Log the address of the register that caused the timeout
interrupt by reading RMTIMEOUTREG_CAPTURE
Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.gol...@intel.com>
---
drivers/gpu/drm/i915/display/intel_display_irq.c | 7 ++++++-
drivers/gpu/drm/i915/i915_reg.h | 2 ++
2 files changed, 8 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..8e22f7ac3db0 100644
--- a/drivers/gpu/drm/i915/display/intel_display_irq.c
+++ b/drivers/gpu/drm/i915/display/intel_display_irq.c
@@ -905,6 +905,11 @@ gen8_de_misc_irq_handler(struct drm_i915_private
*dev_priv, u32 iir)
intel_pmdemand_irq_handler(dev_priv);
found = true;
+ } else if (iir & GEN8_DE_RM_TIMEOUT) {
+ u32 val = intel_uncore_read(&dev_priv->uncore,
+ RMTIMEOUTREG_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);
@@ -1710,7 +1715,7 @@ 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 | GEN8_DE_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..858ce8a5d929 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 RMTIMEOUTREG_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 GEN8_DE_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
