From patchwork Mon Apr 22 18:45:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Anderson X-Patchwork-Id: 13638831 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 0F2E9C10F15 for ; Mon, 22 Apr 2024 18:46:45 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A70F9112CEB; Mon, 22 Apr 2024 18:46:43 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=linux.dev header.i=@linux.dev header.b="oDEq5oij"; dkim-atps=neutral Received: from out-180.mta0.migadu.com (out-180.mta0.migadu.com [91.218.175.180]) by gabe.freedesktop.org (Postfix) with ESMTPS id BB7DA112CE5 for ; Mon, 22 Apr 2024 18:46:25 +0000 (UTC) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1713811583; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+CogjN3acB3+vV+8SCv672LGBoCQduo6GilyAiW/HPs=; b=oDEq5oij1nflTfCpvhhL87tZlKoNxWgF2rqK3vmK/3jnT3IB2M8WebR2f6WlHDu8DV7Uv1 Yqsq35RUuwncVzbMV9fFee1Q3wE8k59xLoKcfzTxnvzLDuEDM2EyX97pJo0leKkh22RDjg iPUP/WywJlgmSEWlqd+CYwfAnZBcLYs= From: Sean Anderson To: Laurent Pinchart , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , dri-devel@lists.freedesktop.org Cc: David Airlie , Daniel Vetter , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Michal Simek , Sean Anderson Subject: [PATCH v3 12/13] drm: zynqmp_dp: Take dp->lock in zynqmp_dp_hpd_work_func Date: Mon, 22 Apr 2024 14:45:52 -0400 Message-Id: <20240422184553.3573009-13-sean.anderson@linux.dev> In-Reply-To: <20240422184553.3573009-1-sean.anderson@linux.dev> References: <20240422184553.3573009-1-sean.anderson@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add a non-locking version of zynqmp_dp_bridge_detect and use it in zynqmp_dp_hpd_work_func so we can take the lock explicitly. This will make it easier to check for hpd_ignore when we add debugfs support. Signed-off-by: Sean Anderson --- Changes in v3: - New drivers/gpu/drm/xlnx/zynqmp_dp.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c index 364caaf26f49..dea4b8a819fd 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dp.c +++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c @@ -1552,14 +1552,13 @@ static int zynqmp_dp_bridge_atomic_check(struct drm_bridge *bridge, return 0; } -static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *bridge) +static enum drm_connector_status __zynqmp_dp_bridge_detect(struct zynqmp_dp *dp) { - struct zynqmp_dp *dp = bridge_to_dp(bridge); struct zynqmp_dp_link_config *link_config = &dp->link_config; u32 state, i; int ret; - mutex_lock(&dp->lock); + lockdep_assert_held(&dp->lock); /* * This is from heuristic. It takes some delay (ex, 100 ~ 500 msec) to @@ -1588,16 +1587,27 @@ static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *brid dp->num_lanes); dp->status = connector_status_connected; - mutex_unlock(&dp->lock); return connector_status_connected; } disconnected: dp->status = connector_status_disconnected; - mutex_unlock(&dp->lock); return connector_status_disconnected; } + +static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *bridge) +{ + struct zynqmp_dp *dp = bridge_to_dp(bridge); + enum drm_connector_status ret; + + mutex_lock(&dp->lock); + ret = __zynqmp_dp_bridge_detect(dp); + mutex_unlock(&dp->lock); + + return ret; +} + static struct edid *zynqmp_dp_bridge_get_edid(struct drm_bridge *bridge, struct drm_connector *connector) { @@ -1651,7 +1661,10 @@ static void zynqmp_dp_hpd_work_func(struct work_struct *work) struct zynqmp_dp *dp = container_of(work, struct zynqmp_dp, hpd_work); enum drm_connector_status status; - status = zynqmp_dp_bridge_detect(&dp->bridge); + mutex_lock(&dp->lock); + status = __zynqmp_dp_bridge_detect(dp); + mutex_unlock(&dp->lock); + drm_bridge_hpd_notify(&dp->bridge, status); }