linux-kernel - Re: [PATCH] Revert "drm/sun4i: Handle DRM_BUS_FLAG_PIXDATA

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Date:   Mon, 18 Jun 2018 10:27:06 +0200
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Cc:     dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        David Airlie <airlied@...ux.ie>, Chen-Yu Tsai <wens@...e.org>,
        linux-sunxi@...glegroups.com,
        Giulio Benetti <giulio.benetti@...ronovasrl.com>,
        stable@...r.kernel.org
Subject: Re: [PATCH] Revert "drm/sun4i: Handle DRM_BUS_FLAG_PIXDATA_*EDGE"

On Wed, Jun 13, 2018 at 10:16:47AM +0200, Paul Kocialkowski wrote:
> This reverts commit 2c17a4368aad2b88b68e4390c819e226cf320f70.
> 
> The offending commit triggers a run-time fault when accessing the panel
> element of the sun4i_tcon structure when no such panel is attached.
> 
> It was apparently assumed in said commit that a panel is always used with
> the TCON. Although it is often the case, this is not always true.
> For instance a bridge might be used instead of a panel.
> 
> This issue was discovered using an A13-OLinuXino, that uses the TCON
> in RGB mode for a simple DAC-based VGA bridge.
> 
> Cc: stable@...r.kernel.org
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>

Applied, thanks

Maxime

-- 
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

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