openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/radeon: 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>
This commit is contained in:
Alex Deucher 2016-06-01 12:20:16 -04:00
parent d85555f885
commit cf26f9081f
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpu/drm/radeon/radeon_atpx_handler.c
View File

@ -182,6 +182,11 @@ static int radeon_atpx_validate(struct radeon_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;