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Fri, 06 Dec 2024 02:16:56 -0800 (PST) From: Dmitry Baryshkov Date: Fri, 06 Dec 2024 12:16:00 +0200 Subject: [PATCH v6 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: <20241206-drm-bridge-hdmi-connector-v6-6-50dc145a9c06@linaro.org> References: <20241206-drm-bridge-hdmi-connector-v6-0-50dc145a9c06@linaro.org> In-Reply-To: <20241206-drm-bridge-hdmi-connector-v6-0-50dc145a9c06@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=4668; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=cLr7rcMCKctpWvNtnt4BFuThw021W03l57sijxoziRQ=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnUs8J3TYcPOcFa14DxHDG+xCfnhUgeaSE3pmsZ R3RuvxUPtiJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ1LPCQAKCRCLPIo+Aiko 1bY7B/4+CK2IPr0ZGyjRDhrjaTsOqjmocrfgRtyl3xVEfwHzU9LuHdX6kQQeAuBpj8yrhP95Lrc mJaqwUlGlJVWI2p41ZWrO45zfQXvGkclr3viN4DqtVp1wOkUrySmjzdDtwWb8O955/CXSlOkPj4 shNBlMA/0EzPl4Sey9z5n5owN0nB1SFzkv7pXmLDh+ueroDtWgyLV6lM8aK/oC2d2vB3p5NonFj iq5QAwa4io9tByWFbLUrhaD3YP49rrj6olPhm2uUF+4vE+bhp+jb5smE9iwO6URvP0KGtG7W5Y8 gww2J/ZuOGHRT1+pbIcV3exbZQ1jdd0TnTjcc8oprf9DeMWO 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. Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/display/drm_hdmi_state_helper.c | 61 +++++++++++++++++++++++++ include/drm/display/drm_hdmi_state_helper.h | 8 ++++ 2 files changed, 69 insertions(+) diff --git a/drivers/gpu/drm/display/drm_hdmi_state_helper.c b/drivers/gpu/drm/display/drm_hdmi_state_helper.c index 80bf2829ba89b5f84fed4fa9eb1d6302e10a4f9e..4cdeb63688b9e48acd8e8ae87a45b6253f7dd12b 100644 --- a/drivers/gpu/drm/display/drm_hdmi_state_helper.c +++ b/drivers/gpu/drm/display/drm_hdmi_state_helper.c @@ -769,3 +769,64 @@ drm_atomic_helper_connector_hdmi_clear_audio_infoframe(struct drm_connector *con return ret; } EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_clear_audio_infoframe); + +/** + * drm_atomic_helper_connector_hdmi_hotplug_edid - Handle the hotplug event for the HDMI connector passing custom EDID + * @connector: A pointer to the HDMI connector + * @status: Connection status + * @drm_edid: EDID to process + * + * This function should be called as a part of the .detect() / .detect_ctx() + * and .force() callbacks, updating the HDMI-specific connector's data. Most + * drivers should be able to use @drm_atomic_helper_connector_hdmi_hotplug() + * instead. + * + * Returns: + * Zero on success, error code on failure. + */ +int +drm_atomic_helper_connector_hdmi_hotplug_edid(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_codec_plugged_notify(connector, false); + } + + drm_edid_connector_update(connector, drm_edid); + + if (status == connector_status_connected) { + // TODO: also handle CEC and scramber, HDMI sink is now connected. + drm_connector_hdmi_codec_plugged_notify(connector, true); + } + + return 0; +} +EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_hotplug_edid); + +/** + * 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() + * and .force() callbacks, updating the HDMI-specific connector's data. + * + * Returns: + * Zero on success, error code on failure. + */ +int +drm_atomic_helper_connector_hdmi_hotplug(struct drm_connector *connector, + enum drm_connector_status status) +{ + const struct drm_edid *drm_edid; + int ret; + + drm_edid = drm_edid_read(connector); + ret = drm_atomic_helper_connector_hdmi_hotplug_edid(connector, status, drm_edid); + drm_edid_free(drm_edid); + + return ret; +} +EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_hotplug); diff --git a/include/drm/display/drm_hdmi_state_helper.h b/include/drm/display/drm_hdmi_state_helper.h index d6d65da6d8f9ee46de33114cce2d6fbe6098a862..4ffd40d73d50d89449508b7a5ce5836a596638a1 100644 --- a/include/drm/display/drm_hdmi_state_helper.h +++ b/include/drm/display/drm_hdmi_state_helper.h @@ -6,8 +6,11 @@ struct drm_atomic_state; struct drm_connector; struct drm_connector_state; +struct drm_edid; 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 +22,11 @@ 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); +int drm_atomic_helper_connector_hdmi_hotplug(struct drm_connector *connector, + enum drm_connector_status status); +int drm_atomic_helper_connector_hdmi_hotplug_edid(struct drm_connector *connector, + enum drm_connector_status status, + const struct drm_edid *drm_edid); enum drm_mode_status drm_hdmi_connector_mode_valid(struct drm_connector *connector,