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authorAlex Deucher <alexander.deucher@amd.com>2021-07-21 18:11:51 -0400
committerAlex Deucher <alexander.deucher@amd.com>2021-07-27 12:47:39 -0400
commitf2ad3accefc63e72e9932e141c21875cc04beec8 (patch)
tree2d43c8d6fde186cfe60c9e41f6ba1e0463720a2d /MAINTAINERS
parentb53e041d8e4308f7324999398aec092dbcb130f5 (diff)
drm/amdgpu/display: only enable aux backlight control for OLED panels
We've gotten a number of reports about backlight control not working on panels which indicate that they use aux backlight control. A recent patch: commit 2d73eabe2984a435737498ab39bb1500a9ffe9a9 Author: Camille Cho <Camille.Cho@amd.com> Date: Thu Jul 8 18:28:37 2021 +0800 drm/amd/display: Only set default brightness for OLED [Why] We used to unconditionally set backlight path as AUX for panels capable of backlight adjustment via DPCD in set default brightness. [How] This should be limited to OLED panel only since we control backlight via PWM path for SDR mode in LCD HDR panel. Reviewed-by: Krunoslav Kovac <krunoslav.kovac@amd.com> Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by: Camille Cho <Camille.Cho@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Changes some other code to only use aux for backlight control on OLED panels. The commit message seems to indicate that PWM should be used for SDR mode on HDR panels. Do something similar for backlight control in general. This may need to be revisited if and when HDR started to get used. Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1438 Bug: https://bugzilla.kernel.org/show_bug.cgi?id=213715 Reviewed-by: Roman Li <Roman.Li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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