linux-kernel - Re: [PATCH v2 1/8] media: i2c: ds90ub960: Configure CSI-2 continuous clock

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Message-ID: <20230725162913.GH31069@pendragon.ideasonboard.com>
Date:   Tue, 25 Jul 2023 19:29:13 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Luca Ceresoli <luca.ceresoli@...tlin.com>,
        Andy Shevchenko <andriy.shevchenko@...el.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Hans Verkuil <hverkuil@...all.nl>,
        Satish Nagireddy <satish.nagireddy@...cruise.com>,
        Matti Vaittinen <mazziesaccount@...il.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/8] media: i2c: ds90ub960: Configure CSI-2 continuous
 clock

Hi Tomi,

Thank you for the patch.

On Thu, Jul 20, 2023 at 01:30:32PM +0300, Tomi Valkeinen wrote:
> Use 'clock-noncontinuous' from DT to configure the
> continuous/non-continuous clock setting for the TX ports.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>

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

> ---
>  drivers/media/i2c/ds90ub960.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/media/i2c/ds90ub960.c b/drivers/media/i2c/ds90ub960.c
> index b9a1ef63629b..a83091f47140 100644
> --- a/drivers/media/i2c/ds90ub960.c
> +++ b/drivers/media/i2c/ds90ub960.c
> @@ -149,6 +149,7 @@
>  
>  #define UB960_TR_CSI_CTL			0x33
>  #define UB960_TR_CSI_CTL_CSI_CAL_EN		BIT(6)
> +#define UB960_TR_CSI_CTL_CSI_CONTS_CLOCK	BIT(1)
>  #define UB960_TR_CSI_CTL_CSI_ENABLE		BIT(0)
>  
>  #define UB960_TR_CSI_CTL2			0x34
> @@ -485,6 +486,7 @@ struct ub960_txport {
>  	u8                      nport;	/* TX port number, and index in priv->txport[] */
>  
>  	u32 num_data_lanes;
> +	bool non_continous_clk;
>  };
>  
>  struct ub960_data {
> @@ -1133,6 +1135,9 @@ static int ub960_parse_dt_txport(struct ub960_data *priv,
>  		goto err_free_txport;
>  	}
>  
> +	txport->non_continous_clk = vep.bus.mipi_csi2.flags &
> +				    V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
> +
>  	txport->num_data_lanes = vep.bus.mipi_csi2.num_data_lanes;
>  
>  	if (vep.nr_of_link_frequencies != 1) {
> @@ -1744,6 +1749,9 @@ static void ub960_init_tx_port(struct ub960_data *priv,
>  
>  	csi_ctl |= (4 - txport->num_data_lanes) << 4;
>  
> +	if (!txport->non_continous_clk)
> +		csi_ctl |= UB960_TR_CSI_CTL_CSI_CONTS_CLOCK;
> +
>  	ub960_txport_write(priv, nport, UB960_TR_CSI_CTL, csi_ctl);
>  }
>  

-- 
Regards,

Laurent Pinchart