linux-kernel - [PATCH v3 09/10] drm/bridge: allow limiting I2S formats

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Message-Id: <20250126-drm-hdmi-connector-cec-v3-9-5b5b2d4956da@linaro.org>
Date: Sun, 26 Jan 2025 15:29:14 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Dave Stevenson <dave.stevenson@...pberrypi.com>, 
 Maíra Canal <mcanal@...lia.com>, 
 Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>, 
 Andrzej Hajda <andrzej.hajda@...el.com>, 
 Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, 
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 09/10] 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.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/gpu/drm/display/drm_bridge_connector.c  | 1 +
 drivers/gpu/drm/display/drm_hdmi_audio_helper.c | 2 ++
 drivers/gpu/drm/vc4/vc4_hdmi.c                  | 2 +-
 include/drm/display/drm_hdmi_audio_helper.h     | 1 +
 include/drm/drm_bridge.h                        | 5 +++++
 5 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/display/drm_bridge_connector.c b/drivers/gpu/drm/display/drm_bridge_connector.c
index 5b77fd59d79abddd419e611a7868b001857ccb37..28055bc2e7069d738bbe76b16c3bbde06f2d6e4e 100644
--- a/drivers/gpu/drm/display/drm_bridge_connector.c
+++ b/drivers/gpu/drm/display/drm_bridge_connector.c
@@ -698,6 +698,7 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
 							    bridge->hdmi_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)
diff --git a/drivers/gpu/drm/display/drm_hdmi_audio_helper.c b/drivers/gpu/drm/display/drm_hdmi_audio_helper.c
index 05afc9f0bdd6b6f00d74223a9d8875e6d16aea5f..589b0bd6c21366b83bd4d1131e89c71644ebc401 100644
--- a/drivers/gpu/drm/display/drm_hdmi_audio_helper.c
+++ b/drivers/gpu/drm/display/drm_hdmi_audio_helper.c
@@ -154,6 +154,7 @@ int drm_connector_hdmi_audio_init(struct drm_connector *connector,
 				  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)
 {
@@ -161,6 +162,7 @@ int drm_connector_hdmi_audio_init(struct drm_connector *connector,
 		.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,
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 1108983c44858382cb9f09b686956903645ebe0a..fcaba4a64a33b2267b22960772c2977b4109c67f 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -582,7 +582,7 @@ static int vc4_hdmi_connector_init(struct drm_device *dev,
 
 	ret = drm_connector_hdmi_audio_init(connector, dev->dev,
 					    &vc4_hdmi_audio_funcs,
-					    8, false, -1);
+					    8, 0, false, -1);
 	if (ret)
 		return ret;
 
diff --git a/include/drm/display/drm_hdmi_audio_helper.h b/include/drm/display/drm_hdmi_audio_helper.h
index c9a6faef4109f20ba79b610a9d5e8d5980efe2d1..44d910bdc72dd2fdbbe7ada65b67080d4a41e88b 100644
--- a/include/drm/display/drm_hdmi_audio_helper.h
+++ b/include/drm/display/drm_hdmi_audio_helper.h
@@ -14,6 +14,7 @@ int drm_connector_hdmi_audio_init(struct drm_connector *connector,
 				  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,
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index b55e80a57758e8b652eac0cd01cb245a04e221f5..d16af5fe90cb48f6671e798d9dee61a359c9233f 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -920,6 +920,11 @@ struct drm_bridge {
 	 */
 	int hdmi_audio_max_i2s_playback_channels;
 
+	/**
+	 * @hdmi_audio_i2s_formats: supported I2S formats, optional
+	 */
+	u64 hdmi_audio_i2s_formats;
+
 	/**
 	 * @hdmi_audio_spdif_playback: set if HDMI codec has S/PDIF playback port
 	 */

-- 
2.39.5