1 files changed, 44 insertions, 2 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c b/drivers/gpu/drm/amd/amdgpu/nv.c
index 1d785f06c79d..b9722282d1b8 100644
--- a/drivers/gpu/drm/amd/amdgpu/nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/nv.c
@@ -335,6 +335,38 @@ static int nv_asic_mode1_reset(struct amdgpu_device *adev)
 	return ret;
 }
 
+static int nv_asic_mode2_reset(struct amdgpu_device *adev)
+{
+	u32 i;
+	int ret = 0;
+
+	amdgpu_atombios_scratch_regs_engine_hung(adev, true);
+
+	/* disable BM */
+	pci_clear_master(adev->pdev);
+
+	amdgpu_device_cache_pci_state(adev->pdev);
+
+	ret = amdgpu_dpm_mode2_reset(adev);
+	if (ret)
+		dev_err(adev->dev, "GPU mode2 reset failed\n");
+
+	amdgpu_device_load_pci_state(adev->pdev);
+
+	/* wait for asic to come out of reset */
+	for (i = 0; i < adev->usec_timeout; i++) {
+		u32 memsize = adev->nbio.funcs->get_memsize(adev);
+
+		if (memsize != 0xffffffff)
+			break;
+		udelay(1);
+	}
+
+	amdgpu_atombios_scratch_regs_engine_hung(adev, false);
+
+	return ret;
+}
+
 static bool nv_asic_supports_baco(struct amdgpu_device *adev)
 {
 	struct smu_context *smu = &adev->smu;
@@ -351,6 +383,7 @@ nv_asic_reset_method(struct amdgpu_device *adev)
 	struct smu_context *smu = &adev->smu;
 
 	if (amdgpu_reset_method == AMD_RESET_METHOD_MODE1 ||
+	    amdgpu_reset_method == AMD_RESET_METHOD_MODE2 ||
 	    amdgpu_reset_method == AMD_RESET_METHOD_BACO)
 		return amdgpu_reset_method;
 
@@ -359,6 +392,8 @@ nv_asic_reset_method(struct amdgpu_device *adev)
 				  amdgpu_reset_method);
 
 	switch (adev->asic_type) {
+	case CHIP_VANGOGH:
+		return AMD_RESET_METHOD_MODE2;
 	case CHIP_SIENNA_CICHLID:
 	case CHIP_NAVY_FLOUNDER:
 	case CHIP_DIMGREY_CAVEFISH:
@@ -376,7 +411,8 @@ static int nv_asic_reset(struct amdgpu_device *adev)
 	int ret = 0;
 	struct smu_context *smu = &adev->smu;
 
-	if (nv_asic_reset_method(adev) == AMD_RESET_METHOD_BACO) {
+	switch (nv_asic_reset_method(adev)) {
+	case AMD_RESET_METHOD_BACO:
 		dev_info(adev->dev, "BACO reset\n");
 
 		ret = smu_baco_enter(smu);
@@ -385,9 +421,15 @@ static int nv_asic_reset(struct amdgpu_device *adev)
 		ret = smu_baco_exit(smu);
 		if (ret)
 			return ret;
-	} else {
+		break;
+	case AMD_RESET_METHOD_MODE2:
+		dev_info(adev->dev, "MODE2 reset\n");
+		ret = nv_asic_mode2_reset(adev);
+		break;
+	default:
 		dev_info(adev->dev, "MODE1 reset\n");
 		ret = nv_asic_mode1_reset(adev);
+		break;
 	}
 
 	return ret;