Log the address of the register that caused the timeout interrupt by reading RMTIMEOUTREG_CAPTURE --v2: - Update RMTIMEOUTREG_CAPTURE naming (Suraj) --v3: - XeLpdp naming convention. - Use if condition instead of else if Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@xxxxxxxxx> Reviewed-by: Suraj Kandpal <suraj.kandpal@xxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_display_irq.c | 9 ++++++++- drivers/gpu/drm/i915/i915_reg.h | 2 ++ 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_irq.c b/drivers/gpu/drm/i915/display/intel_display_irq.c index 5219ba295c74..9f452d92f6d4 100644 --- a/drivers/gpu/drm/i915/display/intel_display_irq.c +++ b/drivers/gpu/drm/i915/display/intel_display_irq.c @@ -906,6 +906,13 @@ gen8_de_misc_irq_handler(struct drm_i915_private *dev_priv, u32 iir) intel_pmdemand_irq_handler(dev_priv); found = true; } + + if (iir & XELPDP_RM_TIMEOUT) { + u32 val = intel_uncore_read(&dev_priv->uncore, + RM_TIMEOUT_REG_CAPTURE); + drm_warn(&dev_priv->drm, "Register Access Timeout = 0x%x\n", val); + found = true; + } } else if (iir & GEN8_DE_MISC_GSE) { intel_opregion_asle_intr(dev_priv); found = true; @@ -1710,7 +1717,7 @@ void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv) if (DISPLAY_VER(dev_priv) >= 14) { de_misc_masked |= XELPDP_PMDEMAND_RSPTOUT_ERR | - XELPDP_PMDEMAND_RSP; + XELPDP_PMDEMAND_RSP | XELPDP_RM_TIMEOUT; } else if (DISPLAY_VER(dev_priv) >= 11) { enum port port; diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 0e3d79227e3c..569b461022c5 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2396,6 +2396,7 @@ /* Display Internal Timeout Register */ #define RM_TIMEOUT _MMIO(0x42060) +#define RM_TIMEOUT_REG_CAPTURE _MMIO(0x420E0) #define MMIO_TIMEOUT_US(us) ((us) << 0) /* interrupts */ @@ -2574,6 +2575,7 @@ #define GEN8_DE_MISC_IMR _MMIO(0x44464) #define GEN8_DE_MISC_IIR _MMIO(0x44468) #define GEN8_DE_MISC_IER _MMIO(0x4446c) +#define XELPDP_RM_TIMEOUT REG_BIT(29) #define XELPDP_PMDEMAND_RSPTOUT_ERR REG_BIT(27) #define GEN8_DE_MISC_GSE REG_BIT(27) #define GEN8_DE_EDP_PSR REG_BIT(19) -- 2.45.2