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So, hook up > support by trying to reload DMUB firmware if > drm_atomic_helper_wait_for_flip_done() fails. Also, send out a wedged > event if the firmware reload fails. > > Signed-off-by: Hamza Mahfooz > --- > v2: send a wedged event instead of attempting a GPU reset. > v3: read return value of drm_atomic_helper_wait_for_flip_done(). > v4: only send wedged event if firmware reload fails and send out "fake" > page flip completes. > --- > .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 24 +++++++++++++++++-- > 1 file changed, 22 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 7c51d8d7e73c..0ae6ada22fb0 100644 > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > @@ -87,6 +87,7 @@ > #include > #include > #include > +#include > #include > #include > #include > @@ -10829,6 +10830,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state) > struct drm_connector_state *old_con_state = NULL, *new_con_state = NULL; > struct dm_crtc_state *dm_old_crtc_state, *dm_new_crtc_state; > int crtc_disable_count = 0; > + struct amdgpu_crtc *acrtc; > > trace_amdgpu_dm_atomic_commit_tail_begin(state); > > @@ -11085,8 +11087,26 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state) > /* Signal HW programming completion */ > drm_atomic_helper_commit_hw_done(state); > > - if (wait_for_vblank) > - drm_atomic_helper_wait_for_flip_done(dev, state); > + if (wait_for_vblank && > + drm_atomic_helper_wait_for_flip_done(dev, state)) { > + mutex_lock(&dm->dc_lock); > + if (dm_dmub_hw_init(adev)) >From Michel's explanation that is pretty much a no-go because it potentially causes other atomic commits to react in unforeseen ways. > + drm_dev_wedged_event(dev, DRM_WEDGE_RECOVERY_REBIND | > + DRM_WEDGE_RECOVERY_BUS_RESET, > + NULL); Please completely drop that. This here is a sledge hammer and not going to fly anywhere. > + mutex_unlock(&dm->dc_lock); > + > + spin_lock_irqsave(&dev->event_lock, flags); > + drm_for_each_crtc(crtc, dev) { This should go over only the CRTCs in the atomic commit currently handled. Have you tried sending a hotplug event for the connectors in question as Michel suggested? Regards, Christian. > + if (acrtc->event) { > + drm_crtc_send_vblank_event(crtc, acrtc->event); > + acrtc->event = NULL; > + drm_crtc_vblank_put(crtc); > + acrtc->pflip_status = AMDGPU_FLIP_NONE; > + } > + } > + spin_unlock_irqrestore(&dev->event_lock, flags); > + } > > drm_atomic_helper_cleanup_planes(dev, state); >