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.
Signed-off-by: Alex Deucher alexander.deucher@amd.com --- drivers/gpu/drm/radeon/radeon_atpx_handler.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/radeon/radeon_atpx_handler.c b/drivers/gpu/drm/radeon/radeon_atpx_handler.c index 95f4fea..3e24fe0 100644 --- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c +++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c @@ -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;