From patchwork Mon Nov 18 15:14:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jani Nikula X-Patchwork-Id: 13878766 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 152E5D49232 for ; Mon, 18 Nov 2024 15:15:22 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9480F10E511; Mon, 18 Nov 2024 15:15:21 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="bwtR0dM6"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.14]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0D9A310E4F8; Mon, 18 Nov 2024 15:15:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1731942918; x=1763478918; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ysZ2rAgNl94Jr8/IgUF/XGU6I1i4iCrbTSjsYJD+Qi0=; b=bwtR0dM6pdIMnBlqFUDTvrUnORqIAnXBPe6Eagr1HIZFeQgD9raXBWwD j4JG1U7LDCUEwfb/4bvZUyBaJXEsdAPTk2mFqd8rRG2cS7MLlLHNwCVpN 8HoehX9BQATTzwAvuxtqhayq8Wps6ftPnZ/j2b0d+ugbxBldpCtp+qmaU loO59TPfbs7LsP/a+/N/oDcSVIEfLtPS18HZ1bPlOUDuTliQ1P6UZ2/Wp WKWw6Sw2vsU7ROL1mZORhWBt4ZmUcG8yg48kalZZL3Iv24mjiMsA+Ufd5 4hp9zIUsLbP4+6UlGjr+VXiXztxTWrnTtpVHEq1wo7/xljZRAnILUwZ7Q w==; X-CSE-ConnectionGUID: rhjuM5GuSO+xuY1OLaWkyw== X-CSE-MsgGUID: pYiquwUpRgyHrgMRa3JmDQ== X-IronPort-AV: E=McAfee;i="6700,10204,11260"; a="32139270" X-IronPort-AV: E=Sophos;i="6.12,164,1728975600"; d="scan'208";a="32139270" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Nov 2024 07:15:18 -0800 X-CSE-ConnectionGUID: c0RjT5s2TH6BlJ6CXcg9kQ== X-CSE-MsgGUID: P4+fSoafRDOnx+fSb+0m6A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,164,1728975600"; d="scan'208";a="89040868" Received: from jkrzyszt-mobl2.ger.corp.intel.com (HELO localhost) ([10.245.246.148]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Nov 2024 07:15:16 -0800 From: Jani Nikula To: dri-devel@lists.freedesktop.org Cc: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, jani.nikula@intel.com, imre.deak@intel.com Subject: [PATCH 3/3] drm/dp: extract drm_dp_dpcd_clear_payload() Date: Mon, 18 Nov 2024 17:14:54 +0200 Message-Id: X-Mailer: git-send-email 2.39.5 In-Reply-To: References: MIME-Version: 1.0 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo 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" SST with 128b/132b channel coding needs this too. Extract to a separate helper, independent of MST. Signed-off-by: Jani Nikula Reviewed-by: Imre Deak --- drivers/gpu/drm/display/drm_dp_helper.c | 14 ++++++++++++++ drivers/gpu/drm/display/drm_dp_mst_topology.c | 2 +- include/drm/display/drm_dp_helper.h | 1 + 3 files changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index 0c9230f3f994..9b7f8393440d 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -848,6 +848,20 @@ int drm_dp_dpcd_write_payload(struct drm_dp_aux *aux, } EXPORT_SYMBOL(drm_dp_dpcd_write_payload); +/** + * drm_dp_dpcd_clear_payload() - Clear the entire VC Payload ID table + * @aux: DisplayPort AUX channel + * + * Clear the entire VC Payload ID table. + * + * Returns: 0 on success, negative error code on errors. + */ +int drm_dp_dpcd_clear_payload(struct drm_dp_aux *aux) +{ + return drm_dp_dpcd_write_payload(aux, 0, 0, 0x3f); +} +EXPORT_SYMBOL(drm_dp_dpcd_clear_payload); + /** * drm_dp_dpcd_poll_act_handled() - Polls for ACT handled status. * @aux: DisplayPort AUX channel diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c index a426d13a7a36..307ce0981e2c 100644 --- a/drivers/gpu/drm/display/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c @@ -3679,7 +3679,7 @@ int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool ms goto out_unlock; /* Write reset payload */ - drm_dp_dpcd_write_payload(mgr->aux, 0, 0, 0x3f); + drm_dp_dpcd_clear_payload(mgr->aux); drm_dp_mst_queue_probe_work(mgr); diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h index 69793815aa82..8f4054a56039 100644 --- a/include/drm/display/drm_dp_helper.h +++ b/include/drm/display/drm_dp_helper.h @@ -569,6 +569,7 @@ int drm_dp_dpcd_read_phy_link_status(struct drm_dp_aux *aux, int drm_dp_dpcd_write_payload(struct drm_dp_aux *aux, int vcpid, u8 start_time_slot, u8 time_slot_count); +int drm_dp_dpcd_clear_payload(struct drm_dp_aux *aux); int drm_dp_dpcd_poll_act_handled(struct drm_dp_aux *aux, int timeout_ms); bool drm_dp_send_real_edid_checksum(struct drm_dp_aux *aux,