From patchwork Thu Aug 24 23:56:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 13364894 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 D0258EE49A6 for ; Thu, 24 Aug 2023 23:57:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234167AbjHXX5O (ORCPT ); Thu, 24 Aug 2023 19:57:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45354 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238209AbjHXX4n (ORCPT ); Thu, 24 Aug 2023 19:56:43 -0400 Received: from mail-lj1-x22f.google.com (mail-lj1-x22f.google.com [IPv6:2a00:1450:4864:20::22f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 490301BC7 for ; Thu, 24 Aug 2023 16:56:40 -0700 (PDT) Received: by mail-lj1-x22f.google.com with SMTP id 38308e7fff4ca-2b95d5ee18dso4816171fa.1 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=Ca78CaM/CnqaZ5yMiTjGb3JtLN9ied/rmeB9GEWVKXYYhfw+gFtdoSP0eE0hbRavgp RHVROgqnmOdQcTiU0fd3mKtAGdS8rYi3isi7hH5NVHgBXqOkZAsDr48WzNz8Pi1Vwn4x thdFx6l/AXQ/v9IPgsz7SysqrxoenF31A9Y/t6fKYtJZ2ASnI6T2wq1Kb9/jY5kqtRHG vnOtBJ8pgnoi1NTTflZGt+uNHe+eKIFcYKBtp5WQLjkQPAmEOQksEBkMG9RLK85dWlfg 3+oRDMproWCYusMd1zGr4lV6YwqL8Nj3WA21LZXE1EHNpVEX93tIXVUkvaK+yoEQXo7m gXwQ== X-Gm-Message-State: AOJu0YxkPnYeMWI3junZC4QMpScFE+bQkZzH2dOA1vImqRX/L3Lx1/uB siLeGgYDs6QVnHE6yhqSwo0L+w== 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 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org 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_connector.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(struct fwnode_handle *fwnode) /** * drm_connector_oob_hotplug_event - Report out-of-band hotplug event to connector * @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(struct fwnode_handle *fwnode) * This function can be used to report these out-of-band events after obtaining * a drm_connector reference through calling drm_connector_find_by_fwnode(). */ -void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode) +void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode, + enum drm_connector_status status) { struct drm_connector *connector; @@ -3067,7 +3069,7 @@ void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode) return; if (connector->funcs->oob_hotplug_event) - connector->funcs->oob_hotplug_event(connector); + connector->funcs->oob_hotplug_event(connector, status); drm_connector_put(connector); } diff --git a/drivers/gpu/drm/i915/display/intel_display_core.h b/drivers/gpu/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; + /* 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 drm_connector *conn, return intel_modeset_synced_crtcs(state, conn); } -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 = intel_attached_encoder(to_intel_connector(connector)); struct drm_i915_private *i915 = to_i915(connector->dev); + bool hpd_high = hpd_state == connector_status_connected; + unsigned int hpd_pin = encoder->hpd_pin; + bool need_work = false; spin_lock_irq(&i915->irq_lock); - i915->display.hotplug.event_bits |= BIT(encoder->hpd_pin); + if (hpd_high != test_bit(hpd_pin, &i915->display.hotplug.oob_hotplug_last_state)) { + i915->display.hotplug.event_bits |= BIT(hpd_pin); + + __assign_bit(hpd_pin, &i915->display.hotplug.oob_hotplug_last_state, hpd_high); + need_work = true; + } spin_unlock_irq(&i915->irq_lock); - queue_delayed_work(i915->unordered_wq, &i915->display.hotplug.hotplug_work, 0); + + if (need_work) + queue_delayed_work(i915->unordered_wq, &i915->display.hotplug.hotplug_work, 0); } static const struct drm_connector_funcs intel_dp_connector_funcs = { diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/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 != hpd) { - drm_connector_oob_hotplug_event(dp->connector_fwnode); - dp->hpd = 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 = hpd; + sysfs_notify(&dp->alt->dev.kobj, "displayport", "hpd"); } 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 = false; } @@ -618,8 +619,8 @@ void dp_altmode_remove(struct typec_altmode *alt) cancel_work_sync(&dp->work); 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); 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); /** * @debugfs_init: @@ -1971,7 +1972,8 @@ drm_connector_is_unregistered(struct drm_connector *connector) DRM_CONNECTOR_UNREGISTERED; } -void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode); +void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode, + 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);