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author	Alex Deucher <alexander.deucher@amd.com>
	Thu, 8 Mar 2018 14:56:01 +0000 (09:56 -0500)
committer	Alex Deucher <alexander.deucher@amd.com>
	Wed, 14 Mar 2018 20:08:40 +0000 (15:08 -0500)
commit	a59b3c80fd0041223ccf720504974a543b81b1d0
tree	a882f3883661b92385cc0d1365c4ba6f9497754f	tree \| snapshot
parent	0660b58c9038f5ef94b8fe33716449945ea786e5	commit \| diff

drm/amdgpu: save/restore backlight level in legacy dce code

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>

John Crispins staging tree

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drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h		diff \| blob \| history
drivers/gpu/drm/amd/amdgpu/atombios_encoders.c		diff \| blob \| history
drivers/gpu/drm/amd/amdgpu/atombios_encoders.h		diff \| blob \| history
drivers/gpu/drm/amd/amdgpu/dce_v10_0.c		diff \| blob \| history
drivers/gpu/drm/amd/amdgpu/dce_v11_0.c		diff \| blob \| history
drivers/gpu/drm/amd/amdgpu/dce_v6_0.c		diff \| blob \| history
drivers/gpu/drm/amd/amdgpu/dce_v8_0.c		diff \| blob \| history