linux-kernel - Re: [PATCH 2/2] media: i2c: ds90ub960: Fix PLL config for 1200 MHz CSI rate

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Date:   Fri, 4 Aug 2023 00:43:52 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Hans Verkuil <hverkuil@...all.nl>, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] media: i2c: ds90ub960: Fix PLL config for 1200 MHz
 CSI rate

Hi Tomi,

Thank you for the patch.

On Thu, Aug 03, 2023 at 11:41:39AM +0300, Tomi Valkeinen wrote:
> smatch reports:
> 
> drivers/media/i2c/ds90ub960.c:1788 ub960_init_tx_ports() error: uninitialized symbol 'pll_div'.
> 
> This is caused by 'pll_div' not being set for 1200 MHz CSI rate. Set the
> 'pll_div' correctly.

I'm surprised gcc didn't catch it.

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

> Fixes: afe267f2d368 ("media: i2c: add DS90UB960 driver")
> Reported-by: Hans Verkuil <hverkuil@...all.nl>
> Closes: https://lore.kernel.org/all/8d6daeb1-b62a-bbb2-b840-8759c84f2085@xs4all.nl/
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> ---
>  drivers/media/i2c/ds90ub960.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/media/i2c/ds90ub960.c b/drivers/media/i2c/ds90ub960.c
> index 4833b39b9178..4ab45e326d80 100644
> --- a/drivers/media/i2c/ds90ub960.c
> +++ b/drivers/media/i2c/ds90ub960.c
> @@ -1763,6 +1763,7 @@ static int ub960_init_tx_ports(struct ub960_data *priv)
>  		break;
>  	case MHZ(1200):
>  		speed_select = 1;
> +		pll_div = 0x18;
>  		break;
>  	case MHZ(800):
>  		speed_select = 2;
> 

-- 
Regards,

Laurent Pinchart