From patchwork Wed Mar 30 16:02:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sankeerth Billakanti (QUIC)" X-Patchwork-Id: 12796084 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3697FC433EF for ; Wed, 30 Mar 2022 16:03:32 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 27F3B10E3EC; Wed, 30 Mar 2022 16:03:31 +0000 (UTC) Received: from alexa-out-sd-01.qualcomm.com (alexa-out-sd-01.qualcomm.com [199.106.114.38]) by gabe.freedesktop.org (Postfix) with ESMTPS id 22A2A10E558; Wed, 30 Mar 2022 16:03:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1648656210; x=1680192210; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=Kkj8uAcKOeSduapYDdHTtLiuFh+RlwdgPHGirWi3/nY=; b=tJNul+QASXo/tAF7Sc5cAT2mVBBdU3pPMlY4wvG25QpBOm3u+eck98Ci ICxDmbC+q4251ZpTWBELMOuk2hXtZt10zqpI53JbVssceXGOENysWR5my q7ub4GYN3X5W+j1Sh5oqxTbjBLEw/uOfIo40Gy83ek/Z67zULN936yxLB A=; Received: from unknown (HELO ironmsg04-sd.qualcomm.com) ([10.53.140.144]) by alexa-out-sd-01.qualcomm.com with ESMTP; 30 Mar 2022 09:03:29 -0700 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg04-sd.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Mar 2022 09:03:29 -0700 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Wed, 30 Mar 2022 09:03:28 -0700 Received: from sbillaka-linux.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 15.2.986.22; Wed, 30 Mar 2022 09:03:22 -0700 From: Sankeerth Billakanti To: , , , , Subject: [PATCH v6 1/8] drm/msm/dp: Add eDP support via aux_bus Date: Wed, 30 Mar 2022 21:32:52 +0530 Message-ID: <1648656179-10347-2-git-send-email-quic_sbillaka@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1648656179-10347-1-git-send-email-quic_sbillaka@quicinc.com> References: <1648656179-10347-1-git-send-email-quic_sbillaka@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: quic_kalyant@quicinc.com, Sankeerth Billakanti , dianders@chromium.org, bjorn.andersson@linaro.org, quic_vproddut@quicinc.com, airlied@linux.ie, quic_abhinavk@quicinc.com, swboyd@chromium.org, seanpaul@chromium.org, dmitry.baryshkov@linaro.org, quic_aravindh@quicinc.com, quic_khsieh@quicinc.com, sean@poorly.run Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This patch adds support for generic eDP sink through aux_bus. The eDP/DP controller driver should support aux transactions originating from the panel-edp driver and hence should be initialized and ready. The panel bridge supporting the panel should be ready before the bridge connector is initialized. The generic panel probe needs the controller resources to be enabled to support the aux transactions originating from the panel probe. Signed-off-by: Sankeerth Billakanti --- Changes in v6: - Remove initialization - Fix aux_bus node leak - Split the patches drivers/gpu/drm/msm/dp/dp_display.c | 54 +++++++++++++++++++++++++++++++++++-- drivers/gpu/drm/msm/dp/dp_drm.c | 10 ++++--- drivers/gpu/drm/msm/dp/dp_parser.c | 21 +-------------- drivers/gpu/drm/msm/dp/dp_parser.h | 1 + 4 files changed, 60 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 382b3aa..e082d02 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -10,6 +10,7 @@ #include #include #include +#include #include "msm_drv.h" #include "msm_kms.h" @@ -265,8 +266,6 @@ static int dp_display_bind(struct device *dev, struct device *master, goto end; } - dp->dp_display.next_bridge = dp->parser->next_bridge; - dp->aux->drm_dev = drm; rc = dp_aux_register(dp->aux); if (rc) { @@ -1524,6 +1523,53 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) } } +static int dp_display_get_next_bridge(struct msm_dp *dp) +{ + int rc; + struct dp_display_private *dp_priv; + struct device_node *aux_bus; + struct device *dev; + + dp_priv = container_of(dp, struct dp_display_private, dp_display); + dev = &dp_priv->pdev->dev; + aux_bus = of_get_child_by_name(dev->of_node, "aux-bus"); + + if (aux_bus) { + dp_display_host_init(dp_priv); + dp_catalog_ctrl_hpd_config(dp_priv->catalog); + enable_irq(dp_priv->irq); + dp_display_host_phy_init(dp_priv); + + devm_of_dp_aux_populate_ep_devices(dp_priv->aux); + + disable_irq(dp_priv->irq); + of_node_put(aux_bus); + } + + /* + * External bridges are mandatory for eDP interfaces: one has to + * provide at least an eDP panel (which gets wrapped into panel-bridge). + * + * For DisplayPort interfaces external bridges are optional, so + * silently ignore an error if one is not present (-ENODEV). + */ + rc = dp_parser_find_next_bridge(dp_priv->parser); + if (rc == -ENODEV) { + if (dp->connector_type == DRM_MODE_CONNECTOR_eDP) { + DRM_ERROR("eDP: next bridge is not present\n"); + return rc; + } + } else if (rc) { + if (rc != -EPROBE_DEFER) + DRM_ERROR("DP: error parsing next bridge: %d\n", rc); + return rc; + } + + dp->next_bridge = dp_priv->parser->next_bridge; + + return 0; +} + int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, struct drm_encoder *encoder) { @@ -1547,6 +1593,10 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, dp_display->encoder = encoder; + ret = dp_display_get_next_bridge(dp_display); + if (ret) + return ret; + dp_display->bridge = dp_bridge_init(dp_display, dev, encoder); if (IS_ERR(dp_display->bridge)) { ret = PTR_ERR(dp_display->bridge); diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c index 7ce1aca..5254bd6 100644 --- a/drivers/gpu/drm/msm/dp/dp_drm.c +++ b/drivers/gpu/drm/msm/dp/dp_drm.c @@ -114,10 +114,12 @@ struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device * bridge->funcs = &dp_bridge_ops; bridge->type = dp_display->connector_type; - bridge->ops = - DRM_BRIDGE_OP_DETECT | - DRM_BRIDGE_OP_HPD | - DRM_BRIDGE_OP_MODES; + if (bridge->type == DRM_MODE_CONNECTOR_DisplayPort) { + bridge->ops = + DRM_BRIDGE_OP_DETECT | + DRM_BRIDGE_OP_HPD | + DRM_BRIDGE_OP_MODES; + } rc = drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR); if (rc) { diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c index 1056b8d..6317dce 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.c +++ b/drivers/gpu/drm/msm/dp/dp_parser.c @@ -265,7 +265,7 @@ static int dp_parser_clock(struct dp_parser *parser) return 0; } -static int dp_parser_find_next_bridge(struct dp_parser *parser) +int dp_parser_find_next_bridge(struct dp_parser *parser) { struct device *dev = &parser->pdev->dev; struct drm_bridge *bridge; @@ -300,25 +300,6 @@ static int dp_parser_parse(struct dp_parser *parser, int connector_type) if (rc) return rc; - /* - * External bridges are mandatory for eDP interfaces: one has to - * provide at least an eDP panel (which gets wrapped into panel-bridge). - * - * For DisplayPort interfaces external bridges are optional, so - * silently ignore an error if one is not present (-ENODEV). - */ - rc = dp_parser_find_next_bridge(parser); - if (rc == -ENODEV) { - if (connector_type == DRM_MODE_CONNECTOR_eDP) { - DRM_ERROR("eDP: next bridge is not present\n"); - return rc; - } - } else if (rc) { - if (rc != -EPROBE_DEFER) - DRM_ERROR("DP: error parsing next bridge: %d\n", rc); - return rc; - } - /* Map the corresponding regulator information according to * version. Currently, since we only have one supported platform, * mapping the regulator directly. diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h index d371bae..091ff41 100644 --- a/drivers/gpu/drm/msm/dp/dp_parser.h +++ b/drivers/gpu/drm/msm/dp/dp_parser.h @@ -140,5 +140,6 @@ struct dp_parser { * can be parsed using this module. */ struct dp_parser *dp_parser_get(struct platform_device *pdev); +int dp_parser_find_next_bridge(struct dp_parser *parser); #endif