驱动勾选 CONFIG_VIDEO_SUNXI_TVD=y

board.dts 配置好tvd（可能已经配好了）：

/* tvd configuration used (create device, 0: do not create device, 1: create device) agc_auto_enable (0: agc manual mode,agc_manual_value is valid; 1: agc auto mode) agc_manual_value (agc manual value, default value is 64) cagc_enable (cagc 0: disable, 1: enable) fliter_used (3d fliter 0: disable, 1: enable) support two PMU power (tvd_power0, tvd_power1) support two GPIO power (tvd_gpio0, tvd_gpio1) NOTICE: If tvd need pmu power or gpio power,params need be configured under [tvd] tvd_sw (the switch of all tvd driver.) tvd_interface (0: cvbs, 1: ypbpr,) tvd_format (0:TVD_PL_YUV420 , 1: MB_YUV420, 2: TVD_PL_YUV422) tvd_system (0:ntsc, 1:pal) tvd_row (total row number in multi channel mode 1-2) tvd_column (total column number in multi channel mode 1-2) tvd_channelx_en (0:disable, 1~4:position in multi channel mode,In single channel mode,mean enable) tvd_row*tvd_column is the total tvd channel number to be used in multichannel mode +--------------------+--------------------+ | | | | | | | 1 | 2 | | | | | | | +--------------------+--------------------+ | | | | | | | 3 | 4 | | | | | | | +--------------------+--------------------+ */ &tvd { tvd_sw = <1>; tvd_interface = <0>; tvd_format = <0>; tvd_system = <1>; tvd_row = <1>; tvd_column = <1>; tvd_channel0_en = <1>; tvd_channel1_en = <0>; tvd_channel2_en = <0>; tvd_channel3_en = <0>; /*tvd_gpio0 = <&pio PD 22 GPIO_ACTIVE_HIGH>;*/ /*tvd_gpio1 = <&pio PD 23 GPIO_ACTIVE_HIGH>;*/ /*tvd_gpio2 = <&pio PD 24 GPIO_ACTIVE_HIGH>;*/ /* dc1sw-supply = <&reg_dc1sw>;*/ /* eldo3-supply = <&reg_eldo3>;*/ /*tvd_power0 = "dc1sw"*/ /*tvd_power1 = "eldo3"*/ }; &tvd0 { used = <1>; agc_auto_enable = <1>; agc_manual_value = <64>; cagc_enable = <1>; fliter_used = <1>; };

linux启动后会生成 /dev/video4：

root@TinaLinux:/# ls /dev/video4 /dev/video4

测试一吓：

root@TinaLinux:/# cat /dev/video4 [tvd] tvd_read:1857 tvd_read: tvd is not generating! cat: read error: Invalid argument

嗯，看日志应该就是TV输入了。

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