[PATCH v3 4/8] drm/print: Add drm_printf_indent()

[Noralf Trønnes]

Add drm_printf_indent() that adds tab indentation according to argument.

Signed-off-by: Noralf Trønnes <noralf at tronnes.org>
---
 drivers/gpu/drm/drm_print.c | 21 +++++++++++++++++++++
 include/drm/drm_print.h     |  2 ++
 2 files changed, 23 insertions(+)

diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c
index 0b3bf476dc4b..dac3ee98b30f 100644
--- a/drivers/gpu/drm/drm_print.c
+++ b/drivers/gpu/drm/drm_print.c
@@ -64,6 +64,27 @@ void drm_printf(struct drm_printer *p, const char *f, ...)
 }
 EXPORT_SYMBOL(drm_printf);
 
+/**
+ * drm_printf_indent - print to a &drm_printer stream with indentation
+ * @p: the &drm_printer
+ * @i: indentation
+ * @f: format string
+ */
+void drm_printf_indent(struct drm_printer *p, unsigned int i, const char *f, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	drm_printf(p, "%.*s", i, "\t\t\t\t\t\t\t\t\t\t");
+
+	va_start(args, f);
+	vaf.fmt = f;
+	vaf.va = &args;
+	p->printfn(p, &vaf);
+	va_end(args);
+}
+EXPORT_SYMBOL(drm_printf_indent);
+
 #define DRM_PRINTK_FMT "[" DRM_NAME ":%s]%s %pV"
 
 void drm_dev_printk(const struct device *dev, const char *level,
diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h
index 7b9c86a6ca3e..73dcd16eca49 100644
--- a/include/drm/drm_print.h
+++ b/include/drm/drm_print.h
@@ -79,6 +79,8 @@ void __drm_printfn_debug(struct drm_printer *p, struct va_format *vaf);
 
 __printf(2, 3)
 void drm_printf(struct drm_printer *p, const char *f, ...);
+__printf(3, 4)
+void drm_printf_indent(struct drm_printer *p, unsigned int i, const char *f, ...);
 
 
 /**
-- 
2.14.2