ENGR00298274 hdmi: add zero check for hdmi audio pixel clock setting

Pixel clock may not initialized in the struct of fb_var_screeninfo
when video mode timing setting by user.
Add pixel clock zero check in hdmi audio clock update function
to avoid division by zero.

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

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/mfd/mxc-hdmi-core.c b/drivers/mfd/mxc-hdmi-core.c
index 2b0853c0375d..52dc5ef665b5 100644
--- a/drivers/mfd/mxc-hdmi-core.c
+++ b/drivers/mfd/mxc-hdmi-core.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
+ * Copyright (C) 2011-2014 Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -547,6 +547,8 @@ EXPORT_SYMBOL(hdmi_init_clk_regenerator);
 void hdmi_clk_regenerator_update_pixel_clock(u32 pixclock)
 {
 
+        if (!pixclock)
+                return;
         /* Translate pixel clock in ps (pico seconds) to Hz  */
         pixel_clk_rate = PICOS2KHZ(pixclock) * 1000UL;
         hdmi_set_clk_regenerator();