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Sat, 30 Nov 2024 16:44:30 -0800 (PST) From: Dmitry Baryshkov Date: Sun, 01 Dec 2024 02:44:10 +0200 Subject: [PATCH v5 6/9] drm/display/hdmi: implement connector update functions Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241201-drm-bridge-hdmi-connector-v5-6-b5316e82f61a@linaro.org> References: <20241201-drm-bridge-hdmi-connector-v5-0-b5316e82f61a@linaro.org> In-Reply-To: <20241201-drm-bridge-hdmi-connector-v5-0-b5316e82f61a@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=4091; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=h4SDlLdLeTf2M3phGYhMa3icgLWVQxFU2Yi+KA0yVFA=; b=owGbwMvMwMXYbdNlx6SpcZXxtFoSQ7r3xggGN//LkX2OGwV+txgy3vuXMVki+fujBVtzTye9y q9pS1zVyWjMwsDIxSArpsjiU9AyNWZTctiHHVPrYQaxMoFN4eIUgBt9joOh27iqbFpIUtNcDtZZ E+VVG5nEZcsFbRfqPXNbWnZNvPuYgbuBgYfj2QflllV+25J428zve53mfPtNiu2apdg+hYVyKu3 tDnuf/9SNNzN6aPNWhd3pxJxr2pmXj5/bpHLHW6lDU/vHgkkTfUu8+FxbDGf9emDpc7VG9oRJgO ocyb/JNx6LTnOwza+17atl/3Ph/LIwkwVyoQ5RUTO0I5ru/ubcv44l812kxC82CeP93+oLlmT4/ VST2sex6/TfE8yXfjw7+idpwjOV2Rd1nDpmLZNKjVnwvGrat0L7O7m3whMOPIrufzLpqaN3167E gKWqSpybPTTdG+zz2zYmPj2q82lhYu9bwzXv6g2WsQAA 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 driver utilizing HDMI Connector framework. Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/display/drm_hdmi_state_helper.c | 59 +++++++++++++++++++++++++ include/drm/display/drm_hdmi_state_helper.h | 5 +++ 2 files changed, 64 insertions(+) diff --git a/drivers/gpu/drm/display/drm_hdmi_state_helper.c b/drivers/gpu/drm/display/drm_hdmi_state_helper.c index feb7a3a759811aed70c679be8704072093e2a79b..2230b7fc92cfee46a9cad2479edce71822d30934 100644 --- a/drivers/gpu/drm/display/drm_hdmi_state_helper.c +++ b/drivers/gpu/drm/display/drm_hdmi_state_helper.c @@ -748,3 +748,62 @@ 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_update_edid - Update the HDMI Connector basing on passed EDID + * @connector: A pointer to the HDMI connector + * @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 of + * the drivers should be able to use @drm_atomic_helper_connector_hdmi_update() + * instead. + * + * Returns: + * Zero on success, error code on failure. + */ +int +drm_atomic_helper_connector_hdmi_update_edid(struct drm_connector *connector, + const struct drm_edid *drm_edid) +{ + drm_edid_connector_update(connector, drm_edid); + + if (!drm_edid) { + drm_connector_hdmi_codec_plugged_notify(connector, false); + + // TODO: also handle CEC and scramber, HDMI sink disconnected. + + return 0; + } + + drm_connector_hdmi_codec_plugged_notify(connector, true); + + // TODO: also handle CEC and scramber, HDMI sink is now connected. + + return 0; +} +EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_update_edid); + +/** + * drm_atomic_helper_connector_hdmi_update - Update the HDMI Connector after reading the EDID + * @connector: A pointer to the HDMI connector + * + * 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_update(struct drm_connector *connector) +{ + const struct drm_edid *drm_edid; + int ret; + + drm_edid = drm_edid_read(connector); + ret = drm_atomic_helper_connector_hdmi_update_edid(connector, drm_edid); + drm_edid_free(drm_edid); + + return ret; +} +EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_update); diff --git a/include/drm/display/drm_hdmi_state_helper.h b/include/drm/display/drm_hdmi_state_helper.h index 2d45fcfa461985065a5e5ad67eddc0b1c556d526..61c43e744051886ba5f2024197fcc90688670ebe 100644 --- a/include/drm/display/drm_hdmi_state_helper.h +++ b/include/drm/display/drm_hdmi_state_helper.h @@ -6,6 +6,7 @@ struct drm_atomic_state; struct drm_connector; struct drm_connector_state; +struct drm_edid; struct hdmi_audio_infoframe; void __drm_atomic_helper_connector_hdmi_reset(struct drm_connector *connector, @@ -20,4 +21,8 @@ int drm_atomic_helper_connector_hdmi_clear_audio_infoframe(struct drm_connector int drm_atomic_helper_connector_hdmi_update_infoframes(struct drm_connector *connector, struct drm_atomic_state *state); +int drm_atomic_helper_connector_hdmi_update_edid(struct drm_connector *connector, + const struct drm_edid *drm_edid); +int drm_atomic_helper_connector_hdmi_update(struct drm_connector *connector); + #endif // DRM_HDMI_STATE_HELPER_H_