On 22/07/2019 14:18, Chris Wilson wrote:
As a w/a for data corruption, we are told to set the preemption vertex
count to 0x20 on boot. As it is a counter, once contexts are active we
do not expect the value to be retained, so hide it from the wa-list
verification.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_workarounds.c | 24 +++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 704ace01e7f5..7628f8463317 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -647,6 +647,26 @@ int intel_engine_emit_ctx_wa(struct i915_request *rq)
return 0;
}
+static void
+gen8_gt_workarounds_init(struct drm_i915_private *i915,
+ struct i915_wa_list *wal)
+{
+ /* WaSetVfGuardbandPreemptionVertexCount:bdw,chv */
+ wa_write_masked_or(wal, _MMIO(0x83A4), 0, 0xffff0020);
0x83a4 is listed in saved state for the context so have you tried
putting it as a context workaround?
Regards,
Tvrtko
+}
+
+static void
+bdw_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
+{
+ gen8_gt_workarounds_init(i915, wal);
+}
+
+static void
+chv_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
+{
+ gen8_gt_workarounds_init(i915, wal);
+}
+
static void
gen9_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
{
@@ -907,6 +927,10 @@ gt_init_workarounds(struct drm_i915_private *i915, struct i915_wa_list *wal)
bxt_gt_workarounds_init(i915, wal);
else if (IS_SKYLAKE(i915))
skl_gt_workarounds_init(i915, wal);
+ else if (IS_CHERRYVIEW(i915))
+ chv_gt_workarounds_init(i915, wal);
+ else if (IS_BROADWELL(i915))
+ bdw_gt_workarounds_init(i915, wal);
else if (INTEL_GEN(i915) <= 8)
return;
else
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