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Mon, 23 Dec 2024 17:48:13 -0800 (PST) From: Dmitry Baryshkov Date: Tue, 24 Dec 2024 03:47:58 +0200 Subject: [PATCH v10 06/10] drm/display/hdmi: implement hotplug functions Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241224-drm-bridge-hdmi-connector-v10-6-dc89577cd438@linaro.org> References: <20241224-drm-bridge-hdmi-connector-v10-0-dc89577cd438@linaro.org> In-Reply-To: <20241224-drm-bridge-hdmi-connector-v10-0-dc89577cd438@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 , Jaroslav Kysela , Takashi Iwai , Liam Girdwood , Mark Brown , Phong LE , Inki Dae , Seung-Woo Kim , Kyungmin Park , Krzysztof Kozlowski , Alim Akhtar , Russell King , Chun-Kuang Hu , Philipp Zabel , Matthias Brugger , AngeloGioacchino Del Regno , Sandy Huang , =?utf-8?q?Heiko_St=C3=BCbner?= , Andy Yan , Alain Volmat , Raphael Gallais-Pou , Dave Stevenson , =?utf-8?q?Ma=C3=ADra_Cana?= =?utf-8?q?l?= , Raspberry Pi Kernel Maintenance Cc: Jani Nikula , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=6555; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=2s0WLoIO3OfL4EsRz0mMJb2gfo20/WlMm825XzWtaMs=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnahLNxMawD6cVknB37e5e3k5Uhm/mSz2wAhYpK H+rJ2bQm5CJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ2oSzQAKCRCLPIo+Aiko 1b9cB/0dqEXjqOcrvKbfKLUvLoZMXrr5x2OCQ3fyzEVeYrVc2yBzdJORHvsa7QE4Zhf5c/cEKvB bwUDvNqn8vx9YzVp4YoUrw2C6RNy5pRNjDSGhB/Lz7fazOYWRKoED1/PRtEGWl/EB43bQi+XOmK Z3Dq/EfeLI8b7hC9TCTwkl8L5xn5vSfH3+ROGVwkvWaUWy+7s5QGRZf0jGKv73p6qEba4P4hJWl +hUCMMbwprsSUDF7uA2/5FscifFml78DWTgYnvUyNCsQhjb07wRVN8I+zEzlIpVQ7H0vSMNJPV8 zjTSYLf5UbyFr42aEeqsljxDDrEK5kes+XG1jaU2kKnqdam1 X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A The HDMI Connectors need to perform a variety of tasks when the HDMI connector state changes. Such tasks include setting or invalidating CEC address, notifying HDMI codec driver, updating scrambler data, etc. Implementing such tasks in a driver-specific callbacks is error prone. Start implementing the generic helper function (currently handling only the HDMI Codec framework) to be used by drivers utilizing HDMI Connector framework. Reviewed-by: Maxime Ripard Tested-by: Dave Stevenson Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/display/Kconfig | 1 + drivers/gpu/drm/display/drm_hdmi_state_helper.c | 57 +++++++++++++++++++++++++ include/drm/display/drm_hdmi_state_helper.h | 5 +++ include/drm/drm_connector.h | 16 +++++++ 4 files changed, 79 insertions(+) diff --git a/drivers/gpu/drm/display/Kconfig b/drivers/gpu/drm/display/Kconfig index 2619fa2476eb149e1befc3135131ed5aaeb5bb4c..8d22b7627d41f7bc015decf24ae02a05bc00f055 100644 --- a/drivers/gpu/drm/display/Kconfig +++ b/drivers/gpu/drm/display/Kconfig @@ -89,6 +89,7 @@ config DRM_DISPLAY_HDMI_HELPER config DRM_DISPLAY_HDMI_STATE_HELPER bool + select DRM_DISPLAY_HDMI_AUDIO_HELPER select DRM_DISPLAY_HDMI_HELPER help DRM KMS state helpers for HDMI. diff --git a/drivers/gpu/drm/display/drm_hdmi_state_helper.c b/drivers/gpu/drm/display/drm_hdmi_state_helper.c index d678c635a6935050ca9c1ccafbb0865f21df5d4e..cfc2aaee1da08a103cbf933c891d5cc31b0886a8 100644 --- a/drivers/gpu/drm/display/drm_hdmi_state_helper.c +++ b/drivers/gpu/drm/display/drm_hdmi_state_helper.c @@ -5,6 +5,7 @@ #include #include +#include #include #include @@ -777,3 +778,59 @@ drm_atomic_helper_connector_hdmi_clear_audio_infoframe(struct drm_connector *con return ret; } EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_clear_audio_infoframe); + +static void +drm_atomic_helper_connector_hdmi_update(struct drm_connector *connector, + enum drm_connector_status status) +{ + const struct drm_edid *drm_edid; + + if (status == connector_status_disconnected) { + // TODO: also handle CEC and scramber, HDMI sink disconnected. + drm_connector_hdmi_audio_plugged_notify(connector, false); + } + + if (connector->hdmi.funcs->read_edid) + drm_edid = connector->hdmi.funcs->read_edid(connector); + else + drm_edid = drm_edid_read(connector); + + drm_edid_connector_update(connector, drm_edid); + + drm_edid_free(drm_edid); + + if (status == connector_status_connected) { + // TODO: also handle CEC and scramber, HDMI sink is now connected. + drm_connector_hdmi_audio_plugged_notify(connector, true); + } +} + +/** + * drm_atomic_helper_connector_hdmi_hotplug - Handle the hotplug event for the HDMI connector + * @connector: A pointer to the HDMI connector + * @status: Connection status + * + * This function should be called as a part of the .detect() / .detect_ctx() + * callbacks, updating the HDMI-specific connector's data. + */ +void drm_atomic_helper_connector_hdmi_hotplug(struct drm_connector *connector, + enum drm_connector_status status) +{ + drm_atomic_helper_connector_hdmi_update(connector, status); +} +EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_hotplug); + +/** + * drm_atomic_helper_connector_hdmi_force - HDMI Connector implementation of the force callback + * @connector: A pointer to the HDMI connector + * + * This function implements the .force() callback for the HDMI connectors. It + * can either be used directly as the callback or should be called from within + * the .force() callback implementation to maintain the HDMI-specific + * connector's data. + */ +void drm_atomic_helper_connector_hdmi_force(struct drm_connector *connector) +{ + drm_atomic_helper_connector_hdmi_update(connector, connector->status); +} +EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_force); diff --git a/include/drm/display/drm_hdmi_state_helper.h b/include/drm/display/drm_hdmi_state_helper.h index d6d65da6d8f9ee46de33114cce2d6fbe6098a862..9ae19f3caf727f9a0fe06e6afe5fc46db924444f 100644 --- a/include/drm/display/drm_hdmi_state_helper.h +++ b/include/drm/display/drm_hdmi_state_helper.h @@ -8,6 +8,8 @@ struct drm_connector; struct drm_connector_state; struct hdmi_audio_infoframe; +enum drm_connector_status; + void __drm_atomic_helper_connector_hdmi_reset(struct drm_connector *connector, struct drm_connector_state *new_conn_state); @@ -19,6 +21,9 @@ int drm_atomic_helper_connector_hdmi_update_audio_infoframe(struct drm_connector int drm_atomic_helper_connector_hdmi_clear_audio_infoframe(struct drm_connector *connector); int drm_atomic_helper_connector_hdmi_update_infoframes(struct drm_connector *connector, struct drm_atomic_state *state); +void drm_atomic_helper_connector_hdmi_hotplug(struct drm_connector *connector, + enum drm_connector_status status); +void drm_atomic_helper_connector_hdmi_force(struct drm_connector *connector); enum drm_mode_status drm_hdmi_connector_mode_valid(struct drm_connector *connector, diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 1d4c27948e8750191e7daf8ff6cda97d944905b4..f13d597370a30dc1b14c630ee00145256052ba56 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -45,6 +45,7 @@ struct drm_property; struct drm_property_blob; struct drm_printer; struct drm_privacy_screen; +struct drm_edid; struct edid; struct hdmi_codec_daifmt; struct hdmi_codec_params; @@ -1247,6 +1248,21 @@ struct drm_connector_hdmi_funcs { int (*write_infoframe)(struct drm_connector *connector, enum hdmi_infoframe_type type, const u8 *buffer, size_t len); + + /** + * @read_edid: + * + * This callback is used by the framework as a replacement for reading + * the EDID from connector->ddc. It is still recommended to provide + * connector->ddc instead of implementing this callback. Returned EDID + * should be freed via the drm_edid_free(). + * + * The @read_edid callback is optional. + * + * Returns: + * Valid EDID on success, NULL in case of failure. + */ + const struct drm_edid *(*read_edid)(struct drm_connector *connector); }; /**