drm/i915/mtl: Use primary GT's irq lock for media GT

When we hook up interrupts (in the next patch), interrupts for the media
GT are still processed as part of the primary GT's interrupt flow.  As
such, we should share the same IRQ lock with the primary GT.  Let's
convert gt->irq_lock into a pointer and just point the media GT's
instance at the same lock the primary GT is using.

v2:
 - Point media's gt->irq_lock at the primary GT lock properly.  (Daniele)
 - Fix jump target for intel_root_gt_init_early errors.  (Daniele)

Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220906234934.3655440-14-matthew.d.roper@intel.com
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

4 files changed, 13 insertions, 13 deletions

diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index 17109c513259..69cdaaddc4a9 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -169,11 +169,11 @@ static void pxp_queue_termination(struct intel_pxp *pxp)
 	 * We want to get the same effect as if we received a termination
 	 * interrupt, so just pretend that we did.
 	 */
-	spin_lock_irq(&gt->irq_lock);
+	spin_lock_irq(gt->irq_lock);
 	intel_pxp_mark_termination_in_progress(pxp);
 	pxp->session_events |= PXP_TERMINATION_REQUEST;
 	queue_work(system_unbound_wq, &pxp->session_work);
-	spin_unlock_irq(&gt->irq_lock);
+	spin_unlock_irq(gt->irq_lock);
 }
 
 static bool pxp_component_bound(struct intel_pxp *pxp)
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c
index c9da1015eb42..b2d1a0f9e7af 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c
@@ -46,9 +46,9 @@ static int pxp_terminate_set(void *data, u64 val)
 		return -ENODEV;
 
 	/* simulate a termination interrupt */
-	spin_lock_irq(&gt->irq_lock);
+	spin_lock_irq(gt->irq_lock);
 	intel_pxp_irq_handler(pxp, GEN12_DISPLAY_PXP_STATE_TERMINATED_INTERRUPT);
-	spin_unlock_irq(&gt->irq_lock);
+	spin_unlock_irq(gt->irq_lock);
 
 	if (!wait_for_completion_timeout(&pxp->termination,
 					 msecs_to_jiffies(100)))
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c b/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c
index 04745f914407..c28be430718a 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c
@@ -25,7 +25,7 @@ void intel_pxp_irq_handler(struct intel_pxp *pxp, u16 iir)
 	if (GEM_WARN_ON(!intel_pxp_is_enabled(pxp)))
 		return;
 
-	lockdep_assert_held(&gt->irq_lock);
+	lockdep_assert_held(gt->irq_lock);
 
 	if (unlikely(!iir))
 		return;
@@ -55,16 +55,16 @@ static inline void __pxp_set_interrupts(struct intel_gt *gt, u32 interrupts)
 
 static inline void pxp_irq_reset(struct intel_gt *gt)
 {
-	spin_lock_irq(&gt->irq_lock);
+	spin_lock_irq(gt->irq_lock);
 	gen11_gt_reset_one_iir(gt, 0, GEN11_KCR);
-	spin_unlock_irq(&gt->irq_lock);
+	spin_unlock_irq(gt->irq_lock);
 }
 
 void intel_pxp_irq_enable(struct intel_pxp *pxp)
 {
 	struct intel_gt *gt = pxp_to_gt(pxp);
 
-	spin_lock_irq(&gt->irq_lock);
+	spin_lock_irq(gt->irq_lock);
 
 	if (!pxp->irq_enabled)
 		WARN_ON_ONCE(gen11_gt_reset_one_iir(gt, 0, GEN11_KCR));
@@ -72,7 +72,7 @@ void intel_pxp_irq_enable(struct intel_pxp *pxp)
 	__pxp_set_interrupts(gt, GEN12_PXP_INTERRUPTS);
 	pxp->irq_enabled = true;
 
-	spin_unlock_irq(&gt->irq_lock);
+	spin_unlock_irq(gt->irq_lock);
 }
 
 void intel_pxp_irq_disable(struct intel_pxp *pxp)
@@ -88,12 +88,12 @@ void intel_pxp_irq_disable(struct intel_pxp *pxp)
 	 */
 	GEM_WARN_ON(intel_pxp_is_active(pxp));
 
-	spin_lock_irq(&gt->irq_lock);
+	spin_lock_irq(gt->irq_lock);
 
 	pxp->irq_enabled = false;
 	__pxp_set_interrupts(gt, 0);
 
-	spin_unlock_irq(&gt->irq_lock);
+	spin_unlock_irq(gt->irq_lock);
 	intel_synchronize_irq(gt->i915);
 
 	pxp_irq_reset(gt);
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
index 92b00b4de240..1bb5b5249157 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
@@ -144,9 +144,9 @@ void intel_pxp_session_work(struct work_struct *work)
 	intel_wakeref_t wakeref;
 	u32 events = 0;
 
-	spin_lock_irq(&gt->irq_lock);
+	spin_lock_irq(gt->irq_lock);
 	events = fetch_and_zero(&pxp->session_events);
-	spin_unlock_irq(&gt->irq_lock);
+	spin_unlock_irq(gt->irq_lock);
 
 	if (!events)
 		return;