[alsa-devel] [PATCH 1/2] ALSA: hdmi - poll eld at resume time

[Wang, Xingchao]

Hi Takashi,

The two patches fix below issues:
1) controller/codec enter suspend mode, insert monitor, gfx side update eld info, but eld# has no valid eld info in audio driver side.
2) hdmi monitor connected,  eld# info keep valid, controller/codec enter suspend mode, remove hdmi monitor, eld# still exist.

thanks
--xingchao

> -----Original Message-----
> From: Wang Xingchao [mailto:xingchao.wang at linux.intel.com]
> Sent: Monday, June 24, 2013 7:45 PM
> To: tiwai at suse.de
> Cc: alsa-devel at alsa-project.org; Wang, Xingchao; Wang Xingchao
> Subject: [PATCH 1/2] ALSA: hdmi - poll eld at resume time
> 
> Hdmi driver may not receive intrinsic event from gfx side when it's in runtime
> suspend mode. There's no ELD info when exit from runtime suspend. This patch
> avoid missing ELD info.
> 
> Signed-off-by: Wang Xingchao <xingchao.wang at linux.intel.com>
> ---
>  sound/pci/hda/patch_hdmi.c | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index
> 7803ddd..cb8ac66 100644
> --- a/sound/pci/hda/patch_hdmi.c
> +++ b/sound/pci/hda/patch_hdmi.c
> @@ -1868,12 +1868,33 @@ static void generic_hdmi_free(struct hda_codec
> *codec)
>  	kfree(spec);
>  }
> 
> +#ifdef CONFIG_PM
> +static int generic_hdmi_resume(struct hda_codec *codec) {
> +	struct hdmi_spec *spec = codec->spec;
> +	int pin_idx;
> +
> +	generic_hdmi_init(codec);
> +	snd_hda_codec_resume_amp(codec);
> +	snd_hda_codec_resume_cache(codec);
> +
> +	for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
> +		struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
> +		hdmi_present_sense(per_pin, 1);
> +	}
> +	return 0;
> +}
> +#endif
> +
>  static const struct hda_codec_ops generic_hdmi_patch_ops = {
>  	.init			= generic_hdmi_init,
>  	.free			= generic_hdmi_free,
>  	.build_pcms		= generic_hdmi_build_pcms,
>  	.build_controls		= generic_hdmi_build_controls,
>  	.unsol_event		= hdmi_unsol_event,
> +#ifdef CONFIG_PM
> +	.resume 		= generic_hdmi_resume,
> +#endif
>  };
> 
> 
> --
> 1.8.1.2