[alsa-devel] [PATCH 2/2] ASoC: Intel: bytcr_rt5640: Add quirks for ASUS MeMO Pad 7 (ME176C)

[Hans de Goede]

Hi,

On 24-12-18 10:53, Stephan Gerhold wrote:
> On Mon, Dec 24, 2018 at 10:01:53AM +0100, Hans de Goede wrote:
>> H,
>>
>> On 22-12-18 15:59, Stephan Gerhold wrote:
>>> On Sat, Dec 22, 2018 at 03:47:12PM +0100, Stephan Gerhold wrote:
>>>> Add quirks to select the correct input map, jack-detect options
>>>> and channel map to make sound work on the ASUS MeMO Pad 7 (ME176C).
>>>
>>> Everything seems to work fine with the quirks below, although I have to
>>> say that the internal microphone quality is really bad. There are
>>> always high-pitched sounds in the background. Not sure if the hardware
>>> is just really bad or if there is any way to improve it.
>>> (I never use it so I have not investigated much further..)
>>
>> One possible way of improving it which is worthwhile testing
>> is adding the BYT_RT5640_DIFF_MIC quirk.
>>
>> Note almost all quirk table entries not using a DMIC mapping have this
>> set (it is also set in INPUT_DEFAULTS) because it does not really hurt
>> to enable it, while likely only a few models really have a diff mic.
>>
> 
> I thought that the DIFF_MIC quirk might help, so I tested it shortly
> before sending this patch: I was not able to hear any difference in the
> recorded sample, which is why I didn't add it to the quirks.
> 
> Would you prefer to have it enabled even if it (seemingly) makes no
> difference?

No there is no need for that, I just wanted to make sure that it was not
necessary.

Regards,

Hans



> 
>>>> Note: Although sound works out of the box, jack detection currently
>>>> requires overriding the ACPI DSDT table. This is necessary because
>>>> the rt5640 ACPI device (10EC5640) has the wrong GPIO listed as
>>>> interrupt (one of the Bluetooth GPIOs).
>>>> The correct GPIO is GPO2 0x0004 (listed as the first GPIO in the
>>>> Intel(R) Audio Machine Driver - AMCR0F28 device).
>>>
>>> At some point it might be possible to add a workaround for this using
>>> that AMCR0F28 device which has the correct GPIO. However, at the moment
>>> I still need the DSDT override for Bluetooth to work (with no simple
>>> workaround), so it's probably easiest if we just document it here for
>>> now. Eventually I will investigate this later..
>>
>> +1 for just documenting, as long as this device needs a DSDT override
>> anyways I don't think it is a good idea to add code to the bytcr_rt5640.c
>> machine driver just to avoid that. If the machine driver is the only
>> one needing the DSDT override and some code can avoid it then the
>> balance changes, but for now I believe that just documenting it is
>> best.
> 
> Agreed. :)
> 
>>
>> Regards,
>>
>> Hans
>>
>>
>>
>>
>>
>>>
>>>>
>>>> Signed-off-by: Stephan Gerhold <stephan at gerhold.net>
>>>> ---
>>>>    sound/soc/intel/boards/bytcr_rt5640.c | 12 ++++++++++++
>>>>    1 file changed, 12 insertions(+)
>>>>
>>>> diff --git a/sound/soc/intel/boards/bytcr_rt5640.c b/sound/soc/intel/boards/bytcr_rt5640.c
>>>> index a22366ce33c4..ca8b4d5ff70f 100644
>>>> --- a/sound/soc/intel/boards/bytcr_rt5640.c
>>>> +++ b/sound/soc/intel/boards/bytcr_rt5640.c
>>>> @@ -428,6 +428,18 @@ static const struct dmi_system_id byt_rt5640_quirk_table[] = {
>>>>    					BYT_RT5640_SSP0_AIF1 |
>>>>    					BYT_RT5640_MCLK_EN),
>>>>    	},
>>>> +	{
>>>> +		.matches = {
>>>> +			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
>>>> +			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "ME176C"),
>>>> +		},
>>>> +		.driver_data = (void *)(BYT_RT5640_IN1_MAP |
>>>> +					BYT_RT5640_JD_SRC_JD2_IN4N |
>>>> +					BYT_RT5640_OVCD_TH_2000UA |
>>>> +					BYT_RT5640_OVCD_SF_0P75 |
>>>> +					BYT_RT5640_SSP0_AIF1 |
>>>> +					BYT_RT5640_MCLK_EN),
>>>> +	},
>>>>    	{
>>>>    		.matches = {
>>>>    			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
>>>> -- 
>>>> 2.20.1
>>>>