From patchwork Wed Mar 20 20:11:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Imre Deak X-Patchwork-Id: 13598155 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 9F674C6FD1F for ; Wed, 20 Mar 2024 20:11:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DB83910F58A; Wed, 20 Mar 2024 20:11:38 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Uj3S9lnx"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) by gabe.freedesktop.org (Postfix) with ESMTPS id A04AA10E6D9; Wed, 20 Mar 2024 20:11:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1710965493; x=1742501493; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DmggUTF2ymA+MnUG35CLxTBhJVrdVFJDrR4vmN0IyCw=; b=Uj3S9lnxSsc+zTaQM0PlOdxnuVfLocjzMrHvsGtNLhBy30x/RsOdWo8e bn9m4HRLMLSPaHGvM11nnxZMLEIeB8z1/bNrvVSW2yM3oTH7ZeRtpDrRo RpnIpxQHGB2f9j95aMj/VY56eM7aNjwD3rdVRU1Lpiy0xsTuS/uRpMwIn kOKTP+yL/6eHaSh2ll3AECzHt8sPRO3V8fzEpH9TSYxRGVgIuYF79kTtL wTgIzFk88sncPYvIQ8jmohxMpWtYsyCIBxGFWAAXLs5wvCMb6zZx/GjGX 3050IQzt/9QlZgyLfZnpaEzYvh4Vaw94cgCg2JjFoH06rDfjCIwq5t9Y4 g==; X-IronPort-AV: E=McAfee;i="6600,9927,11019"; a="31352346" X-IronPort-AV: E=Sophos;i="6.07,141,1708416000"; d="scan'208";a="31352346" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Mar 2024 13:11:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,141,1708416000"; d="scan'208";a="14246526" Received: from ideak-desk.fi.intel.com ([10.237.72.78]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Mar 2024 13:11:32 -0700 From: Imre Deak To: intel-gfx@lists.freedesktop.org Cc: Lyude Paul , dri-devel@lists.freedesktop.org Subject: [PATCH 09/11] drm/dp_mst: Add drm_dp_mst_aux_for_parent() Date: Wed, 20 Mar 2024 22:11:49 +0200 Message-ID: <20240320201152.3487892-10-imre.deak@intel.com> X-Mailer: git-send-email 2.43.3 In-Reply-To: <20240320201152.3487892-1-imre.deak@intel.com> References: <20240320201152.3487892-1-imre.deak@intel.com> MIME-Version: 1.0 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add a function to get the AUX device of the parent of an MST port, used by a follow-up i915 patch in the patchset. Cc: Lyude Paul Cc: dri-devel@lists.freedesktop.org Signed-off-by: Imre Deak Reviewed-by: Ankit Nautiyal --- drivers/gpu/drm/display/drm_dp_mst_topology.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c index 6bd471a2266ce..d70f7de644371 100644 --- a/drivers/gpu/drm/display/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c @@ -6004,6 +6004,22 @@ static bool drm_dp_mst_is_virtual_dpcd(struct drm_dp_mst_port *port) return false; } +/** + * drm_dp_mst_aux_for_parent() - Get the AUX device for an MST port's parent + * @port: MST port whose parent's AUX device is returned + * + * Return the AUX device for @port's parent or NULL if port's parent is the + * root port. + */ +struct drm_dp_aux *drm_dp_mst_aux_for_parent(struct drm_dp_mst_port *port) +{ + if (!port->parent || !port->parent->port_parent) + return NULL; + + return &port->parent->port_parent->aux; +} +EXPORT_SYMBOL(drm_dp_mst_aux_for_parent); + /** * drm_dp_mst_dsc_aux_for_port() - Find the correct aux for DSC * @port: The port to check. A leaf of the MST tree with an attached display.