/************************************************************* * imx6 hdmi接口支持 * 新的板子需要使用到hdmi,今天就测试一下。 * 参考链接： * I.MX6 lcd lvds hdmi bootargs: * http://www.cnblogs.com/zengjfgit/p/5139546.html * hdmi问题： * https://community.freescale.com/thread/366072 * * Tony, 2016-5-20, Shenzhen **************************************************************/ 1、按照参考链接更改uboot/include/configs/mx6dl_sabresd_android.h #define CONFIG_INITRD_TAG #define CONFIG_EXTRA_ENV_SETTINGS "netdev=eth0 " "ethprime=FEC0 " "uboot=u-boot.bin " "kernel=uImage " "nfsroot=/opt/eldk/arm " "bootargs_base=setenv bootargs console=ttymxc0,115200 " "bootargs_nfs=setenv bootargs ${bootargs} root=/dev/nfs " "ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp " "bootcmd_net=run bootargs_base bootargs_nfs; " "tftpboot ${loadaddr} ${kernel}; bootm " "bootargs_mmc=setenv bootargs ${bootargs} ip=none " "root=/dev/mmcblk0p1 rootwait " "bootcmd_mmc=run bootargs_base bootargs_mmc; " "mmc dev 2; " "mmc read ${loadaddr} 0x800 0x3000; bootm " "bootcmd=run bootcmd_mmc " "bootargs=console=ttymxc0,115200 init=/init video=mxcfb0:off video=mxcfb1:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32 video=mxcfb2:off ldb=dul1 fbmem=10M,30M vmalloc=400M androidboot.console=ttymxc0 androidboot.hardware=freescale " "splashimage=0x30000000 " "splashpos=m,m " "lvds_num=1 " #endif 2. 更改uboot参数之后，并没有生效. 原因是bootargs采用了默认的参数。 bootcmd = run bootcmd_mmc bootcmd_mmc = run bootargs_base bootargs_mmc 在run bootargs_base 之后就不运行run bootargs_mmc 更改 "bootcmd_mmc=run bootargs_base bootargs_mmc; " 如下：
"bootcmd_mmc=run bootargs_mmc; " qt版本的目前不能同时支持2个屏，只能支持一种屏。qt只能支持配置一个framebuffer,参考/etc/profile. 配置成功之后,kernel输出： Uncompressing Linux... done, booting the kernel. ...... Kernel command line: console=ttymxc0,115200 init=/init video=mxcfb0:off video=mxcfb1:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32 video=mxcfb2:off ldb=dul1 fbmem=10M,30M vmalloc=400M androidboot.console=ttymxc0 androidboot.hardware=freescale ip=none root=/dev/mmcblk0p1 rootwait ......
3.问题 hdmi其中之后, 在串口一直输出： mxc_hdmi mxc_hdmi: same edid mxc_hdmi mxc_hdmi: same edid mxc_hdmi mxc_hdmi: same edid mxc_hdmi mxc_hdmi: same edid 根据参考链接得知，HDMI的线没有插好。