drm/bridge: allow limiting I2S formats

By default HDMI codec registers all formats supported on the I2S bus.
Allow bridges (and connectors) to limit the list of the PCM formats
supported by the HDMI codec.

Reviewed-by: Maxime Ripard <[e-mail]>
Signed-off-by: Dmitry Baryshkov <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Baryshkov <[e-mail]>

drivers/gpu/drm/display/drm_bridge_connector.c

···
 		ret = drm_connector_hdmi_audio_init(connector, dev,
 						    &drm_bridge_connector_hdmi_audio_funcs,
 						    bridge->hdmi_audio_max_i2s_playback_channels,
+						    bridge->hdmi_audio_i2s_formats,
 						    bridge->hdmi_audio_spdif_playback,
 						    bridge->hdmi_audio_dai_port);
 		if (ret)

drivers/gpu/drm/display/drm_hdmi_audio_helper.c

···
  * @hdmi_codec_dev: device to be used as a parent for the HDMI Codec
  * @funcs: callbacks for this HDMI Codec
  * @max_i2s_playback_channels: maximum number of playback I2S channels
+ * @i2s_formats: set of I2S formats (use 0 for a bus-specific set)
  * @spdif_playback: set if HDMI codec has S/PDIF playback port
  * @dai_port: sound DAI port, -1 if it is not enabled
  *
···
 				  struct device *hdmi_codec_dev,
 				  const struct drm_connector_hdmi_audio_funcs *funcs,
 				  unsigned int max_i2s_playback_channels,
+				  u64 i2s_formats,
 				  bool spdif_playback,
 				  int dai_port)
 {
···
 		.ops = &drm_connector_hdmi_audio_ops,
 		.max_i2s_channels = max_i2s_playback_channels,
 		.i2s = !!max_i2s_playback_channels,
+		.i2s_formats = i2s_formats,
 		.spdif = spdif_playback,
 		.no_i2s_capture = true,
 		.no_spdif_capture = true,

drivers/gpu/drm/vc4/vc4_hdmi.c

···
 
 	ret = drm_connector_hdmi_audio_init(connector, dev->dev,
 					    &vc4_hdmi_audio_funcs,
-					    8, false, -1);
+					    8, 0, false, -1);
 	if (ret)
 		return ret;
 

include/drm/display/drm_hdmi_audio_helper.h

···
 				  struct device *hdmi_codec_dev,
 				  const struct drm_connector_hdmi_audio_funcs *funcs,
 				  unsigned int max_i2s_playback_channels,
+				  u64 i2s_formats,
 				  bool spdif_playback,
 				  int sound_dai_port);
 void drm_connector_hdmi_audio_plugged_notify(struct drm_connector *connector,

include/drm/drm_bridge.h

···
 	int hdmi_audio_max_i2s_playback_channels;
 
 	/**
+	 * @hdmi_audio_i2s_formats: supported I2S formats, optional. The
+	 * default is to allow all formats supported by the corresponding I2S
+	 * bus driver. This is only used for bridges setting
+	 * @DRM_BRIDGE_OP_HDMI_AUDIO or @DRM_BRIDGE_OP_DP_AUDIO.
+	 */
+	u64 hdmi_audio_i2s_formats;
+
+	/**
 	 * @hdmi_audio_spdif_playback: set if this bridge has S/PDIF playback
 	 * port for @DRM_BRIDGE_OP_HDMI_AUDIO or @DRM_BRIDGE_OP_DP_AUDIO.
 	 */