drm/i915/tgl: Keep FF dop clock enabled for A0

To ensure correct state data for compute workloads, we
need to keep the ff dop clock enabled.

References: HSDES#1606700617
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191015154449.10338-5-mika.kuoppala@linux.intel.com

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 81d299b..bc5fdb4 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -567,7 +567,7 @@ 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)
 {
-       /* Wa_1409142259 */
+       /* Wa_1409142259:tgl */
        WA_SET_BIT_MASKED(GEN11_COMMON_SLICE_CHICKEN3,
                          GEN12_DISABLE_CPS_AWARE_COLOR_PIPE);
 }
@@ -1265,6 +1265,13 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 {
        struct drm_i915_private *i915 = engine->i915;
 
+       if (IS_TGL_REVID(i915, TGL_REVID_A0, TGL_REVID_A0)) {
+               /* Wa_1606700617:tgl */
+               wa_masked_en(wal,
+                            GEN9_CS_DEBUG_MODE1,
+                            FF_DOP_CLOCK_GATE_DISABLE);
+       }
+
        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 821159c..4b58861 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7673,6 +7673,7 @@ enum {
 #define  GEN9_POOLED_EU_LOAD_BALANCING_FIX_DISABLE  (1 << 10)
 
 #define GEN9_CS_DEBUG_MODE1            _MMIO(0x20ec)
+#define   FF_DOP_CLOCK_GATE_DISABLE    REG_BIT(1)
 #define GEN9_CTX_PREEMPT_REG           _MMIO(0x2248)
 #define GEN8_CS_CHICKEN1               _MMIO(0x2580)
 #define GEN9_PREEMPT_3D_OBJECT_LEVEL           (1 << 0)