fbdev: sh_mobile_lcdc: Return display connection state in display_on

Return true if the display is connected and false otherwise. Set the fb
info state to FBINFO_STATE_SUSPENDED in the sh_mobile_lcdc driver when
the display is not connected.

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

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c
index 03ee3826fb62..5a19ef3f215c 100644
--- a/drivers/video/sh_mobile_lcdcfb.c
+++ b/drivers/video/sh_mobile_lcdcfb.c
@@ -338,8 +338,14 @@ static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
         struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg.panel_cfg;
 
         if (ch->tx_dev) {
-                if (ch->tx_dev->ops->display_on(ch->tx_dev) < 0)
+                int ret;
+
+                ret = ch->tx_dev->ops->display_on(ch->tx_dev);
+                if (ret < 0)
                         return;
+
+                if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
+                        ch->info->state = FBINFO_STATE_SUSPENDED;
         }
 
         /* HDMI must be enabled before LCDC configuration */