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-rw-r--r--include/uapi/drm/i915_drm.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 6c02ced663f8..b57985929553 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -481,6 +481,12 @@ typedef struct drm_i915_irq_wait {
*/
#define I915_PARAM_HAS_CONTEXT_ISOLATION 50
+/* Frequency of the command streamer timestamps given by the *_TIMESTAMP
+ * registers. This used to be fixed per platform but from CNL onwards, this
+ * might vary depending on the parts.
+ */
+#define I915_PARAM_CS_TIMESTAMP_FREQUENCY 51
+
typedef struct drm_i915_getparam {
__s32 param;
/*