> -----Original Message----- > From: Hans de Goede [mailto:hdegoede@xxxxxxxxxx] > Sent: Friday, October 27, 2017 6:18 PM > To: Bard Liao; Pierre-Louis Bossart > Cc: alsa-devel@xxxxxxxxxxxxxxxx; Oder Chiou; Shuming [范書銘]; Albert Chen > Subject: Re: Cherry Trail + RT5645 devices with a mono speaker ? > > >> > >> On 16-10-17 13:31, Bard Liao wrote: > >>>> -----Original Message----- > >>>> From: Hans de Goede [mailto:hdegoede@xxxxxxxxxx] > >>>> Sent: Sunday, October 15, 2017 2:12 AM > >>>> To: Pierre-Louis Bossart; Bard Liao > >>>> Cc: alsa-devel@xxxxxxxxxxxxxxxx > >>>> 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. > >>> Unfortunately, "SPOL MIX DAC R1 Switch" and "SPOL MIX SPKVOL R Switch" are no longer valid. I will send a patch for that. Please use "Stereo DAC MIXL DAC R1 Switch" to do L/R channel mix. > > Regards, > > Hans > > ------Please consider the environment before printing this e-mail. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
