[alsa-devel] [PATCH] ALSA: hda/hdmi - add a parameter to let users decide if checking the eld_valid

[Hui Wang]

On 2019/11/12 下午8:21, Hui Wang wrote:
>
> On 2019/11/12 上午12:04, Takashi Iwai wrote:
>> On Mon, 11 Nov 2019 16:33:45 +0100,
>> Takashi Iwai wrote:
>>> On Mon, 11 Nov 2019 15:45:02 +0100,
>>> Hui Wang wrote:
>
[snip]
>> On the second thought, I wonder whether eld_valid would be corrected
>> later by the graphics side at all.  If yes, it's a timing issue, and
>> it can be corrected with the repolling.
>>
>> A totally untested patch is below.
>
> I will build a testing kernel with this patch and let the bug reporter 
> test it.
>
> Thanks,
>
> Hui.

Hello Takashi,

Tested the patch,  it didn't work. The driver always failed to read the 
speaker allocation from snd_hdmi_get_eld_ati().

This is the dmesg after adding the patch:

https://launchpadlibrarian.net/451420819/dmesg (both presence and 
eld_valid bits are set, but can't get the speaker_alloc)

Regards,

Hui.


>
>
>>
>> thanks,
>>
>> Takashi
>>
>> --- a/sound/pci/hda/patch_hdmi.c
>> +++ b/sound/pci/hda/patch_hdmi.c
>> @@ -1549,19 +1549,25 @@ static bool 
>> hdmi_present_sense_via_verbs(struct hdmi_spec_per_pin *per_pin,
>>               do_repoll = true;
>>       }
>>   -    if (do_repoll)
>> +    do_repoll |= repoll && eld->eld_valid != eld->monitor_present;
>> +    if (do_repoll) {
>>           schedule_delayed_work(&per_pin->work, msecs_to_jiffies(300));
>> -    else
>> +        ret = false;
>> +    } else {
>>           update_eld(codec, per_pin, eld);
>> -
>> -    ret = !repoll || !eld->monitor_present || eld->eld_valid;
>> +        per_pin->repoll_count = 0;
>> +        ret = true;
>> +    }
>>         jack = snd_hda_jack_tbl_get(codec, pin_nid);
>>       if (jack) {
>>           jack->block_report = !ret;
>> -        jack->pin_sense = (eld->monitor_present && eld->eld_valid) ?
>> -            AC_PINSENSE_PRESENCE : 0;
>> +        if (ret) {
>> +            jack->pin_sense = (eld->monitor_present && 
>> eld->eld_valid) ?
>> +                AC_PINSENSE_PRESENCE : 0;
>> +        }
>>       }
>> +
>>       mutex_unlock(&per_pin->lock);
>>       return ret;
>>   }
>>