diff mbox series

drm/i915: Disable display interrupts during display IRQ handler

Message ID 20191121174030.1037-1-clinton.a.taylor@intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915: Disable display interrupts during display IRQ handler | expand

Commit Message

Clint Taylor Nov. 21, 2019, 5:40 p.m. UTC 
From: Clint Taylor <clinton.a.taylor@intel.com>

During the Display Interrupt Service routine the Display Interrupt
Enable bit must be disabled, The interrupts handled, then the
Display Interrupt Enable bit must be set to prevent possible missed
interrupts.

Bspec: 49212
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Aditya Swarup <aditya.swarup@intel.com>

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Clint Taylor <clinton.a.taylor@intel.com>
---
 drivers/gpu/drm/i915/i915_irq.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index dae00f7dd7df..43434273a08a 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2484,7 +2484,11 @@  __gen11_irq_handler(struct drm_i915_private * const i915,
 		 * GEN11_DISPLAY_INT_CTL has same format as GEN8_MASTER_IRQ
 		 * for the display related bits.
 		 */
+		raw_reg_write(regs, GEN11_DISPLAY_INT_CTL, 0x0);
 		gen8_de_irq_handler(i915, disp_ctl);
+		raw_reg_write(regs, GEN11_DISPLAY_INT_CTL,
+					  GEN11_DISPLAY_IRQ_ENABLE);
+
 		enable_rpm_wakeref_asserts(&i915->runtime_pm);
 	}