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Wed, 19 Feb 2025 05:00:35 -0800 (PST) From: Dmitry Baryshkov Date: Wed, 19 Feb 2025 15:00:30 +0200 Subject: [PATCH v3 1/2] drm/bridge: split HDMI Audio from DRM_BRIDGE_OP_HDMI Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250219-dp-hdmi-audio-v3-1-42900f034b40@linaro.org> References: <20250219-dp-hdmi-audio-v3-0-42900f034b40@linaro.org> In-Reply-To: <20250219-dp-hdmi-audio-v3-0-42900f034b40@linaro.org> To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Clark , Abhinav Kumar , Sean Paul , Marijn Suijten , Hermes Wu Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=7153; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=5tKH69LPnXtw2g2lgp5pOEeBRn775Kcy79G0bglGhPo=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBntdXx5Rfpjs7QrSW5Sqc27lyKyEYdNlobBgrno dH0zn3wNMGJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ7XV8QAKCRCLPIo+Aiko 1faVCACwzQ+HmZRWj9pVGQ0FxDqNILIlaX1r5rQYmr/5OkHPuBlFez/H2reFj80/208eWC3Jt/F 4w/dszTC6Mavd98pVxDwG4uLrBN4WRB0vz01gg2HJ8A5HflmMSVkzyTKKi3zYgPdL7qbHdTjfKL 7CBu5YlwG2xFNiph1dNcADSY1oOjWZSXDKm5haeaxq6OMz/TLcuRa/72FlA27hrbopzWxhAydDh nP4mmhmTtUhD1ow/wTNud8BRWS7PJ5nLHJ7Gmz43lxg0uKcJ3vS+HorkhfSSmXT1J3rddFOOHpx aMrbBOlYFaZIm7QchyZUQ9R763/xbRGymttkFBrrrv8ir15h X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A As pointed out by Laurent, OP bits are supposed to describe operations. Split DRM_BRIDGE_OP_HDMI_AUDIO from DRM_BRIDGE_OP_HDMI instead of overloading DRM_BRIDGE_OP_HDMI. Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/bridge/lontium-lt9611.c | 2 +- drivers/gpu/drm/display/drm_bridge_connector.c | 59 +++++++++++++++++-----= ---- include/drm/drm_bridge.h | 23 ++++++++-- 3 files changed, 59 insertions(+), 25 deletions(-) diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/brid= ge/lontium-lt9611.c index e650cd83fc8d880012edb8a85c69b2f1d378f64c..6cb9039ee7c4720b3512adb5a59= 1b1b84ee32107 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611.c @@ -1134,7 +1134,7 @@ static int lt9611_probe(struct i2c_client *client) lt9611->bridge.of_node =3D client->dev.of_node; lt9611->bridge.ops =3D DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES | - DRM_BRIDGE_OP_HDMI; + DRM_BRIDGE_OP_HDMI | DRM_BRIDGE_OP_HDMI_AUDIO; lt9611->bridge.type =3D DRM_MODE_CONNECTOR_HDMIA; lt9611->bridge.vendor =3D "Lontium"; lt9611->bridge.product =3D "LT9611"; diff --git a/drivers/gpu/drm/display/drm_bridge_connector.c b/drivers/gpu/d= rm/display/drm_bridge_connector.c index 30c736fc0067e31a97db242e5b16ea8a5b4cf359..030f98d454608a63154827c65d4= 822d378df3b4c 100644 --- a/drivers/gpu/drm/display/drm_bridge_connector.c +++ b/drivers/gpu/drm/display/drm_bridge_connector.c @@ -98,6 +98,13 @@ struct drm_bridge_connector { * HDMI connector infrastructure, if any (see &DRM_BRIDGE_OP_HDMI). */ struct drm_bridge *bridge_hdmi; + /** + * @bridge_hdmi_audio: + * + * The bridge in the chain that implements necessary support for the + * HDMI Audio infrastructure, if any (see &DRM_BRIDGE_OP_HDMI_AUDIO). + */ + struct drm_bridge *bridge_hdmi_audio; }; =20 #define to_drm_bridge_connector(x) \ @@ -433,7 +440,7 @@ static int drm_bridge_connector_audio_startup(struct dr= m_connector *connector) to_drm_bridge_connector(connector); struct drm_bridge *bridge; =20 - bridge =3D bridge_connector->bridge_hdmi; + bridge =3D bridge_connector->bridge_hdmi_audio; if (!bridge) return -EINVAL; =20 @@ -451,7 +458,7 @@ static int drm_bridge_connector_audio_prepare(struct dr= m_connector *connector, to_drm_bridge_connector(connector); struct drm_bridge *bridge; =20 - bridge =3D bridge_connector->bridge_hdmi; + bridge =3D bridge_connector->bridge_hdmi_audio; if (!bridge) return -EINVAL; =20 @@ -464,7 +471,7 @@ static void drm_bridge_connector_audio_shutdown(struct = drm_connector *connector) to_drm_bridge_connector(connector); struct drm_bridge *bridge; =20 - bridge =3D bridge_connector->bridge_hdmi; + bridge =3D bridge_connector->bridge_hdmi_audio; if (!bridge) return; =20 @@ -478,7 +485,7 @@ static int drm_bridge_connector_audio_mute_stream(struc= t drm_connector *connecto to_drm_bridge_connector(connector); struct drm_bridge *bridge; =20 - bridge =3D bridge_connector->bridge_hdmi; + bridge =3D bridge_connector->bridge_hdmi_audio; if (!bridge) return -EINVAL; =20 @@ -576,6 +583,21 @@ struct drm_connector *drm_bridge_connector_init(struct= drm_device *drm, max_bpc =3D bridge->max_bpc; } =20 + if (bridge->ops & DRM_BRIDGE_OP_HDMI_AUDIO) { + if (bridge_connector->bridge_hdmi_audio) + return ERR_PTR(-EBUSY); + + if (!bridge->hdmi_audio_max_i2s_playback_channels && + !bridge->hdmi_audio_spdif_playback) + return ERR_PTR(-EINVAL); + + if (!bridge->funcs->hdmi_audio_prepare || + !bridge->funcs->hdmi_audio_shutdown) + return ERR_PTR(-EINVAL); + + bridge_connector->bridge_hdmi_audio =3D bridge; + } + if (!drm_bridge_get_next_bridge(bridge)) connector_type =3D bridge->type; =20 @@ -611,22 +633,6 @@ struct drm_connector *drm_bridge_connector_init(struct= drm_device *drm, max_bpc); if (ret) return ERR_PTR(ret); - - if (bridge->hdmi_audio_max_i2s_playback_channels || - bridge->hdmi_audio_spdif_playback) { - if (!bridge->funcs->hdmi_audio_prepare || - !bridge->funcs->hdmi_audio_shutdown) - return ERR_PTR(-EINVAL); - - ret =3D drm_connector_hdmi_audio_init(connector, - bridge->hdmi_audio_dev, - &drm_bridge_connector_hdmi_audio_funcs, - bridge->hdmi_audio_max_i2s_playback_channels, - bridge->hdmi_audio_spdif_playback, - bridge->hdmi_audio_dai_port); - if (ret) - return ERR_PTR(ret); - } } else { ret =3D drmm_connector_init(drm, connector, &drm_bridge_connector_funcs, @@ -635,6 +641,19 @@ struct drm_connector *drm_bridge_connector_init(struct= drm_device *drm, return ERR_PTR(ret); } =20 + if (bridge_connector->bridge_hdmi_audio) { + bridge =3D bridge_connector->bridge_hdmi_audio; + + ret =3D drm_connector_hdmi_audio_init(connector, + bridge->hdmi_audio_dev, + &drm_bridge_connector_hdmi_audio_funcs, + bridge->hdmi_audio_max_i2s_playback_channels, + bridge->hdmi_audio_spdif_playback, + bridge->hdmi_audio_dai_port); + if (ret) + return ERR_PTR(ret); + } + drm_connector_helper_add(connector, &drm_bridge_connector_helper_funcs); =20 if (bridge_connector->bridge_hpd) diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 496dbbd2ad7edff7f091adfbe62de1e33ef0cf07..90b7b8070748a104ffca021e669= f78e4d4b993e7 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -693,8 +693,10 @@ struct drm_bridge_funcs { /** * @hdmi_audio_prepare: * Configures HDMI-encoder for audio stream. Can be called multiple - * times for each setup. Mandatory if HDMI audio is enabled in the - * bridge's configuration. + * times for each setup. + * + * This callback is optional but it must be implemented by bridges that + * set the DRM_BRIDGE_OP_HDMI_AUDIO flag in their &drm_bridge->ops. * * Returns: * 0 on success, a negative error code otherwise @@ -707,8 +709,10 @@ struct drm_bridge_funcs { /** * @hdmi_audio_shutdown: * - * Shut down the audio stream. Mandatory if HDMI audio is enabled in - * the bridge's configuration. + * Shut down the audio stream. + * + * This callback is optional but it must be implemented by bridges that + * set the DRM_BRIDGE_OP_HDMI_AUDIO flag in their &drm_bridge->ops. * * Returns: * 0 on success, a negative error code otherwise @@ -814,6 +818,17 @@ enum drm_bridge_ops { * drivers. */ DRM_BRIDGE_OP_HDMI =3D BIT(4), + /** + * @DRM_BRIDGE_OP_HDMI_AUDIO: The bridge provides HDMI audio operations. + * Bridges that set this flag must implement the + * &drm_bridge_funcs->hdmi_audio_prepare and + * &drm_bridge_funcs->hdmi_audio_shutdown callbacks. + * + * Note: currently there can be at most one bridge in a chain that sets + * this bit. This is to simplify corresponding glue code in connector + * drivers. + */ + DRM_BRIDGE_OP_HDMI_AUDIO =3D BIT(5), }; =20 /** --=20 2.39.5