2 files changed, 15 insertions, 0 deletions
diff --git a/src/gallium/winsys/intel/drm/intel_drm_winsys.c b/src/gallium/winsys/intel/drm/intel_drm_winsys.c
index 12ed2e43355..bd805fdb786 100644
--- a/src/gallium/winsys/intel/drm/intel_drm_winsys.c
+++ b/src/gallium/winsys/intel/drm/intel_drm_winsys.c
@@ -100,6 +100,14 @@ test_address_swizzling(struct intel_winsys *winsys)
 }
 
 static bool
+test_reg_read(struct intel_winsys *winsys, uint32_t reg)
+{
+   uint64_t dummy;
+
+   return !drm_intel_reg_read(winsys->bufmgr, reg, &dummy);
+}
+
+static bool
 init_info(struct intel_winsys *winsys)
 {
    struct intel_winsys_info *info = &winsys->info;
@@ -130,6 +138,9 @@ init_info(struct intel_winsys *winsys)
    get_param(winsys, I915_PARAM_HAS_LLC, &val);
    info->has_llc = val;
 
+   /* test TIMESTAMP read */
+   info->has_timestamp = test_reg_read(winsys, 0x2358);
+
    get_param(winsys, I915_PARAM_HAS_GEN7_SOL_RESET, &val);
    info->has_gen7_sol_reset = val;
 
diff --git a/src/gallium/winsys/intel/intel_winsys.h b/src/gallium/winsys/intel/intel_winsys.h
index e84c9600c35..15f1aec1093 100644
--- a/src/gallium/winsys/intel/intel_winsys.h
+++ b/src/gallium/winsys/intel/intel_winsys.h
@@ -69,9 +69,13 @@ struct intel_bo;
 
 struct intel_winsys_info {
    int devid;
+
    bool has_llc;
    bool has_gen7_sol_reset;
    bool has_address_swizzling;
+
+   /* valid registers for intel_winsys_read_reg() */
+   bool has_timestamp;
 };
 
 struct intel_winsys *