From b5e3241316973b9f01228d2fa5b8b2bb157d44aa Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Thu, 8 Mar 2018 09:56:01 -0500
Subject: drm/amdgpu: save/restore backlight level in legacy dce code
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Save/restore the backlight level scratch register in S3/S4 so the
backlight level comes back at the previously requested level.
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=199047
Fixes: 4ec6ecf48c64d (drm/amdgpu: drop scratch regs save and restore from S3/S4 handling)
Acked-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 1 +
1 file changed, 1 insertion(+)
(limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h')
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index 54f06c959340..2264c5c97009 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -352,6 +352,7 @@ struct amdgpu_mode_info {
u16 firmware_flags;
/* pointer to backlight encoder */
struct amdgpu_encoder *bl_encoder;
+ u8 bl_level; /* saved backlight level */
struct amdgpu_audio audio; /* audio stuff */
int num_crtc; /* number of crtcs */
int num_hpd; /* number of hpd pins */
--
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