Ré : How to set debug parameters to get the information I want?

[Paul Dufresne <dufresnep@xxxxxxxx>]

Seems I have been able to push:
unneeded info looks like this: 
[  338.951804] nouveau: DRM-master:00000000:8000900b: fini completed in 7us 
[  338.951811] nouveau: DRM-master:00000000:8000900b: destroy children... 
[  338.951818] nouveau: DRM-master:00000000:8000900b: destroy running... 
[  338.951825] nouveau: DRM-master:00000000:8000900b: destroy completed in 6us... 
[  338.954303] nouveau: DRM-master:00000000:8000900b: init running...
to trace level... making nouveau.debug=debug more clear.

I have found the macros that do these messages in drivers/gpu/drm/nouveau/include/nvkm/core/client.h :
/* logging for client-facing objects */
#define nvif_printk(o,l,p,f,a...) do {                                         \
	const struct nvkm_object *_object = (o);                               \
	const struct nvkm_client *_client = _object->client;                   \
	if (_client->debug >= NV_DBG_##l)                                      \
		printk(KERN_##p "nouveau: %s:%08x:%08x: "f, _client->name,     \
		       _object->handle, _object->oclass, ##a);                 \
} while(0)
#define nvif_fatal(o,f,a...) nvif_printk((o), FATAL, CRIT, f, ##a)
#define nvif_error(o,f,a...) nvif_printk((o), ERROR,  ERR, f, ##a)
#define nvif_debug(o,f,a...) nvif_printk((o), DEBUG, INFO, f, ##a)
#define nvif_trace(o,f,a...) nvif_printk((o), TRACE, INFO, f, ##a)
#define nvif_info(o,f,a...)  nvif_printk((o),  INFO, INFO, f, ##a)
#define nvif_ioctl(o,f,a...) nvif_trace((o), "ioctl: "f, ##a)
#endif

So all I done was:
sed -i 's/nvif_debug/nvif_trace/g' drivers/gpu/drm/nouveau/nvkm/core/object.c

resulting in a "patch":
paul@albukerk:~/linux/linux-6.7-rc3$ diff -u drivers/gpu/drm/nouveau/nvkm/core/object.c.orig drivers/gpu/drm/nouveau/nvkm/core/object.c
--- drivers/gpu/drm/nouveau/nvkm/core/object.c.orig	2023-12-02 17:47:01.298989857 -0500
+++ drivers/gpu/drm/nouveau/nvkm/core/object.c	2023-12-02 17:48:32.814997742 -0500
@@ -183,7 +183,7 @@
 	s64 time;
 	int ret;
 
-	nvif_debug(object, "%s children...\n", action);
+	nvif_trace(object, "%s children...\n", action);
 	time = ktime_to_us(ktime_get());
 	list_for_each_entry_reverse(child, &object->tree, head) {
 		ret = nvkm_object_fini(child, suspend);
@@ -191,7 +191,7 @@
 			goto fail_child;
 	}
 
-	nvif_debug(object, "%s running...\n", action);
+	nvif_trace(object, "%s running...\n", action);
 	if (object->func->fini) {
 		ret = object->func->fini(object, suspend);
 		if (ret) {
@@ -202,7 +202,7 @@
 	}
 
 	time = ktime_to_us(ktime_get()) - time;
-	nvif_debug(object, "%s completed in %lldus\n", action, time);
+	nvif_trace(object, "%s completed in %lldus\n", action, time);
 	return 0;
 
 fail:
@@ -225,7 +225,7 @@
 	s64 time;
 	int ret;
 
-	nvif_debug(object, "init running...\n");
+	nvif_trace(object, "init running...\n");
 	time = ktime_to_us(ktime_get());
 	if (object->func->init) {
 		ret = object->func->init(object);
@@ -233,7 +233,7 @@
 			goto fail;
 	}
 
-	nvif_debug(object, "init children...\n");
+	nvif_trace(object, "init children...\n");
 	list_for_each_entry(child, &object->tree, head) {
 		ret = nvkm_object_init(child);
 		if (ret)
@@ -241,7 +241,7 @@
 	}
 
 	time = ktime_to_us(ktime_get()) - time;
-	nvif_debug(object, "init completed in %lldus\n", time);
+	nvif_trace(object, "init completed in %lldus\n", time);
 	return 0;
 
 fail_child:
@@ -261,19 +261,19 @@
 	void *data = object;
 	s64 time;
 
-	nvif_debug(object, "destroy children...\n");
+	nvif_trace(object, "destroy children...\n");
 	time = ktime_to_us(ktime_get());
 	list_for_each_entry_safe(child, ctemp, &object->tree, head) {
 		nvkm_object_del(&child);
 	}
 
-	nvif_debug(object, "destroy running...\n");
+	nvif_trace(object, "destroy running...\n");
 	nvkm_object_unmap(object);
 	if (object->func->dtor)
 		data = object->func->dtor(object);
 	nvkm_engine_unref(&object->engine);
 	time = ktime_to_us(ktime_get()) - time;
-	nvif_debug(object, "destroy completed in %lldus...\n", time);
+	nvif_trace(object, "destroy completed in %lldus...\n", time);
 	return data;
 }
 
paul@albukerk:~/linux/linux-6.7-rc3$ 

Now need to work on removing also the:
[  339.029792] nouveau 0000:01:00.0: therm: FAN target request: 31%
[  339.029805] nouveau 0000:01:00.0: therm: FAN target: 31
[  339.029816] nouveau 0000:01:00.0: therm: FAN update: 31