[PATCH v3 2/2] drm/bridge: it6505: add audio support to drm_bridge_funcs

[Hermes Wu via B4 Relay]

From: Hermes Wu <hermes...@ite.com.tw>

For supporting audio form I2S to DP audio data sub stream.
Add hdmi_audio callbacks to drm_bridge_funcs for the HDMI codec
framework.

Signed-off-by: Hermes Wu <hermes...@ite.com.tw>
---
 drivers/gpu/drm/bridge/ite-it6505.c | 46 +++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/drivers/gpu/drm/bridge/ite-it6505.c 
b/drivers/gpu/drm/bridge/ite-it6505.c
index 
4c766854de14093b80949bdb410488f504b24db8..832c4e3ff4ada31367788faed9583da676e36cf8
 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -3342,6 +3342,46 @@ it6505_bridge_hdmi_tmds_char_rate_valid(const struct 
drm_bridge *bridge,
        return MODE_OK;
 }
 
+static int it6505_bridge_hdmi_audio_startup(struct drm_connector *connector,
+                                           struct drm_bridge *bridge)
+{
+       struct it6505 *it6505 = bridge_to_it6505(bridge);
+       struct device *dev = it6505->dev;
+
+       if (!it6505->powered || it6505->enable_drv_hold)
+               return -EIO;
+
+       DRM_DEV_DEBUG_DRIVER(dev, "Audio enable");
+       it6505_enable_audio(it6505);
+
+       return 0;
+}
+
+static int it6505_bridge_hdmi_audio_prepare(struct drm_connector *connector,
+                                           struct drm_bridge *bridge,
+                                           struct hdmi_codec_daifmt *fmt,
+                                           struct hdmi_codec_params *hparms)
+{
+       struct it6505 *it6505 = bridge_to_it6505(bridge);
+       int err;
+
+       err = it6505_audio_setup_hw_params(it6505, hparms);
+       if (err < 0)
+               return err;
+
+       return 
drm_atomic_helper_connector_hdmi_update_audio_infoframe(connector,
+                                                                      
&hparms->cea);
+}
+
+static void it6505_bridge_hdmi_audio_shutdown(struct drm_connector *connector,
+                                             struct drm_bridge *bridge)
+{
+       struct it6505 *it6505 = bridge_to_it6505(bridge);
+
+       if (it6505->powered && !it6505->enable_drv_hold)
+               it6505_disable_audio(it6505);
+}
+
 static const struct drm_bridge_funcs it6505_bridge_funcs = {
        .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
        .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
@@ -3358,6 +3398,9 @@ static const struct drm_bridge_funcs it6505_bridge_funcs 
= {
        .hdmi_clear_infoframe = it6505_bridge_hdmi_clear_infoframe,
        .hdmi_write_infoframe = it6505_bridge_hdmi_write_infoframe,
        .hdmi_tmds_char_rate_valid = it6505_bridge_hdmi_tmds_char_rate_valid,
+       .hdmi_audio_startup = it6505_bridge_hdmi_audio_startup,
+       .hdmi_audio_prepare = it6505_bridge_hdmi_audio_prepare,
+       .hdmi_audio_shutdown = it6505_bridge_hdmi_audio_shutdown,
 };
 
 static __maybe_unused int it6505_bridge_resume(struct device *dev)
@@ -3746,6 +3789,9 @@ static int it6505_i2c_probe(struct i2c_client *client)
                             DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_HDMI;
        it6505->bridge.vendor = "iTE";
        it6505->bridge.product = "IT6505";
+       it6505->bridge.hdmi_audio_dev = dev;
+       it6505->bridge.hdmi_audio_max_i2s_playback_channels = 2;
+       it6505->bridge.hdmi_audio_dai_port = 1;
        drm_bridge_add(&it6505->bridge);
 
        return 0;

-- 
2.34.1