[PATCH 3/4] drm/amdgpu: Init the cp MQD if it's not be initialized before

[shaoyunl]

The MQD might not be initialized duirng first init period if the device need to be reset
druing probe. Driver need to proper init them in gpu recovery period

Signed-off-by: shaoyunl <shaoyun.liu at amd.com>
Acked-by: Alex Deucher <alexander.deucher at amd.com>
Change-Id: Iad58a050939af2afa46d1c74a90866c47ba9efd2
---
 drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 65db88bb6cbc..bfe1aaa0418f 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -3696,11 +3696,18 @@ static int gfx_v9_0_kiq_init_queue(struct amdgpu_ring *ring)
 	struct amdgpu_device *adev = ring->adev;
 	struct v9_mqd *mqd = ring->mqd_ptr;
 	int mqd_idx = AMDGPU_MAX_COMPUTE_RINGS;
+	struct v9_mqd *tmp_mqd;
 
 	gfx_v9_0_kiq_setting(ring);
 
-	if (amdgpu_in_reset(adev)) { /* for GPU_RESET case */
-		/* reset MQD to a clean status */
+	/* GPU could be in bad state during probe, driver trigger the reset
+	 * after load the SMU, in this case , the mqd is not be initialized.
+	 * driver need to re-init the mqd.
+	 * check mqd->cp_hqd_pq_control since this value should not be 0
+	 */
+	tmp_mqd = (struct v9_mqd *)adev->gfx.mec.mqd_backup[mqd_idx];
+	if (amdgpu_in_reset(adev) && tmp_mqd->cp_hqd_pq_control){
+		/* for GPU_RESET case , reset MQD to a clean status */
 		if (adev->gfx.mec.mqd_backup[mqd_idx])
 			memcpy(mqd, adev->gfx.mec.mqd_backup[mqd_idx], sizeof(struct v9_mqd_allocation));
 
@@ -3736,8 +3743,15 @@ static int gfx_v9_0_kcq_init_queue(struct amdgpu_ring *ring)
 	struct amdgpu_device *adev = ring->adev;
 	struct v9_mqd *mqd = ring->mqd_ptr;
 	int mqd_idx = ring - &adev->gfx.compute_ring[0];
+	struct v9_mqd *tmp_mqd;
 
-	if (!amdgpu_in_reset(adev) && !adev->in_suspend) {
+	/* Same as above kiq init, driver need to re-init the mqd if mqd->cp_hqd_pq_control
+	 * is not be initialized before
+	 */
+	tmp_mqd = (struct v9_mqd *)adev->gfx.mec.mqd_backup[mqd_idx];
+
+	if (!tmp_mqd->cp_hqd_pq_control ||
+	    (!amdgpu_in_reset(adev) && !adev->in_suspend)) {
 		memset((void *)mqd, 0, sizeof(struct v9_mqd_allocation));
 		((struct v9_mqd_allocation *)mqd)->dynamic_cu_mask = 0xFFFFFFFF;
 		((struct v9_mqd_allocation *)mqd)->dynamic_rb_mask = 0xFFFFFFFF;
-- 
2.17.1