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drm/amdgpu: work around lack of upstream ACPI support for D3cold 

Until Dave's patch to support the new hybrid gfx ACPI method goes
upstream, we can fallback to the old ATPX method which seems to
still work.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2016-06-03 17:06:18 -04:00
parent 1974e30eb1
commit c63695cc5e
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
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@ -200,7 +200,16 @@ static int amdgpu_atpx_validate(struct amdgpu_atpx *atpx)
atpx->is_hybrid = false;
if (valid_bits & ATPX_MS_HYBRID_GFX_SUPPORTED) {
printk("ATPX Hybrid Graphics\n");
#if 1
/* This is a temporary hack until the D3 cold support
* makes it upstream. The ATPX power_control method seems
* to still work on even if the system should be using
* the new standardized hybrid D3 cold ACPI interface.
*/
atpx->functions.power_cntl = true;
#else
atpx->functions.power_cntl = false;
#endif
atpx->is_hybrid = true;
}