[U-Boot] [PATCH] Revert "console: simplify puts()"

[Soeren Moch]

This reverts commit c61d0009feb966e0e93254a8c435a1889085e6b8.

A tbs2910 board user reported a very slow console frambuffer as
regression in current u-boot. I could bisect this down to the
above mentioned commit.

This revert brings back the fast framebuffer console (one
cache flush per string in puts(), not after each char).

Reported-by: Uwe Scheffler <scheffler.u at web.de>
Signed-off-by: Soeren Moch <smoch at web.de>
---
Cc: Masahiro Yamada <yamada.masahiro at socionext.com>
Cc: Simon Glass <sjg at chromium.org>
Cc: Tom Rini <trini at konsulko.com>
Cc: Uwe Scheffler <scheffler.u at web.de>
Cc: u-boot at lists.denx.de

Tom,
can you pull this in as fix for 2017.11?

Thanks,
Soeren
---
 common/console.c | 44 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 42 insertions(+), 2 deletions(-)

diff --git a/common/console.c b/common/console.c
index f83528c..d763f2c 100644
--- a/common/console.c
+++ b/common/console.c
@@ -450,6 +450,12 @@ static void pre_console_putc(const char c)
 	unmap_sysmem(buffer);
 }
 
+static void pre_console_puts(const char *s)
+{
+	while (*s)
+		pre_console_putc(*s++);
+}
+
 static void print_pre_console_buffer(int flushpoint)
 {
 	unsigned long in = 0, out = 0;
@@ -477,6 +483,7 @@ static void print_pre_console_buffer(int flushpoint)
 }
 #else
 static inline void pre_console_putc(const char c) {}
+static inline void pre_console_puts(const char *s) {}
 static inline void print_pre_console_buffer(int flushpoint) {}
 #endif
 
@@ -518,8 +525,41 @@ void putc(const char c)
 
 void puts(const char *s)
 {
-	while (*s)
-		putc(*s++);
+#ifdef CONFIG_DEBUG_UART
+	if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
+		while (*s) {
+			int ch = *s++;
+
+			printch(ch);
+		}
+		return;
+	}
+#endif
+#ifdef CONFIG_CONSOLE_RECORD
+	if (gd && (gd->flags & GD_FLG_RECORD) && gd->console_out.start)
+		membuff_put(&gd->console_out, s, strlen(s));
+#endif
+#ifdef CONFIG_SILENT_CONSOLE
+	if (gd->flags & GD_FLG_SILENT)
+		return;
+#endif
+
+#ifdef CONFIG_DISABLE_CONSOLE
+	if (gd->flags & GD_FLG_DISABLE_CONSOLE)
+		return;
+#endif
+
+	if (!gd->have_console)
+		return pre_console_puts(s);
+
+	if (gd->flags & GD_FLG_DEVINIT) {
+		/* Send to the standard output */
+		fputs(stdout, s);
+	} else {
+		/* Send directly to the handler */
+		pre_console_puts(s);
+		serial_puts(s);
+	}
 }
 
 #ifdef CONFIG_CONSOLE_RECORD
-- 
2.7.4