Hi,
On 16-10-17 13:31, Bard Liao wrote:
-----Original Message----- From: Hans de Goede [mailto:hdegoede@redhat.com] Sent: Sunday, October 15, 2017 2:12 AM To: Pierre-Louis Bossart; Bard Liao Cc: alsa-devel@alsa-project.org Subject: Cherry Trail + RT5645 devices with a mono speaker ?
Hi Pierre-Louis, Bard,
I've been looking into getting some Cherry Trail + RT5645 devices with a mono speaker I have to work properly.
Specifically the goal is to mix the right channel into the left output, so that sounds which are only played over the right channel do not get lost.
I'm using this UCM file: https://github.com/plbossart/UCM/blob/master/byt-rt5640/HiFi
Looking at the rtl5640 UCM file, getting the mono speaker to work (in a first simple attempt) should be as simple as replacing:
cset "name='SPOR MIX SPKVOL R Switch' on"With
cset "name='SPOL MIX SPKVOL R Switch' on"But this does not work, the speaker test sound for the right speaker is still silent (works with headphones).
I've also looked into directly poking the RT5645_SPO_MIXER i2c register for testing, but when checking its value with the original unmodified UCM file:
[root@localhost ~]# i2cget -y -f 1 0x1a 0x48 w 0x06c8
That is: 0xc806 as the output of i2cget "w" mode needs byteswapping. Note that both the RT5645_M_SV_L_SPM_L and RT5645_M_SV_R_SPM_L bits are already cleared, which is weird as this is before I've modified anything. Also the RT5645_M_SV_R_SPM_R bit is cleared, but that is expected.
Even if I manually set reg 0x48 to 0x07c8 which AFAIK should enable output of both left and right channels on the left speaker I still only get sounds played on the left channel.
Any insights / help with this would be very much welcome.
Could you dump all registers for us?
Here you go:
0,8 1,9 2,a 3,b 4,c 5,d 6,e 7,f 00: 0000 0808 c8c8 c8c8 0ac8 0000 0000 0000 08: 0000 0000 0200 2738 00e0 0000 0000 0000 10: 0000 0000 0000 0000 3333 0000 004b 0000 18: 8b01 afaf afaf 1100 3f3f 7f7f 00f0 0000 20: 00a0 0000 0000 0000 0000 0000 0000 2038 28: 3030 8080 1616 4444 a0aa 0000 0000 0210 30: 0000 0050 0000 0000 0000 0000 0000 0000 38: 0000 0000 0000 0000 7d00 0000 7d00 0000 40: 1c00 0000 1c00 0000 0000 0050 3800 3800 48: 06c8 0000 0400 0000 1f03 0000 0000 ff01 50: 0000 0000 ff01 00f0 0000 0000 1101 6400 58: 0eef f0f0 0eef f0f0 0eef f0f0 00f0 0000 60: 0000 019b 0008 1ae8 0402 0230 00c0 0000 68: 0000 0000 0000 0000 aa0a 0000 0000 0000 70: 8380 0080 0080 7017 003e 0924 0a00 0058 78: 0000 2301 0080 0000 0000 0000 0000 0000 80: 0040 030f 0030 000c 1111 0000 0800 0000 88: 0000 0000 2001 0000 0300 0000 0000 4011 90: 3606 060c 0000 0801 0202 0000 0000 0000 98: 0000 0000 8421 0a01 ea0a 0c00 0004 0000 a0: e8a0 5900 0100 0000 0000 0000 0000 0000 a8: 0000 0000 0000 0000 0000 0000 0060 0000 b0: 0060 0000 0000 1f00 0c02 001f 0000 0040 b8: 0000 0000 0000 0000 0000 8002 0000 8011 c0: 0080 0000 0000 0020 0000 0000 0000 0000 c8: 0000 0000 0000 0000 0000 0000 0000 1418 d0: 9006 171c 0000 20b3 0000 0000 0004 0000 d8: 0000 0908 0000 0300 4900 1b00 0000 0000 e0: 0000 0000 0000 0000 0000 0000 0080 0007 e8: 0080 0007 200f 0000 00b3 0000 0000 0000 f0: 1f00 0c02 001f 0000 0040 0000 0000 0000 f8: 0000 0000 6120 4040 001a 0400 ec10 0863
Note that i2cdump swaps the low and high bytes in all the 16 bit words.
Regards,
Hans