linux-kernel - Re: [PATCH 1/3] media: sun6i: Fix CSI regmap's max

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Message-ID: <20190204080113.77qxun2rhx6qnnzi@flea>
Date:   Mon, 4 Feb 2019 09:01:13 +0100
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Chen-Yu Tsai <wens@...e.org>
Cc:     Yong Deng <yong.deng@...ewell.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        linux-media@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 1/3] media: sun6i: Fix CSI regmap's max_register

On Mon, Feb 04, 2019 at 12:03:56AM +0800, Chen-Yu Tsai wrote:
> max_register is currently set to 0x1000. This is beyond the mapped
> address range of the hardware, so attempts to dump the regmap from
> debugfs would trigger a kernel exception.
> 
> Furthermore, the useful registers only occupy a small section at the
> beginning of the full range. Change the value to 0x9c, the last known
> register on the V3s and H3.
> 
> On the A31, the register range is extended to support additional
> capture channels. Since this is not yet supported, ignore it for now.
> 
> Fixes: 5cc7522d8965 ("media: sun6i: Add support for Allwinner CSI V3s")
> Cc: <stable@...r.kernel.org>
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>

Acked-by: Maxime Ripard <maxime.ripard@...tlin.com>

Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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