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drm/xe/display: Match i915 driver suspend/resume sequences better 

Suspend fbdev sooner, and disable user access before suspending to
prevent some races. I've noticed this when comparing xe suspend to
i915's.

Matches the following commits from i915:
24b412b1bf ("drm/i915: Disable intel HPD poll after DRM poll init/enable")
1ef28d86be ("drm/i915: Suspend the framebuffer console earlier during system suspend")
bd738d859e ("drm/i915: Prevent modesets during driver init/shutdown")

Thanks to Imre for pointing me to those commits.

Driver shutdown is currently missing, but I have some idea how to
implement it next.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240806105044.596842-2-maarten.lankhorst@linux.intel.com
Signed-off-by: Maarten Lankhorst,,, <maarten.lankhorst@linux.intel.com>
pull/959/head
Maarten Lankhorst 2024-08-06 12:50:43 +02:00
parent 7116c35aac
commit 492be2a070
1 changed files with 14 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/gpu/drm/xe/display/xe_display.c
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@ -299,8 +299,11 @@ void xe_display_pm_suspend(struct xe_device *xe, bool runtime)
* properly.
*/
intel_power_domains_disable(xe);
if (has_display(xe))
intel_fbdev_set_suspend(&xe->drm, FBINFO_STATE_SUSPENDED, true);
if (has_display(xe)) {
drm_kms_helper_poll_disable(&xe->drm);
intel_display_driver_disable_user_access(xe);
}
if (!runtime)
intel_display_driver_suspend(xe);
@ -309,12 +312,13 @@ void xe_display_pm_suspend(struct xe_device *xe, bool runtime)
intel_hpd_cancel_work(xe);
if (has_display(xe))
intel_display_driver_suspend_access(xe);
intel_encoder_suspend_all(&xe->display);
intel_opregion_suspend(display, s2idle ? PCI_D1 : PCI_D3cold);
intel_fbdev_set_suspend(&xe->drm, FBINFO_STATE_SUSPENDED, true);
intel_dmc_suspend(xe);
}
@ -354,14 +358,19 @@ void xe_display_pm_resume(struct xe_device *xe, bool runtime)
intel_display_driver_init_hw(xe);
intel_hpd_init(xe);
if (has_display(xe))
intel_display_driver_resume_access(xe);
/* MST sideband requires HPD interrupts enabled */
intel_dp_mst_resume(xe);
if (!runtime)
intel_display_driver_resume(xe);
intel_hpd_poll_disable(xe);
if (has_display(xe))
if (has_display(xe)) {
drm_kms_helper_poll_enable(&xe->drm);
intel_display_driver_enable_user_access(xe);
}
intel_hpd_poll_disable(xe);
intel_opregion_resume(display);