linux-kernel - Re: [PATCH v7] rockchip/rga: v4l2 m2m support

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Date:   Mon, 21 Aug 2017 16:16:39 +0200
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Jacob Chen <jacob-chen@...wrt.com>,
        linux-rockchip@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        heiko@...ech.de, mchehab@...nel.org, linux-media@...r.kernel.org,
        laurent.pinchart+renesas@...asonboard.com, hans.verkuil@...co.com,
        tfiga@...omium.org, nicolas@...fresne.ca
Subject: Re: [PATCH v7] rockchip/rga: v4l2 m2m support

Hi Jacob,

On 08/03/2017 07:23 AM, Jacob Chen wrote:
> Rockchip RGA is a separate 2D raster graphic acceleration unit. It
> accelerates 2D graphics operations, such as point/line drawing, image
> scaling, rotation, BitBLT, alpha blending and image blur/sharpness
> 
> The drvier is mostly based on s5p-g2d v4l2 m2m driver
> And supports various operations from the rendering pipeline.
>  - copy
>  - fast solid color fill
>  - rotation
>  - flip
>  - alpha blending
> 
> The code in rga-hw.c is used to configure regs according to operations
> The code in rga-buf.c is used to create private mmu table for RGA.
> 
> changes in V7:
> - fix some warning reported by "checkpatch --strict"
> 
> Signed-off-by: Jacob Chen <jacob-chen@...wrt.com>

Can you post the v4l2-compliance output? I gather that there is at least one
colorspace-related error that appears to be a v4l2-compliance bug, so I'd
like to see the exact error it gives. I'll see if I can fix it so this driver
has a clean compliance output.

I apologize that this driver probably won't make 4.14. Too much to review...

I hope to do the v7 review within a week.

Regards,

	Hans