Re: [PATCH 2/2] ALSA: hda/tas2563: Add tas2563 HDA driver

Gergo Koteles
2023-12-05T01:31:48Z

Hi Pierre-Louis,

On Mon, 2023-12-04 at 18:22 -0600, Pierre-Louis Bossart wrote:
>
>
> >
> > - tas2781_generic_fixup(cdc, action, "i2c", "TIAS2781");
> > + tas2xxx_generic_fixup(cdc, action, "i2c", "TIAS2781");
> > +}
>
> this sort of rename should be part of a separate patch IMHO, it'd be
> easier to review.
>
Okey.

> > +
> > +static void tas2563_fixup_i2c(struct hda_codec *cdc,
> > + const struct hda_fixup *fix, int action)
> > +{
> > + tas2xxx_generic_fixup(cdc, action, "i2c", "INT8866");
>
> Any specific reason to use an Intel ACPI identifier? Why not use
> "TIAS2563" ?
>
INT8866 is in the ACPI.
I don't know why Lenovo uses this name.
I think it's more internal than intel.

Scope (_SB.I2CD)
{
Device (TAS)
{
Name (_HID, "INT8866") // _HID: Hardware ID
Name (_UID, Zero) // _UID: Unique ID
Method (_CRS, 0, NotSerialized) // _CRS: Current Resource
Settings
{
Name (RBUF, ResourceTemplate ()
{
I2cSerialBusV2 (0x004C, ControllerInitiated,
0x00061A80,
AddressingMode7Bit, "\\_SB.I2CD",
0x00, ResourceConsumer, , Exclusive,
)
I2cSerialBusV2 (0x004D, ControllerInitiated,
0x00061A80,
AddressingMode7Bit, "\\_SB.I2CD",
0x00, ResourceConsumer, , Exclusive,
)
GpioInt (Edge, ActiveLow, SharedAndWake, PullNone,
0x0000,
"\\_SB.GPIO", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0020
}
})
Return (RBUF) /* \_SB_.I2CD.TAS_._CRS.RBUF */
}

Method (_STA, 0, NotSerialized) // _STA: Status
{
Return (0x0F)
}
}
}

> > +#define TAS2563_REG_INIT_N 12
>
> newline
>
> > +static const struct reg_default tas2563_reg_init[TAS2563_MAX_CHANNELS]
> > + [TAS2563_REG_INIT_N] = {
> > + {
> > + { TAS2562_TDM_CFG2, 0x5a },
> > + { TAS2562_TDM_CFG4, 0xf3 },
> > + { TAS2562_TDM_CFG5, 0x42 },
> > + { TAS2562_TDM_CFG6, 0x40 },
> > + { TAS2562_BOOST_CFG1, 0xd4 },
> > + { TAS2562_BOOST_CFG3, 0xa4 },
> > + { TAS2562_REG(0x00, 0x36), 0x0b },
> > + { TAS2562_REG(0x00, 0x38), 0x21 },
> > + { TAS2562_REG(0x00, 0x3c), 0x58 },
> > + { TAS2562_BOOST_CFG4, 0xb6 },
> > + { TAS2562_ASI_CONFIG3, 0x04},
> > + { TAS2562_REG(0x00, 0x47), 0xb1 },
>
> > +/* Update the calibrate data, including speaker impedance, f0, etc, into algo.
>
> update the calibration data,
>
> > + * Calibrate data is done by manufacturer in the factory. These data are used
>
> The manufacturer calibrates the data in the factory.
>
> > + * by Algo for calucating the speaker temperature, speaker membrance excursion
>
> calculating
>
> membrane
>
>
> > +static int tas2563_hda_i2c_probe(struct i2c_client *client)
> > +{
> > + struct tas2563_data *tas2563;
> > + int ret;
> > +
> > + tas2563 = devm_kzalloc(&client->dev, sizeof(struct tas2563_data),
> > + GFP_KERNEL);
> > + if (!tas2563)
> > + return -ENOMEM;
> > + tas2563->dev = &client->dev;
> > + tas2563->client = client;
> > +
> > + dev_set_drvdata(tas2563->dev, tas2563);
> > +
> > + ret = tas2563_read_acpi(tas2563);
> > + if (ret)
> > + return dev_err_probe(tas2563->dev, ret,
> > + "Platform not supported\n");
> > +
> > + for (int i = 0; i < tas2563->ndev; ++i) {
> > + struct tas2563_dev *tasdev = &tas2563->tasdevs[i];
> > +
> > + ret = tas2563_tasdev_read_efi(tas2563, tasdev);
> > + if (ret)
> > + return dev_err_probe(tas2563->dev, ret,
> > + "Calibration data cannot be read from EFI\n");
> > +
> > + ret = tas2563_tasdev_init_client(tas2563, tasdev);
> > + if (ret)
> > + return dev_err_probe(tas2563->dev, ret,
> > + "Failed to init i2c client\n");
> > +
> > + ret = tas2563_tasdev_init_regmap(tas2563, tasdev);
> > + if (ret)
> > + return dev_err_probe(tas2563->dev, ret,
> > + "Failed to allocate register map\n");
> > + }
> > +
> > + ret = component_add(tas2563->dev, &tas2563_hda_comp_ops);
> > + if (ret) {
> > + return dev_err_probe(tas2563->dev, ret,
> > + "Register component failed\n");
> > + }
>
> I wonder how many of those tests actually depend on deferred probe, and
> if this isn't a case of copy-paste "just in case"?
>
> > +
> > + pm_runtime_set_autosuspend_delay(tas2563->dev, 3000);
> > + pm_runtime_use_autosuspend(tas2563->dev);
> > + pm_runtime_mark_last_busy(tas2563->dev);
> > + pm_runtime_set_active(tas2563->dev);
> > + pm_runtime_get_noresume(tas2563->dev);
> > + pm_runtime_enable(tas2563->dev);
> > +
> > + pm_runtime_put_autosuspend(tas2563->dev);
>
> the sequence get_noresume/enable/put_autosuspend makes no sense to me.
> doing a get_noresume *before* enable should do exactly nothing, and
> releasing the resource would already be handled with autosuspend based
> on the last_busy mark.
>
I copied this from the tas2781-hda driver, I'll dig into this more.

> > +
> > + return 0;
> > +}
> > +
> > +static void tas2563_hda_i2c_remove(struct i2c_client *client)
> > +{
> > + struct tas2563_data *tas2563 = dev_get_drvdata(&client->dev);
> > +
> > + pm_runtime_get_sync(tas2563->dev);
> > + pm_runtime_disable(tas2563->dev);
> > +
> > + component_del(tas2563->dev, &tas2563_hda_comp_ops);
> > +
> > + pm_runtime_put_noidle(tas2563->dev);
>
> that pm_runtime sequence also makes no sense to me, if you disable
> pm_runtime the last command is useless/no-op.
>
> > +}
> > +
> > +static int tas2563_system_suspend(struct device *dev)
> > +{
> > + struct tas2563_data *tas2563 = dev_get_drvdata(dev);
> > + int ret;
> > +
> > + dev_dbg(tas2563->dev, "System Suspend\n");
> > +
> > + ret = pm_runtime_force_suspend(dev);
> > + if (ret)
> > + return ret;
> > +
> > + return 0;
> > +}
> > +
> > +static int tas2563_system_resume(struct device *dev)
> > +{
> > + int ret;
> > + struct tas2563_data *tas2563 = dev_get_drvdata(dev);
> > +
> > + dev_dbg(tas2563->dev, "System Resume\n");
> > +
> > + ret = pm_runtime_force_resume(dev);
> > + if (ret)
> > + return ret;
> > +
> > + for (int i = 0; i < tas2563->ndev; ++i)
> > + tas2563_tasdev_setup(tas2563, &tas2563->tasdevs[i]);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct dev_pm_ops tas2563_hda_pm_ops = {
> > + SYSTEM_SLEEP_PM_OPS(tas2563_system_suspend, tas2563_system_resume)
>
> where's the pm_runtime stuff?
>

The amp stores its state in software shutdown mode.
The tas2563_hda_playback_hook wakes/shutdowns the amp, not the
pm_runtime.

> > +};
>

Regards,

Gergo