fbdev: sh_mobile_lcdc: Fix overlay registers update during pan operation

Updating overlay registers require switching to overlay update mode.
This was correctly done when configuring the overlay format and size,
but not when updating the base address registers during pan operation.
Fix it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c
index d82c1dedc467..a5027099fb4c 100644
--- a/drivers/video/sh_mobile_lcdcfb.c
+++ b/drivers/video/sh_mobile_lcdcfb.c
@@ -1539,9 +1539,14 @@ static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
                 ovl->base_addr_c = base_addr_c;
         }
 
+        lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
+
         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
 
+        lcdc_write(ovl->channel->lcdc, LDBCR,
+                   LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
+
         ovl->pan_offset = pan_offset;
 
         return 0;