drm/i915: Init some CHV workarounds via LRIs in ring->init_context()
Follow the BDW example and apply the workarounds touching registers
which are saved in the context image through LRIs in the new
ring->init_context() hook.
This makes Mesa much happier and eg. glxgears doesn't hang after
the first frame.
Cc: Arun Siluvery <arun.siluvery@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Add missing wa table initialization to avoid a functional
conflict with Arun's wa table debugfs support.]
Reviewed-by: "Barbalho, Rafael" <rafael.barbalho@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 14b517d..12135ef 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -681,7 +681,7 @@
return;
}
-static int gen8_init_workarounds(struct intel_engine_cs *ring)
+static int bdw_init_workarounds(struct intel_engine_cs *ring)
{
int ret;
struct drm_device *dev = ring->dev;
@@ -758,6 +758,45 @@
return 0;
}
+static int chv_init_workarounds(struct intel_engine_cs *ring)
+{
+ int ret;
+ struct drm_device *dev = ring->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ /*
+ * workarounds applied in this fn are part of register state context,
+ * they need to be re-initialized followed by gpu reset, suspend/resume,
+ * module reload.
+ */
+ dev_priv->num_wa_regs = 0;
+ memset(dev_priv->intel_wa_regs, 0, sizeof(dev_priv->intel_wa_regs));
+
+ ret = intel_ring_begin(ring, 12);
+ if (ret)
+ return ret;
+
+ /* WaDisablePartialInstShootdown:chv */
+ intel_ring_emit_wa(ring, GEN8_ROW_CHICKEN,
+ _MASKED_BIT_ENABLE(PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE));
+
+ /* WaDisableThreadStallDopClockGating:chv */
+ intel_ring_emit_wa(ring, GEN8_ROW_CHICKEN,
+ _MASKED_BIT_ENABLE(STALL_DOP_GATING_DISABLE));
+
+ /* WaDisableDopClockGating:chv (pre-production hw) */
+ intel_ring_emit_wa(ring, GEN7_ROW_CHICKEN2,
+ _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
+
+ /* WaDisableSamplerPowerBypass:chv (pre-production hw) */
+ intel_ring_emit_wa(ring, HALF_SLICE_CHICKEN3,
+ _MASKED_BIT_ENABLE(GEN8_SAMPLER_POWER_BYPASS_DIS));
+
+ intel_ring_advance(ring);
+
+ return 0;
+}
+
static int init_render_ring(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
@@ -2244,7 +2283,10 @@
dev_priv->semaphore_obj = obj;
}
}
- ring->init_context = gen8_init_workarounds;
+ if (IS_CHERRYVIEW(dev))
+ ring->init_context = chv_init_workarounds;
+ else
+ ring->init_context = bdw_init_workarounds;
ring->add_request = gen6_add_request;
ring->flush = gen8_render_ring_flush;
ring->irq_get = gen8_ring_get_irq;