media: atomisp: make it use dbg_level to control debug level

This driver has 3 different types of debug messages:

	- dev_dbg()
	- dbg_level
	- ia_css_debug_trace_level

Which is crazy. Ideally, it shold just use dev_dbg()
everywhere, but for now let's unify the last two machanisms.
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/pci/atomisp_compat_css20.c

@@ -85,7 +85,7 @@ void atomisp_css_debug_set_dtrace_level(const unsigned int trace_level)
 
 unsigned int atomisp_css_debug_get_dtrace_level(void)
 {
-	return ia_css_debug_trace_level;
+	return dbg_level;
 }
 
 static void atomisp_css2_hw_store_8(hrt_address addr, uint8_t data)

drivers/staging/media/atomisp/pci/atomisp_v4l2.c

@@ -83,7 +83,7 @@ MODULE_PARM_DESC(defer_fw_load,
 /* cross componnet debug message flag */
 int dbg_level;
 module_param(dbg_level, int, 0644);
-MODULE_PARM_DESC(dbg_level, "debug message on/off (default:off)");
+MODULE_PARM_DESC(dbg_level, "debug message level (default:0)");
 
 /* log function switch */
 int dbg_func = 2;

drivers/staging/media/atomisp/pci/runtime/debug/interface/ia_css_debug.h

@@ -44,8 +44,9 @@
 #define IA_CSS_DEBUG_PARAM   8
 /*! Level for tracing info messages */
 #define IA_CSS_DEBUG_INFO    9
+
 /* Global variable which controls the verbosity levels of the debug tracing */
-extern unsigned int ia_css_debug_trace_level;
+extern int dbg_level;
 
 /*! @brief Enum defining the different isp parameters to dump.
  *  Values can be combined to dump a combination of sets.
@@ -130,7 +131,7 @@ enum ia_css_debug_enable_param_dump {
 static inline void
 ia_css_debug_vdtrace(unsigned int level, const char *fmt, va_list args)
 {
-	if (ia_css_debug_trace_level >= level)
+	if (dbg_level >= level)
 		sh_css_vprint(fmt, args);
 }
 

drivers/staging/media/atomisp/pci/runtime/debug/src/ia_css_debug.c

@@ -103,9 +103,6 @@
 #include "gc/gc_2/ia_css_gc2.host.h"
 #include "ynr/ynr_2/ia_css_ynr2.host.h"
 
-/* Global variable to store the dtrace verbosity level */
-unsigned int ia_css_debug_trace_level = IA_CSS_DEBUG_WARNING;
-
 #define DPG_START "ia_css_debug_pipe_graph_dump_start "
 #define DPG_END   " ia_css_debug_pipe_graph_dump_end\n"
 
@@ -244,13 +241,13 @@ void ia_css_debug_dump_sp_stack_info(void)
 
 void ia_css_debug_set_dtrace_level(const unsigned int trace_level)
 {
-	ia_css_debug_trace_level = trace_level;
+	dbg_level = trace_level;
 	return;
 }
 
 unsigned int ia_css_debug_get_dtrace_level(void)
 {
-	return ia_css_debug_trace_level;
+	return dbg_level;
 }
 
 static const char *debug_stream_format2str(const enum atomisp_input_format