drm/amd/display: Write default Vesa Aux backlight control in dmub

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[WHY]
Some OLED panels require driver to write Aux BL before link training or
turning on backlight; otherwise monitor brightness will change.

[HOW]
Write the default Vesa Aux backlight control in dmub.

Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Derek Lai <Derek.Lai@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Derek Lai 2025-10-31 10:58:52 +08:00 • committed by Alex Deucher

parent 201648dc81

commit 08f133e932

5 changed files with 28 additions and 8 deletions

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2

drivers/gpu/drm/amd/display/dc/link/link_detection.c

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4

drivers/gpu/drm/amd/display/dc/link/link_dpms.c

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2

drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c

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26

drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c

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2

drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.h

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