[alsa-devel] [PATCH] ALSA: hda: invert mute led polarity for HP laptops

[Takashi Iwai]

At Sun, 04 Dec 2011 15:13:29 -0200,
Gustavo Maciel Dias Vieira wrote:
> 
> At least two HP laptop models with the IDT 92HD81B1X5 codec have the
> polarity of the mute led inverted with respect to the current driver
> default. Change the polarity for these machines only.
> 
> Signed-off-by: Gustavo Maciel Dias Vieira <gustavo at sagui.org>

Don't these have really no proper DMI entries?  The recent HP laptops
should have the mute LED GPIO pin and polarity set in SMBIOS.


thanks,

Takashi

> ---
>  sound/pci/hda/patch_sigmatel.c |   12 +++++++++++-
>  1 files changed, 11 insertions(+), 1 deletions(-)
> 
> diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
> index d8d2f9d..c920a27 100644
> --- a/sound/pci/hda/patch_sigmatel.c
> +++ b/sound/pci/hda/patch_sigmatel.c
> @@ -5601,6 +5601,16 @@ static void stac92hd8x_fill_auto_spec(struct hda_codec *codec)
>  	spec->num_dmics = spec->auto_dmic_cnt;
>  }
>  
> +static int stac92hd8x_hp_mute_led_polarity(struct hda_codec *codec)
> +{
> +	switch (codec->subsystem_id) {
> +	case 0x103c1650:
> +		return 1;
> +	}
> +	return 0;
> +}
> +
> +
>  static int patch_stac92hd83xxx(struct hda_codec *codec)
>  {
>  	struct sigmatel_spec *spec;
> @@ -5642,7 +5652,7 @@ again:
>  
>  	codec->patch_ops = stac92xx_patch_ops;
>  
> -	if (find_mute_led_gpio(codec, 0))
> +	if (find_mute_led_gpio(codec, stac92hd8x_hp_mute_led_polarity(codec)))
>  		snd_printd("mute LED gpio %d polarity %d\n",
>  				spec->gpio_led,
>  				spec->gpio_led_polarity);
> -- 
> 1.7.7.3
> 
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