linux-kernel - Re: [PATCH v2] drm/amd/display: Add pixel encoding info to debugfs

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Message-ID: <1XiLpoWd2E_COrHNl9BYkmCXkUKK6Bv1wibdFxiw3Vi6AQOPAIhrIMPNEZmmKAp9yxC8Er4DEMqOqjshMgRqtpV3UkS7MN2OjCsDjllvdRE=@emersion.fr>
Date: Wed, 22 May 2024 13:40:36 +0000
From: Simon Ser <contact@...rsion.fr>
To: Mario Limonciello <mario.limonciello@....com>
Cc: Rino André Johnsen <rinoandrejohnsen@...il.com>, Christian König <christian.koenig@....com>, alexander.deucher@....com, Harry Wentland <harry.wentland@....com>, Leo Li <sunpeng.li@....com>, Rodrigo Siqueira <Rodrigo.Siqueira@....com>, "Pan, Xinhui" <Xinhui.Pan@....com>, David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, Aurabindo Pillai <aurabindo.pillai@....com>, Hersen Wu <hersenxs.wu@....com>, Hamza Mahfooz <hamza.mahfooz@....com>, Wayne Lin <wayne.lin@....com>, Srinivasan Shanmugam <srinivasan.shanmugam@....com>, Fangzhi Zuo <jerry.zuo@....com>, Tom Chung <chiahsuan.chung@....com>, Nicholas Kazlauskas <nicholas.kazlauskas@....com>, amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] drm/amd/display: Add pixel encoding info to debugfs

On Wednesday, May 22nd, 2024 at 15:36, Mario Limonciello <mario.limonciello@....com> wrote:

> > To be perfectly honest with you, I haven't given that much though. I
> > used the 'bpc' and 'colorspace' property in debugfs, since I could not
> > find that information anywhere else. And since I also needed to verify
> > the pixel encoding being used, I added it where those other values
> > were. That made for a simple and easy addition for this property.
> > 
> > If you want me to do this differently, let me know. And please point
> > me to the standardized DRM property where I should expose the values.

FWIW, there is a patch from Andri to add a similar (?) property:
https://lore.kernel.org/dri-devel/20240115160554.720247-1-andri@yngvason.is/

The patch also allows user-space to set the "pixel encoding".