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drm/mediatek: support HDMI jack status reporting

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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 <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200206102509.2.I230fd59de28e73934a91cb01424e25b9e84727f4@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Tzung-Bi Shih 2020-02-06 11:17:51 +08:00 committed by Mark Brown
parent f9eb06cd0c
commit 5d3c644773
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 31 additions and 3 deletions
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34
drivers/gpu/drm/mediatek/mtk_hdmi.c
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@ -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)
@ -1651,20 +1663,36 @@ 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);
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;