Commit 63088da9 authored Nov 06, 2018 by Alex Deucher

Revert "drm/amd/display: set backlight level limit to 1"

This reverts commit 0cafc82f.

This breaks some apps that assume 0 is minimum brightness.

Revert for 4.20.  This is fixed properly for drm-next/4.21 in:
"drm/amd: Don't fail on backlight = 0"
However, that patch depends on more extensive changes to the
backlight interface which are too invasive for -fixes.

Fixes: Bugzilla: https://bugs.freedesktop.org/108668


Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent 86a484bd

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+0 −7

Original line number	Diff line number	Diff line
		@@ -1524,13 +1524,6 @@ static int amdgpu_dm_backlight_update_status(struct backlight_device *bd)
		{
		struct amdgpu_display_manager *dm = bl_get_data(bd);

		/*
		* PWM interperts 0 as 100% rather than 0% because of HW
		* limitation for level 0.So limiting minimum brightness level
		* to 1.
		*/
		if (bd->props.brightness < 1)
		return 1;
		if (dc_link_set_backlight_level(dm->backlight_link,
		bd->props.brightness, 0, 0))
		return 0;

Admin message