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authorMichael Hennerich <michael.hennerich@analog.com>2009-08-07 02:47:54 +0000
committerMike Frysinger <vapier@gentoo.org>2010-08-11 11:29:08 -0400
commit5fc564eda7cc99a37fa485b452fdcc1260ee2d4f (patch)
treef512cd78c677807673fa5ebdd789a2e80d3e151d /arch/blackfin/lib/boot.c
parent69a2a4d9a5884a6f2d04a551308980d452b9b349 (diff)
downloadu-boot-linaro-stable-5fc564eda7cc99a37fa485b452fdcc1260ee2d4f.tar.gz
Blackfin: shutdown video DMA when booting Linux
In case there is no frame buffer driver present in Linux to hand over the PPI LCD DMA upon boot, the DMA initiated by u-boot to display the splash screen runs unattended. Therefore always stop the video driver in u-boot before starting Linux. If people don't want this behavior, then they can simply stub out the video_stop() function in their board video driver. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/lib/boot.c')
-rw-r--r--arch/blackfin/lib/boot.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/blackfin/lib/boot.c b/arch/blackfin/lib/boot.c
index 37aa82a05..768a8826b 100644
--- a/arch/blackfin/lib/boot.c
+++ b/arch/blackfin/lib/boot.c
@@ -18,6 +18,10 @@
extern void swap_to(int device_id);
#endif
+#ifdef CONFIG_VIDEO
+extern void video_stop(void);
+#endif
+
static char *make_command_line(void)
{
char *dest = (char *)CONFIG_LINUX_CMDLINE_ADDR;
@@ -45,6 +49,11 @@ int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *ima
swap_to(FLASH);
#endif
+#ifdef CONFIG_VIDEO
+ /* maybe this should be standardized and moved to bootm ... */
+ video_stop();
+#endif
+
appl = (int (*)(char *))images->ep;
printf("Starting Kernel at = %p\n", appl);