From patchwork Fri Mar 15 16:57:48 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heikki Krogerus X-Patchwork-Id: 10855261 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 91E9A6C2 for ; Fri, 15 Mar 2019 16:58:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 783CB2AB3A for ; Fri, 15 Mar 2019 16:58:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6C33F2AB3F; Fri, 15 Mar 2019 16:58:04 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 007212AB3A for ; Fri, 15 Mar 2019 16:58:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729450AbfCOQ6D (ORCPT ); Fri, 15 Mar 2019 12:58:03 -0400 Received: from mga17.intel.com ([192.55.52.151]:39353 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728458AbfCOQ6D (ORCPT ); Fri, 15 Mar 2019 12:58:03 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Mar 2019 09:58:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,482,1544515200"; d="scan'208";a="155397152" Received: from black.fi.intel.com (HELO black.fi.intel.com.) ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 15 Mar 2019 09:58:00 -0700 From: Heikki Krogerus To: Hans de Goede Cc: Andy Shevchenko , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, platform-driver-x86@vger.kernel.org Subject: [RFC PATCH 00/12] platform/x86: intel_cht_int33fe: Real DisplayPort reference Date: Fri, 15 Mar 2019 19:57:48 +0300 Message-Id: <20190315165800.5058-1-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: platform-driver-x86-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Hi Hans, This is RFC, so not CCing everybody who should be CCd yet. I spend a bit of time on thinking how could we use real fwnode references instead of that string you proposed in order to hook up the USB Type-C connector with the DisplayPort connector. This is what I came up with. I was planning on introducing the references to software nodes in any case like I mentioned before. I'm not yet adding any sub-nodes for the DP alt mode. I'm just assigning references to all the relevant components (nodes) for the USB Type-C connector node. I think that the reference to the DisplayPort should be assigned to the USB Type-C connector and not to the alt mode sub-node. Using these you should be able to add that notifier, and in it just get the reference to the correct DisplayPort node from the USB Type-C connector, and then you can simply walk through the drm_connectors and match using the fwnode. thanks, Heikki Krogerus (12): software node: Prevent potential NULL Pointer Dereference software node: Increment parent node's ref count software node: Add support for references software node: Implement .get_reference_args fwnode operation ACPI / property: Don't limit named child node matching to data nodes device connection: Find connections also by checking the references platform/x86: intel_cht_int33fe: Provide software node for all components platform/x86: intel_cht_int33fe: Provide fwnode for the USB connector platform/x86: intel_cht_int33fe: Link with external dependencies using fwnodes platform/x86: intel_cht_int33fe: Replacing the old connections with references drm: Add fwnode member to the struct drm_connector drm/i915: Associate the ACPI connector nodes with connector entries drivers/acpi/property.c | 26 +- drivers/base/devcon.c | 28 ++ drivers/base/swnode.c | 165 ++++++++++- drivers/gpu/drm/drm_sysfs.c | 49 +++- drivers/gpu/drm/i915/intel_display.c | 41 +++ drivers/platform/x86/intel_cht_int33fe.c | 349 ++++++++++++++++++++--- include/drm/drm_connector.h | 2 + include/linux/property.h | 8 + 8 files changed, 599 insertions(+), 69 deletions(-)