sh: add a start_transfer() callback to the LCDC driver

This patch adds a ->start_transfer() callback to the
driver sh_mobile_lcdcfb.c. The callback is used to
program the LCDC panel in the case of one-shot mode.

Needed by the LCD controller used on the KFR2R09 board.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 11 insertions, 1 deletions

diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c
index b4b5de930cf5..d346bbab6cad 100644
--- a/drivers/video/sh_mobile_lcdcfb.c
+++ b/drivers/video/sh_mobile_lcdcfb.c
@@ -281,6 +281,7 @@ static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
                                        struct list_head *pagelist)
 {
         struct sh_mobile_lcdc_chan *ch = info->par;
+        struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
 
         /* enable clocks before accessing hardware */
         sh_mobile_lcdc_clk_on(ch->lcdc);
@@ -305,10 +306,17 @@ static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
 
                 /* trigger panel update */
                 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
+                if (bcfg->start_transfer)
+                        bcfg->start_transfer(bcfg->board_data, ch,
+                                             &sh_mobile_lcdc_sys_bus_ops);
                 lcdc_write_chan(ch, LDSM2R, 1);
                 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
-        } else
+        } else {
+                if (bcfg->start_transfer)
+                        bcfg->start_transfer(bcfg->board_data, ch,
+                                             &sh_mobile_lcdc_sys_bus_ops);
                 lcdc_write_chan(ch, LDSM2R, 1);
+        }
 }
 
 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
diff --git a/include/video/sh_mobile_lcdc.h b/include/video/sh_mobile_lcdc.h
index 25144ab22b95..288205457713 100644
--- a/include/video/sh_mobile_lcdc.h
+++ b/include/video/sh_mobile_lcdc.h
@@ -50,6 +50,8 @@ struct sh_mobile_lcdc_board_cfg {
         void *board_data;
         int (*setup_sys)(void *board_data, void *sys_ops_handle,
                          struct sh_mobile_lcdc_sys_bus_ops *sys_ops);
+        void (*start_transfer)(void *board_data, void *sys_ops_handle,
+                               struct sh_mobile_lcdc_sys_bus_ops *sys_ops);
         void (*display_on)(void *board_data);
         void (*display_off)(void *board_data);
 };