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Wed, 12 Feb 2020 00:19:17 -0800 Received: from MTKMBS02N1.mediatek.inc (172.21.101.77) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 12 Feb 2020 00:19:25 -0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs02n1.mediatek.inc (172.21.101.77) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 12 Feb 2020 16:17:37 +0800 Received: from [172.21.77.4] (172.21.77.4) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 12 Feb 2020 16:19:42 +0800 Message-ID: <1581495554.22603.2.camel@mtksdaap41> Subject: Re: [PATCH v2 2/3] drm/mediatek: support HDMI jack status reporting From: CK Hu To: Tzung-Bi Shih Date: Wed, 12 Feb 2020 16:19:14 +0800 In-Reply-To: <20200206102509.2.I230fd59de28e73934a91cb01424e25b9e84727f4@changeid> References: <20200206031752.193298-1-tzungbi@google.com> <20200206102509.2.I230fd59de28e73934a91cb01424e25b9e84727f4@changeid> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200212_001929_248736_5688E53B X-CRM114-Status: GOOD ( 16.17 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alsa-devel@alsa-project.org, cychiang@google.com, airlied@linux.ie, dri-devel@lists.freedesktop.org, broonie@kernel.org, linux-mediatek@lists.infradead.org, daniel@ffwll.ch, matthias.bgg@gmail.com, p.zabel@pengutronix.de, dgreid@google.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Hi, Tzung-Bi: On Thu, 2020-02-06 at 11:17 +0800, Tzung-Bi Shih wrote: > 1. > Provides a callback (i.e. mtk_hdmi_audio_hook_plugged_cb) to hdmi-codec. > When ASoC machine driver calls hdmi_codec_set_jack_detect(), the > callback will be invoked to save plugged_cb and codec_dev parameters. > > +---------+ set_jack_ +------------+ plugged_cb +----------+ > | machine | ----------> | hdmi-codec | ----------> | mtk-hdmi | > +---------+ detect() +------------+ codec_dev +----------+ > > 2. > When there is any jack status changes, mtk-hdmi will call the > plugged_cb() to notify hdmi-codec. And then hdmi-codec will call > snd_soc_jack_report(). > > +----------+ plugged_cb +------------+ > | mtk-hdmi | ----------> | hdmi-codec | -> snd_soc_jack_report() > +----------+ codec_dev +------------+ > connector_status > > Signed-off-by: Tzung-Bi Shih > --- > drivers/gpu/drm/mediatek/mtk_hdmi.c | 34 ++++++++++++++++++++++++++--- > 1 file changed, 31 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c > index 23c2b0e8693d..fccdd975947d 100644 > --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c > +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c > @@ -169,6 +169,8 @@ struct mtk_hdmi { > bool audio_enable; > bool powered; > bool enabled; > + hdmi_codec_plugged_cb plugged_cb; > + struct device *codec_dev; > }; > > static inline struct mtk_hdmi *hdmi_ctx_from_bridge(struct drm_bridge *b) > @@ -1194,13 +1196,23 @@ static void mtk_hdmi_clk_disable_audio(struct mtk_hdmi *hdmi) > clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_AUD_SPDIF]); > } > > +static enum drm_connector_status > +mtk_hdmi_update_plugged_status(struct mtk_hdmi *hdmi) > +{ > + bool connected = mtk_cec_hpd_high(hdmi->cec_dev); > + > + if (hdmi->plugged_cb && hdmi->codec_dev) > + hdmi->plugged_cb(hdmi->codec_dev, connected); > + > + return connected ? > + connector_status_connected : connector_status_disconnected; > +} > + > static enum drm_connector_status hdmi_conn_detect(struct drm_connector *conn, > bool force) > { > struct mtk_hdmi *hdmi = hdmi_ctx_from_conn(conn); > - > - return mtk_cec_hpd_high(hdmi->cec_dev) ? > - connector_status_connected : connector_status_disconnected; > + return mtk_hdmi_update_plugged_status(hdmi); > } > > static void hdmi_conn_destroy(struct drm_connector *conn) > @@ -1648,20 +1660,36 @@ static int mtk_hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, > return 0; > } > > +static int mtk_hdmi_audio_hook_plugged_cb(struct device *dev, void *data, > + hdmi_codec_plugged_cb fn, > + struct device *codec_dev) > +{ > + struct mtk_hdmi *hdmi = data; > + > + hdmi->plugged_cb = fn; > + hdmi->codec_dev = codec_dev; > + mtk_hdmi_update_plugged_status(hdmi); I think hdmi_conn_detect() and mtk_hdmi_audio_hook_plugged_cb() would be called in different thread. So it's necessary to use a mutex to protect this. Regards, CK > + > + return 0; > +} > + > static const struct hdmi_codec_ops mtk_hdmi_audio_codec_ops = { > .hw_params = mtk_hdmi_audio_hw_params, > .audio_startup = mtk_hdmi_audio_startup, > .audio_shutdown = mtk_hdmi_audio_shutdown, > .digital_mute = mtk_hdmi_audio_digital_mute, > .get_eld = mtk_hdmi_audio_get_eld, > + .hook_plugged_cb = mtk_hdmi_audio_hook_plugged_cb, > }; > > static int mtk_hdmi_register_audio_driver(struct device *dev) > { > + struct mtk_hdmi *hdmi = dev_get_drvdata(dev); > struct hdmi_codec_pdata codec_data = { > .ops = &mtk_hdmi_audio_codec_ops, > .max_i2s_channels = 2, > .i2s = 1, > + .data = hdmi, > }; > struct platform_device *pdev; > _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek