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Message-Id: <20241122-drm-bridge-hdmi-connector-v4-6-b4d69d6e3bd9@linaro.org>
Date: Fri, 22 Nov 2024 02:47:36 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: 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>,
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>,
Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
Phong LE <ple@...libre.com>, Inki Dae <inki.dae@...sung.com>,
Seung-Woo Kim <sw0312.kim@...sung.com>,
Kyungmin Park <kyungmin.park@...sung.com>,
Krzysztof Kozlowski <krzk@...nel.org>,
Alim Akhtar <alim.akhtar@...sung.com>, Russell King <linux@...linux.org.uk>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Sandy Huang <hjc@...k-chips.com>,
Heiko Stübner <heiko@...ech.de>,
Andy Yan <andy.yan@...k-chips.com>, Alain Volmat <alain.volmat@...s.st.com>,
Raphael Gallais-Pou <rgallaispou@...il.com>
Cc: Jani Nikula <jani.nikula@...ux.intel.com>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
linux-sound@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-samsung-soc@...r.kernel.org, linux-mediatek@...ts.infradead.org,
linux-rockchip@...ts.infradead.org
Subject: [PATCH v4 6/7] drm/display/hdmi: implement connector update
functions
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 <dmitry.baryshkov@...aro.org>
---
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_
--
2.39.5
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