linux-kernel - Re: [PATCH 0/2] drm: xlnx: zynqmp_kms: 16 bpp fixes for Xorg startup on AMD KV260

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Message-ID: <533168f1-1655-4947-9032-b08463f502d7@ideasonboard.com>
Date: Fri, 19 Dec 2025 13:59:14 +0200
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Mikko Rapeli <mikko.rapeli@...aro.org>, dri-devel@...ts.freedesktop.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Michal Simek <michal.simek@....com>, Bill Mills <bill.mills@...aro.org>,
 Ilias Apalodimas <ilias.apalodimas@...aro.org>
Subject: Re: [PATCH 0/2] drm: xlnx: zynqmp_kms: 16 bpp fixes for Xorg startup
 on AMD KV260

Hi Mikko,

On 05/12/2025 14:37, Mikko Rapeli wrote:
> Hi,
> 
> Currently on default yocto images Xorg fails to start on AMD KV260
> because 24/32 color depth gets detected but does not actually work.
> 
> These two patches fix the issue and now 16 bpp gets detected
> and Xorg starts and draws on external HDMI display using
> kernel.org based linux-yocto kernel.
> 
> Anatoliy Klymenko (1):
>   drm: xlnx: zynqmp_kms: Init fbdev with 16 bit color
> 
> Mikko Rapeli (1):
>   drm: xlnx: zynqmp_kms: set preferred_depth to 16 bpp
> 
>  drivers/gpu/drm/xlnx/zynqmp_kms.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 

Did you notice the few already sent serieses on the list where the topic
has been discussed?

[PATCH] drm: xlnx: zynqmp_dp: Support DRM_FORMAT_XRGB8888
[PATCH 0/3] drm: zynqmp: Make the video plane primary

Or is there something else on KV260 that messes up the 24 bit color?

 Tomi