linux-kernel - Re: [PATCH v2 04/12] drm/rockchip: vop2: clear afbc en and transform bit for cluster window at linear mode

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Message-ID: <ebe46d19-954d-4dbb-82ba-a443058e9f4e@rock-chips.com>
Date:   Tue, 28 Nov 2023 16:03:46 +0800
From:   Andy Yan <andy.yan@...k-chips.com>
To:     Heiko Stübner <heiko@...ech.de>,
        Andy Yan <andyshrk@....com>
Cc:     hjc@...k-chips.com, dri-devel@...ts.freedesktop.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        devicetree@...r.kernel.org, sebastian.reichel@...labora.com,
        kever.yang@...k-chips.com, chris.obbard@...labora.com,
        s.hauer@...gutronix.de
Subject: Re: [PATCH v2 04/12] drm/rockchip: vop2: clear afbc en and transform
 bit for cluster window at linear mode

Hi Heiko:

On 11/27/23 23:02, Heiko Stübner wrote:
> Am Mittwoch, 22. November 2023, 13:54:25 CET schrieb Andy Yan:
>> From: Andy Yan <andy.yan@...k-chips.com>
>>
>> The enable bit and transform offset of cluster windows should be
>> cleared when it work at linear mode, or we may have a iommu fault
>> issue.
>>
>> Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
> I guess same here?
>
> Fixes: 604be85547ce ("drm/rockchip: Add VOP2 driver")

I'm not sure if we need a Fixes tag here,  in fact this issue never happens on

rk3566/8 , because the cluster windows of rk356x only support afbc format,

they don't have a chance to switch between afbc and linear mode.

Of course, the lack support of linear mode of rk356x cluster windows is a thoughtless

of IC design, if it really support both afbc and linear format, we indeed need this fix.

The situation is the same as patch 03/12.

So I hope follow your advice, if it need a Fixes tag here.

>
>
>
>
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip

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