Add drm_puts() for a much faster path to print constant strings
into a drm_printer object with memcpy and friends. This can
shave seconds off of really large outputs such as GPU dumps.
If the drm_printer object supports a custom puts function then
use that otherwise fall back to the slower legacy printf call.
Signed-off-by: Jordan Crouse <jcro...@codeaurora.org>
---
drivers/gpu/drm/drm_print.c | 9 +++++++++
include/drm/drm_print.h | 2 ++
2 files changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c
index 03d1f98e5ac7..8fd489248a50 100644
--- a/drivers/gpu/drm/drm_print.c
+++ b/drivers/gpu/drm/drm_print.c
@@ -122,6 +122,15 @@ void __drm_printfn_debug(struct drm_printer *p, struct
va_format *vaf)
}
EXPORT_SYMBOL(__drm_printfn_debug);
+void drm_puts(struct drm_printer *p, const char *str)
+{
+ if (p->puts)
+ p->puts(p, str);
+ else
+ drm_printf(p, "%s", str);
+}
+EXPORT_SYMBOL(drm_puts);
+
/**
* drm_printf - print to a &drm_printer stream
* @p: the &drm_printer
diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h
index 0ea440fb5ec3..b16f4ecaa984 100644
--- a/include/drm/drm_print.h
+++ b/include/drm/drm_print.h
@@ -69,6 +69,7 @@
struct drm_printer {
/* private: */
void (*printfn)(struct drm_printer *p, struct va_format *vaf);
+ void (*puts)(struct drm_printer *p, const char *str);
void *arg;
const char *prefix;
};
@@ -80,6 +81,7 @@ 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, ...);
+void drm_puts(struct drm_printer *p, const char *str);
__printf(2, 0)
/**
--
2.17.1
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