[PATCH] drm/amdgpu: limit VCN instance number to 1 for NAVY_FLOUNDER

[Guchun Chen]

VCN instance 1 is power gated permanently by SMU.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1743

Fixes: f6b6d7d6bc2d("drm/amdgpu/vcn: remove manual instance setting")
Signed-off-by: Guchun Chen <guchun.chen at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
index dbfd92984655..4848922667f2 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
@@ -103,6 +103,15 @@ static int vcn_v3_0_early_init(void *handle)
 			adev->vcn.num_enc_rings = 0;
 		else
 			adev->vcn.num_enc_rings = 2;
+
+		/*
+		 * Fix ME.
+		 * VCN instance number is limited to 1 for below ASIC due to
+		 * VCN instnace 1 is permanently power gated.
+		 */
+		if ((adev->ip_versions[UVD_HWIP][0] == IP_VERSION(3, 0, 0)) &&
+			(adev->ip_versions[GC_HWIP][0] == IP_VERSION(10, 3, 2)))
+			adev->vcn.num_vcn_inst = 1;
 	}
 
 	vcn_v3_0_set_dec_ring_funcs(adev);
-- 
2.17.1