blob: 8097f887e5ccdba32aa89cb1a852134e190c342a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
From 3cbabbaf7928478a00d200fbbd8c4bfa36c1efcd Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 6 Nov 2018 16:06:32 -0500
Subject: [PATCH 0767/2940] Revert "drm/amd/display: set backlight level limit
to 1"
This reverts commit 0cafc82fae41531b0162150f9a97f2c74f97118f.
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>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 4372ea9e5aaf..492793722654 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1579,11 +1579,6 @@ static int amdgpu_dm_backlight_update_status(struct backlight_device *bd)
*/
uint32_t brightness = bd->props.brightness * 0x101;
- /*
- * 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)
brightness = 0x101;
--
2.17.1
|
