linux-kernel - Re: [PATCH] Enable MIPI filtering by DT on i.MX8M*

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Message-ID: <65670a02-e217-4d0f-955d-d13ca0240819@armadeus.com>
Date: Fri, 23 May 2025 17:34:01 +0200
From: Sébastien Szymanski <sebastien.szymanski@...adeus.com>
To: Krzysztof Hałasa <khalasa@...p.pl>,
 Jacopo Mondi <jacopo.mondi@...asonboard.com>
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Rui Miguel Silva <rmfrfs@...il.com>, Martin Kepplinger <martink@...teo.de>,
 Purism Kernel Team <kernel@...i.sm>,
 Mauro Carvalho Chehab <mchehab@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>, linux-media@...r.kernel.org,
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Enable MIPI filtering by DT on i.MX8M*

Hello,

On 5/23/25 11:58 AM, Krzysztof Hałasa wrote:
> Now, what do we do with it?
> Is anybody able to verify the CSIC version register value on i.MX8MM?
> Something like devmem read32 0x32E50000 (or 0x32E40000 for CSI1) WHILE
> RUNNING CAPTURE on that very CSI would do the trick (using your
> favorite instance of devmem/devmem2/etc). Alternatively one could add
> a debug printk to the csic module.

On i.MX8MM mipi_csi is at 32e30000. NXP kernel (6.12.3) with ov5640 camera:

# devmem 0x32E30000 32
0x03060301

Regards,

-- 
Sébastien Szymanski, Armadeus Systems
Software engineer