[Intel-gfx] [PATCH] drm/i915/tgl: Move the SAMPLER_MODE setup into the context

[Chris Wilson]

SAMPLER_MODE is a context saved/restored register and needs to be loaded
into a context for it to be preserved across a GPU reset -- as has been
done on the previous generations of the same register.

Fixes: 7f0cc34b5349 ("drm/i915/tgl: Implement Wa_1406941453")
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Cc: Stuart Summers <stuart.summers at intel.com>
Cc: Radhakrishna Sripada <radhakrishna.sripada at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 11 ++++-------
 drivers/gpu/drm/i915/i915_reg.h             |  4 +---
 2 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 25ae60846398..3419b9d82cfd 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -570,6 +570,10 @@ static void tgl_ctx_workarounds_init(struct intel_engine_cs *engine,
 	/* Wa_1409142259 */
 	WA_SET_BIT_MASKED(GEN11_COMMON_SLICE_CHICKEN3,
 			  GEN12_DISABLE_CPS_AWARE_COLOR_PIPE);
+
+	/* Wa_1406941453:tgl */
+	WA_SET_BIT_MASKED(GEN10_SAMPLER_MODE,
+			  GEN12_SAMPLER_ENABLE_SMALL_PL);
 }
 
 static void
@@ -1260,13 +1264,6 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 {
 	struct drm_i915_private *i915 = engine->i915;
 
-	if (IS_GEN(i915, 12)) {
-		/* Wa_1406941453:tgl */
-		wa_masked_en(wal,
-			     SAMPLER_MODE,
-			     SAMPLER_ENABLE_SMALL_PL);
-	}
-
 	if (IS_GEN(i915, 11)) {
 		/* This is not an Wa. Enable for better image quality */
 		wa_masked_en(wal,
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 5e3a6178aff4..11014c45444e 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8936,6 +8936,7 @@ enum {
 
 #define GEN10_SAMPLER_MODE		_MMIO(0xE18C)
 #define   GEN11_SAMPLER_ENABLE_HEADLESS_MSG	REG_BIT(5)
+#define   GEN12_SAMPLER_ENABLE_SMALL_PL		REG_BIT(15)
 
 /* IVYBRIDGE DPF */
 #define GEN7_L3CDERRST1(slice)		_MMIO(0xB008 + (slice) * 0x200) /* L3CD Error Status 1 */
@@ -8965,9 +8966,6 @@ enum {
 #define   GEN9_DG_MIRROR_FIX_ENABLE	(1 << 5)
 #define   GEN9_CCS_TLB_PREFETCH_ENABLE	(1 << 3)
 
-#define SAMPLER_MODE			_MMIO(0xe18c)
-#define   SAMPLER_ENABLE_SMALL_PL	(1 << 15)
-
 #define GEN8_ROW_CHICKEN		_MMIO(0xe4f0)
 #define   FLOW_CONTROL_ENABLE		(1 << 15)
 #define   PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE	(1 << 8)
-- 
2.23.0