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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241201-drm-bridge-hdmi-connector-v5-7-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_Canal?= , 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=4107; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=yRmYAaGG5FuJnzbiAwK+r8Wa4ofx1aRyHEGe3Ks/gxw=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnS7FY195bWef1JWzfBClWB4oHD1yzTC9EFWMzD 80mNHc4qGeJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ0uxWAAKCRCLPIo+Aiko 1WzCB/9dbK/ZL6sq0Z7J3uaSWrvo3v868opAAukc6WNxiaV18XuCxz1ddbnDi63j79YdQb5B8GP D0KYTNeGLC5UNMe6kDdKQJdRdGu7ziyexcz8z0ahYZ9B7SzemDlaGs9gLyk0P9W5R368lIIu/Se Bn49wArWPZi4BhJHy1u6QiBWJM9uNBWvGsUqnu329vDvgUYww9US9Iuif3+7YTjhkYVtT8N7avI woTrJfPaHazIr/m+2iKsIgFy6NXIiGqDUgLWv80FAnpxXW5sX25muyz7cAXbC28cNDik6ZPCIYy pgiATl7OmZDXqwI8VuDxI8l378ZDecWH//5U6eNsb1he4Mh6 X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A Extend drm_bridge_connector code to read the EDID and use it to update connector status if the bridge chain implements HDMI bridge. Performing it from the generic location minimizes individual bridge's code and enforces standard behaviour from all corresponding drivers. Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/display/drm_bridge_connector.c | 67 ++++++++++++++++++++--= ---- 1 file changed, 53 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/display/drm_bridge_connector.c b/drivers/gpu/d= rm/display/drm_bridge_connector.c index 12ab9f14cc8a8672478ae2804c9a68d766d88ea5..71ae3b2c9049016d1cc0d39a787= f6461633efd53 100644 --- a/drivers/gpu/drm/display/drm_bridge_connector.c +++ b/drivers/gpu/drm/display/drm_bridge_connector.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include =20 @@ -175,17 +176,55 @@ static void drm_bridge_connector_disable_hpd(struct d= rm_connector *connector) * Bridge Connector Functions */ =20 +static const struct drm_edid * +drm_bridge_connector_read_edid(struct drm_connector *connector, + enum drm_connector_status status) +{ + struct drm_bridge_connector *bridge_connector =3D + to_drm_bridge_connector(connector); + const struct drm_edid *drm_edid; + struct drm_bridge *bridge; + + bridge =3D bridge_connector->bridge_edid; + if (!bridge) + return NULL; + + if (status !=3D connector_status_connected) + return NULL; + + drm_edid =3D drm_bridge_edid_read(bridge, connector); + if (!drm_edid_valid(drm_edid)) { + drm_edid_free(drm_edid); + return NULL; + } + + return drm_edid; +} + static enum drm_connector_status drm_bridge_connector_detect(struct drm_connector *connector, bool force) { struct drm_bridge_connector *bridge_connector =3D to_drm_bridge_connector(connector); struct drm_bridge *detect =3D bridge_connector->bridge_detect; + struct drm_bridge *hdmi =3D bridge_connector->bridge_hdmi; enum drm_connector_status status; =20 if (detect) { status =3D detect->funcs->detect(detect); =20 + if (hdmi) { + const struct drm_edid *drm_edid; + int ret; + + drm_edid =3D drm_bridge_connector_read_edid(connector, status); + ret =3D drm_atomic_helper_connector_hdmi_update_edid(connector, drm_edi= d); + if (ret) + drm_warn(connector->dev, "updating EDID failed with %d\n", ret); + + drm_edid_free(drm_edid); + } + drm_bridge_connector_hpd_notify(connector, status); } else { switch (connector->connector_type) { @@ -246,29 +285,29 @@ static const struct drm_connector_funcs drm_bridge_co= nnector_funcs =3D { static int drm_bridge_connector_get_modes_edid(struct drm_connector *conne= ctor, struct drm_bridge *bridge) { + struct drm_bridge_connector *bridge_connector =3D + to_drm_bridge_connector(connector); + struct drm_bridge *hdmi =3D bridge_connector->bridge_hdmi; enum drm_connector_status status; const struct drm_edid *drm_edid; - int n; =20 status =3D drm_bridge_connector_detect(connector, false); if (status !=3D connector_status_connected) - goto no_edid; + return 0; =20 - drm_edid =3D drm_bridge_edid_read(bridge, connector); - if (!drm_edid_valid(drm_edid)) { + /* In HDMI setup the EDID has been read and handled as a part of .detect(= ) */ + if (!hdmi) { + drm_edid =3D drm_bridge_connector_read_edid(connector, status); + if (!drm_edid) { + drm_edid_connector_update(connector, NULL); + return 0; + } + + drm_edid_connector_update(connector, drm_edid); drm_edid_free(drm_edid); - goto no_edid; } =20 - drm_edid_connector_update(connector, drm_edid); - n =3D drm_edid_connector_add_modes(connector); - - drm_edid_free(drm_edid); - return n; - -no_edid: - drm_edid_connector_update(connector, NULL); - return 0; + return drm_edid_connector_add_modes(connector); } =20 static int drm_bridge_connector_get_modes(struct drm_connector *connector) --=20 2.39.5