From patchwork Fri Sep 16 20:00:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 607197 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6614DECAAD8 for ; Fri, 16 Sep 2022 20:11:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230082AbiIPULW (ORCPT ); Fri, 16 Sep 2022 16:11:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41632 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229794AbiIPULU (ORCPT ); Fri, 16 Sep 2022 16:11:20 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 12CDA2BFE; Fri, 16 Sep 2022 13:11:20 -0700 (PDT) Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 28GG3dTd002186; Fri, 16 Sep 2022 20:11:15 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=Sn9BnKHGg3BDZ9Mr+NMcSywdQxJIRp9frbHS+w0FENA=; b=JU+qxLImG4g/TTVDnGHpjDCoU/MNthoin1GdZp47YvvNolH/um6sYTD4sD19FUiQz81P S+bwkd7Tn1BrvAdeX8SUdJ5A66CHc9Bq0HudjPxkfIUTzuY5b31pzEhmNg7TMx85jnc2 ZyqIW7ngPhDTAZBTY2UICH9ltZbdostCTq/+Gp85fMu1JoTYoyptwIZv0stommcAU11O /0A80tvSSt2U1uOswGI05RvNt8Gtp4m4sn3mSdqSkkQEaicFC7OztDP1e5lwBamaDWT4 7NfzGDh5gJynxUHwgsjCApJRkicsNHFlcUwCxB086SinFo1uFIVYT1D5+SpCT7dzNa4v 9g== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3jm93acv6y-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 16 Sep 2022 20:11:15 +0000 Received: from nalasex01c.na.qualcomm.com (nalasex01c.na.qualcomm.com [10.47.97.35]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 28GK0bSw013962 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 16 Sep 2022 20:00:37 GMT Received: from core-thresher1.qualcomm.com (10.80.80.8) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.29; Fri, 16 Sep 2022 13:00:36 -0700 From: Bjorn Andersson To: Rob Clark , Abhinav Kumar , Dmitry Baryshkov CC: Rob Herring , Krzysztof Kozlowski , Stephen Boyd , Kuogee Hsieh , Sankeerth Billakanti , , , , , Subject: [PATCH v2 5/7] drm/msm/dp: Implement hpd_notify() Date: Fri, 16 Sep 2022 13:00:26 -0700 Message-ID: <20220916200028.25009-6-quic_bjorande@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220916200028.25009-1-quic_bjorande@quicinc.com> References: <20220916200028.25009-1-quic_bjorande@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: nmC6opvOtpM0b8Cr0LhW4zVydhRKyqYV X-Proofpoint-ORIG-GUID: nmC6opvOtpM0b8Cr0LhW4zVydhRKyqYV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-09-16_12,2022-09-16_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 spamscore=0 priorityscore=1501 impostorscore=0 mlxscore=0 phishscore=0 mlxlogscore=924 bulkscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2209160144 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Bjorn Andersson The DisplayPort controller's hot-plug mechanism is based on pinmuxing a physical signal no a GPIO pin into the controller. This is not always possible, either because there aren't dedicated GPIOs available or because the hot-plug signal is a virtual notification, in cases such as USB Type-C. For these cases, by implementing the hpd_notify() callback for the DisplayPort controller's drm_bridge, a downstream drm_bridge (next_bridge) can be used to track and signal the connection status changes. This makes it possible to use downstream drm_bridges such as display-connector or any virtual mechanism, as long as they are implemented as a drm_bridge. Signed-off-by: Bjorn Andersson [bjorn: Drop connector->fwnode assignment and dev from struct msm_dp] Signed-off-by: Bjorn Andersson --- drivers/gpu/drm/msm/dp/dp_display.c | 22 ++++++++++++++++++++++ drivers/gpu/drm/msm/dp/dp_drm.c | 1 + drivers/gpu/drm/msm/dp/dp_drm.h | 2 ++ 3 files changed, 25 insertions(+) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 699f28f2251e..a4563a0753b0 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1765,3 +1765,25 @@ void dp_bridge_mode_set(struct drm_bridge *drm_bridge, dp_display->dp_mode.h_active_low = !!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC); } + +void dp_bridge_hpd_notify(struct drm_bridge *bridge, + enum drm_connector_status status) +{ + struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge); + struct msm_dp *dp_display = dp_bridge->dp_display; + struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display); + + /* Without next_bridge interrupts are handled by the DP core directly */ + if (!dp_display->next_bridge) + return; + + if (!dp->core_initialized) { + drm_dbg_dp(dp->drm_dev, "not initialized\n"); + return; + } + + if (!dp_display->is_connected && status == connector_status_connected) + dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0); + else if (dp_display->is_connected && status == connector_status_disconnected) + dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0); +} diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c index 6df25f7662e7..1a02ec029fdd 100644 --- a/drivers/gpu/drm/msm/dp/dp_drm.c +++ b/drivers/gpu/drm/msm/dp/dp_drm.c @@ -68,6 +68,7 @@ static const struct drm_bridge_funcs dp_bridge_ops = { .mode_valid = dp_bridge_mode_valid, .get_modes = dp_bridge_get_modes, .detect = dp_bridge_detect, + .hpd_notify = dp_bridge_hpd_notify, }; struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev, diff --git a/drivers/gpu/drm/msm/dp/dp_drm.h b/drivers/gpu/drm/msm/dp/dp_drm.h index 82035dbb0578..79e6b2cf2d25 100644 --- a/drivers/gpu/drm/msm/dp/dp_drm.h +++ b/drivers/gpu/drm/msm/dp/dp_drm.h @@ -32,5 +32,7 @@ enum drm_mode_status dp_bridge_mode_valid(struct drm_bridge *bridge, void dp_bridge_mode_set(struct drm_bridge *drm_bridge, const struct drm_display_mode *mode, const struct drm_display_mode *adjusted_mode); +void dp_bridge_hpd_notify(struct drm_bridge *bridge, + enum drm_connector_status status); #endif /* _DP_DRM_H_ */