On 07/25/2015 12:28 PM, Pali Rohár wrote:
Hello,
sometimes after rebooting Nokia N900 initializing alsa audio fails.
Here output from dmesg log when it happen:
[ 6.925140] tpa6130a2 2-0060: Write failed
[ 6.929534] tpa6130a2 2-0060: Failed to initialize chip
[ 6.935272] tpa6130a2: probe of 2-0060 failed with error -121
[ 7.624237] rx51-audio n900-audio: Failed to add TPA6130A2 controls
[ 7.635101] rx51-audio n900-audio: ASoC: failed to init TLV320AIC34: -19
[ 7.645874] rx51-audio n900-audio: ASoC: failed to instantiate card -19
[ 7.665740] rx51-audio n900-audio: snd_soc_register_card failed (-19)
[ 8.063049] ALSA device list:
[ 8.070343] No soundcards found.
Any idea what to do?
Looks like the chip is not responding. Try to add a small delay after
powerup to give the device to be fully ready, something like the following:
--- a/sound/soc/codecs/tpa6130a2.c
+++ b/sound/soc/codecs/tpa6130a2.c
@@ -152,6 +152,8 @@ static int tpa6130a2_power(u8 power)
if (data->power_gpio >= 0)
gpio_set_value(data->power_gpio, 1);
+ msleep(5);
+
data->power_state = 1;
ret = tpa6130a2_initialize();
if (ret < 0) {
--
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