atmel_lcdfb: Adjust HFP calculation so it matches the manual.

In the AT91SAM9263 Manual the HFP part in LCDTIM2 is described as follows:
  * HFP: Horizontal Front Porch
  Number of idle LCDDOTCK cycles at the end of the line.
  Idle period is (HFP+2) LCDDOTCK cycles.

It is only a minor issue. I also changed all boards using atmel_lcdfb
I found to respect the new calculation.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c
index 244d55b7c0ae..7e66263b18c1 100644
--- a/drivers/video/atmel_lcdfb.c
+++ b/drivers/video/atmel_lcdfb.c
@@ -396,7 +396,7 @@ static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var,
         var->lower_margin = min_t(u32, var->lower_margin,
                         ATMEL_LCDC_VFP);
         var->right_margin = min_t(u32, var->right_margin,
-                        (ATMEL_LCDC_HFP >> ATMEL_LCDC_HFP_OFFSET) + 1);
+                        (ATMEL_LCDC_HFP >> ATMEL_LCDC_HFP_OFFSET) + 2);
         var->hsync_len = min_t(u32, var->hsync_len,
                         (ATMEL_LCDC_HPW >> ATMEL_LCDC_HPW_OFFSET) + 1);
         var->left_margin = min_t(u32, var->left_margin,
@@ -581,7 +581,7 @@ static int atmel_lcdfb_set_par(struct fb_info *info)
         lcdc_writel(sinfo, ATMEL_LCDC_TIM1, value);
 
         /* Horizontal timing */
-        value = (info->var.right_margin - 1) << ATMEL_LCDC_HFP_OFFSET;
+        value = (info->var.right_margin - 2) << ATMEL_LCDC_HFP_OFFSET;
         value |= (info->var.hsync_len - 1) << ATMEL_LCDC_HPW_OFFSET;
         value |= (info->var.left_margin - 1);
         dev_dbg(info->device, "  * LCDTIM2 = %08lx\n", value);