[PATCH] drm/amdgpu: disable runtime pm on several sienna cichlid cards(v2)

[Guchun Chen]

Disable runtime power management on several sienna cichlid
cards, otherwise SMU will possibly fail to be resumed from
runtime suspend. Will drop this after a clean solution between
kernel driver and SMU FW is available.

amdgpu 0000:63:00.0: amdgpu: GECC is enabled
amdgpu 0000:63:00.0: amdgpu: SECUREDISPLAY: securedisplay ta ucode is not available
amdgpu 0000:63:00.0: amdgpu: SMU is resuming...
amdgpu 0000:63:00.0: amdgpu: SMU: I'm not done with your command: SMN_C2PMSG_66:0x0000000E SMN_C2PMSG_82:0x00000080
amdgpu 0000:63:00.0: amdgpu: Failed to SetDriverDramAddr!
amdgpu 0000:63:00.0: amdgpu: Failed to setup smc hw!
[drm:amdgpu_device_ip_resume_phase2 [amdgpu]] *ERROR* resume of IP block <smu> failed -62
amdgpu 0000:63:00.0: amdgpu: amdgpu_device_ip_resume failed (-62)

v2: seperate to a function.

Signed-off-by: Guchun Chen <guchun.chen at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 262938f0dfdb..1bf8ff71b6b5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -43,6 +43,17 @@
 #include "amdgpu_display.h"
 #include "amdgpu_ras.h"
 
+static void amdgpu_runtime_pm_quirk(struct amdgpu_device *adev)
+{
+	/*
+	 * Add below quirk on several sienna_cichlid cards to disable
+	 * runtime pm to fix EMI failures.
+	 */
+	if (((adev->pdev->device == 0x73A1) && (adev->pdev->revision == 0x00)) ||
+	    ((adev->pdev->device == 0x73BF) && (adev->pdev->revision == 0xCF)))
+		adev->runpm = false;
+}
+
 void amdgpu_unregister_gpu_instance(struct amdgpu_device *adev)
 {
 	struct amdgpu_gpu_instance *gpu_instance;
@@ -180,6 +191,9 @@ int amdgpu_driver_load_kms(struct amdgpu_device *adev, unsigned long flags)
 		 */
 		if (adev->is_fw_fb)
 			adev->runpm = false;
+
+		amdgpu_runtime_pm_quirk(adev);
+
 		if (adev->runpm)
 			dev_info(adev->dev, "Using BACO for runtime pm\n");
 	}
-- 
2.17.1