Commit 5c614792 authored Jun 01, 2016 by Alex Deucher

drm/amdgpu: disable power control on hybrid laptops



Windows 10 (and some 8.1) systems use standardized
ACPI calls for hybrid laptops to control dGPU power.
Detect those cases and disable the AMD specific ATPX
power control.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent 662ce7bc

drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -183,6 +183,11 @@ static int amdgpu_atpx_validate(struct amdgpu_atpx *atpx)
		ATPX_DFP_SIGNAL_MUXED))
		atpx->functions.disp_mux_cntl = true;

		if (valid_bits & ATPX_MS_HYBRID_GFX_SUPPORTED) {
		printk("Hybrid Graphics, ATPX dGPU power cntl disabled\n");
		atpx->functions.power_cntl = false;
		}

		kfree(info);
		}
		return 0;