imx290_modes_2lanes[] = {
 		.link_freq_index = FREQ_INDEX_720P,
 		.data = imx290_720p_settings,
 		.data_size = ARRAY_SIZE(imx290_720p_settings),
+		.clk_cfg = imx290_720p_clock_config,
 	},
 };
 
@@ -455,6 +519,7 @@  static const struct imx290_mode imx290_modes_4lanes[] = {
 		.link_freq_index = FREQ_INDEX_1080P,
 		.data = imx290_1080p_settings,
 		.data_size = ARRAY_SIZE(imx290_1080p_settings),
+		.clk_cfg = imx290_1080p_clock_config,
 	},
 	{
 		.width = 1280,
@@ -464,6 +529,7 @@  static const struct imx290_mode imx290_modes_4lanes[] = {
 		.link_freq_index = FREQ_INDEX_720P,
 		.data = imx290_720p_settings,
 		.data_size = ARRAY_SIZE(imx290_720p_settings),
+		.clk_cfg = imx290_720p_clock_config,
 	},
 };
 
@@ -587,6 +653,26 @@  static int imx290_set_register_array(struct imx290 *imx290,
 	return 0;
 }
 
+static int imx290_set_clock(struct imx290 *imx290)
+{
+	const struct imx290_mode *mode = imx290->current_mode;
+	enum imx290_clk_freq clk_idx = imx290->xclk_idx;
+	const struct imx290_clk_cfg *clk_cfg = &mode->clk_cfg[clk_idx];
+	int ret;
+
+	ret = imx290_set_register_array(imx290, xclk_regs[clk_idx],
+					IMX290_NUM_CLK_REGS);
+
+	imx290_write(imx290, IMX290_INCKSEL1, clk_cfg->incksel1, &ret);
+	imx290_write(imx290, IMX290_INCKSEL2, clk_cfg->incksel2, &ret);
+	imx290_write(imx290, IMX290_INCKSEL3, clk_cfg->incksel3, &ret);
+	imx290_write(imx290, IMX290_INCKSEL4, clk_cfg->incksel4, &ret);
+	imx290_write(imx290, IMX290_INCKSEL5, clk_cfg->incksel5, &ret);
+	imx290_write(imx290, IMX290_INCKSEL6, clk_cfg->incksel6, &ret);
+
+	return ret;
+}
+
 static int imx290_set_data_lanes(struct imx290 *imx290)
 {
 	int ret = 0;
@@ -891,6 +977,13 @@  static int imx290_start_streaming(struct imx290 *imx290,
 		return ret;
 	}
 
+	/* Set clock parameters based on mode and xclk */
+	ret = imx290_set_clock(imx290);
+	if (ret < 0) {
+		dev_err(imx290->dev, "Could not set clocks\n");
+		return ret;
+	}
+
 	/* Set data lane count */
 	ret = imx290_set_data_lanes(imx290);
 	if (ret < 0) {
@@ -1290,8 +1383,15 @@  static int imx290_init_clk(struct imx290 *imx290)
 		return ret;
 	}
 
-	/* external clock must be 37.125 MHz */
-	if (xclk_freq != 37125000) {
+	/* external clock must be 37.125 MHz or 74.25MHz */
+	switch (xclk_freq) {
+	case 37125000:
+		imx290->xclk_idx = IMX290_CLK_37_125;
+		break;
+	case 74250000:
+		imx290->xclk_idx = IMX290_CLK_74_25;
+		break;
+	default:
 		dev_err(imx290->dev, "External clock frequency %u is not supported\n",
 			xclk_freq);
 		return -EINVAL;