disp: msm: dsi: adding prefix for logs

Adding debug, info and error prefix for log messages
in dsi files. To enable debug logs
run "echo 0x1 > /sys/module/drm/parameters/debug"

Change-Id: I438ac16954bd1d39450f8adeb7fb17f9ea6f8140
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>

msm/dsi/dsi_defs.h

@@ -43,6 +43,14 @@
 #define display_for_each_ctrl(index, display) \
 	for (index = 0; (index < (display)->ctrl_count) &&\
 			(index < MAX_DSI_CTRLS_PER_DISPLAY); index++)
+
+#define DSI_WARN(fmt, ...)	DRM_WARN("[msm-dsi-warn]: "fmt, ##__VA_ARGS__)
+#define DSI_ERR(fmt, ...)	DRM_DEV_ERROR(NULL, "[msm-dsi-error]: " fmt, \
+								##__VA_ARGS__)
+#define DSI_INFO(fmt, ...)	DRM_DEV_INFO(NULL, "[msm-dsi-info]: "fmt, \
+								##__VA_ARGS__)
+#define DSI_DEBUG(fmt, ...)	DRM_DEV_DEBUG(NULL, "[msm-dsi-debug]: "fmt, \
+								##__VA_ARGS__)
 /**
  * enum dsi_pixel_format - DSI pixel formats
  * @DSI_PIXEL_FORMAT_RGB565: