[PATCH] drm/amd/display: Allow backlight to go below `AMDGPU_DM_DEFAULT_MIN_BACKLIGHT`
Mario Limonciello
superm1 at kernel.org
Sun Sep 15 19:28:37 UTC 2024
From: Mario Limonciello <mario.limonciello at amd.com>
The issue with panel power savings compatibility below
`AMDGPU_DM_DEFAULT_MIN_BACKLIGHT` happens at
`AMDGPU_DM_DEFAULT_MIN_BACKLIGHT` as well.
That issue will be fixed separately, so don't prevent the backlight
brightness from going that low.
Cc: Harry Wentland <harry.wentland at amd.com>
Cc: Thomas Weißschuh <linux at weissschuh.net>
Link: https://lore.kernel.org/amd-gfx/be04226a-a9e3-4a45-a83b-6d263c6557d8@t-8ch.de/T/#m400dee4e2fc61fe9470334d20a7c8c89c9aef44f
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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 ad66f09cd0bb..80b8594fcc33 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4449,7 +4449,7 @@ static void amdgpu_dm_update_backlight_caps(struct amdgpu_display_manager *dm,
int spread = caps.max_input_signal - caps.min_input_signal;
if (caps.max_input_signal > AMDGPU_DM_DEFAULT_MAX_BACKLIGHT ||
- caps.min_input_signal < AMDGPU_DM_DEFAULT_MIN_BACKLIGHT ||
+ caps.min_input_signal < 0 ||
spread > AMDGPU_DM_DEFAULT_MAX_BACKLIGHT ||
spread < AMDGPU_DM_MIN_SPREAD) {
DRM_DEBUG_KMS("DM: Invalid backlight caps: min=%d, max=%d\n",
--
2.43.0
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