From: Michael Grzeschik <m.grzeschik@pengutronix.de>
Date: Tue, 23 Mar 2010 20:35:49 +0000 (-0700)
Subject: lxfb: set the H- and V-SYNC polarity of the flatpanel output
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b5c26f97ec4a17c650055c83cfc1f2ee6d8818eb;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

lxfb: set the H- and V-SYNC polarity of the flatpanel output

Fixup for the flatpanel output.  The geode_modedb attribute flags are used
to set the SYNC polarity of the flatpanel.  Without this patch our
flatpanel registers stayed unconfigured, so we just saw garbage output.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Cc: Andres Salomon <dilinger@collabora.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/video/geode/lxfb.h b/drivers/video/geode/lxfb.h
index cc781c00f75d..e4c4d89b7860 100644
--- a/drivers/video/geode/lxfb.h
+++ b/drivers/video/geode/lxfb.h
@@ -365,6 +365,8 @@ enum fp_registers {
 	FP_CRC, /* 0x458 */
 };
 
+#define FP_PT2_HSP			(1 << 22)
+#define FP_PT2_VSP			(1 << 23)
 #define FP_PT2_SCRC			(1 << 27)	/* shfclk free */
 
 #define FP_PM_P				(1 << 24)	/* panel power ctl */
diff --git a/drivers/video/geode/lxfb_ops.c b/drivers/video/geode/lxfb_ops.c
index 0e5d8c7c3eba..bc35a95e59d4 100644
--- a/drivers/video/geode/lxfb_ops.c
+++ b/drivers/video/geode/lxfb_ops.c
@@ -274,7 +274,15 @@ static void lx_graphics_enable(struct fb_info *info)
 		u32 msrlo, msrhi;
 
 		write_fp(par, FP_PT1, 0);
-		write_fp(par, FP_PT2, FP_PT2_SCRC);
+		temp = FP_PT2_SCRC;
+
+		if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
+			temp |= FP_PT2_HSP;
+
+		if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
+			temp |= FP_PT2_VSP;
+
+		write_fp(par, FP_PT2, temp);
 		write_fp(par, FP_DFC, FP_DFC_BC);
 
 		msrlo = MSR_LX_MSR_PADSEL_TFT_SEL_LOW;