Re: [PATCH] drm/amd/display: fix dm irq error message in gpu recover

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On 2/8/23 09:26, Alex Deucher wrote:
On Wed, Feb 8, 2023 at 2:26 AM Tianci Yin <tianci.yin@xxxxxxx> wrote:

From: tiancyin <tianci.yin@xxxxxxx>

[Why]
Variable adev->crtc_irq.num_types was initialized as the value of
adev->mode_info.num_crtc at early_init stage, later at hw_init stage,
the num_crtc changed due to the display pipe harvest on some SKUs,
but the num_types was not updated accordingly, that cause below error
in 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]
Defer the initialization of num_types to eliminate the error logs.

Signed-off-by: tiancyin <tianci.yin@xxxxxxx>

Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>

This seems to be the right thing to do.

Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>

Harry


---
  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

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..506699c0d316 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4226,6 +4226,8 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
         /* Update the actual used number of crtc */
         adev->mode_info.num_crtc = adev->dm.display_indexes_num;

+       amdgpu_dm_set_irq_funcs(adev);
+
         link_cnt = dm->dc->caps.max_links;
         if (amdgpu_dm_mode_config_init(dm->adev)) {
                 DRM_ERROR("DM: Failed to initialize mode config\n");
@@ -4714,8 +4716,6 @@ static int dm_early_init(void *handle)
                 break;
         }

-       amdgpu_dm_set_irq_funcs(adev);
-
         if (adev->mode_info.funcs == NULL)
                 adev->mode_info.funcs = &dm_display_funcs;

--
2.34.1




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