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Date: Sat, 12 Sep 2009 01:03:40 +0200
From: Miguel Boton <waninkoko@...il.com>
To: linux-kernel@...r.kernel.org
Subject: [PATCH] logo: random logo selection option
If we select more than one logo in the kernel configuration, only the 'latest' one gets
displayed. Because of this the other logos do not ever have a chance to be displayed.
This patch adds a selectable option to display a random logo during the bootup process.
This way the kernel will be able to display any available logo, making the bootup process
a little different every time ;)
Signed-off-by: Miguel Boton <mboton@...il.com>
--
drivers/video/logo/Kconfig | 8 +++
drivers/video/logo/logo.c | 113 +++++++++++++++++++++++++------------------
2 files changed, 74 insertions(+), 47 deletions(-)
diff --git a/drivers/video/logo/Kconfig b/drivers/video/logo/Kconfig
index 39ac49e..8b79ef5 100644
--- a/drivers/video/logo/Kconfig
+++ b/drivers/video/logo/Kconfig
@@ -15,6 +15,15 @@ config FB_LOGO_EXTRA
depends on FB=y
default y if SPU_BASE
+config LOGO_RANDOM
+ bool "Select random available logo"
+ default n
+ help
+ This option enables random logo selection from available logos
+ during the bootup process.
+
+comment "Available logos"
+
config LOGO_LINUX_MONO
bool "Standard black and white Linux logo"
default y
diff --git a/drivers/video/logo/logo.c b/drivers/video/logo/logo.c
index ea7a8cc..f90c21b 100644
--- a/drivers/video/logo/logo.c
+++ b/drivers/video/logo/logo.c
@@ -13,6 +13,10 @@
#include <linux/stddef.h>
#include <linux/module.h>
+#ifdef CONFIG_LOGO_RANDOM
+#include <linux/random.h>
+#endif
+
#ifdef CONFIG_M68K
#include <asm/setup.h>
#endif
@@ -25,82 +29,97 @@ static int nologo;
module_param(nologo, bool, 0);
MODULE_PARM_DESC(nologo, "Disables startup logo");
-/* logo's are marked __initdata. Use __init_refok to tell
- * modpost that it is intended that this function uses data
- * marked __initdata.
- */
-const struct linux_logo * __init_refok fb_find_logo(int depth)
-{
- const struct linux_logo *logo = NULL;
-
- if (nologo)
- return NULL;
-
- if (depth >= 1) {
+/* Monochromatic logos */
+static const struct linux_logo *logo_mono[] = {
#ifdef CONFIG_LOGO_LINUX_MONO
- /* Generic Linux logo */
- logo = &logo_linux_mono;
+ &logo_linux_mono, /* Generic Linux logo */
#endif
#ifdef CONFIG_LOGO_SUPERH_MONO
- /* SuperH Linux logo */
- logo = &logo_superh_mono;
+ &logo_superh_mono, /* SuperH Linux logo */
#endif
- }
-
- if (depth >= 4) {
+};
+
+/* 16-colour logos */
+static const struct linux_logo *logo_vga16[] = {
#ifdef CONFIG_LOGO_LINUX_VGA16
- /* Generic Linux logo */
- logo = &logo_linux_vga16;
+ &logo_linux_vga16, /* Generic Linux logo */
#endif
#ifdef CONFIG_LOGO_BLACKFIN_VGA16
- /* Blackfin processor logo */
- logo = &logo_blackfin_vga16;
+ &logo_blackfin_vga16, /* Blackfin processor logo */
#endif
#ifdef CONFIG_LOGO_SUPERH_VGA16
- /* SuperH Linux logo */
- logo = &logo_superh_vga16;
+ &logo_superh_vga16, /* SuperH Linux logo */
#endif
- }
-
- if (depth >= 8) {
+};
+
+/* 224-colour logos */
+static const struct linux_logo *logo_clut224[] = {
#ifdef CONFIG_LOGO_LINUX_CLUT224
- /* Generic Linux logo */
- logo = &logo_linux_clut224;
+ &logo_linux_clut224, /* Generic Linux logo */
#endif
#ifdef CONFIG_LOGO_BLACKFIN_CLUT224
- /* Blackfin Linux logo */
- logo = &logo_blackfin_clut224;
+ &logo_blackfin_clut224, /* Blackfin Linux logo */
#endif
#ifdef CONFIG_LOGO_DEC_CLUT224
- /* DEC Linux logo on MIPS/MIPS64 or ALPHA */
- logo = &logo_dec_clut224;
+ &logo_dec_clut224, /* DEC Linux logo on MIPS/MIPS64 or ALPHA */
#endif
#ifdef CONFIG_LOGO_MAC_CLUT224
- /* Macintosh Linux logo on m68k */
- if (MACH_IS_MAC)
- logo = &logo_mac_clut224;
+ &logo_mac_clut224, /* Macintosh Linux logo on m68k */
#endif
#ifdef CONFIG_LOGO_PARISC_CLUT224
- /* PA-RISC Linux logo */
- logo = &logo_parisc_clut224;
+ &logo_parisc_clut224, /* PA-RISC Linux logo */
#endif
#ifdef CONFIG_LOGO_SGI_CLUT224
- /* SGI Linux logo on MIPS/MIPS64 and VISWS */
- logo = &logo_sgi_clut224;
+ &logo_sgi_clut224, /* SGI Linux logo on MIPS/MIPS64 and VISWS */
#endif
#ifdef CONFIG_LOGO_SUN_CLUT224
- /* Sun Linux logo */
- logo = &logo_sun_clut224;
+ &logo_sun_clut224, /* Sun Linux logo */
#endif
#ifdef CONFIG_LOGO_SUPERH_CLUT224
- /* SuperH Linux logo */
- logo = &logo_superh_clut224;
+ &logo_superh_clut224, /* SuperH Linux logo */
#endif
#ifdef CONFIG_LOGO_M32R_CLUT224
- /* M32R Linux logo */
- logo = &logo_m32r_clut224;
+ &logo_m32r_clut224, /* M32R Linux logo */
#endif
+};
+
+#ifdef CONFIG_LOGO_RANDOM
+#define LOGO_INDEX(s) (get_random_int() % s)
+#else
+#define LOGO_INDEX(s) (s - 1)
+#endif
+
+/* logo's are marked __initdata. Use __init_refok to tell
+ * modpost that it is intended that this function uses data
+ * marked __initdata.
+ */
+const struct linux_logo * __init_refok fb_find_logo(int depth)
+{
+ const struct linux_logo *logo = NULL;
+ const struct linux_logo **array = NULL;
+ unsigned int size;
+
+ if (nologo)
+ return NULL;
+
+ /* Select logo array */
+ if (depth >= 1) {
+ array = logo_mono;
+ size = ARRAY_SIZE(logo_mono);
+ }
+ if (depth >= 4) {
+ array = logo_vga16;
+ size = ARRAY_SIZE(logo_vga16);
+ }
+ if (depth >= 8) {
+ array = logo_clut224;
+ size = ARRAY_SIZE(logo_clut224);
}
+
+ /* We've got some logos to display */
+ if (array && size)
+ logo = array[LOGO_INDEX(size)];
+
return logo;
}
EXPORT_SYMBOL_GPL(fb_find_logo);
--
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