case-lib: is_ipc4: use new debugfs file instead of kernel parameter

First step to remove use of kernel parameters Link: thesofproject/linux#4902 Link: thesofproject#1166 Signed-off-by: Pierre-Louis Bossart <[email protected]>
plbossart · Apr 3, 2024 · ba2c568 · ba2c568
1 parent a2062a3
commit ba2c568
Showing 1 changed file with 22 additions and 0 deletions.
diff --git a/case-lib/lib.sh b/case-lib/lib.sh
@@ -810,9 +810,31 @@ is_firmware_file_zephyr()
     test "$znum" -gt 10
 }
 
+is_ipc4_debugfs()
+{
+    local ipc_type
+
+    ipc_file=/sys/kernel/debug/sof/ipc_type
+    ipc_type=$(cat $ipc_file) || {
+        return 1
+    }
+
+    if [ "$ipc_type" -eq 1 ]; then
+        return 0
+    fi
+    return 1
+}
+
 is_ipc4()
 {
     local ipc_type
+
+    # First try with debugfs
+    if is_ipc4_debugfs; then
+	return 0
+    fi
+
+    # backwards-compatible fallback with ipc_type kernel parameter
     ipc_file=/sys/module/snd_sof_pci/parameters/ipc_type
 
     # If /sys/module/snd_sof_pci/parameters/ipc_type does not exist