drm/xe/debugfs: Update xe_tuning_dump signature

Our debugfs helper xe_gt_debugfs_show_with_rpm() expects print()
functions to return int. New signature allows us to drop wrapper.

While around, print additional separation lines using puts() to
avoid output with leading \n which might confuse some printers.

Signed-off-by: Michal Wajdeczko <[e-mail]>
Cc: Rodrigo Vivi <[e-mail]>
Reviewed-by: Rodrigo Vivi <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/gpu/drm/xe/xe_gt_debugfs.c

···
 	return 0;
 }
 
-static int tunings(struct xe_gt *gt, struct drm_printer *p)
-{
-	xe_tuning_dump(gt, p);
-	return 0;
-}
-
 static int pat(struct xe_gt *gt, struct drm_printer *p)
 {
 	xe_pat_dump(gt, p);
···
 	{ "register-save-restore",
 		.show = xe_gt_debugfs_show_with_rpm, .data = register_save_restore },
 	{ "workarounds", .show = xe_gt_debugfs_show_with_rpm, .data = xe_wa_gt_dump },
-	{ "tunings", .show = xe_gt_debugfs_show_with_rpm, .data = tunings },
+	{ "tunings", .show = xe_gt_debugfs_show_with_rpm, .data = xe_tuning_dump },
 	{ "default_lrc_rcs", .show = xe_gt_debugfs_show_with_rpm, .data = rcs_default_lrc },
 	{ "default_lrc_ccs", .show = xe_gt_debugfs_show_with_rpm, .data = ccs_default_lrc },
 	{ "default_lrc_bcs", .show = xe_gt_debugfs_show_with_rpm, .data = bcs_default_lrc },

drivers/gpu/drm/xe/xe_tuning.c

···
 	xe_rtp_process_to_sr(&ctx, lrc_tunings, ARRAY_SIZE(lrc_tunings), &hwe->reg_lrc);
 }
 
-void xe_tuning_dump(struct xe_gt *gt, struct drm_printer *p)
+/**
+ * xe_tuning_dump() - Dump GT tuning info into a drm printer.
+ * @gt: the &xe_gt
+ * @p: the &drm_printer
+ *
+ * Return: always 0.
+ */
+int xe_tuning_dump(struct xe_gt *gt, struct drm_printer *p)
 {
 	size_t idx;
 
···
 	for_each_set_bit(idx, gt->tuning_active.gt, ARRAY_SIZE(gt_tunings))
 		drm_printf_indent(p, 1, "%s\n", gt_tunings[idx].name);
 
-	drm_printf(p, "\nEngine Tunings\n");
+	drm_puts(p, "\n");
+	drm_printf(p, "Engine Tunings\n");
 	for_each_set_bit(idx, gt->tuning_active.engine, ARRAY_SIZE(engine_tunings))
 		drm_printf_indent(p, 1, "%s\n", engine_tunings[idx].name);
 
-	drm_printf(p, "\nLRC Tunings\n");
+	drm_puts(p, "\n");
+	drm_printf(p, "LRC Tunings\n");
 	for_each_set_bit(idx, gt->tuning_active.lrc, ARRAY_SIZE(lrc_tunings))
 		drm_printf_indent(p, 1, "%s\n", lrc_tunings[idx].name);
+
+	return 0;
 }

drivers/gpu/drm/xe/xe_tuning.h

···
 void xe_tuning_process_gt(struct xe_gt *gt);
 void xe_tuning_process_engine(struct xe_hw_engine *hwe);
 void xe_tuning_process_lrc(struct xe_hw_engine *hwe);
-void xe_tuning_dump(struct xe_gt *gt, struct drm_printer *p);
+int xe_tuning_dump(struct xe_gt *gt, struct drm_printer *p);
 
 #endif