[RFC][PATCH] lxfb: Set the H- and V-SYNC polarity of the flatpanel output
Michael Grzeschik
m.grzeschik at pengutronix.de
Sat Mar 6 14:47:58 EST 2010
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 at pengutronix.de>
---
drivers/video/geode/lxfb.h | 2 ++
drivers/video/geode/lxfb_ops.c | 10 +++++++++-
2 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/drivers/video/geode/lxfb.h b/drivers/video/geode/lxfb.h
index cc781c0..e4c4d89 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 0e5d8c7..bc35a95 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;
--
1.6.6
More information about the Linux-geode
mailing list