[PATCH] drm/amdgpu: Don't halt RLC on GFX suspend

[Zhang, Hawking]

[AMD Official Use Only]

Good catch.
Reviewed-by: Hawking Zhang <Hawking.Zhang at amd.com>

Regards,
Hawking
-----Original Message-----
From: Lazar, Lijo <Lijo.Lazar at amd.com> 
Sent: Monday, November 29, 2021 16:12
To: amd-gfx at lists.freedesktop.org
Cc: Zhang, Hawking <Hawking.Zhang at amd.com>; Deucher, Alexander <Alexander.Deucher at amd.com>; Yang, Stanley <Stanley.Yang at amd.com>; Clements, John <John.Clements at amd.com>; Zhou1, Tao <Tao.Zhou1 at amd.com>
Subject: [PATCH] drm/amdgpu: Don't halt RLC on GFX suspend

On aldebaran, RLC also controls GFXCLK. Skip halting RLC during GFX IP suspend and keep it running till PMFW disables all DPMs.

    [  578.019986] amdgpu 0000:23:00.0: amdgpu: GPU reset begin!
    [  583.245566] amdgpu 0000:23:00.0: amdgpu: Failed to disable smu features.
    [  583.245621] amdgpu 0000:23:00.0: amdgpu: Fail to disable dpm features!
    [  583.245639] [drm:amdgpu_device_ip_suspend_phase2 [amdgpu]] *ERROR* suspend of IP block <smu> failed -62
    [  583.248504] [drm] free PSP TMR buffer

Signed-off-by: Lijo Lazar <lijo.lazar at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c     | 7 ++++---
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 34478bcc4d09..b305fd39874f 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -4060,9 +4060,10 @@ static int gfx_v9_0_hw_fini(void *handle)
 
 	gfx_v9_0_cp_enable(adev, false);
 
-	/* Skip suspend with A+A reset */
-	if (adev->gmc.xgmi.connected_to_cpu && amdgpu_in_reset(adev)) {
-		dev_dbg(adev->dev, "Device in reset. Skipping RLC halt\n");
+	/* Skip stopping RLC with A+A reset or when RLC controls GFX clock */
+	if ((adev->gmc.xgmi.connected_to_cpu && amdgpu_in_reset(adev)) ||
+	    (adev->ip_versions[GC_HWIP][0] >= IP_VERSION(9, 4, 2))) {
+		dev_dbg(adev->dev, "Skipping RLC halt\n");
 		return 0;
 	}
 
diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index ea99afb38d2b..5839918cb574 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -1474,7 +1474,7 @@ static int smu_disable_dpms(struct smu_context *smu)
 			dev_err(adev->dev, "Failed to disable smu features.\n");
 	}
 
-	if (adev->ip_versions[GC_HWIP][0] >= IP_VERSION(10, 0, 0) &&
+	if (adev->ip_versions[GC_HWIP][0] >= IP_VERSION(9, 4, 2) &&
 	    adev->gfx.rlc.funcs->stop)
 		adev->gfx.rlc.funcs->stop(adev);
 
--
2.25.1