Add missing tag for "Wa_14019159160 - Case 2" (for existing
PXP code that ensures run alone mode bit is set to allow
PxP-decryption.
v3: - Check targeted platforms using IP_VAL. (John Harrison)
v2: - Fix WA id number (John Harrison).
- Improve comments and code to be specific
for the targeted platforms (John Harrison)
Signed-off-by: Alan Previn <alan.previn.teres.alexis@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_lrc.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 7c367ba8d9dc..1152cf25d578 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -863,10 +863,12 @@ static bool ctx_needs_runalone(const struct intel_context *ce)
bool ctx_is_protected = false;
/*
- * On MTL and newer platforms, protected contexts require setting
- * the LRC run-alone bit or else the encryption will not happen.
+ * Wa_14019159160 - Case 2: mtl
+ * On some platforms, protected contexts require setting
+ * the LRC run-alone bit or else the encryption/decryption will not happen.
+ * NOTE: Case 2 only applies to PXP use-case of said workaround.
*/
- if (GRAPHICS_VER_FULL(ce->engine->i915) >= IP_VER(12, 70) &&
+ if (GRAPHICS_VER_FULL(ce->engine->i915) == IP_VER(12, 70) &&
(ce->engine->class == COMPUTE_CLASS || ce->engine->class == RENDER_CLASS)) {
rcu_read_lock();
gem_ctx = rcu_dereference(ce->gem_context);
base-commit: 5429d55de723544dfc0630cf39d96392052b27a1
--
2.39.0
