[PATCH v5 07/10] drm/i915: plug the pm runtime handlers with PME HPD handling

[Vinod Govindapillai <vinod.govindapillai@intel.com>]

Runtime PM suspend routine should set the HPD can generate PME flag
if PME is enabled. This will avoid resetting the HPD IRQs during
IRQ reset on suspend and also avoid starting HPD polling. Then
during the early runtime PM resume call, the HPD can generate PME must
be cleared unconditionally. Plug the routines to set/clear the flags
based on pme capability to intel_display_driver_pm_runtime_suspend()
and intel_display_driver_pm_runtime_resume_early().

Assisted-by: GitHub_Copilot:claude-opus-5
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
---
 .../gpu/drm/i915/display/intel_display_driver.c  | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display_driver.c b/drivers/gpu/drm/i915/display/intel_display_driver.c
index 70d112fd4287..263eb3e08ea1 100644
--- a/drivers/gpu/drm/i915/display/intel_display_driver.c
+++ b/drivers/gpu/drm/i915/display/intel_display_driver.c
@@ -34,6 +34,7 @@
 #include "intel_display_driver.h"
 #include "intel_display_irq.h"
 #include "intel_display_power.h"
+#include "intel_display_rpm.h"
 #include "intel_display_types.h"
 #include "intel_display_utils.h"
 #include "intel_display_wa.h"
@@ -898,9 +899,17 @@ void intel_display_driver_runtime_pm_disable(struct intel_display *display)
 	intel_display_power_disable(display);
 }
 
+static void intel_display_driver_pm_runtime_set_pme(struct intel_display *display)
+{
+	bool pme_enabled = intel_display_rpm_pme_enabled(display);
+
+	intel_hpd_set_pme_capable(display, pme_enabled);
+}
+
 /* before irq suspend */
 void intel_display_driver_pm_runtime_suspend(struct intel_display *display)
 {
+	intel_display_driver_pm_runtime_set_pme(display);
 }
 
 /* after irq suspend */
@@ -935,9 +944,16 @@ void intel_display_driver_pm_runtime_suspend_late(struct intel_display *display)
 		intel_hpd_poll_enable(display);
 }
 
+static void intel_display_driver_pm_runtime_clear_pme(struct intel_display *display)
+{
+	intel_hpd_set_pme_capable(display, false);
+}
+
 /* before irq resume */
 void intel_display_driver_pm_runtime_resume_early(struct intel_display *display)
 {
+	intel_display_driver_pm_runtime_clear_pme(display);
+
 	intel_opregion_notify_adapter(display, PCI_D0);
 
 	intel_display_power_runtime_resume(display);
-- 
2.43.0