Avoid possible hang in CPSS unit.
Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_workarounds.c | 5 +++++
drivers/gpu/drm/i915/i915_reg.h | 3 +++
2 files changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index db7844daace9..b7d7fdc5ba90 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -897,6 +897,11 @@ icl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
static void
tgl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
{
+ /* Wa_1409420604:tgl */
+ if (IS_TGL_REVID(i915, TGL_REVID_A0, TGL_REVID_A0))
+ wa_write_or(wal,
+ SUBSLICE_UNIT_LEVEL_CLKGATE2,
+ CPSSUNIT_CLKGATE_DIS);
}
static void
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 781ca18cb45b..51c3e7975d6b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4054,6 +4054,9 @@ enum {
#define SUBSLICE_UNIT_LEVEL_CLKGATE _MMIO(0x9524)
#define GWUNIT_CLKGATE_DIS (1 << 16)
+#define SUBSLICE_UNIT_LEVEL_CLKGATE2 _MMIO(0x9528)
+#define CPSSUNIT_CLKGATE_DIS (1 << 9)
+
#define UNSLICE_UNIT_LEVEL_CLKGATE _MMIO(0x9434)
#define VFUNIT_CLKGATE_DIS (1 << 20)
--
2.17.1
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