From nobody Tue Dec 16 19:55:13 2025 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 42A28EE49B2 for ; Thu, 24 Aug 2023 23:57:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239564AbjHXX5P (ORCPT ); Thu, 24 Aug 2023 19:57:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45340 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238314AbjHXX4n (ORCPT ); Thu, 24 Aug 2023 19:56:43 -0400 Received: from mail-lf1-x135.google.com (mail-lf1-x135.google.com [IPv6:2a00:1450:4864:20::135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 48FE71BC6 for ; Thu, 24 Aug 2023 16:56:40 -0700 (PDT) Received: by mail-lf1-x135.google.com with SMTP id 2adb3069b0e04-5009969be25so528009e87.3 for ; Thu, 24 Aug 2023 16:56:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1692921398; x=1693526198; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=bDIrJrHEN9IjjH/walVLTVgW7q0gzCJ+BB4K5woAJ8Q=; b=dSVqO6lz99C2ZC9MyF4I7dqymaSEJL5BXpXb9JjX53DSIJA1WAgzoxgFAC2100lfW/ KRPplf4GnulYW3+HOqapRLXT2obRLv/ijoNTGQ//ydBgZsLcnrLeV0LavCAmP4ITiTpz w+9WDur+s5msoBcQ6Oq/CPpuciR1h+mkYqqEA/piDZHCW653OnFntWD06Wonjtd1C3Wm oHaQNb9Zp5PZdtjjoujIUKAfR+yWn4L/Xm1nB5XBI1itOp//eiscVsQaVMJuGYUvG0JN 8LwFwuY15H0UEdr0U1fIWCq2oQR4JzQgSBCB2C4n28QJNPL7pA7ciYiCBr7Ox9CoFeNV 7VRw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692921398; x=1693526198; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=bDIrJrHEN9IjjH/walVLTVgW7q0gzCJ+BB4K5woAJ8Q=; b=Gagpl5ffxhgMLLlV/zLWvv4jnRTA8ygHyKcAUcj+AOT99nEbBugUEbPEPuv57HLOFz ob5woyKDQjzl9/S1EXTxyTqHIF96kgnvH9S0v/oJytpAgAgLBjbcIKBW0xRjuLKBn9h7 LFiB4zpCqQzhF0LhOVteQEhgbM6y9JkVOfeRrbRm6xHLshNeuIFNcFIAya7WmOC5zrMQ iT9jjbD4NOC0XYJYWB+L5vLi7uQUa53mehXmnIByrdCx1zQ6BoyZ2sHM5FPM57RmuDY1 jtztWbGd/P4Ja05QRdJn2oQelx6vQ6F8vDnipsB4llcns+sM9A11KVvbneq3mIdUE+4w WK2g== X-Gm-Message-State: AOJu0YwhvCxVGr5ooG2TGriB6aHZwtdtsTtosIFzsWCZvpL8KAN+fTRT hONrvuN9tQbwEetyTp8gw6rD6A== X-Google-Smtp-Source: AGHT+IGbung/yZU7vgc8JMgX0FfV8Ol9VQMaanYzL6Rka2Zl1tPR3SQYUpkhD8yrgKVVt4h6/SMyBQ== X-Received: by 2002:ac2:4ed2:0:b0:500:903f:6084 with SMTP id p18-20020ac24ed2000000b00500903f6084mr5802481lfr.63.1692921398310; Thu, 24 Aug 2023 16:56:38 -0700 (PDT) Received: from umbar.unikie.fi ([192.130.178.91]) by smtp.gmail.com with ESMTPSA id j15-20020ac2454f000000b004fe5688b5dcsm57900lfm.150.2023.08.24.16.56.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Aug 2023 16:56:37 -0700 (PDT) From: Dmitry Baryshkov To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Andy Gross , Bjorn Andersson , Konrad Dybcio , Heikki Krogerus , Greg Kroah-Hartman Cc: Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Simon Ser , Janne Grunau , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, Bjorn Andersson , Hans de Goede Subject: [PATCH v7 1/3] drm: Add HPD state to drm_connector_oob_hotplug_event() Date: Fri, 25 Aug 2023 02:56:34 +0300 Message-Id: <20230824235636.1436665-2-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230824235636.1436665-1-dmitry.baryshkov@linaro.org> References: <20230824235636.1436665-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Bjorn Andersson In some implementations, such as the Qualcomm platforms, the display driver has no way to query the current HPD state and as such it's impossible to distinguish between disconnect and attention events. Add a parameter to drm_connector_oob_hotplug_event() to pass the HPD state. Also push the test for unchanged state in the displayport altmode driver into the i915 driver, to allow other drivers to act upon each update. Signed-off-by: Bjorn Andersson Reviewed-by: Hans de Goede Acked-by: Heikki Krogerus Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/drm_connector.c | 6 ++++-- .../gpu/drm/i915/display/intel_display_core.h | 3 +++ drivers/gpu/drm/i915/display/intel_dp.c | 17 ++++++++++++++--- drivers/usb/typec/altmodes/displayport.c | 17 +++++++++-------- include/drm/drm_connector.h | 6 ++++-- 5 files changed, 34 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connecto= r.c index bf8371dc2a61..a3d3e7dc08b2 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -3049,6 +3049,7 @@ struct drm_connector *drm_connector_find_by_fwnode(st= ruct fwnode_handle *fwnode) /** * drm_connector_oob_hotplug_event - Report out-of-band hotplug event to c= onnector * @connector_fwnode: fwnode_handle to report the event on + * @status: hot plug detect logical state * * On some hardware a hotplug event notification may come from outside the= display * driver / device. An example of this is some USB Type-C setups where the= hardware @@ -3058,7 +3059,8 @@ struct drm_connector *drm_connector_find_by_fwnode(st= ruct fwnode_handle *fwnode) * This function can be used to report these out-of-band events after obta= ining * a drm_connector reference through calling drm_connector_find_by_fwnode(= ). */ -void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnod= e) +void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnod= e, + enum drm_connector_status status) { struct drm_connector *connector; =20 @@ -3067,7 +3069,7 @@ void drm_connector_oob_hotplug_event(struct fwnode_ha= ndle *connector_fwnode) return; =20 if (connector->funcs->oob_hotplug_event) - connector->funcs->oob_hotplug_event(connector); + connector->funcs->oob_hotplug_event(connector, status); =20 drm_connector_put(connector); } diff --git a/drivers/gpu/drm/i915/display/intel_display_core.h b/drivers/gp= u/drm/i915/display/intel_display_core.h index 53e5c33e08c3..ccfe27630fb6 100644 --- a/drivers/gpu/drm/i915/display/intel_display_core.h +++ b/drivers/gpu/drm/i915/display/intel_display_core.h @@ -175,6 +175,9 @@ struct intel_hotplug { /* Whether or not to count short HPD IRQs in HPD storms */ u8 hpd_short_storm_enabled; =20 + /* Last state reported by oob_hotplug_event for each encoder */ + unsigned long oob_hotplug_last_state; + /* * if we get a HPD irq from DP and a HPD irq from non-DP * the non-DP HPD could block the workqueue on a mode config diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915= /display/intel_dp.c index 12bd2f322e62..2af815b5c22b 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -5253,15 +5253,26 @@ static int intel_dp_connector_atomic_check(struct d= rm_connector *conn, return intel_modeset_synced_crtcs(state, conn); } =20 -static void intel_dp_oob_hotplug_event(struct drm_connector *connector) +static void intel_dp_oob_hotplug_event(struct drm_connector *connector, + enum drm_connector_status hpd_state) { struct intel_encoder *encoder =3D intel_attached_encoder(to_intel_connect= or(connector)); struct drm_i915_private *i915 =3D to_i915(connector->dev); + bool hpd_high =3D hpd_state =3D=3D connector_status_connected; + unsigned int hpd_pin =3D encoder->hpd_pin; + bool need_work =3D false; =20 spin_lock_irq(&i915->irq_lock); - i915->display.hotplug.event_bits |=3D BIT(encoder->hpd_pin); + if (hpd_high !=3D test_bit(hpd_pin, &i915->display.hotplug.oob_hotplug_la= st_state)) { + i915->display.hotplug.event_bits |=3D BIT(hpd_pin); + + __assign_bit(hpd_pin, &i915->display.hotplug.oob_hotplug_last_state, hpd= _high); + need_work =3D true; + } spin_unlock_irq(&i915->irq_lock); - queue_delayed_work(i915->unordered_wq, &i915->display.hotplug.hotplug_wor= k, 0); + + if (need_work) + queue_delayed_work(i915->unordered_wq, &i915->display.hotplug.hotplug_wo= rk, 0); } =20 static const struct drm_connector_funcs intel_dp_connector_funcs =3D { diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/a= ltmodes/displayport.c index 426c88a516e5..29f40e658772 100644 --- a/drivers/usb/typec/altmodes/displayport.c +++ b/drivers/usb/typec/altmodes/displayport.c @@ -153,11 +153,11 @@ static int dp_altmode_status_update(struct dp_altmode= *dp) } } } else { - if (dp->hpd !=3D hpd) { - drm_connector_oob_hotplug_event(dp->connector_fwnode); - dp->hpd =3D hpd; - sysfs_notify(&dp->alt->dev.kobj, "displayport", "hpd"); - } + drm_connector_oob_hotplug_event(dp->connector_fwnode, + hpd ? connector_status_connected : + connector_status_disconnected); + dp->hpd =3D hpd; + sysfs_notify(&dp->alt->dev.kobj, "displayport", "hpd"); } =20 return ret; @@ -173,7 +173,8 @@ static int dp_altmode_configured(struct dp_altmode *dp) * configuration is complete to signal HPD. */ if (dp->pending_hpd) { - drm_connector_oob_hotplug_event(dp->connector_fwnode); + drm_connector_oob_hotplug_event(dp->connector_fwnode, + connector_status_connected); sysfs_notify(&dp->alt->dev.kobj, "displayport", "hpd"); dp->pending_hpd =3D false; } @@ -618,8 +619,8 @@ void dp_altmode_remove(struct typec_altmode *alt) cancel_work_sync(&dp->work); =20 if (dp->connector_fwnode) { - if (dp->hpd) - drm_connector_oob_hotplug_event(dp->connector_fwnode); + drm_connector_oob_hotplug_event(dp->connector_fwnode, + connector_status_disconnected); =20 fwnode_handle_put(dp->connector_fwnode); } diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index d300fde6c1a4..5a8115dca359 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1327,7 +1327,8 @@ struct drm_connector_funcs { * This will get called when a hotplug-event for a drm-connector * has been received from a source outside the display driver / device. */ - void (*oob_hotplug_event)(struct drm_connector *connector); + void (*oob_hotplug_event)(struct drm_connector *connector, + enum drm_connector_status status); =20 /** * @debugfs_init: @@ -1971,7 +1972,8 @@ drm_connector_is_unregistered(struct drm_connector *c= onnector) DRM_CONNECTOR_UNREGISTERED; } =20 -void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnod= e); +void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnod= e, + enum drm_connector_status status); const char *drm_get_connector_type_name(unsigned int connector_type); const char *drm_get_connector_status_name(enum drm_connector_status status= ); const char *drm_get_subpixel_order_name(enum subpixel_order order); --=20 2.39.2 From nobody Tue Dec 16 19:55:13 2025 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 539ABEE49B5 for ; Thu, 24 Aug 2023 23:57:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240051AbjHXX5Q (ORCPT ); Thu, 24 Aug 2023 19:57:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45316 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238207AbjHXX4n (ORCPT ); Thu, 24 Aug 2023 19:56:43 -0400 Received: from mail-lf1-x134.google.com (mail-lf1-x134.google.com [IPv6:2a00:1450:4864:20::134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C3B761BC9 for ; Thu, 24 Aug 2023 16:56:40 -0700 (PDT) Received: by mail-lf1-x134.google.com with SMTP id 2adb3069b0e04-50079d148aeso503836e87.3 for ; Thu, 24 Aug 2023 16:56:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1692921399; x=1693526199; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=LTYtN9ceXzi2tGhWn5q5e7ybJcm3lf5yDMeSzJkSqgc=; b=m7m5bNqRLv2ildg7ypzCSl7pzD6YQ2ACEiyr/aKLXnvX3zq0mVdsOmy1hyaXDPTLzr zOWOCUphWttuB6FiZXKEhy87cyNgL2D1hV6fTPfHItg17mDtCwf98piLHMJMyUgngLUp dgl/1kiB3BWEnz3tz1DEQozj7XEpxfJicBRXlzxlODaHVg3R7gu454pBuSToDWNJCOB7 0+3/7VVaIH2R5TD0GzjfXnJPohKpfKbnQxmevWCZauIJDji+Hp00214wfkZhRZNb8o+P RFflNDxkDvkg1U9NFB2E9dOMyOWu7Uwd9cKnHxMwYJbcMXPRD7Tv60s7TxgLFmQwxzqz VJpg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692921399; x=1693526199; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=LTYtN9ceXzi2tGhWn5q5e7ybJcm3lf5yDMeSzJkSqgc=; 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charset="utf-8" In some cases the bridge drivers would like to receive hotplug events even in the case new status is equal to the old status. In the DP case this is used to deliver "attention" messages to the DP host. Stop filtering the events in the drm_bridge_connector_hpd_cb() and let drivers decide whether they would like to receive the event or not. Reviewed-By: Janne Grunau Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/drm_bridge_connector.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_b= ridge_connector.c index 1da93d5a1f61..10b52224db37 100644 --- a/drivers/gpu/drm/drm_bridge_connector.c +++ b/drivers/gpu/drm/drm_bridge_connector.c @@ -113,16 +113,11 @@ static void drm_bridge_connector_hpd_cb(void *cb_data, struct drm_bridge_connector *drm_bridge_connector =3D cb_data; struct drm_connector *connector =3D &drm_bridge_connector->base; struct drm_device *dev =3D connector->dev; - enum drm_connector_status old_status; =20 mutex_lock(&dev->mode_config.mutex); - old_status =3D connector->status; connector->status =3D status; mutex_unlock(&dev->mode_config.mutex); =20 - if (old_status =3D=3D status) - return; - drm_bridge_connector_hpd_notify(connector, status); =20 drm_kms_helper_connector_hotplug_event(connector); --=20 2.39.2 From nobody Tue Dec 16 19:55:13 2025 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 64A8BEE49B4 for ; 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Thu, 24 Aug 2023 16:56:39 -0700 (PDT) Received: from umbar.unikie.fi ([192.130.178.91]) by smtp.gmail.com with ESMTPSA id j15-20020ac2454f000000b004fe5688b5dcsm57900lfm.150.2023.08.24.16.56.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Aug 2023 16:56:39 -0700 (PDT) From: Dmitry Baryshkov To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Andy Gross , Bjorn Andersson , Konrad Dybcio , Heikki Krogerus , Greg Kroah-Hartman Cc: Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Simon Ser , Janne Grunau , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org Subject: [PATCH v7 3/3] drm/bridge_connector: implement oob_hotplug_event Date: Fri, 25 Aug 2023 02:56:36 +0300 Message-Id: <20230824235636.1436665-4-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230824235636.1436665-1-dmitry.baryshkov@linaro.org> References: <20230824235636.1436665-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Implement the oob_hotplug_event() callback. Translate it to the HPD notification sent to the HPD bridge in the chain. Reviewed-by: Janne Grunau Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/drm_bridge_connector.c | 29 +++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_b= ridge_connector.c index 10b52224db37..3aa129b3f8e9 100644 --- a/drivers/gpu/drm/drm_bridge_connector.c +++ b/drivers/gpu/drm/drm_bridge_connector.c @@ -5,6 +5,8 @@ =20 #include #include +#include +#include #include =20 #include @@ -107,10 +109,9 @@ static void drm_bridge_connector_hpd_notify(struct drm= _connector *connector, } } =20 -static void drm_bridge_connector_hpd_cb(void *cb_data, - enum drm_connector_status status) +static void drm_bridge_connector_handle_hpd(struct drm_bridge_connector *d= rm_bridge_connector, + enum drm_connector_status status) { - struct drm_bridge_connector *drm_bridge_connector =3D cb_data; struct drm_connector *connector =3D &drm_bridge_connector->base; struct drm_device *dev =3D connector->dev; =20 @@ -123,6 +124,21 @@ static void drm_bridge_connector_hpd_cb(void *cb_data, drm_kms_helper_connector_hotplug_event(connector); } =20 +static void drm_bridge_connector_hpd_cb(void *cb_data, + enum drm_connector_status status) +{ + drm_bridge_connector_handle_hpd(cb_data, status); +} + +static void drm_bridge_connector_oob_hotplug_event(struct drm_connector *c= onnector, + enum drm_connector_status status) +{ + struct drm_bridge_connector *bridge_connector =3D + to_drm_bridge_connector(connector); + + drm_bridge_connector_handle_hpd(bridge_connector, status); +} + static void drm_bridge_connector_enable_hpd(struct drm_connector *connecto= r) { struct drm_bridge_connector *bridge_connector =3D @@ -216,6 +232,7 @@ static const struct drm_connector_funcs drm_bridge_conn= ector_funcs =3D { .atomic_duplicate_state =3D drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state =3D drm_atomic_helper_connector_destroy_state, .debugfs_init =3D drm_bridge_connector_debugfs_init, + .oob_hotplug_event =3D drm_bridge_connector_oob_hotplug_event, }; =20 /* -----------------------------------------------------------------------= ------ @@ -352,6 +369,12 @@ struct drm_connector *drm_bridge_connector_init(struct= drm_device *drm, if (!drm_bridge_get_next_bridge(bridge)) connector_type =3D bridge->type; =20 +#ifdef CONFIG_OF + if (!drm_bridge_get_next_bridge(bridge) && + bridge->of_node) + connector->fwnode =3D fwnode_handle_get(of_fwnode_handle(bridge->of_nod= e)); +#endif + if (bridge->ddc) ddc =3D bridge->ddc; =20 --=20 2.39.2