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authorBen Dooks <ben-linux@fluff.org>2007-10-16 01:28:39 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:43:14 -0700
commiteb78f9b3fa8532057d2a45acbe415b27ece6341b (patch)
tree0ad087338d6b29887533a20e97770a56ea4308ef /drivers/video/sm501fb.c
parentf22e521f2992031fdedb661f2a647cafd2e45fa1 (diff)
downloadlinux-eb78f9b3fa8532057d2a45acbe415b27ece6341b.tar.gz
sm501fb: Ensure panel interface is not tristated when setup
When we setup the panel interface whilst configuring the framebuffer, we should ensure the panel interface is not in tristate, in case the bootloader or previous setup has not enabled it. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/sm501fb.c')
-rw-r--r--drivers/video/sm501fb.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/video/sm501fb.c b/drivers/video/sm501fb.c
index d97edd7a6e4..1be95a68d69 100644
--- a/drivers/video/sm501fb.c
+++ b/drivers/video/sm501fb.c
@@ -777,6 +777,11 @@ static int sm501fb_set_par_pnl(struct fb_info *info)
writel(control, fbi->regs + SM501_DC_PANEL_CONTROL);
sm501fb_sync_regs(fbi);
+ /* ensure the panel interface is not tristated at this point */
+
+ sm501_modify_reg(fbi->dev->parent, SM501_SYSTEM_CONTROL,
+ 0, SM501_SYSCTRL_PANEL_TRISTATE);
+
/* power the panel up */
sm501fb_panel_power(fbi, 1);
return 0;