Fw: [PATCH] disable logo at boot
From: Randy Dunlap <hidden>
Date: 2007-08-01 22:44:12
any interest in this? or is there some other way to do this that I missed? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Date: Thu, 12 Jul 2007 13:37:45 -0700 From: Randy Dunlap <redacted> Add logo.nologo kernel boot option to disable the logo in order to provide more screen space for kernel messages; especially useful when debugging and screen space is more critical. newport_con driver changes are untested. Signed-off-by: Randy Dunlap <redacted> --- Documentation/kernel-parameters.txt | 5 +++++ drivers/video/console/newport_con.c | 20 ++++++++++++++------ drivers/video/logo/logo.c | 6 ++++++ 3 files changed, 25 insertions(+), 6 deletions(-)
--- linux-2.6.22.orig/Documentation/kernel-parameters.txt
+++ linux-2.6.22/Documentation/kernel-parameters.txt@@ -900,6 +900,11 @@ and is between 256 and 4096 characters. n must be a power of two. The default size is set in the kernel config file. + logo.nologo [FB] Disables display of the built-in Linux logo. + This may be used to provide more screen space for + kernel log messages and is useful when debugging + kernel boot problems. + lp=0 [LP] Specify parallel ports to use, e.g, lp=port[,port...] lp=none,parport0 (lp0 not configured, lp1 uses lp=reset first parallel port). 'lp=0' disables the --- linux-2.6.22.orig/drivers/video/logo/logo.c +++ linux-2.6.22/drivers/video/logo/logo.c
@@ -34,11 +34,17 @@ extern const struct linux_logo logo_supe extern const struct linux_logo logo_superh_clut224; extern const struct linux_logo logo_m32r_clut224; +int nologo; +module_param(nologo, bool, 0); +MODULE_PARM_DESC(nologo, "Disables startup logo"); const struct linux_logo *fb_find_logo(int depth) { const struct linux_logo *logo = NULL; + if (nologo) + return NULL; + if (depth >= 1) { #ifdef CONFIG_LOGO_LINUX_MONO /* Generic Linux logo */ --- linux-2.6.22.orig/drivers/video/console/newport_con.c +++ linux-2.6.22/drivers/video/console/newport_con.c
@@ -98,14 +98,19 @@ static inline void newport_init_cmap(voi } } -static void newport_show_logo(void) +static struct linux_logo * newport_show_logo(void) { #ifdef CONFIG_LOGO_SGI_CLUT224 const struct linux_logo *logo = fb_find_logo(8); - const unsigned char *clut = logo->clut; - const unsigned char *data = logo->data; + const unsigned char *clut; + const unsigned char *data; unsigned long i; + if (!logo) + return NULL; + *clut = logo->clut; + *data = logo->data; + for (i = 0; i < logo->clutsize; i++) { newport_bfwait(npregs); newport_cmap_setaddr(npregs, i + 0x20);
@@ -123,6 +128,8 @@ static void newport_show_logo(void) for (i = 0; i < logo->width*logo->height; i++) npregs->go.hostrw0 = *data++ << 24; + + return logo; #endif /* CONFIG_LOGO_SGI_CLUT224 */ }
@@ -465,9 +472,10 @@ static int newport_switch(struct vc_data npregs->cset.topscan = 0x3ff; if (!logo_drawn) { - newport_show_logo(); - logo_drawn = 1; - logo_active = 1; + if (newport_show_logo()) { + logo_drawn = 1; + logo_active = 1; + } } return 1; -------------------------------------------------------------------------
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