Avoids a hang during soft reset.
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Signed-off-by: Oscar Mateo <oscar.mateo@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_reg.h | 5 +++++
drivers/gpu/drm/i915/intel_pm.c | 8 ++++++++
2 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index af4fee2..408697b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -9703,6 +9703,11 @@ enum skl_power_gate {
#define GEN9_VEBOX_MOCS(i) _MMIO(0xcb00 + (i) * 4) /* Video MOCS registers */
#define GEN9_BLT_MOCS(i) _MMIO(0xcc00 + (i) * 4) /* Blitter MOCS registers */
+#define GEN10_SCRATCH_LNCF2 _MMIO(0xb0a0)
+#define PMFLUSHDONE_LNICRSDROP (1 << 20)
+#define PMFLUSH_GAPL3UNBLOCK (1 << 21)
+#define PMFLUSHDONE_LNEBLK (1 << 22)
+
/* gamt regs */
#define GEN8_L3_LRA_1_GPGPU _MMIO(0x4dd4)
#define GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_BDW 0x67F1427F /* max/min for LRA1/2 */
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 1acc719..b1c00e5 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -8581,6 +8581,14 @@ static void icl_init_clock_gating(struct drm_i915_private *dev_priv)
I915_WRITE(INF_UNIT_LEVEL_CLKGATE,
(I915_READ(INF_UNIT_LEVEL_CLKGATE) |
CGPSF_CLKGATE_DIS));
+
+ /* WaForwardProgressSoftReset:icl (pre-prod) */
+ if (IS_ICL_REVID(dev_priv, ICL_REVID_A0, ICL_REVID_B0))
+ I915_WRITE(GEN10_SCRATCH_LNCF2,
+ (I915_READ(GEN10_SCRATCH_LNCF2) |
+ PMFLUSHDONE_LNICRSDROP |
+ PMFLUSH_GAPL3UNBLOCK |
+ PMFLUSHDONE_LNEBLK));
}
static void cnl_init_clock_gating(struct drm_i915_private *dev_priv)
--
1.9.1
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