msm: camera: isp: validation of cmd_buf support

This change validates cmd_buf in IFE/TFE before submitting
BL to CDM when debugfs(enable_invalid_cmd_check) is enabled.

CRs-Fixed: 3616889
Change-Id: I5418661ff092fb15d04ab7dda6f3b59742a232a8
Signed-off-by: Karthik Dillibabu <quic_kard@quicinc.com>
(cherry picked from commit 7528980860a33e0d800915c64005965862b80982)

drivers/cam_cdm/cam_cdm_util.h

@@ -9,6 +9,7 @@
 
 /* Max len for tag name for header while dumping cmd buffer*/
 #define CAM_CDM_CMD_TAG_MAX_LEN 128
+#define CAM_CDM_COMMAND_OFFSET  24
 
 #include <linux/types.h>
 
@@ -227,6 +228,20 @@ struct cam_cdm_cmd_dump_header {
 	uint32_t  word_size;
 };
 
+/**
+ * cam_cdm_util_validate_cmd_buf()
+ *
+ * @brief:            Util function to validate cdm command buffers
+ *
+ * @cmd_buffer_start: Pointer to start of cmd buffer
+ * @cmd_buffer_end:   Pointer to end of cmd buffer
+ *
+ * return true if invalid cmd found, otherwise false
+ *
+ */
+bool cam_cdm_util_validate_cmd_buf(
+	uint32_t *cmd_buffer_start, uint32_t *cmd_buffer_end);
+
 /**
  * cam_cdm_util_log_cmd_bufs()
  *