linux-kernel - Re: [PATCH v2] media: i2c: alvium: cleanup media bus formats

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Message-ID: <bfe25a26-fef3-4ab3-9ae2-ac9245fd5830@gmail.com>
Date: Thu, 11 Sep 2025 17:11:40 +0200
From: Martin Hecht <mhecht73@...il.com>
To: Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc: linux-media@...r.kernel.org, michael.roeder@...et.eu,
 martin.hecht@...et.eu, Tommaso Merciai <tomm.merciai@...il.com>,
 Mauro Carvalho Chehab <mchehab@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] media: i2c: alvium: cleanup media bus formats

Hi Sakari,


On 9/11/25 14:14, Sakari Ailus wrote:
> Hi Martin,
> 
> On Tue, Sep 09, 2025 at 03:59:37PM +0200, Martin Hecht wrote:
>> This patch removes MEDIA_BUS_FMT_RBG888_1X24 and MEDIA_BUS_FMT_BGR888_1X24
>> as of that formats are not supported by Alvium currently.
>> The missing and supported MEDIA_BUS_FMT_RGB565_1X16 has been added.
> 
> What's the pixel order used by the format in Alvium case?
> 

The Alvium has a fixed pixel order currently what should be BGR during 
transmission of any RGB format as described in MIPI-CSI2 spec 1.3. We 
tested with MEDIA_BUS_FMT_RGB888_1X24 as well as 
MEDIA_BUS_FMT_RGB888_3X8 for RGB24 in several SoCs like imx8mm, imx8mp 
and Xilinx CSI2RX subsystem on ZynqMP and Versal.
Does that answer your question?

BR Martin