linux-kernel - Re: [PATCH v6 1/7] gpu: ipu-v3: ipu-ic: Fix saturation bit offset in TPMEM

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Date:   Fri, 08 Mar 2019 11:24:02 +0100
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Steve Longerbeam <slongerbeam@...il.com>,
        linux-media@...r.kernel.org
Cc:     Tim Harvey <tharvey@...eworks.com>, stable@...r.kernel.org,
        "open list:DRM DRIVERS FOR FREESCALE IMX" 
        <dri-devel@...ts.freedesktop.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 1/7] gpu: ipu-v3: ipu-ic: Fix saturation bit offset
 in TPMEM

On Thu, 2019-03-07 at 15:33 -0800, Steve Longerbeam wrote:
> The saturation bit was being set at bit 9 in the second 32-bit word
> of the TPMEM CSC. This isn't correct, the saturation bit is bit 42,
> which is bit 10 of the second word.
> 
> Fixes: 1aa8ea0d2bd5d ("gpu: ipu-v3: Add Image Converter unit")
> 
> Signed-off-by: Steve Longerbeam <slongerbeam@...il.com>
> Cc: stable@...r.kernel.org
> ---
>  drivers/gpu/ipu-v3/ipu-ic.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/ipu-v3/ipu-ic.c b/drivers/gpu/ipu-v3/ipu-ic.c
> index 594c3cbc8291..18816ccf600e 100644
> --- a/drivers/gpu/ipu-v3/ipu-ic.c
> +++ b/drivers/gpu/ipu-v3/ipu-ic.c
> @@ -257,7 +257,7 @@ static int init_csc(struct ipu_ic *ic,
>  	writel(param, base++);
>  
>  	param = ((a[0] & 0x1fe0) >> 5) | (params->scale << 8) |
> -		(params->sat << 9);
> +		(params->sat << 10);
>  	writel(param, base++);
>  
>  	param = ((a[1] & 0x1f) << 27) | ((c[0][1] & 0x1ff) << 18) |

Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de>

regards
Philipp