[PATCH] drm/amd/display: Align num_crtc to max_streams

[Tianci Yin]

From: tiancyin <tianci.yin at amd.com>

[Why]
Display pipe might be harvested on some SKUs, that cause the
adev->mode_info.num_crtc mismatch with the usable crtc number,
then below error dmesgs observed after GPU recover.

  *ERROR* amdgpu_dm_set_crtc_irq_state: crtc is NULL at id :3
  *ERROR* amdgpu_dm_set_crtc_irq_state: crtc is NULL at id :3
  *ERROR* amdgpu_dm_set_crtc_irq_state: crtc is NULL at id :3
  *ERROR* amdgpu_dm_set_pflip_irq_state: crtc is NULL at id :3
  *ERROR* amdgpu_dm_set_pflip_irq_state: crtc is NULL at id :3
  *ERROR* amdgpu_dm_set_pflip_irq_state: crtc is NULL at id :3
  *ERROR* amdgpu_dm_set_pflip_irq_state: crtc is NULL at id :3
  *ERROR* amdgpu_dm_set_vupdate_irq_state: crtc is NULL at id :3
  *ERROR* amdgpu_dm_set_vupdate_irq_state: crtc is NULL at id :3
  *ERROR* amdgpu_dm_set_vupdate_irq_state: crtc is NULL at id :3

[How]
The max_streams is limited number after pipe fuse, align num_crtc
to max_streams to eliminate the error logs.

Signed-off-by: tiancyin <tianci.yin at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index b31cfda30ff9..87ec2574cc09 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4285,6 +4285,9 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
 		break;
 	}
 
+	/* Adjust the crtc number according to the DCN pipe fuse. */
+	adev->mode_info.num_crtc = dm->dc->caps.max_streams;
+
 	for (i = 0; i < dm->dc->caps.max_streams; i++)
 		if (amdgpu_dm_crtc_init(dm, mode_info->planes[i], i)) {
 			DRM_ERROR("KMS: Failed to initialize crtc\n");
-- 
2.34.1