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| author | Michael Hennerich <michael.hennerich@analog.com> | 2009-08-07 02:47:54 +0000 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2010-08-11 11:29:08 -0400 |
| commit | 5fc564eda7cc99a37fa485b452fdcc1260ee2d4f (patch) | |
| tree | f512cd78c677807673fa5ebdd789a2e80d3e151d /board/bf533-stamp/video.c | |
| parent | 69a2a4d9a5884a6f2d04a551308980d452b9b349 (diff) | |
| download | u-boot-imx-5fc564eda7cc99a37fa485b452fdcc1260ee2d4f.zip u-boot-imx-5fc564eda7cc99a37fa485b452fdcc1260ee2d4f.tar.gz u-boot-imx-5fc564eda7cc99a37fa485b452fdcc1260ee2d4f.tar.bz2 | |
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 'board/bf533-stamp/video.c')
| -rw-r--r-- | board/bf533-stamp/video.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/board/bf533-stamp/video.c b/board/bf533-stamp/video.c index 939bd35..75b8adc 100644 --- a/board/bf533-stamp/video.c +++ b/board/bf533-stamp/video.c @@ -150,6 +150,12 @@ static void video_init(char *NTSCFrame) bfin_write_PPI_CONTROL(0x0083); } +void video_stop(void) +{ + bfin_write_PPI_CONTROL(0); + bfin_write_DMA0_CONFIG(0); +} + int drv_video_init(void) { struct stdio_dev videodev; |