[PATCH] drm/bridge: sii902x: add audio graph card support

[Daniel Vetter]

On Thu, Jul 11, 2019 at 09:27:30AM +0000, Philippe CORNU wrote:
> Hi Daniel,
> 
> 
> On 7/10/19 5:27 PM, Daniel Vetter wrote:
> > On Fri, Jul 05, 2019 at 12:41:03PM +0000, Philippe CORNU wrote:
> >> Hi Olivier,
> >> and many thanks for your patch.
> >> Good to have the audio graph card support, looks ok.
> >> Reviewed-by: Philippe Cornu <philippe.cornu at st.com>
> > 
> > Since you have drm-misc commit rights I'm assuming you're going to push
> > this too. Correct?
> 
> Regarding this patch in particular, there is still missing an acked-by 
> from a "bridge" maintainer. Also it could be nice to wait for the 
> reviewed-by from Jiry as it knows well this sii driver and sent recently 
> good patches on it (already merged).

The bridge maintainer is looking for new bridge maintainers (atm we have
only one, defacto), so for bridge driver patches I really don't think it's
a good idea to gate on that single bottle-neck. Infrastructure is a bit a
different thing.

> With that, Benjamin or I (or a bridge maintainer) can push this patch + 
> the serie named "drm/bridge: sii902x: fix audio mclk management" as I 
> think it is better to push this serie *before* this patch.

Wahtever you feel like, just wanted to make sure you're not stuck
twiddling thumbs. The entire point of drm-misc is to facility mesh review
and maintainership, because the strict hierarchy just doesn't work for
smaller things. Exactly because you're always blocked on a bottleneck
somewhere.
-Daniel

> 
> Thanks,
> Philippe :-)
> 
> 
> >> Philippe :-)
> >>
> >> On 7/3/19 10:04 AM, Olivier Moysan wrote:
> >>> Implement get_dai_id callback of audio HDMI codec
> >>> to support ASoC audio graph card.
> >>> HDMI audio output has to be connected to sii902x port 3.
> >>> get_dai_id callback maps this port to ASoC DAI index 0.
> >>>
> >>> Signed-off-by: Olivier Moysan <olivier.moysan at st.com>
> >>> ---
> >>>    drivers/gpu/drm/bridge/sii902x.c | 23 +++++++++++++++++++++++
> >>>    1 file changed, 23 insertions(+)
> >>>
> >>> diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
> >>> index dd7aa466b280..daf9ef3cd817 100644
> >>> --- a/drivers/gpu/drm/bridge/sii902x.c
> >>> +++ b/drivers/gpu/drm/bridge/sii902x.c
> >>> @@ -158,6 +158,8 @@
> >>>    
> >>>    #define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS	500
> >>>    
> >>> +#define SII902X_AUDIO_PORT_INDEX		3
> >>> +
> >>>    struct sii902x {
> >>>    	struct i2c_client *i2c;
> >>>    	struct regmap *regmap;
> >>> @@ -690,11 +692,32 @@ static int sii902x_audio_get_eld(struct device *dev, void *data,
> >>>    	return 0;
> >>>    }
> >>>    
> >>> +static int sii902x_audio_get_dai_id(struct snd_soc_component *component,
> >>> +				    struct device_node *endpoint)
> >>> +{
> >>> +	struct of_endpoint of_ep;
> >>> +	int ret;
> >>> +
> >>> +	ret = of_graph_parse_endpoint(endpoint, &of_ep);
> >>> +	if (ret < 0)
> >>> +		return ret;
> >>> +
> >>> +	/*
> >>> +	 * HDMI sound should be located at reg = <3>
> >>> +	 * Return expected DAI index 0.
> >>> +	 */
> >>> +	if (of_ep.port == SII902X_AUDIO_PORT_INDEX)
> >>> +		return 0;
> >>> +
> >>> +	return -EINVAL;
> >>> +}
> >>> +
> >>>    static const struct hdmi_codec_ops sii902x_audio_codec_ops = {
> >>>    	.hw_params = sii902x_audio_hw_params,
> >>>    	.audio_shutdown = sii902x_audio_shutdown,
> >>>    	.digital_mute = sii902x_audio_digital_mute,
> >>>    	.get_eld = sii902x_audio_get_eld,
> >>> +	.get_dai_id = sii902x_audio_get_dai_id,
> >>>    };
> >>>    
> >>>    static int sii902x_audio_codec_init(struct sii902x *sii902x,
> >>>
> > 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch