From: Michel Thierry <michel.thierry@xxxxxxxxx>
Implement Wa_1604555607 (set the DS pairing timer to 128 cycles).
FF_MODE2 is part of the register state context, that's why it is
implemented here.
v2: Rebased on top of the WA refactoring (Oscar)
v3: Correctly add to ctx_workarounds_init (Michel)
BSpec: 19363
HSDES: 1604555607
Signed-off-by: Michel Thierry <michel.thierry@xxxxxxxxx>
Signed-off-by: Ramalingam C <ramlingam.c@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_workarounds.c | 9 +++++++++
drivers/gpu/drm/i915/i915_reg.h | 5 +++++
2 files changed, 14 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index ba65e5018978..4049b876492a 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -567,9 +567,18 @@ static void icl_ctx_workarounds_init(struct intel_engine_cs *engine,
static void tgl_ctx_workarounds_init(struct intel_engine_cs *engine,
struct i915_wa_list *wal)
{
+ struct drm_i915_private *dev_priv = engine->i915;
+ u32 val;
+
/* Wa_1409142259 */
WA_SET_BIT_MASKED(GEN11_COMMON_SLICE_CHICKEN3,
GEN12_DISABLE_CPS_AWARE_COLOR_PIPE);
+
+ /* Wa_1604555607:tgl */
+ val = I915_READ(FF_MODE2);
+ val &= ~FF_MODE2_TDS_TIMER_MASK;
+ val |= FF_MODE2_TDS_TIMER_128;
+ wa_write_masked_or(wal, FF_MODE2, FF_MODE2_TDS_TIMER_MASK, val);
}
static void
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 058aa5ca8b73..ff19b8c80b40 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7775,6 +7775,11 @@ enum {
#define PIXEL_ROUNDING_TRUNC_FB_PASSTHRU (1 << 15)
#define PER_PIXEL_ALPHA_BYPASS_EN (1 << 7)
+#define FF_MODE2 _MMIO(0x6604)
+#define FF_MODE2_TDS_TIMER_SHIFT (16)
+#define FF_MODE2_TDS_TIMER_128 (4 << FF_MODE2_TDS_TIMER_SHIFT)
+#define FF_MODE2_TDS_TIMER_MASK (0xff << FF_MODE2_TDS_TIMER_SHIFT)
+
/* PCH */
#define PCH_DISPLAY_BASE 0xc0000u
--
2.20.1
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