[PATCH] drm/amdgpu: add missing cleanups for Polaris12 UVD/VCE on suspend

[Chen, Guchun]

[Public]

+Leo and James to review as well.

This patch is:
Acked-by: Guchun Chen <guchun.chen at amd.com>

Regards,
Guchun

-----Original Message-----
From: Quan, Evan <Evan.Quan at amd.com> 
Sent: Thursday, August 19, 2021 11:09 AM
To: amd-gfx at lists.freedesktop.org
Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Chen, Guchun <Guchun.Chen at amd.com>; Lazar, Lijo <Lijo.Lazar at amd.com>; Quan, Evan <Evan.Quan at amd.com>; Pan, Xinhui <Xinhui.Pan at amd.com>
Subject: [PATCH] drm/amdgpu: add missing cleanups for Polaris12 UVD/VCE on suspend

Perform proper cleanups on UVD/VCE suspend: powergate enablement, clockgating enablement and dpm disablement. This can fix some hangs observed on suspending when UVD/VCE still using(e.g. issue "pm-suspend" when video is still playing).

Change-Id: I36f39d9731e0a9638b52d5d92558b0ee9c23a9ed
Signed-off-by: Evan Quan <evan.quan at amd.com>
Signed-off-by: xinhui pan <xinhui.pan at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c | 24 ++++++++++++++++++++++++  drivers/gpu/drm/amd/amdgpu/vce_v3_0.c | 23 +++++++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
index 4eebf973a065..d0fc6ec18c29 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
@@ -554,6 +554,30 @@ static int uvd_v6_0_suspend(void *handle)
 	int r;
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
+	/*
+	 * Proper cleanups before halting the HW engine:
+	 *   - cancel the delayed idle work
+	 *   - enable powergating
+	 *   - enable clockgating
+	 *   - disable dpm
+	 *
+	 * TODO: to align with the VCN implementation, move the
+	 * jobs for clockgating/powergating/dpm setting to
+	 * ->set_powergating_state().
+	 */
+	cancel_delayed_work_sync(&adev->uvd.idle_work);
+
+	if (adev->pm.dpm_enabled) {
+		amdgpu_dpm_enable_uvd(adev, false);
+	} else {
+		amdgpu_asic_set_uvd_clocks(adev, 0, 0);
+		/* shutdown the UVD block */
+		amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_UVD,
+						       AMD_PG_STATE_GATE);
+		amdgpu_device_ip_set_clockgating_state(adev, AMD_IP_BLOCK_TYPE_UVD,
+						       AMD_CG_STATE_GATE);
+	}
+
 	r = uvd_v6_0_hw_fini(adev);
 	if (r)
 		return r;
diff --git a/drivers/gpu/drm/amd/amdgpu/vce_v3_0.c b/drivers/gpu/drm/amd/amdgpu/vce_v3_0.c
index 6d9108fa22e0..a594ade5d30a 100644
--- a/drivers/gpu/drm/amd/amdgpu/vce_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vce_v3_0.c
@@ -503,6 +503,29 @@ static int vce_v3_0_suspend(void *handle)
 	int r;
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
+	/*
+	 * Proper cleanups before halting the HW engine:
+	 *   - cancel the delayed idle work
+	 *   - enable powergating
+	 *   - enable clockgating
+	 *   - disable dpm
+	 *
+	 * TODO: to align with the VCN implementation, move the
+	 * jobs for clockgating/powergating/dpm setting to
+	 * ->set_powergating_state().
+	 */
+	cancel_delayed_work_sync(&adev->vce.idle_work);
+
+	if (adev->pm.dpm_enabled) {
+		amdgpu_dpm_enable_vce(adev, false);
+	} else {
+		amdgpu_asic_set_vce_clocks(adev, 0, 0);
+		amdgpu_device_ip_set_powergating_state(adev, AMD_IP_BLOCK_TYPE_VCE,
+						       AMD_PG_STATE_GATE);
+		amdgpu_device_ip_set_clockgating_state(adev, AMD_IP_BLOCK_TYPE_VCE,
+						       AMD_CG_STATE_GATE);
+	}
+
 	r = vce_v3_0_hw_fini(adev);
 	if (r)
 		return r;
--
2.29.0