[alsa-devel] [PATCH v3] ALSA: Fix mute led GPIO on HP dv-series notebooks.

[Takashi Iwai]

At Fri, 15 Jan 2010 21:01:47 +0530,
Kunal Gangakhedkar wrote:
> 
> On my laptop (HP dv6-1110ax), there are no OEM strings in SMBIOS of type
> "HP_Mute_LED*". Hence, the GPIO for the mute button LED doesn't get set
> properly. I didn't find the strings in my cousin's laptop (HP dv9500t CTO)
> either.
> 
> As per the documentation of find_mute_led_gpio(), these strings occur
> in HP B-series systems - so, before scanning the SMBIOS strings, we need to
> check if we're dealing with a B-series system.
> Need to get confirmation from HP if this logic takes care of all the
> systems. I'm trying to poke a friend there.
> 
> Please let me know if this looks OK or needs change.
> 
> Signed-off-by: Kunal Gangakhedkar <kunal.gangakhedkar at gmail.com>

Thanks, applied now (with a minor change from snd_printd() to
snd_printdd() -- since snd_printd() is enabled in many cases).


Takashi

> ---
>  sound/pci/hda/patch_sigmatel.c |   61 +++++++++++++++++++++++++++++----------
>  1 files changed, 45 insertions(+), 16 deletions(-)
> 
> diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
> index 117919a..7d3e66a 100644
> --- a/sound/pci/hda/patch_sigmatel.c
> +++ b/sound/pci/hda/patch_sigmatel.c
> @@ -4737,6 +4737,26 @@ static void stac92xx_unsol_event(struct hda_codec *codec, unsigned int res)
>  	}
>  }
>  
> +static int hp_blike_system(u32 subsystem_id);
> +
> +static void set_hp_led_gpio(struct hda_codec *codec)
> +{
> +	struct sigmatel_spec *spec = codec->spec;
> +	switch (codec->vendor_id) {
> +	case 0x111d7608:
> +		/* GPIO 0 */
> +		spec->gpio_led = 0x01;
> +		break;
> +	case 0x111d7600:
> +	case 0x111d7601:
> +	case 0x111d7602:
> +	case 0x111d7603:
> +		/* GPIO 3 */
> +		spec->gpio_led = 0x08;
> +		break;
> +	}
> +}
> +
>  /*
>   * This method searches for the mute LED GPIO configuration
>   * provided as OEM string in SMBIOS. The format of that string
> @@ -4748,6 +4768,14 @@ static void stac92xx_unsol_event(struct hda_codec *codec, unsigned int res)
>   *
>   * So, HP B-series like systems may have HP_Mute_LED_0 (current models)
>   * or  HP_Mute_LED_0_3 (future models) OEM SMBIOS strings
> + *
> + *
> + * The dv-series laptops don't seem to have the HP_Mute_LED* strings in
> + * SMBIOS - at least the ones I have seen do not have them - which include
> + * my own system (HP Pavilion dv6-1110ax) and my cousin's
> + * HP Pavilion dv9500t CTO.
> + * Need more information on whether it is true across the entire series.
> + * -- kunal
>   */
>  static int find_mute_led_gpio(struct hda_codec *codec)
>  {
> @@ -4758,28 +4786,27 @@ static int find_mute_led_gpio(struct hda_codec *codec)
>  		while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING,
>  								NULL, dev))) {
>  			if (sscanf(dev->name, "HP_Mute_LED_%d_%d",
> -			      &spec->gpio_led_polarity,
> -			      &spec->gpio_led) == 2) {
> +				  &spec->gpio_led_polarity,
> +				  &spec->gpio_led) == 2) {
>  				spec->gpio_led = 1 << spec->gpio_led;
>  				return 1;
>  			}
>  			if (sscanf(dev->name, "HP_Mute_LED_%d",
> -			      &spec->gpio_led_polarity) == 1) {
> -				switch (codec->vendor_id) {
> -				case 0x111d7608:
> -					/* GPIO 0 */
> -					spec->gpio_led = 0x01;
> -					return 1;
> -				case 0x111d7600:
> -				case 0x111d7601:
> -				case 0x111d7602:
> -				case 0x111d7603:
> -					/* GPIO 3 */
> -					spec->gpio_led = 0x08;
> -					return 1;
> -				}
> +				  &spec->gpio_led_polarity) == 1) {
> +				set_hp_led_gpio(codec);
> +				return 1;
>  			}
>  		}
> +
> +		/*
> +		 * Fallback case - if we don't find the DMI strings,
> +		 * we statically set the GPIO - if not a B-series system.
> +		 */
> +		if (!hp_blike_system(codec->subsystem_id)) {
> +			set_hp_led_gpio(codec);
> +			spec->gpio_led_polarity = 1;
> +			return 1;
> +		}
>  	}
>  	return 0;
>  }
> @@ -5603,6 +5630,8 @@ again:
>  	spec->num_dmuxes = ARRAY_SIZE(stac92hd71bxx_dmux_nids);
>  	spec->num_smuxes = stac92hd71bxx_connected_smuxes(codec, 0x1e);
>  
> +	snd_printd("Found board config: %d\n", spec->board_config);
> +
>  	switch (spec->board_config) {
>  	case STAC_HP_M4:
>  		/* enable internal microphone */
> -- 
> 1.6.6.60.gc2ff1
>