linux-kernel - [PATCH v1 0/5] drm: panel-backlight-quirks: Do partial refactor and apply OLED fix

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Message-ID: <20250824200202.1744335-1-lkml@antheas.dev>
Date: Sun, 24 Aug 2025 22:01:57 +0200
From: Antheas Kapenekakis <lkml@...heas.dev>
To: amd-gfx@...ts.freedesktop.org
Cc: dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	philm@...jaro.org,
	Alex Deucher <alexander.deucher@....com>,
	Christian König <christian.koenig@....com>,
	Mario Limonciello <mario.limonciello@....com>,
	Antheas Kapenekakis <lkml@...heas.dev>
Subject: [PATCH v1 0/5] drm: panel-backlight-quirks: Do partial refactor and
 apply OLED fix

This is an alternative to [1], since Phil found out there are still invalid
values. I made this series before the one I sent today, and I have to say
I tested it much less. Because I did not think it was very viable to
upstream. I was also not aware of [2] and [3] since they are not in a
public bug tracker such as amddrm and my issue there [4] remains closed.

I lower the cc'd here since this is a draft. But this could have some
viability. Especially since I can stop carrying the dodgy patches from
SteamOS so that the SD OLED has a 0 brightness min.

[1] https://lore.kernel.org/all/20250824085351.454619-2-lkml@antheas.dev/
[2] https://gitlab.manjaro.org/packages/core/linux616/-/blob/master/0001-drm-amd-display-Add-a-quirk-for-the-Zotac-Zone.patch
[3] https://gitlab.manjaro.org/packages/core/linux616/-/blob/master/0004-TEMPORARY-terrible-hack-for-zotac-screen-while-debug.patch
[4] https://gitlab.freedesktop.org/drm/amd/-/issues/3803

Antheas Kapenekakis (5):
  drm: panel-backlight-quirks: Make ident optional
  drm: panel-backlight-quirks: Convert brightness quirk to generic
    structure
  drm: panel-backlight-quirks: Add secondary DMI match
  drm: panel-backlight-quirks: Add brightness mask quirk
  drm: panel-backlight-quirks: Add Steam Decks

 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |  19 +++-
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |   6 +
 .../link/protocols/link_edp_panel_control.c   |   2 +-
 drivers/gpu/drm/drm_panel_backlight_quirks.c  | 106 +++++++++++++-----
 include/drm/drm_utils.h                       |   8 +-
 5 files changed, 109 insertions(+), 32 deletions(-)


base-commit: c17b750b3ad9f45f2b6f7e6f7f4679844244f0b9
-- 
2.50.1