ENGR00296050 mxsfb: fb failed to work after suspend in console mode

When device boot into console, frame buffer failed to work after
suspend/resume.
That is caused by LCDIF IP lost all registers configuration
in suspend mode, and console didn't reconfiguration fb after resume.
Same issue didn't found with Yocto UI.
Reinitialize frame buffer driver after resume to fix the issue.

Signed-off-by: Sandor Yu <R01008@freescale.com>

diff --git a/drivers/video/fbdev/mxsfb.c b/drivers/video/fbdev/mxsfb.c
index 09bfd79748f9b1f9138d5127e34c426716e5090e..5e5901403e5b62c47bf53a2bf87a0da6f2de1cbc 100644 (file)
--- a/drivers/video/fbdev/mxsfb.c
+++ b/drivers/video/fbdev/mxsfb.c
@@ -4,7 +4,7 @@
  * This code is based on:
  * Author: Vitaly Wool <vital@embeddedalley.com>
  *
- * Copyright 2008-2013 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008-2014 Freescale Semiconductor, Inc. All Rights Reserved.
  * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or
@@ -358,6 +358,9 @@ static void mxsfb_enable_controller(struct fb_info *fb_info)
        clk_prepare_enable(host->clk_pix);
        clk_set_rate(host->clk_pix, PICOS2KHZ(fb_info->var.pixclock) * 1000U);
 
+       /* Clean soft reset and clock gate bit if it was enabled  */
+       writel(CTRL_SFTRST | CTRL_CLKGATE, host->base + LCDC_CTRL + REG_CLR);
+
        /* if it was disabled, re-enable the mode again */
        writel(CTRL_DOTCLK_MODE, host->base + LCDC_CTRL + REG_SET);
 
@@ -587,6 +590,7 @@ static int mxsfb_blank(int blank, struct fb_info *fb_info)
        case FB_BLANK_UNBLANK:
                if (!host->enabled)
                        mxsfb_enable_controller(fb_info);
+               mxsfb_set_par(&host->fb_info);
                break;
        }
        return 0;