From nobody Wed Dec 17 20:46:55 2025 Received: from out-170.mta1.migadu.com (out-170.mta1.migadu.com [95.215.58.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3E2071607A3 for ; Fri, 9 Aug 2024 19:36:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.170 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723232198; cv=none; b=peRIIXRbmkIhJJsZzsb3FAgOJI7HtsGVFZj1Nzf2VjiyZTZPgH/iEKtV22rjdtQ65Y26AfCvjjsjuyEE2abwdvF3Fq8OMpJ4xoNnAs5gw8PGYk9K9Whco6BFkwPOWy660jQM/5rSh7cLwArMr30oNR5BSwfNs2Ktm60NaVqTQdI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723232198; c=relaxed/simple; bh=0fSJl10Wfz/WiOqEdLqluBRz9Ww3o4AEuDmsIsMpqmk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Rz7mhnXRozHbPwfotZvN9Ckjo/Z64Lk2rjP+xs1dK/nxO6BHaHbYkYw7xnYzDEFkqXdvIpBz/Yn8kznhFel59bXRHxC8bIuDWKM/jT/PCi/81YIgnBY2zam1z9r4g80gM9/WInthXLRamTU3yI/0ecYVj2Fu1BzLQaeAuwPRf2M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=LMn+NvlH; arc=none smtp.client-ip=95.215.58.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="LMn+NvlH" 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=1723232194; 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=E7CIj8q4tM0sAgHaW8MP8eR835TxAvTZNNma/3Wy8v8=; b=LMn+NvlH7irQNqV/QM3q8852JuMKybyGWRDKWLvqzWifxmU40zKQ7prVaryy6As85hVv+n +8j8nU9hxE0psilplvAQK1C+D8kA8IvEl0csOA2VMQnjoh0VyLJrKTwLKG132xtosrLX6B UcPL2xLoPJ5dMg88DwUKkTg6QbE7znc= From: Sean Anderson To: Laurent Pinchart , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, David Airlie , Michal Simek , Daniel Vetter , Tomi Valkeinen , Sean Anderson Subject: [PATCH v6 7/8] drm: zynqmp_dp: Take dp->lock in zynqmp_dp_hpd_work_func Date: Fri, 9 Aug 2024 15:35:59 -0400 Message-Id: <20240809193600.3360015-8-sean.anderson@linux.dev> In-Reply-To: <20240809193600.3360015-1-sean.anderson@linux.dev> References: <20240809193600.3360015-1-sean.anderson@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" 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 --- (no changes since v3) Changes in v3: - New drivers/gpu/drm/xlnx/zynqmp_dp.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp= _dp.c index e0ab3b3e8580..f5203ffa3c75 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dp.c +++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c @@ -1567,14 +1567,13 @@ static int zynqmp_dp_bridge_atomic_check(struct drm= _bridge *bridge, return 0; } =20 -static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge= *bridge) +static enum drm_connector_status __zynqmp_dp_bridge_detect(struct zynqmp_d= p *dp) { - struct zynqmp_dp *dp =3D bridge_to_dp(bridge); struct zynqmp_dp_link_config *link_config =3D &dp->link_config; u32 state, i; int ret; =20 - mutex_lock(&dp->lock); + lockdep_assert_held(&dp->lock); =20 /* * This is from heuristic. It takes some delay (ex, 100 ~ 500 msec) to @@ -1603,16 +1602,26 @@ static enum drm_connector_status zynqmp_dp_bridge_d= etect(struct drm_bridge *brid dp->num_lanes); =20 dp->status =3D connector_status_connected; - mutex_unlock(&dp->lock); return connector_status_connected; } =20 disconnected: dp->status =3D connector_status_disconnected; - mutex_unlock(&dp->lock); return connector_status_disconnected; } =20 +static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge= *bridge) +{ + struct zynqmp_dp *dp =3D bridge_to_dp(bridge); + enum drm_connector_status ret; + + mutex_lock(&dp->lock); + ret =3D __zynqmp_dp_bridge_detect(dp); + mutex_unlock(&dp->lock); + + return ret; +} + static const struct drm_edid *zynqmp_dp_bridge_edid_read(struct drm_bridge= *bridge, struct drm_connector *connector) { @@ -1696,7 +1705,10 @@ static void zynqmp_dp_hpd_work_func(struct work_stru= ct *work) struct zynqmp_dp *dp =3D container_of(work, struct zynqmp_dp, hpd_work); enum drm_connector_status status; =20 - status =3D zynqmp_dp_bridge_detect(&dp->bridge); + mutex_lock(&dp->lock); + status =3D __zynqmp_dp_bridge_detect(dp); + mutex_unlock(&dp->lock); + drm_bridge_hpd_notify(&dp->bridge, status); } =20 --=20 2.35.1.1320.gc452695387.dirty