TDA4AL-Q1: How to modify the debug serial port

hello all

We use sdk 11.

Additional question: The EVM board has 16GB DDR, but the custom board only has 8GB (same DDR model). Where do I need to make modifications?

BR
liupt

Hi Peitao,

Are you using linux or RTOS?

Which is the SDK version you are using?

Regards

Gokul

HI GoKul

We use sdk11 & SPL linux&rtos

I had modify those files.

psdkla/board-support/ti-u-boot-2025.01+git/dts/upstream/src/arm64/ti/k3-j721s2-common-proc-board.dts

serial2 = &main_uart5;

psdkla/board-support/ti-u-boot-2025.01+git/arch/arm/dts/k3-j721s2-common-proc-board-u-boot.dtsi

-&main_uart8_pins_default {
- bootph-all;
-&main_uart8 {
- bootph-all;
-};

+&uart5_pins_default {
+ bootph-all;
+
+&main_uart5 {
+ bootph-all;
+};

psdkra/app_utils/utils/misc/src/app_pinmux_j721s2.c
add

static pinmuxPerCfg_t gUart5PinCfg[] =
{
    /* UART5 -> UART5_RXD -> AC24 */
    {
        PIN_MCAN12_RX, PIN_MODE(11) | \
        ((PIN_PULL_DISABLE | PIN_INPUT_ENABLE) & (~PIN_PULL_DIRECTION))
    },
    /* UART5 -> UART5_TXD -> W25 */
    {
        PIN_MCAN12_TX, PIN_MODE(11) | \
        ((PIN_PULL_DISABLE | PIN_INPUT_ENABLE) & (~PIN_PULL_DIRECTION))
    {PINMUX_END}
};

psdkla/board-support/ti-u-boot-2025.01+git/doc/board/ti/j721s2_evm.rst

export TFA_EXTRA_ARGS="K3_USART=0x8"---》export TFA_EXTRA_ARGS="K3_USART=0x5"

export OPTEE_EXTRA_ARGS="CFG_CONSOLE_UART=0x8" ---》export OPTEE_EXTRA_ARGS="CFG_CONSOLE_UART=0x5"

Previously, when there was a DDR issue, logs would be output(

).

However, after modifying the DDR configuration, there are no logs at all.

thank you

BR

liupt

Hi Peitao,

I will look into this and get back to you.

Regards

Gokul

Hi  Gokul 

I made the following modification:

+++ b/psdkla/board-support/trusted-firmware-a-2.12+git/plat/ti/k3/include/platform_def.h
@@ -90,7 +90,7 @@

/* Platform default console definitions */
#ifndef K3_USART_BASE
-#define K3_USART_BASE (0x02800000 + 0x10000 * K3_USART)
+#define K3_USART_BASE (0x28850000 + 0x10000 * K3_USART)

Now the serial port outputs logs  after power-on:

U-Boot SPL 2025.01-ti (Aug 20 2025 - 17:09:45 +0800)
SYSFW ABI: 4.0 (firmware rev 0x000b '11.0.9--v11.00.09+ (Fancy Rat)')
SPL initial stack usage: 13456 bytes
Trying to boot from MMC2
Skipping authentication on GP device
Skipping authentication on GP device
Skipping authentication on GP device
Skipping authentication on GP device
Skipping authentication on GP device
Loading Environment from nowhere... OK
Starting ATF on ARM64 core...

Then  got stuck, what else do I need to change?

BR

liupt