lib: various documentation fixes

Fix some documentation comments and mark some struct members private.

Signed-off-by: Thomas Wood <thomas.wood@intel.com>

lib/igt_aux.c

@@ -430,10 +430,9 @@ bool igt_setup_runtime_pm(void)
 }
 
 /**
- * igt_runtime_pm_status:
+ * igt_get_runtime_pm_status:
  *
- * Returns:
- * The current runtime PM status.
+ * Returns: The current runtime PM status.
  */
 enum igt_runtime_pm_status igt_get_runtime_pm_status(void)
 {

lib/igt_core.c

@@ -1031,11 +1031,11 @@ static void fatal_sig_handler(int sig)
  * @fn: exit handler function
  *
  * Set a handler that will be called either when the process calls exit() or
- * returns from the main function, or one of the signals in 'handled_signals'
- * is raised. MAX_EXIT_HANDLERS handlers can be installed, each of which will
- * be called only once, even if a subsequent signal is raised. If the exit
- * handlers are called due to a signal, the signal will be re-raised with the
- * original signal disposition after all handlers returned.
+ * <!-- -->returns from the main function, or one of the signals in
+ * 'handled_signals' is raised. MAX_EXIT_HANDLERS handlers can be installed,
+ * each of which will be called only once, even if a subsequent signal is
+ * raised. If the exit handlers are called due to a signal, the signal will be
+ * re-raised with the original signal disposition after all handlers returned.
  *
  * The handler will be passed the signal number if called due to a signal, or
  * 0 otherwise. Exit handlers can also be used from test children spawned with

lib/igt_kms.h

@@ -99,6 +99,7 @@ typedef struct igt_pipe igt_pipe_t;
 typedef uint32_t igt_fixed_t;			/* 16.16 fixed point */
 
 typedef struct {
+	/*< private >*/
 	igt_pipe_t *pipe;
 	int index;
 	unsigned int is_primary       : 1;
@@ -127,6 +128,7 @@ struct igt_pipe {
 };
 
 typedef struct {
+	/*< private >*/
 	igt_display_t *display;
 	uint32_t id;					/* KMS id */
 	struct kmstest_connector_config config;

lib/intel_batchbuffer.h

@@ -204,14 +204,10 @@ void intel_copy_bo(struct intel_batchbuffer *batch,
  * @tiling: tiling mode bits
  * @data: pointer to the memory mapping of the buffer
  * @size: size of the buffer object
- * @num_tiles: number of tiles of the buffer object
  *
  * This is a i-g-t buffer object wrapper structure which augments the baseline
  * libdrm buffer object with suitable data needed by the render copy and the
  * media fill functions.
- *
- * Note that @num_tiles is only used by gem_stress.c internally and can be
- * ignored.
  */
 struct igt_buf {
     drm_intel_bo *bo;
@@ -219,6 +215,7 @@ struct igt_buf {
     uint32_t tiling;
     uint32_t *data;
     uint32_t size;
+    /*< private >*/
     unsigned num_tiles;
 };