release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/msm/mddihost_e.c

   1 /* Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License version 2 and
   5  * only version 2 as published by the Free Software Foundation.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program; if not, write to the Free Software
  14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  15  * 02110-1301, USA.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/slab.h>
  21 #include <linux/delay.h>
  22 #include <linux/mm.h>
  23 #include <linux/fb.h>
  24 #include <linux/init.h>
  25 #include <linux/ioport.h>
  26 #include <linux/device.h>
  27 #include <linux/dma-mapping.h>
  28
  29 #include "msm_fb.h"
  30 #include "mddihost.h"
  31 #include "mddihosti.h"
  32
  33 #include <linux/clk.h>
  34 #include <mach/clk.h>
  35
  36 extern struct semaphore mddi_host_mutex;
  37 static boolean mddi_host_ext_powered = FALSE;
  38
  39 void mddi_host_start_ext_display(void)
  40 {
  41         down(&mddi_host_mutex);
  42
  43         if (!mddi_host_ext_powered) {
  44                 mddi_host_init(MDDI_HOST_EXT);
  45
  46                 mddi_host_ext_powered = TRUE;
  47         }
  48
  49         up(&mddi_host_mutex);
  50 }
  51
  52 void mddi_host_stop_ext_display(void)
  53 {
  54         down(&mddi_host_mutex);
  55
  56         if (mddi_host_ext_powered) {
  57                 mddi_host_powerdown(MDDI_HOST_EXT);
  58
  59                 mddi_host_ext_powered = FALSE;
  60         }
  61
  62         up(&mddi_host_mutex);
  63 }