[alsa-devel] [PATCH v2 1/4] DRM: add help to get ELD speaker allocation

[Daniel Vetter]

On Mon, Dec 19, 2016 at 11:09:55AM +0200, Jani Nikula wrote:
> On Wed, 14 Dec 2016, Arnaud Pouliquen <arnaud.pouliquen at st.com> wrote:
> > Add helper to allow users to retrieve the speaker allocations without
> > knowledge of the ELD structure.
> >
> > Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
> 
> For this one patch,
> 
> Reviewed-by: Jani Nikula <jani.nikula at intel.com>

Takashi, do you want a topic branch pull request for this one here for
merging through the sound tree?
-Daniel

> 
> > ---
> >  include/drm/drm_edid.h | 13 +++++++++++++
> >  1 file changed, 13 insertions(+)
> >
> > diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> > index 919933d..0706cc6 100644
> > --- a/include/drm/drm_edid.h
> > +++ b/include/drm/drm_edid.h
> > @@ -245,6 +245,7 @@ struct detailed_timing {
> >  # define DRM_ELD_AUD_SYNCH_DELAY_MAX	0xfa	/* 500 ms */
> >  
> >  #define DRM_ELD_SPEAKER			7
> > +# define DRM_ELD_SPEAKER_MASK		0x7f
> >  # define DRM_ELD_SPEAKER_RLRC		(1 << 6)
> >  # define DRM_ELD_SPEAKER_FLRC		(1 << 5)
> >  # define DRM_ELD_SPEAKER_RC		(1 << 4)
> > @@ -412,6 +413,18 @@ static inline int drm_eld_size(const uint8_t *eld)
> >  }
> >  
> >  /**
> > + * drm_eld_get_spk_alloc - Get speaker allocation
> > + * @eld: pointer to an ELD memory structure
> > + *
> > + * The returned value is the speakers mask. User has to use %DRM_ELD_SPEAKER
> > + * field definitions to identify speakers.
> > + */
> > +static inline u8 drm_eld_get_spk_alloc(const uint8_t *eld)
> > +{
> > +	return eld[DRM_ELD_SPEAKER] & DRM_ELD_SPEAKER_MASK;
> > +}
> > +
> > +/**
> >   * drm_eld_get_conn_type - Get device type hdmi/dp connected
> >   * @eld: pointer to an ELD memory structure
> >   *
> 
> -- 
> Jani Nikula, Intel Open Source Technology Center
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch