linux-kernel - Re: [PATCH] ALSA: hda: cs35l41: Support ASUS 2023 laptops with missing DSD

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Date:   Wed, 23 Aug 2023 13:18:01 +1200
From:   Luke Jones <luke@...nes.dev>
To:     tiwai@...e.com
Cc:     james.schulman@...rus.com, david.rhodes@...rus.com,
        rf@...nsource.cirrus.com, linux-kernel@...r.kernel.org,
        sbinding@...nsource.cirrus.com, Jonathan LoBue <jlobue10@...il.com>
Subject: Re: [PATCH] ALSA: hda: cs35l41: Support ASUS 2023 laptops with
 missing DSD


On Wed, Aug 23 2023 at 13:10:08 +12:00:00, Luke D. Jones 
<luke@...nes.dev> wrote:
> Support adding the missing DSD properties required  for ASUS ROG 2023
> laptops and other ASUS laptops to properly utilise the cs35l41.
> 
> This support includes both I2C and SPI connected amps.
> 
> The SPI connected amps may be required to use an external DSD patch
> to fix or add the "cs-gpios" property.
> 
> Co-developed-by: Jonathan LoBue <jlobue10@...il.com>
> Signed-off-by: Jonathan LoBue <jlobue10@...il.com>
> Co-developed-by: Luke D. Jones <luke@...nes.dev>
> Signed-off-by: Luke D. Jones <luke@...nes.dev>
> ---
>  sound/pci/hda/cs35l41_hda_property.c | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/sound/pci/hda/cs35l41_hda_property.c 
> b/sound/pci/hda/cs35l41_hda_property.c
> index 673f23257a09..69879ab57918 100644
> --- a/sound/pci/hda/cs35l41_hda_property.c
> +++ b/sound/pci/hda/cs35l41_hda_property.c
> @@ -43,6 +43,31 @@ static int lenovo_legion_no_acpi(struct 
> cs35l41_hda *cs35l41, struct device *phy
>  	return 0;
>  }
> 
> +/*
> + * The CSC3551 is used in almost the entire ASUS ROG laptop range in 
> 2023, this is likely to
> + * also include many non ROG labelled laptops. It is also used with 
> either I2C connection or
> + * SPI connection. The SPI connected versions may be missing a chip 
> select GPIO and require
> + * an DSD table patch.
> + */
> +static int asus_rog_2023_no_acpi(struct cs35l41_hda *cs35l41, struct 
> device *physdev, int id,
> +				const char *hid)
> +{
> +	struct cs35l41_hw_cfg *hw_cfg = &cs35l41->hw_cfg;
> +
> +	/* check SPI or I2C address to assign the index */
> +	cs35l41->index = (id == 0 || id == 0x40) ? 0 : 1;
> +	cs35l41->channel_index = 0;
> +	cs35l41->reset_gpio = gpiod_get_index(physdev, NULL, 0, 
> GPIOD_OUT_HIGH);
> +	cs35l41->speaker_id = cs35l41_get_speaker_id(physdev, 0, 0, 2);
> +	hw_cfg->spk_pos = cs35l41->index;
> +	hw_cfg->gpio2.func = CS35L41_INTERRUPT;
> +	hw_cfg->gpio2.valid = true;
> +	hw_cfg->bst_type = CS35L41_EXT_BOOST_NO_VSPK_SWITCH;
> +	hw_cfg->valid = true;
> +
> +	return 0;
> +}
> +
>  struct cs35l41_prop_model {
>  	const char *hid;
>  	const char *ssid;
> @@ -53,6 +78,7 @@ struct cs35l41_prop_model {
>  const struct cs35l41_prop_model cs35l41_prop_model_table[] = {
>  	{ "CLSA0100", NULL, lenovo_legion_no_acpi },
>  	{ "CLSA0101", NULL, lenovo_legion_no_acpi },
> +	{ "CSC3551", NULL, asus_rog_2023_no_acpi },
>  	{}
>  };
> 
> --
> 2.41.0

Although this does work for SPI connected amps, it still requires the 
chipselect DSD patch:

DefinitionBlock ("", "SSDT", 1, "CUSTOM", "CSC3551", 0x00000001)
{
    External (_SB_.PC00.SPI3, DeviceObj)
    External (_SB_.PC00.SPI3.SPK1, DeviceObj)

    Scope (_SB.PC00.SPI3)
    {
        Name (_DSD, Package ()
        {
            ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
            Package ()
            {
                Package () { "cs-gpios", Package () { Zero, SPK1, Zero, 
Zero, Zero } }
            }
        })
    }
}

I am unsure what to do about this and any advice would be appreciated.

Cheers,
Luke.