[Letux-kernel] jz4730 sound

[H. Nikolaus Schaller]

Hi Paul,
as mentioned earlier, sound and codec setup seems to work now
but i2s hangs.

It seems as if some gpio config is still wrong and the i2c clock
is not fed from the codec into the i2s engine.

Now, I have written a small tool to really analyse the gpio settings
of a running machine:

#!/bin/bash

PATH=.:$PATH:/usr/bin/$(echo $MACHTYPE | sed s/unknown-//g)

BASE=0x10010000		# GPIO base

function readw {
	# prints as 0x with upper case
	devmem2 $[$1+$2] w | fgrep 'Value at address' | cut -d ' ' -f 6
}

function strip0x {
	echo $[$1]
}

printf "GPIO num: data DIR PULL FUNC IT IE IM IRQ\n"
printf "0x%08x %03s: %s\n" 0 "---" "d D P F T E M I"
for gpio in 0 1 2 3
do
	GPIO=$[BASE+0x30*gpio]	# get base address of gpio block
	D=$(readw $GPIO 0)
	DIR=$(readw $GPIO 4)
	PE=$(readw $GPIO 0xc)
	FSL=$(readw $GPIO 0x10)
	FSH=$(readw $GPIO 0x14)
	ITL=$(readw $GPIO 0x18)
	ITH=$(readw $GPIO 0x1c)
	IE=$(readw $GPIO 0x20)
	IM=$(readw $GPIO 0x24)
	IIRQ=$(readw $GPIO 0x28)
	FS=$[FSH*0x100000000+FSL]	# bash seems to be able to do 64 bit arithmetic
	IT=$[ITH*0x100000000+ITL]
#echo $D $DIR $PE $FSL $FSH $FS
	for pin in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
	do
		P=$[32*gpio+pin]
		d=$[D%2]
		dir=$([ $[DIR%2] == 1 ] && echo O || echo I)
		pull=$([ $[PE%2] == 1 ] && echo P || echo -)
		func=$[FS%4]
		it=$[IT%4]
		ie=$([ $[IE%2] == 1 ] && echo E || echo -)
		im=$([ $[IM%2] == 1 ] && echo M || echo -)
		irq=$([ $[IRQ%2] == 1 ] && echo I || echo -)
		printf "0x%08x %03d: %s\n" $GPIO $P "$d $dir $pull $func $it $ie $im $irq"
		DIR=$[DIR/2]
		PE=$[PE/2]
		FS=$[FS/4]
		IT=$[IT/4]
		IE=$[IE/2]
		IM=$[IM/2]
		IRQ=$[IRQ/2]
	done
done


Results on the 2.6 kernel (where sound is also not working)
and 5.12-rc4 is attached. There are just 13 lines wirh differences.
Some may be intentional and some may be bugs. And some may be transient
because I was reading them off a running system which may be in different
states.

Hopefully someone can make sense out of it.

BR,
Nikolaus

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: jzgpio-2.6.txt
URL: <http://lists.goldelico.com/pipermail/letux-kernel/attachments/20210326/851da580/attachment.txt>
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: jzgpio-5.12.txt
URL: <http://lists.goldelico.com/pipermail/letux-kernel/attachments/20210326/851da580/attachment-0001.txt>