[Intel-gfx] [PATCH 29/42] drm/i915/xe2lpd: Add support for HPD

[Lucas De Marchi]

From: Gustavo Sousa <gustavo.sousa at intel.com>

Hotplug setup for Xe2_LPD differs from Xe_LPD+ by the fact that the
extra programming for hotplug inversion and DDI HPD filter duration is
not necessary anymore. As mtp_hpd_irq_setup() is reasonably small,
prefer to fork it into a new function for Xe2_LPD instead of adding a
platform check.

BSpec: 68970
Signed-off-by: Gustavo Sousa <gustavo.sousa at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 .../gpu/drm/i915/display/intel_hotplug_irq.c  | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_hotplug_irq.c b/drivers/gpu/drm/i915/display/intel_hotplug_irq.c
index f76b9deb64b4..74aea0d8d9ae 100644
--- a/drivers/gpu/drm/i915/display/intel_hotplug_irq.c
+++ b/drivers/gpu/drm/i915/display/intel_hotplug_irq.c
@@ -163,7 +163,9 @@ static void intel_hpd_init_pins(struct drm_i915_private *dev_priv)
 	    (!HAS_PCH_SPLIT(dev_priv) || HAS_PCH_NOP(dev_priv)))
 		return;
 
-	if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1)
+	if (INTEL_PCH_TYPE(dev_priv) >= PCH_LNL)
+		hpd->pch_hpd = hpd_mtp;
+	else if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1)
 		hpd->pch_hpd = hpd_sde_dg1;
 	else if (INTEL_PCH_TYPE(dev_priv) >= PCH_MTP)
 		hpd->pch_hpd = hpd_mtp;
@@ -1061,6 +1063,19 @@ static void mtp_hpd_irq_setup(struct drm_i915_private *i915)
 	mtp_tc_hpd_detection_setup(i915);
 }
 
+static void xe2lpd_sde_hpd_irq_setup(struct drm_i915_private *i915)
+{
+	u32 hotplug_irqs, enabled_irqs;
+
+	enabled_irqs = intel_hpd_enabled_irqs(i915, i915->display.hotplug.pch_hpd);
+	hotplug_irqs = intel_hpd_hotplug_irqs(i915, i915->display.hotplug.pch_hpd);
+
+	ibx_display_interrupt_update(i915, hotplug_irqs, enabled_irqs);
+
+	mtp_ddi_hpd_detection_setup(i915);
+	mtp_tc_hpd_detection_setup(i915);
+}
+
 static bool is_xelpdp_pica_hpd_pin(enum hpd_pin hpd_pin)
 {
 	return hpd_pin >= HPD_PORT_TC1 && hpd_pin <= HPD_PORT_TC4;
@@ -1120,6 +1135,8 @@ static void xelpdp_hpd_irq_setup(struct drm_i915_private *i915)
 
 	xelpdp_pica_hpd_detection_setup(i915);
 
+	if (INTEL_PCH_TYPE(i915) >= PCH_LNL)
+		xe2lpd_sde_hpd_irq_setup(i915);
 	if (INTEL_PCH_TYPE(i915) >= PCH_MTP)
 		mtp_hpd_irq_setup(i915);
 }
-- 
2.40.1