linux-kernel - [PATCH 0/4] Add "activ bpc" drm property and use it in AMD and Intel driver

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Date:   Fri,  4 Jun 2021 19:17:19 +0200
From:   Werner Sembach <wse@...edocomputers.com>
To:     harry.wentland@....com, sunpeng.li@....com,
        alexander.deucher@....com, christian.koenig@....com,
        airlied@...ux.ie, daniel@...ll.ch,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        tzimmermann@...e.de, jani.nikula@...ux.intel.com,
        joonas.lahtinen@...ux.intel.com, rodrigo.vivi@...el.com,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org
Subject: [PATCH 0/4] Add "activ bpc" drm property and use it in AMD and Intel driver

I started work on my proposal for better color handling in Linux display
drivers: https://lkml.org/lkml/2021/5/12/764

Since the first read-only property is now implemented for amdgpu and i915 I
wanted to collect some feedback, since the other two read-only properties will
be quite similar, I hope.

I have already commited the first patch in this series independently as it fixes
a function already in use.

The actuall update of the values is implemented in patch three and four in the
atomic_commit_tail() function of amdgpu and i915 respectifly. It does get
updated more often than needed with the current approach, but without harm since
just the same value is written again. A check if the update is required would be
the same amount of computation. Let me know if you know a better place to put
the update than attomic_commit_tail().