From: Andrey Grodzovsky Date: Fri, 31 Mar 2017 18:15:31 +0000 (-0400) Subject: drm/amd/display: Fix s3 hang on resume. X-Git-Tag: v4.15-rc1~56^2~23^2~593 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=9faa423716b17b0c9ba92fd12737968de6918d88;p=linux.git drm/amd/display: Fix s3 hang on resume. Avoid enabling CRTC_VERTICAL_INTERRUPT0 twice on resume. It's enabled once from within manage_dm_interrupts in mode set and another explicitly from amdgpu_dm_irq_resume_late. Seems it lead to CRTC hang. Signed-off-by: Andrey Grodzovsky Acked-by: Harry Wentland Reviewed-by: Andrey Grodzovsky Signed-off-by: Alex Deucher --- 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 1077af91884f..30148b4eabae 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -575,7 +575,7 @@ int amdgpu_dm_display_resume(struct amdgpu_device *adev ) ret = drm_atomic_helper_resume(ddev, adev->dm.cached_state); - amdgpu_dm_irq_resume(adev); + amdgpu_dm_irq_resume_late(adev); return ret; } diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c index 682e9c3ad8e5..4aee146a848f 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c @@ -504,8 +504,11 @@ int amdgpu_dm_irq_suspend( DRM_DEBUG_KMS("DM_IRQ: suspend\n"); - /* disable HW interrupt */ - for (src = DC_IRQ_SOURCE_HPD1; src < DAL_IRQ_SOURCES_NUMBER; src++) { + /** + * Disable HW interrupt for HPD and HPDRX only since FLIP and VBLANK + * will be disabled from manage_dm_interrupts on disable CRTC. + */ + for (src = DC_IRQ_SOURCE_HPD1; src < DC_IRQ_SOURCE_HPD6RX; src++) { hnd_list_l = &adev->dm.irq_handler_list_low_tab[src].head; hnd_list_h = &adev->dm.irq_handler_list_high_tab[src]; if (!list_empty(hnd_list_l) || !list_empty(hnd_list_h)) @@ -544,7 +547,7 @@ int amdgpu_dm_irq_resume_early(struct amdgpu_device *adev) return 0; } -int amdgpu_dm_irq_resume(struct amdgpu_device *adev) +int amdgpu_dm_irq_resume_late(struct amdgpu_device *adev) { int src; struct list_head *hnd_list_h, *hnd_list_l; @@ -554,8 +557,11 @@ int amdgpu_dm_irq_resume(struct amdgpu_device *adev) DRM_DEBUG_KMS("DM_IRQ: resume\n"); - /* re-enable HW interrupt */ - for (src = DC_IRQ_SOURCE_HPD1; src < DAL_IRQ_SOURCES_NUMBER; src++) { + /** + * Renable HW interrupt for HPD and only since FLIP and VBLANK + * will be enabled from manage_dm_interrupts on enable CRTC. + */ + for (src = DC_IRQ_SOURCE_HPD1; src < DC_IRQ_SOURCE_HPD6; src++) { hnd_list_l = &adev->dm.irq_handler_list_low_tab[src].head; hnd_list_h = &adev->dm.irq_handler_list_high_tab[src]; if (!list_empty(hnd_list_l) || !list_empty(hnd_list_h)) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.h index 9339861c8897..9d3007634266 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.h @@ -117,6 +117,6 @@ int amdgpu_dm_irq_suspend(struct amdgpu_device *adev); * */ int amdgpu_dm_irq_resume_early(struct amdgpu_device *adev); -int amdgpu_dm_irq_resume(struct amdgpu_device *adev); +int amdgpu_dm_irq_resume_late(struct amdgpu_device *adev); #endif /* __AMDGPU_DM_IRQ_H__ */