Re: [PATCH v5 4/7] drm/bridge: dw-hdmi: Add API dw_hdmi_set_sample_iec958() for iec958 format

[Shengjiu Wang <shengjiu.wang@gmail.com>]

On Tue, Sep 2, 2025 at 12:52 AM Luca Ceresoli <luca.ceresoli@bootlin.com> wrote:
>
> Hello Shengjiu,
>
> On Thu, 21 Aug 2025 15:31:28 +0800
> Shengjiu Wang <shengjiu.wang@nxp.com> wrote:
>
> > Add API dw_hdmi_set_sample_iec958() for IEC958 format because audio device
> > driver needs IEC958 information to configure this specific setting.
> >
> > Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
> > Acked-by: Liu Ying <victor.liu@nxp.com>
>
> [...]
>
> > +void dw_hdmi_set_sample_iec958(struct dw_hdmi *hdmi, unsigned int iec958)
> > +{
> > +     mutex_lock(&hdmi->audio_mutex);
> > +     hdmi->sample_iec958 = iec958;
> > +     mutex_unlock(&hdmi->audio_mutex);
> > +}
>
> Apologies for jumping in the discussion as late as in v5, but I noticed
> this patch and I was wondering whether this mutex_lock/unlock() is
> really needed, as you're copying an int.

Thanks for your comments.

Seems it is not necessary to add mutex here. I just follow the code as
other similar functions.  I will send a new version to update it.

Best regards
Shengjiu Wang

Shengjiu Wang
>
> Luca
>
> --
> Luca Ceresoli, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com