From: Daniel Drake Date: Sun, 14 Nov 2010 14:12:31 +0000 (+0000) Subject: lxfb: Program panel v/h sync output polarity correctly X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ad913da61aeb267ac99a649834a0cb1a963d7ec2;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git lxfb: Program panel v/h sync output polarity correctly Commit b5c26f97ec4a17c65 introduced some breakage for the OLPC XO-1 laptop, differences in the output video signal after the patch caused some problems with the XO's display controller chip. Reviewing of that commit against the AMD Geode LX Data Book, it seems that these bits were being set inversely. In both cases, active high output is denoted by a value of 0. See section 6.8.3.44 of the databook from February 2009 (Publication ID: 33234H) Signed-off-by: Daniel Drake Signed-off-by: Paul Mundt --- diff --git a/drivers/video/geode/lxfb_ops.c b/drivers/video/geode/lxfb_ops.c index bc35a95e59d4..85ec7f64c42a 100644 --- a/drivers/video/geode/lxfb_ops.c +++ b/drivers/video/geode/lxfb_ops.c @@ -276,10 +276,10 @@ static void lx_graphics_enable(struct fb_info *info) write_fp(par, FP_PT1, 0); temp = FP_PT2_SCRC; - if (info->var.sync & FB_SYNC_HOR_HIGH_ACT) + if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT)) temp |= FP_PT2_HSP; - if (info->var.sync & FB_SYNC_VERT_HIGH_ACT) + if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT)) temp |= FP_PT2_VSP; write_fp(par, FP_PT2, temp);