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

This reverts commit 0cafc82fae.

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>
This commit is contained in:
Alex Deucher 2018-11-06 16:06:32 -05:00
parent 86a484bda7
commit 63088da947
1 changed files with 0 additions and 7 deletions
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7
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -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;