When LCD/HDMI is connected to LS1021ATWR or LS1021AQDS, the console output should be shown on the monitor.

If CONFIG_DM_SERIAL and CONFIG_DM_STDIO are both enabled, serial device is registered and added to the stdio list in serial-uclass.c. Then, vga device will be registered and added to the stdio list in cfb_console.c. So serial device is at the head of the stdio list and will be chosen as the input and output device in console_init_r(). It will cause the console output can't be shown on the monitor.

If CONFIG_DM_STDIO is disabled when using CONFIG_DM_SERIAL. First, vga device is registered and added to the stdio list in cfb_console.c. Then serial device will be registered and added to the stdio list in drv_system_init(). So vga device is at the head of the stdio list and will be chosen as the input and output device in console_init_r(). The console output will be shown on the monitor.

The patch is to disabled CONFIG_DM_STDIO for LCD/HDMI display.

Signed-off-by: Alison Wang alison.wang@nxp.com --- include/configs/ls1021aqds.h | 4 ++++ include/configs/ls1021atwr.h | 4 ++++ 2 files changed, 8 insertions(+)

diff --git a/include/configs/ls1021aqds.h b/include/configs/ls1021aqds.h index ff5ca22..fbb1f46 100644 --- a/include/configs/ls1021aqds.h +++ b/include/configs/ls1021aqds.h @@ -384,6 +384,10 @@ unsigned long get_board_ddr_clk(void);

#define CONFIG_BAUDRATE 115200

+#ifdef CONFIG_DM_SERIAL +#undef CONFIG_DM_STDIO +#endif + /* * I2C */ diff --git a/include/configs/ls1021atwr.h b/include/configs/ls1021atwr.h index 166061d..9054774 100644 --- a/include/configs/ls1021atwr.h +++ b/include/configs/ls1021atwr.h @@ -280,6 +280,10 @@

#define CONFIG_BAUDRATE 115200

+#ifdef CONFIG_DM_SERIAL +#undef CONFIG_DM_STDIO +#endif + /* * I2C */