drm: remove drm_debug_printer in favor of drm_dbg_printer

Convert the remaining drm_debug_printer users over to drm_dbg_printer,
as it can handle the cases without struct drm_device pointer, and also
provides drm debug category and prefix support. Remove drm_debug_printer
altogether.

Signed-off-by: Jani Nikula <[e-mail]>
Reviewed-by: Luca Coelho <[e-mail]>
Acked-by: Maxime Ripard <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/18b[e-mail]

drivers/gpu/drm/drm_modeset_lock.c

···
 
 static void __drm_stack_depot_print(depot_stack_handle_t stack_depot)
 {
-	struct drm_printer p = drm_debug_printer("drm_modeset_lock");
+	struct drm_printer p = drm_dbg_printer(NULL, DRM_UT_KMS, "drm_modeset_lock");
 	unsigned long *entries;
 	unsigned int nr_entries;
 	char *buf;

drivers/gpu/drm/drm_print.c

···
 }
 EXPORT_SYMBOL(__drm_printfn_info);
 
-void __drm_printfn_debug(struct drm_printer *p, struct va_format *vaf)
-{
-	/* pr_debug callsite decorations are unhelpful here */
-	printk(KERN_DEBUG "%s %pV", p->prefix, vaf);
-}
-EXPORT_SYMBOL(__drm_printfn_debug);
-
 void __drm_printfn_dbg(struct drm_printer *p, struct va_format *vaf)
 {
 	const struct drm_device *drm = p->arg;

drivers/gpu/drm/ttm/ttm_bo.c

···
 static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo,
 					struct ttm_placement *placement)
 {
-	struct drm_printer p = drm_debug_printer(TTM_PFX);
+	struct drm_printer p = drm_dbg_printer(NULL, DRM_UT_CORE, TTM_PFX);
 	struct ttm_resource_manager *man;
 	int i, mem_type;
 

include/drm/drm_print.h

···
 void __drm_printfn_seq_file(struct drm_printer *p, struct va_format *vaf);
 void __drm_puts_seq_file(struct drm_printer *p, const char *str);
 void __drm_printfn_info(struct drm_printer *p, struct va_format *vaf);
-void __drm_printfn_debug(struct drm_printer *p, struct va_format *vaf);
 void __drm_printfn_dbg(struct drm_printer *p, struct va_format *vaf);
 void __drm_printfn_err(struct drm_printer *p, struct va_format *vaf);
 
···
 	struct drm_printer p = {
 		.printfn = __drm_printfn_info,
 		.arg = dev,
-	};
-	return p;
-}
-
-/**
- * drm_debug_printer - construct a &drm_printer that outputs to pr_debug()
- * @prefix: debug output prefix
- *
- * RETURNS:
- * The &drm_printer object
- */
-static inline struct drm_printer drm_debug_printer(const char *prefix)
-{
-	struct drm_printer p = {
-		.printfn = __drm_printfn_debug,
-		.prefix = prefix
 	};
 	return p;
 }