[U-Boot] [RFC 1/1] splash: display splash in DM_VIDEO configurations

[Igor Opaniuk]

Currently for CONFIG_DM_VIDEO=y setting splashimage env variable doesn't
have any effect. Introduce a common function for both dm-video/lcd stacks,
that checks env("splashimage") and invokes bmp_display() accordingly.
For additional details please check discussion [1].

[1] https://lists.denx.de/pipermail/u-boot/2019-May/371002.html

Signed-off-by: Igor Opaniuk <igor.opaniuk at toradex.com>
---
 common/lcd.c     | 10 +++-------
 common/splash.c  | 16 ++++++++++++++--
 common/stdio.c   |  4 ++++
 include/splash.h |  6 +++---
 4 files changed, 24 insertions(+), 12 deletions(-)

diff --git a/common/lcd.c b/common/lcd.c
index 95526b1e17..1c5d8adb47 100644
--- a/common/lcd.c
+++ b/common/lcd.c
@@ -222,14 +222,10 @@ void lcd_clear(void)
 	/* Paint the logo and retrieve LCD base address */
 	debug("[LCD] Drawing the logo...\n");
 	if (do_splash) {
-		s = env_get("splashimage");
-		if (s) {
+		if (splash_show() == 0) {
 			do_splash = 0;
-			addr = simple_strtoul(s, NULL, 16);
-			if (lcd_splash(addr) == 0) {
-				lcd_sync();
-				return;
-			}
+			lcd_sync();
+			return;
 		}
 	}
 
diff --git a/common/splash.c b/common/splash.c
index d251b3b654..f026390393 100644
--- a/common/splash.c
+++ b/common/splash.c
@@ -80,11 +80,23 @@ void splash_get_pos(int *x, int *y)
 }
 #endif /* CONFIG_SPLASH_SCREEN_ALIGN */
 
-#if defined(CONFIG_SPLASH_SCREEN) && defined(CONFIG_LCD)
-int lcd_splash(ulong addr)
+/*
+ * Common function to show a splash image if env("splashimage") is set.
+ * Is used for both dm_video and lcd video stacks. For additional
+ * details please refer to doc/README.splashprepare.
+ */
+#if defined(CONFIG_SPLASH_SCREEN)
+int splash_display(void)
 {
+	ulong addr;
+	char *s;
 	int x = 0, y = 0, ret;
 
+	s = env_get("splashimage");
+	if (!s)
+		return -EINVAL;
+
+	addr = simple_strtoul(s, NULL, 16);
 	ret = splash_screen_prepare();
 	if (ret)
 		return ret;
diff --git a/common/stdio.c b/common/stdio.c
index ee22c1fd58..22de7aa491 100644
--- a/common/stdio.c
+++ b/common/stdio.c
@@ -16,6 +16,7 @@
 #include <malloc.h>
 #include <stdio_dev.h>
 #include <serial.h>
+#include <splash.h>
 
 #if defined(CONFIG_SYS_I2C)
 #include <i2c.h>
@@ -366,6 +367,9 @@ int stdio_add_devices(void)
 	if (ret)
 		printf("%s: Video device failed (ret=%d)\n", __func__, ret);
 #endif /* !CONFIG_SYS_CONSOLE_IS_IN_ENV */
+#ifdef CONFIG_SPLASH_SCREEN
+	splash_display();
+#endif /* CONFIG_SPLASH_SCREEN */
 #else
 # if defined(CONFIG_LCD)
 	drv_lcd_init ();
diff --git a/include/splash.h b/include/splash.h
index 228aff441b..4ed8d60325 100644
--- a/include/splash.h
+++ b/include/splash.h
@@ -66,10 +66,10 @@ void splash_get_pos(int *x, int *y);
 static inline void splash_get_pos(int *x, int *y) { }
 #endif
 
-#if defined(CONFIG_SPLASH_SCREEN) && defined(CONFIG_LCD)
-int lcd_splash(ulong addr);
+#ifdef CONFIG_SPLASH_SCREEN
+int splash_display(void);
 #else
-static inline int lcd_splash(ulong addr)
+static inline int splash_display(void)
 {
 	return -ENOSYS;
 }
-- 
2.17.1