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[2001:14ba:a0c3:3a00:264b:feff:fe8b:be8a]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-550e70180f7sm672167e87.128.2025.05.16.18.59.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 May 2025 18:59:55 -0700 (PDT) From: Dmitry Baryshkov Date: Sat, 17 May 2025 04:59:44 +0300 Subject: [PATCH v6 08/10] drm/display: bridge-connector: hook in CEC notifier support Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250517-drm-hdmi-connector-cec-v6-8-35651db6f19b@oss.qualcomm.com> References: <20250517-drm-hdmi-connector-cec-v6-0-35651db6f19b@oss.qualcomm.com> In-Reply-To: <20250517-drm-hdmi-connector-cec-v6-0-35651db6f19b@oss.qualcomm.com> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Dave Stevenson , =?utf-8?q?Ma=C3=ADra_Canal?= , Raspberry Pi Kernel Maintenance , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Dmitry Baryshkov X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=3344; i=dmitry.baryshkov@oss.qualcomm.com; h=from:subject:message-id; bh=LMfOqZbcmDFI+UGpgbtzZXyktFHpBBqyKOs2nIEEJWo=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBoJ+2LwoerEyNYi7ihJJAMmqPFArPVA3VlmHCN3 IiEZ71MP8eJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCaCftiwAKCRCLPIo+Aiko 1RYxB/4j1PzOGgcvMIrL6Y/yAmjXrjoiaIyQtPY7SBGeyzLFYpBbOWFsy9l2v/ad2VZdYpJb90S Z3+NqKQa290lV+bJjeOOyY65rfHMKGoe/lMsGzpBVqltcf+R048HtdasvXYhPckf6FqgYxKnTVg zhE7IDPNx/t1WgX/3D5c+KdaWubqyWyAIkUxZCgIMrTC6kN7ZlRaiKatLdAzNeMsAgSFpFBD4V+ upFmVqaL1dINpqiMr0z041KN9TeizUX0Fnslv6ksZIyizbkidwVMpgoL+RODcRQXSUTup4vaGJh ZezI+qMf/8pRN5Mzoz5ELiSmEv+KUFETUaVmspYQKr/cdP8F X-Developer-Key: i=dmitry.baryshkov@oss.qualcomm.com; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A X-Proofpoint-ORIG-GUID: BHNmPzlR69Molo6CKwdyELSUkxfhaDaF X-Authority-Analysis: v=2.4 cv=aIbwqa9m c=1 sm=1 tr=0 ts=6827ed9e cx=c_pps a=oc9J++0uMp73DTRD5QyR2A==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=dt9VzEwgFbYA:10 a=KKAkSRfTAAAA:8 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=wPpwn6IxAmBijdVEDHIA:9 a=QEXdDO2ut3YA:10 a=iYH6xdkBrDN1Jqds4HTS:22 a=cvBusfyB2V15izCimMoJ:22 X-Proofpoint-GUID: BHNmPzlR69Molo6CKwdyELSUkxfhaDaF X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTE3MDAxNyBTYWx0ZWRfXxLicyHXGViQX n7MnOE1oGgNTjFUEAi34LsKTy7HMuS3cervzw4yX3xn+M+r5L07bqG0Ocezxw8EgR5ra2qnoqc6 ukQMgQefkKjMViC5SkXcfdFlAJ70+Rj0xXXzBl2UIjslS48AJaeDuWVAWNv26D2nVszv0DX0r1c MfFBNT9AscF18sY9QaJdLgB8XfEOeu13IEQdxiQcHGhOzT53W+CfpjW0MVJme7XS/XOSWKTt1RY XyPC97BJND3yqDJHMm8ZXjJWbRDvRYVglk2CwxDjyP74MGq2gR4FfEt+WuCJD4jLdYZ3h9hzZJE 070sbdVcZOHbGEcQE4HgPlHhYyigntpYER2nUJRCx3ZhNSBxk/aIlWbpucpkX20xs1X37Oxs4Iz tHxepSGoYLxfnwDYWFEGKJl+pipuJEemE3psrlbkmvLwln6zphmyRS8s4fB3npj/KtPYFuLM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-17_01,2025-05-16_03,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 mlxlogscore=791 malwarescore=0 bulkscore=0 impostorscore=0 clxscore=1015 phishscore=0 suspectscore=0 mlxscore=0 spamscore=0 lowpriorityscore=0 priorityscore=1501 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505070000 definitions=main-2505170017 Allow HDMI DRM bridges to create CEC notifier. Physical address is handled automatically by drm_atomic_helper_connector_hdmi_hotplug() being called from .detect() path. Signed-off-by: Dmitry Baryshkov Reviewed-by: Maxime Ripard Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/display/drm_bridge_connector.c | 24 ++++++++++++++++++++++= ++ include/drm/drm_bridge.h | 11 +++++++++++ 2 files changed, 35 insertions(+) diff --git a/drivers/gpu/drm/display/drm_bridge_connector.c b/drivers/gpu/d= rm/display/drm_bridge_connector.c index 381a0f9d4259bf9f72d3a292b7dcc82e45c61bae..0377dcd691a871643710d667248= b05f8eb9e84d6 100644 --- a/drivers/gpu/drm/display/drm_bridge_connector.c +++ b/drivers/gpu/drm/display/drm_bridge_connector.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include =20 @@ -113,6 +114,13 @@ struct drm_bridge_connector { * &DRM_BRIDGE_OP_DP_AUDIO). */ struct drm_bridge *bridge_dp_audio; + /** + * @bridge_hdmi_cec: + * + * The bridge in the chain that implements CEC support, if any (see + * DRM_BRIDGE_OP_HDMI_CEC_NOTIFIER). + */ + struct drm_bridge *bridge_hdmi_cec; }; =20 #define to_drm_bridge_connector(x) \ @@ -662,6 +670,13 @@ struct drm_connector *drm_bridge_connector_init(struct= drm_device *drm, bridge_connector->bridge_dp_audio =3D bridge; } =20 + if (bridge->ops & DRM_BRIDGE_OP_HDMI_CEC_NOTIFIER) { + if (bridge_connector->bridge_hdmi_cec) + return ERR_PTR(-EBUSY); + + bridge_connector->bridge_hdmi_cec =3D bridge; + } + if (!drm_bridge_get_next_bridge(bridge)) connector_type =3D bridge->type; =20 @@ -724,6 +739,15 @@ struct drm_connector *drm_bridge_connector_init(struct= drm_device *drm, return ERR_PTR(ret); } =20 + if (bridge_connector->bridge_hdmi_cec && + bridge_connector->bridge_hdmi_cec->ops & DRM_BRIDGE_OP_HDMI_CEC_NOTIF= IER) { + ret =3D drmm_connector_hdmi_cec_notifier_register(connector, + NULL, + bridge->hdmi_cec_dev); + if (ret) + return ERR_PTR(ret); + } + drm_connector_helper_add(connector, &drm_bridge_connector_helper_funcs); =20 if (bridge_connector->bridge_hpd) diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index db0d374d863b0b1f774d395743f1e29bb84e8937..0e5f6a007d536215bd50e118464= 33290c2060b9c 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -907,6 +907,11 @@ enum drm_bridge_ops { * flag. */ DRM_BRIDGE_OP_DP_AUDIO =3D BIT(6), + /** + * @DRM_BRIDGE_OP_HDMI_CEC_NOTIFIER: The bridge requires CEC notifier + * to be present. + */ + DRM_BRIDGE_OP_HDMI_CEC_NOTIFIER =3D BIT(7), }; =20 /** @@ -1003,6 +1008,12 @@ struct drm_bridge { */ unsigned int max_bpc; =20 + /** + * @hdmi_cec_dev: device to be used as a containing device for CEC + * functions. + */ + struct device *hdmi_cec_dev; + /** * @hdmi_audio_dev: device to be used as a parent for the HDMI Codec if * either of @DRM_BRIDGE_OP_HDMI_AUDIO or @DRM_BRIDGE_OP_DP_AUDIO is set. --=20 2.39.5