Log from speaker-test -r 48000 -F S16_LE -c 2 -twav -D plughw:CAARD=tegrasndt210ref,DEV=0 :
speaker-test 1.1.3
Playback device is plughw:CARD=tegrasndt210ref,DEV=0
Stream parameters are 48000Hz, S16_LE, 2 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 32 to 8192
Period size range from 32 to 4096
Using max buffer size 8192
Periods = 4
was set period_size = 2048
was set buffer_size = 8192
0 - Front Left
1 - Front Right
Time per period = 2,860507
0 - Front Left
1 - Front Right
Time per period = 3,026817
0 - Front Left
1 - Front Right
Time per period = 2,988541
0 - Front Left
1 - Front Right
The output of sudo grep dap4 /sys/kernel/debug/tegra_pinctrl_reg :
Bank: 1 Reg: 0x70003144 Val: 0x00000044 -> dap4_fs_pj4
Bank: 1 Reg: 0x70003148 Val: 0x00000054 -> dap4_din_pj5
Bank: 1 Reg: 0x7000314c Val: 0x00000004 -> dap4_dout_pj6
Bank: 1 Reg: 0x70003150 Val: 0x00000044 -> dap4_sclk_pj7
The output of sudo cat /sys/kernel/debug/tegra_gpio :
Name:Bank:Port CNF OE OUT IN INT_STA INT_ENB INT_LVL
A: 0:0 64 40 40 04 00 00 000000
B: 0:1 f0 00 00 80 00 00 000000
C: 0:2 1f 00 00 18 00 00 000000
D: 0:3 00 00 00 00 00 00 000000
E: 1:0 40 00 00 00 00 00 000000
F: 1:1 00 00 00 00 00 00 000000
G: 1:2 0c 00 00 04 00 00 000000
H: 1:3 fd 99 00 60 00 00 000000
I: 2:0 07 07 03 02 00 00 000000
J: 2:1 f0 00 00 10 00 00 000000
K: 2:2 00 00 00 00 00 00 000000
L: 2:3 00 00 00 00 00 00 000000
M: 3:0 00 00 00 00 00 00 000000
N: 3:1 00 00 00 00 00 00 000000
O: 3:2 00 00 00 00 00 00 000000
P: 3:3 00 00 00 00 00 00 000000
Q: 4:0 00 00 00 00 00 00 000000
R: 4:1 00 00 00 00 00 00 000000
S: 4:2 a0 80 00 00 00 00 000000
T: 4:3 01 01 00 00 00 00 000000
U: 5:0 00 00 00 00 00 00 000000
V: 5:1 01 00 00 00 00 00 000000
W: 5:2 00 00 00 00 00 00 000000
X: 5:3 78 08 08 70 00 60 606000
Y: 6:0 06 00 00 02 00 00 000000
Z: 6:1 0f 08 08 04 00 06 020600
AA: 6:2 00 00 00 00 00 00 000000
BB: 6:3 01 00 00 00 00 00 000000
CC: 7:0 92 80 80 12 00 12 121200
DD: 7:1 01 00 00 01 00 00 000000
EE: 7:2 00 00 00 00 00 00 000000
FF: 7:3 00 00 00 00 00 00 000000
So it seems that the pinmux is not correctly set ! I found on the forum that during the boot, I can directly change the pinmux registers so I do the following at boot time:
mw 0x70003144 0x6044
mw 0x70003148 0x6044
mw 0x7000314c 0x6044
mw 0x70003150 0x6044
mw 0x6000d204 0
Now, it works, I receive the correct signals on my logic analyzer ! The problem is that it’s not persistent through reboot… jetson-io doesn’t seem to properly configure the device tree for the pinmux.
Here is the generated device tree:
kernel_tegra210-p3448-0000-p3449-0000-b00-user-custom.zip (41.7 KB)
Could you explain how to modify this device tree so it correctly enables the pinmux ?
Thanks !