This is a permanent workaround for TGL,RKL,DG1 and ADLS.
Signed-off-by: Swathi Dhanavanthri <swathi.dhanavanthri@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_workarounds.c | 27 +++++++++++++++++++++
drivers/gpu/drm/i915/i915_reg.h | 3 +++
2 files changed, 30 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 3b4a7da60f0b..01f34a6bdf3e 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1117,11 +1117,38 @@ icl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
L3_CLKGATE_DIS | L3_CR2X_CLKGATE_DIS);
}
+/*
+ * Though there are per-engine instances of these registers,
+ * they retain their value through engine resets and should
+ * only be provided on the GT workaround list rather than
+ * the engine-specific workaround list.
+ *
+ */
+static void
+wa_14011060649(struct drm_i915_private *i915, struct i915_wa_list *wal)
+{
+ struct intel_engine_cs *engine;
+ struct intel_gt *gt = &i915->gt;
+ int id;
+
+ for_each_engine(engine, gt, id) {
+ if ((engine->class != VIDEO_DECODE_CLASS) ||
+ (engine->instance % 2))
+ continue;
+
+ wa_write_or(wal, VDBOX_CGCTL3F10(engine->mmio_base),
+ IECPUNIT_CLKGATE_DIS);
+ }
+}
+
static void
gen12_gt_workarounds_init(struct drm_i915_private *i915,
struct i915_wa_list *wal)
{
wa_init_mcr(i915, wal);
+
+ /* Wa_14011060649:tgl,rkl,dg1,adls */
+ wa_14011060649(i915, wal);
}
static void
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index e5dd0203991b..cc60556306e2 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2715,6 +2715,9 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
#define RING_INDIRECT_CTX_OFFSET(base) _MMIO((base) + 0x1c8) /* gen8+ */
#define RING_CTX_TIMESTAMP(base) _MMIO((base) + 0x3a8) /* gen8+ */
+#define VDBOX_CGCTL3F10(base) _MMIO((base) + 0x3f10)
+#define IECPUNIT_CLKGATE_DIS REG_BIT(22)
+
#define ERROR_GEN6 _MMIO(0x40a0)
#define GEN7_ERR_INT _MMIO(0x44040)
#define ERR_INT_POISON (1 << 31)
--
2.20.1
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