[alsa-devel] [PATCH] snd-maestro3: Enable docking support for Dell Latitude C810

[Takashi Iwai]

On Sun, 01 Nov 2015 14:32:03 +0100,
Ondrej Zary wrote:
> 
> Enable I2S docking for Dell Latitude C810.
> This allows the audio output on C/Port II to work (and probably also
> the audio inputs on C/Dock II).
> 
> The volume can't be adjusted - none of the mixer controls currently
> supported affects the I2S output (they belong to the STAC9721/23 AC'97
> codec responsible for the laptop internal connectors & speakers).
> 
> Signed-off-by: Ondrej Zary <linux at rainbow-software.org>

Applied, thanks.


Takashi

> ---
>  sound/pci/maestro3.c |   15 +++++++++++----
>  1 file changed, 11 insertions(+), 4 deletions(-)
> 
> diff --git a/sound/pci/maestro3.c b/sound/pci/maestro3.c
> index 72e89ce..965d5c6 100644
> --- a/sound/pci/maestro3.c
> +++ b/sound/pci/maestro3.c
> @@ -1932,12 +1932,19 @@ snd_m3_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
>  }
>  
>  
> -static void snd_m3_remote_codec_config(int io, int isremote)
> +static void snd_m3_remote_codec_config(struct snd_m3 *chip, int isremote)
>  {
> +	int io = chip->iobase;
> +	u16 tmp;
> +
>  	isremote = isremote ? 1 : 0;
>  
> -	outw((inw(io + RING_BUS_CTRL_B) & ~SECOND_CODEC_ID_MASK) | isremote,
> -	     io + RING_BUS_CTRL_B);
> +	tmp = inw(io + RING_BUS_CTRL_B) & ~SECOND_CODEC_ID_MASK;
> +	/* enable dock on Dell Latitude C810 */
> +	if (chip->pci->subsystem_vendor == 0x1028 &&
> +	    chip->pci->subsystem_device == 0x00e5)
> +		tmp |= M3I_DOCK_ENABLE;
> +	outw(tmp | isremote, io + RING_BUS_CTRL_B);
>  	outw((inw(io + SDO_OUT_DEST_CTRL) & ~COMMAND_ADDR_OUT) | isremote,
>  	     io + SDO_OUT_DEST_CTRL);
>  	outw((inw(io + SDO_IN_DEST_CTRL) & ~STATUS_ADDR_IN) | isremote,
> @@ -1989,7 +1996,7 @@ static void snd_m3_ac97_reset(struct snd_m3 *chip)
>  		if (!chip->irda_workaround)
>  			dir |= 0x10; /* assuming pci bus master? */
>  
> -		snd_m3_remote_codec_config(io, 0);
> +		snd_m3_remote_codec_config(chip, 0);
>  
>  		outw(IO_SRAM_ENABLE, io + RING_BUS_CTRL_A);
>  		udelay(20);
> -- 
> Ondrej Zary
> 
>