Commit bf0365b0 authored by Antheas Kapenekakis's avatar Antheas Kapenekakis Committed by Mario Limonciello (AMD)
Browse files

drm: panel-backlight-quirks: Add Steam Deck brightness quirk 

On the SteamOS kernel, Valve universally makes minimum brightness 0
for all devices. SteamOS is (was?) meant for the Steam Deck, so
enabling it universally is reasonable. However, it causes issues in
certain devices. Therefore, introduce it just for the Steam Deck here.

SteamOS kernel does not have a public mirror, but this replaces commit
806dd74bb225 ("amd/drm: override backlight min value from 12 -> 0")
in the latest, as of this writing, SteamOS kernel (6.11.11-valve24).
See unofficial mirror reconstructed from sources below.

Link: https://gitlab.com/evlaV/linux-integration/-/commit/806dd74bb225


Reviewed-by: default avatarRobert Beckett <bob.beckett@collabora.com>
Reviewed-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Signed-off-by: default avatarAntheas Kapenekakis <lkml@antheas.dev>
Link: https://lore.kernel.org/r/20250829145541.512671-6-lkml@antheas.dev


Signed-off-by: default avatarMario Limonciello (AMD) <superm1@kernel.org>
parent aef10b11

drivers/gpu/drm/drm_panel_backlight_quirks.c

+15 −0
Original line number Diff line number Diff line
@@ -45,6 +45,21 @@ static const struct drm_get_panel_backlight_quirk drm_panel_min_backlight_quirks 
		.ident.name = "NE135A1M-NY1",

		.quirk = { .min_brightness = 1, },

	},

	/* Steam Deck models */

	{

		.dmi_match.field = DMI_SYS_VENDOR,

		.dmi_match.value = "Valve",

		.dmi_match_other.field = DMI_PRODUCT_NAME,

		.dmi_match_other.value = "Jupiter",

		.quirk = { .min_brightness = 1, },

	},

	{

		.dmi_match.field = DMI_SYS_VENDOR,

		.dmi_match.value = "Valve",

		.dmi_match_other.field = DMI_PRODUCT_NAME,

		.dmi_match_other.value = "Galileo",

		.quirk = { .min_brightness = 1, },

	},

	/* Have OLED Panels with brightness issue when last byte is 0/1 */

	{

		.dmi_match.field = DMI_SYS_VENDOR,