From patchwork Mon May 22 20:08:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 13251037 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 D0B82C77B75 for ; Mon, 22 May 2023 20:09:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234172AbjEVUJC (ORCPT ); Mon, 22 May 2023 16:09:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54780 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233740AbjEVUJB (ORCPT ); Mon, 22 May 2023 16:09:01 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32E9AA9; Mon, 22 May 2023 13:09:00 -0700 (PDT) Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34MK4cjB018597; Mon, 22 May 2023 20:08:48 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : mime-version : content-type; s=qcppdkim1; bh=8Kr04qJlkGRsUIl9kotKM+DyHmR6VvpMs6UPWUKu+zk=; b=F/F+Umz1yEgPd4MM8vdouj96hcAwVMHdhfynQMUphV4Y/oK/kKyv2FxvZN1Opqg8/4kn /p8N3R5ifRYTIjz+5axkld/3htPlB5HeEh3Qo0772Wx8aA0mgHSPS5Dc4wGRd6+InNY9 JEcsI4eGX3tLOXlTuV+amlWv/bZoeMlx6S3HYqyvQiuG6OvCAnXZxEoGVgxXcPtfYIdp I+YDsORkzh/9pYkyEmpZCHxc56soRW/VxHpRCpwiaenEtxKbGtn4pfQ+jFWOeJTF3CG0 wml83dcgWXm7pnqEQfuFLhX2g7JsHuZSrOrxwBXV6rlUZArDUjXottCsIymROfrnEp2Y kA== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3qr4wh1faa-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 22 May 2023 20:08:48 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 34MK8lnE000909 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 22 May 2023 20:08:47 GMT Received: from khsieh-linux1.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Mon, 22 May 2023 13:08:46 -0700 From: Kuogee Hsieh To: , , , , , , , , , , CC: , , , , , , , , Subject: [PATCH v2] drm/msm/dp: enable HDP plugin/unplugged interrupts at hpd_enable/disable Date: Mon, 22 May 2023 13:08:37 -0700 Message-ID: <1684786117-16728-1-git-send-email-quic_khsieh@quicinc.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: w6FnbC9nmNCItFaBwjknTWhcFh0zLOtE X-Proofpoint-GUID: w6FnbC9nmNCItFaBwjknTWhcFh0zLOtE X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-05-22_14,2023-05-22_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 clxscore=1015 priorityscore=1501 malwarescore=0 mlxscore=0 suspectscore=0 bulkscore=0 mlxlogscore=999 impostorscore=0 adultscore=0 phishscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305220170 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The internal_hpd flag was introduced to handle external DP HPD derived from GPIO pinmuxed into DP controller. HPD plug/unplug interrupts cannot be enabled until internal_hpd flag is set to true. At both bootup and resume time, the DP driver will enable external DP plugin interrupts and handle plugin interrupt accordingly. However dp_bridge_hpd_enable() bridge ops function was called to set internal_hpd to true later than where DP driver expected during both bootup and resume time. This prevent DP driver from detecting external plugin interrupt due to HPD related interrupts are not enabled on time. Hence external display can not be lit up properly. Move HPD related interrupts control of both enable/disable HDP hardware block and setup individual interrupt mask bits to dp_bridge_hpd_enable() and dp_bridge_hpd_disable(). Fixes: cd198caddea7 ("drm/msm/dp: Rely on hpd_enable/disable callbacks") Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_catalog.c | 19 ++++++---- drivers/gpu/drm/msm/dp/dp_catalog.h | 2 +- drivers/gpu/drm/msm/dp/dp_display.c | 70 +++++++++++-------------------------- 3 files changed, 35 insertions(+), 56 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index 7a8cf1c..1da711e 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -620,19 +620,26 @@ void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog, config & DP_DP_HPD_INT_MASK); } -void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog) +void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog, bool enable) { struct dp_catalog_private *catalog = container_of(dp_catalog, struct dp_catalog_private, dp_catalog); u32 reftimer = dp_read_aux(catalog, REG_DP_DP_HPD_REFTIMER); - /* Configure REFTIMER and enable it */ - reftimer |= DP_DP_HPD_REFTIMER_ENABLE; - dp_write_aux(catalog, REG_DP_DP_HPD_REFTIMER, reftimer); + if (enable) { + /* Configure REFTIMER and enable it */ + reftimer |= DP_DP_HPD_REFTIMER_ENABLE; + dp_write_aux(catalog, REG_DP_DP_HPD_REFTIMER, reftimer); + + /* Enable HPD */ + dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, DP_DP_HPD_CTRL_HPD_EN); + } else { + reftimer &= ~DP_DP_HPD_REFTIMER_ENABLE; + dp_write_aux(catalog, REG_DP_DP_HPD_REFTIMER, reftimer); - /* Enable HPD */ - dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, DP_DP_HPD_CTRL_HPD_EN); + dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, 0); + } } static void dp_catalog_enable_sdp(struct dp_catalog_private *catalog) diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h index 82376a2..818c036 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.h +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h @@ -104,7 +104,7 @@ bool dp_catalog_ctrl_mainlink_ready(struct dp_catalog *dp_catalog); void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable); void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog, u32 intr_mask, bool en); -void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog); +void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog, bool enable); void dp_catalog_ctrl_config_psr(struct dp_catalog *dp_catalog); void dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool enter); u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog); diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 3e13acdf..fee23e5 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -615,12 +615,6 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) dp->hpd_state = ST_MAINLINK_READY; } - /* enable HDP irq_hpd/replug interrupt */ - if (dp->dp_display.internal_hpd) - dp_catalog_hpd_config_intr(dp->catalog, - DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, - true); - drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n", dp->dp_display.connector_type, state); mutex_unlock(&dp->event_mutex); @@ -658,12 +652,6 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n", dp->dp_display.connector_type, state); - /* disable irq_hpd/replug interrupts */ - if (dp->dp_display.internal_hpd) - dp_catalog_hpd_config_intr(dp->catalog, - DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, - false); - /* unplugged, no more irq_hpd handle */ dp_del_event(dp, EV_IRQ_HPD_INT); @@ -687,10 +675,6 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) return 0; } - /* disable HPD plug interrupts */ - if (dp->dp_display.internal_hpd) - dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, false); - /* * We don't need separate work for disconnect as * connect/attention interrupts are disabled @@ -706,10 +690,6 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) /* signal the disconnect event early to ensure proper teardown */ dp_display_handle_plugged_change(&dp->dp_display, false); - /* enable HDP plug interrupt to prepare for next plugin */ - if (dp->dp_display.internal_hpd) - dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, true); - drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n", dp->dp_display.connector_type, state); @@ -1082,26 +1062,6 @@ void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp) mutex_unlock(&dp_display->event_mutex); } -static void dp_display_config_hpd(struct dp_display_private *dp) -{ - - dp_display_host_init(dp); - dp_catalog_ctrl_hpd_config(dp->catalog); - - /* Enable plug and unplug interrupts only if requested */ - if (dp->dp_display.internal_hpd) - dp_catalog_hpd_config_intr(dp->catalog, - DP_DP_HPD_PLUG_INT_MASK | - DP_DP_HPD_UNPLUG_INT_MASK, - true); - - /* Enable interrupt first time - * we are leaving dp clocks on during disconnect - * and never disable interrupt - */ - enable_irq(dp->irq); -} - void dp_display_set_psr(struct msm_dp *dp_display, bool enter) { struct dp_display_private *dp; @@ -1176,7 +1136,7 @@ static int hpd_event_thread(void *data) switch (todo->event_id) { case EV_HPD_INIT_SETUP: - dp_display_config_hpd(dp_priv); + dp_display_host_init(dp_priv); break; case EV_HPD_PLUG_INT: dp_hpd_plug_handle(dp_priv, todo->data); @@ -1394,13 +1354,8 @@ static int dp_pm_resume(struct device *dev) /* turn on dp ctrl/phy */ dp_display_host_init(dp); - dp_catalog_ctrl_hpd_config(dp->catalog); - - if (dp->dp_display.internal_hpd) - dp_catalog_hpd_config_intr(dp->catalog, - DP_DP_HPD_PLUG_INT_MASK | - DP_DP_HPD_UNPLUG_INT_MASK, - true); + if (dp_display->is_edp) + dp_catalog_ctrl_hpd_config(dp->catalog, true); if (dp_catalog_link_is_connected(dp->catalog)) { /* @@ -1568,7 +1523,7 @@ static int dp_display_get_next_bridge(struct msm_dp *dp) if (aux_bus && dp->is_edp) { dp_display_host_init(dp_priv); - dp_catalog_ctrl_hpd_config(dp_priv->catalog); + dp_catalog_ctrl_hpd_config(dp_priv->catalog, true); dp_display_host_phy_init(dp_priv); enable_irq(dp_priv->irq); @@ -1801,16 +1756,33 @@ void dp_bridge_hpd_enable(struct drm_bridge *bridge) { 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); + + mutex_lock(&dp->event_mutex); + dp_catalog_ctrl_hpd_config(dp->catalog, true); + + /* enable HDP interrupts */ + dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, true); + + enable_irq(dp->irq); dp_display->internal_hpd = true; + mutex_unlock(&dp->event_mutex); } void dp_bridge_hpd_disable(struct drm_bridge *bridge) { 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); + + mutex_lock(&dp->event_mutex); + /* disable HDP interrupts */ + dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false); + dp_catalog_ctrl_hpd_config(dp->catalog, false); dp_display->internal_hpd = false; + mutex_unlock(&dp->event_mutex); } void dp_bridge_hpd_notify(struct drm_bridge *bridge,