[PATCH 19/20] drm/i915: Warn when display irq functions is executed when display is disabled

[José Roberto de Souza <jose.souza@xxxxxxxxx>]

With previous patches any of this warnings shows up but lets add then
so any other patch that breaks that can be caught by CI tests.

Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_irq.c      | 14 ++++++++++++++
 drivers/gpu/drm/i915/intel_hotplug.c |  2 ++
 2 files changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index cb82f56cd7dc..f785ec61fea8 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2511,6 +2511,8 @@ static void ilk_display_irq_handler(struct drm_i915_private *dev_priv,
 	enum pipe pipe;
 	u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG;
 
+	WARN_ON_ONCE(!INTEL_INFO(dev_priv)->num_pipes);
+
 	if (hotplug_trigger)
 		ilk_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_ilk);
 
@@ -2557,6 +2559,8 @@ static void ivb_display_irq_handler(struct drm_i915_private *dev_priv,
 	enum pipe pipe;
 	u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG_IVB;
 
+	WARN_ON_ONCE(!INTEL_INFO(dev_priv)->num_pipes);
+
 	if (hotplug_trigger)
 		ilk_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_ivb);
 
@@ -2725,6 +2729,8 @@ gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
 	u32 iir;
 	enum pipe pipe;
 
+	WARN_ON_ONCE(!INTEL_INFO(dev_priv)->num_pipes);
+
 	if (master_ctl & GEN8_DE_MISC_IRQ) {
 		iir = I915_READ(GEN8_DE_MISC_IIR);
 		if (iir) {
@@ -3867,6 +3873,8 @@ static void spt_hpd_irq_setup(struct drm_i915_private *dev_priv)
 {
 	u32 hotplug_irqs, enabled_irqs;
 
+	WARN_ON_ONCE(!INTEL_INFO(dev_priv)->num_pipes);
+
 	hotplug_irqs = SDE_HOTPLUG_MASK_SPT;
 	enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_spt);
 
@@ -3895,6 +3903,8 @@ static void ilk_hpd_irq_setup(struct drm_i915_private *dev_priv)
 {
 	u32 hotplug_irqs, enabled_irqs;
 
+	WARN_ON_ONCE(!INTEL_INFO(dev_priv)->num_pipes);
+
 	if (INTEL_GEN(dev_priv) >= 8) {
 		hotplug_irqs = GEN8_PORT_DP_A_HOTPLUG;
 		enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_bdw);
@@ -3957,6 +3967,8 @@ static void bxt_hpd_irq_setup(struct drm_i915_private *dev_priv)
 {
 	u32 hotplug_irqs, enabled_irqs;
 
+	WARN_ON_ONCE(!INTEL_INFO(dev_priv)->num_pipes);
+
 	enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_bxt);
 	hotplug_irqs = BXT_DE_PORT_HOTPLUG_MASK;
 
@@ -4674,6 +4686,8 @@ static void i915_hpd_irq_setup(struct drm_i915_private *dev_priv)
 {
 	u32 hotplug_en;
 
+	WARN_ON_ONCE(!INTEL_INFO(dev_priv)->num_pipes);
+
 	lockdep_assert_held(&dev_priv->irq_lock);
 
 	/* Note HDMI and DP share hotplug bits */
diff --git a/drivers/gpu/drm/i915/intel_hotplug.c b/drivers/gpu/drm/i915/intel_hotplug.c
index 648a13c6043c..908d8e589f9a 100644
--- a/drivers/gpu/drm/i915/intel_hotplug.c
+++ b/drivers/gpu/drm/i915/intel_hotplug.c
@@ -399,6 +399,8 @@ void intel_hpd_irq_handler(struct drm_i915_private *dev_priv,
 	if (!pin_mask)
 		return;
 
+	WARN_ON_ONCE(!INTEL_INFO(dev_priv)->num_pipes);
+
 	spin_lock(&dev_priv->irq_lock);
 	for_each_intel_encoder(&dev_priv->drm, encoder) {
 		enum hpd_pin pin = encoder->hpd_pin;
-- 
2.18.0

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