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drm/i915: Disable display interrupts during display IRQ handler 

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
V2: Change Title to remove SDE reference.
V3: Fix TAB spacing.

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>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191121201455.2558-1-clinton.a.taylor@intel.com
This commit is contained in:
Clint Taylor 2019-11-21 12:14:55 -08:00 committed by Lucas De Marchi
parent 071309814d
commit 7e7129dcbd
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/i915/i915_irq.c
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@ -2484,7 +2484,11 @@ __gen11_irq_handler(struct drm_i915_private * const i915,
* GEN11_DISPLAY_INT_CTL has same format as GEN8_MASTER_IRQ * GEN11_DISPLAY_INT_CTL has same format as GEN8_MASTER_IRQ
* for the display related bits. * for the display related bits.
*/ */
raw_reg_write(regs, GEN11_DISPLAY_INT_CTL, 0x0);
gen8_de_irq_handler(i915, disp_ctl); 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); enable_rpm_wakeref_asserts(&i915->runtime_pm);
} }