转载:TCC88XX支持双屏显示的方法

 

软硬件:[SDK_2308_20111028][TCC8801F_D2_08x4_SV6.3]VIDEO DUAL DISPLAY(LCD+HDMI/LCD+CVBS)

==========================================================

 

1. Tcc_used_mem_tcc8800.h (z:\gingerbreadrel\bootable\bootloader\lk\include\arch) 文件中打开宏定义" #define VIDEO_DUAL_DISPLAY ", 以此获得需要的Memory;(不知道为什么, 最好还是一起打开" #define USE_CAMERA ")

 

//#define USE_VIQE

#define USE_CAMERA

#ifdef _M803_

#define USE_LVDS

#else

//#define USE_LVDS

#endif

#define VIDEO_DUAL_DISPLAY

//#define USE_CC_UI_LAYER

/* Memory Allocations */

 

2. Z:\gingerbreadRel\device\telechips\tcc8800\device.mk 文件添加prop变量" persist.sys.video_daul_display = 1 "

 

DEVICE_PACKAGE_OVERLAYS := device/telechips/tcc8800/overlay

PRODUCT_PROPERTY_OVERRIDES += \

persist.sys.video_daul_display = 1

$(call inherit-product, device/telechips/tcc8800/device_base.mk)

 

这个" persist.sys.video_daul_display  "是我在TCCRendererOutHw.cpp (mywork\gingerbreaddev\hardware\telechips\common\stagefright\libstagefrighthw) 文件中发现的, 如下面蓝色部分代码:

 

int TCCRendererOutHw::initDevice()

{

..............................................................................

..............................................................................

// select video display output module : LCD, HDMI, COMPOSITE, COMPONENT , DUAL..

pMParm->mOutputMode = 0; //lcd mode

if(pMParm->mHDMIOutput || pMParm->mComponentOutput || pMParm->mCompositeOutput)

{

int dual_display;

property_get("persist.sys.video_daul_display", value, "0");

dual_display = atoi(value);

if(dual_display)

pMParm->mOutputMode  = 2;

else

pMParm->mOutputMode  = 1;

}

LOGI("initDevice pMParm->mOutputMode:%d pMParm->mHDMIOutput[%d] pMParm->mComponentOutput[%d] || pMParm->mCompositeOutput[%d]",pMParm->mOutputMode  ,pMParm->mHDMIOutput, pMParm->mComponentOutput, pMParm->mCompositeOutput) ;

.......................................................................................

.......................................................................................

}

 

3. TCC7801,TCC7901,TCC89XX,TCC88XX发展这么多代了, M2MSCALER控制器都一直只有两个通道(channel). 如果VIDEO DUAL DISPLAY(HDMI/CVBS) , 那么两个通道的M2MSCALER都被用给了Video播放; 因此我们不能Android UI显示在TV(HDMI/CVBS)上. 所以需要做下面的修改:

 

Tccfb.c (z:\gingerbreadrel\kernel\drivers\video\tcc) 文件中添加宏定义:

 

#include <mach/tca_fb_hdmi.h>

#include <mach/tca_fb_output.h>

#include <mach/tca_lcdc.h>

#include <linux/console.h>

#define CONFIG_TCC_HDMI_UI_DISPLAY_OFF //-->不让Android UI在TV上显示

#ifdef TCC_VIDEO_DISPLAY_DEINTERLACE_MODE

#include "tcc_viqe_interface.h"

#endif

本文转载自：

http://user.qzone.qq.com/26290056/blog/1322191324?ptlang=2052&ADUIN=610319252&ADSESSION=1322524711&ADTAG=CLIENT.QQ.3847_FriendTip_QzoneFolder.0#!