Commit fb8cc331 authored by Prike Liang's avatar Prike Liang Committed by Alex Deucher
Browse files

drm/amdgpu: keep mmhub clock gating being enabled during s2idle suspend 



Without MMHUB clock gating being enabled then MMHUB will not disconnect
from DF and will result in DF C-state entry can't be accessed during S2idle
suspend, and eventually s0ix entry will be blocked.

Signed-off-by: default avatarPrike Liang <Prike.Liang@amd.com>
Acked-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent a71849cd

drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c

+10 −0
Original line number Diff line number Diff line
@@ -1151,6 +1151,16 @@ static int gmc_v10_0_set_clockgating_state(void *handle, 
	int r;

	struct amdgpu_device *adev = (struct amdgpu_device *)handle;



	/*

	 * The issue mmhub can't disconnect from DF with MMHUB clock gating being disabled

	 * is a new problem observed at DF 3.0.3, however with the same suspend sequence not

	 * seen any issue on the DF 3.0.2 series platform.

	 */

	if (adev->in_s0ix && adev->ip_versions[DF_HWIP][0] > IP_VERSION(3, 0, 2)) {

		dev_dbg(adev->dev, "keep mmhub clock gating being enabled for s0ix\n");

		return 0;

	}



	r = adev->mmhub.funcs->set_clockgating(adev, state);

	if (r)

		return r;