linux-kernel - Re: [PATCH] drm/bridge: anx7625: Support HDMI

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Date:   Wed, 10 Aug 2022 16:58:18 +0800
From:   Hsin-Yi Wang <hsinyi@...omium.org>
To:     Jiaxin Yu <jiaxin.yu@...iatek.com>
Cc:     Xin Ji <xji@...logixsemi.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, bliang@...logixsemi.com,
        qwen@...logixsemi.com, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/bridge: anx7625: Support HDMI_I2S audio format

On Tue, Jul 26, 2022 at 5:16 PM Jiaxin Yu <jiaxin.yu@...iatek.com> wrote:
>
> On Tue, 2022-07-26 at 11:30 +0800, Xin Ji wrote:
> > 1. Support HDMI_I2S audio format.
> > 2. Return 0 if there is no sink connection in .hw_param callback.
> >
> > Signed-off-by: Xin Ji <xji@...logixsemi.com>
> > ---
> >  drivers/gpu/drm/bridge/analogix/anx7625.c | 23 +++++++++++++++++--
> > ----
> >  1 file changed, 17 insertions(+), 6 deletions(-)
> >
> Acked-by: Jiaxin Yu<jiaxin.yu@...iatek.com>
Acked-by: Hsin-Yi Wang <hsinyi@...omium.org>

> > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > index 79fc7a50b497..c74b5df4cade 100644
> > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > @@ -1797,8 +1797,13 @@ static int anx7625_audio_hw_params(struct
> > device *dev, void *data,
> >       int wl, ch, rate;
> >       int ret = 0;
> >
> > -     if (fmt->fmt != HDMI_DSP_A) {
> > -             DRM_DEV_ERROR(dev, "only supports DSP_A\n");
> > +     if (anx7625_sink_detect(ctx) == connector_status_disconnected)
> > {
> > +             DRM_DEV_DEBUG_DRIVER(dev, "DP not connected\n");
> > +             return 0;
> > +     }
> > +
> > +     if (fmt->fmt != HDMI_DSP_A && fmt->fmt != HDMI_I2S) {
> > +             DRM_DEV_ERROR(dev, "only supports DSP_A & I2S\n");
> >               return -EINVAL;
> >       }
> >
> > @@ -1806,10 +1811,16 @@ static int anx7625_audio_hw_params(struct
> > device *dev, void *data,
> >                            params->sample_rate, params->sample_width,
> >                            params->cea.channels);
> >
> > -     ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > -                                 AUDIO_CHANNEL_STATUS_6,
> > -                                 ~I2S_SLAVE_MODE,
> > -                                 TDM_SLAVE_MODE);
> > +     if (fmt->fmt == HDMI_DSP_A)
> > +             ret = anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > +                                        AUDIO_CHANNEL_STATUS_6,
> > +                                        ~I2S_SLAVE_MODE,
> > +                                        TDM_SLAVE_MODE);
> > +     else
> > +             ret = anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> > +                                        AUDIO_CHANNEL_STATUS_6,
> > +                                        ~TDM_SLAVE_MODE,
> > +                                        I2S_SLAVE_MODE);
> >
> >       /* Word length */
> >       switch (params->sample_width) {
>