From patchwork Wed Apr 29 16:47:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 11517907 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4CD3D15E6 for ; Wed, 29 Apr 2020 16:47:59 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2B85B208FE for ; Wed, 29 Apr 2020 16:47:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="bwAOX3Pk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2B85B208FE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=RGfu33MAPD5baHXWLlTPcLmbha0HQBoel04eQNEsv5o=; b=bwAOX3Pkp39ojk U+a5pTYwztxDeUbs6VvbyD1h2KYkPkj9/pFUyOHKQP3ic/7Jma3zEhk+/pDD0GkO1bW0msNt4nv1N 5aH8goDLAvuOAs8HZRFudvqKeJAYQ4wsHc5xjpK/3TxBiO+hmeL1337MuNQP3LfdR9kPPTq6ojGp9 qKyzMkmA7f2jyPFeu5I22C18wsQT8b8iFd6CLOxEmlU0Az902qA6tfVNl1yADyxpPwEkFu+Rdpeoo br/2+rgac9i7UzAxHRXGxBmZ/GHYj6rgN3zgy/nmDm3yiS37b5On9nqQ1akTMoDcVoylugwgYBd6I Fm9yjZ2VLcYphnYckZgQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTpsK-0007Rp-02; Wed, 29 Apr 2020 16:47:56 +0000 Received: from mx2.suse.de ([195.135.220.15]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTpsG-0007PH-9D; Wed, 29 Apr 2020 16:47:53 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id BB954AD49; Wed, 29 Apr 2020 16:47:47 +0000 (UTC) From: Nicolas Saenz Julienne To: f.fainelli@gmail.com, gregkh@linuxfoundation.org, helgaas@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v7 0/4] USB: pci-quirks: Add Raspberry Pi 4 quirk Date: Wed, 29 Apr 2020 18:47:30 +0200 Message-Id: <20200429164734.21506-1-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200429_094752_468254_23FB40FF X-CRM114-Status: GOOD ( 14.69 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [195.135.220.15 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [195.135.220.15 listed in wl.mailspike.net] 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Herring , tim.gover@raspberrypi.org, linux-pci@vger.kernel.org, linux-usb@vger.kernel.org, Nicolas Saenz Julienne , bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, wahrenst@gmx.net Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org On the Raspberry Pi 4, after a PCI reset, VL805's firmware may either be loaded directly from an EEPROM or, if not present, by the SoC's co-processor, VideoCore. This series adds support for the later. Note that there are a set of constraints we have to consider (some of them I missed on v1): - We need to make sure the VideoCore firmware interface is up and running before running the VL805 firmware load call. - There is no way to discern RPi4's VL805 chip from other platforms', so we need the firmware load to happen *before* running quirk_usb_handoff_xhci(). Failure to do so results in an unwarranted 5 second wait while the fixup code polls xHC's unexisting state. By Florian's suggestion I've been spending some time exploring the device link[1] API in order to see if that could save us from explicitly creating probe dependencies between pcie-brcmstb and firmware/raspberrypi (patch #3). Technically these dependencies could be inferred from DT. It turns out Saravana Kannan has been looking at this already. A new boot mechanism, activated with fw_devlink=on takes care of the device probe ordering on devices with consumer/supplier relationships. For now this relationship is created based on the usage of generic DT properties, but has no support for vendor-specifc DT properties, which we'd be forced to use in order to create a relationship between our two devices since our setup is highly non generic. There will probably be at some point support for such properties, and we will then be able to revisit some of this code. All this is based on the work by Tim Gover in RPi's downstream kernel[2]. [1] https://www.kernel.org/doc/html/v4.13/driver-api/device_link.html [2] https://github.com/raspberrypi/linux/commit/9935b4c7e360b4494b4cb6e3ce797238a1ab78bd --- Changes since v6: - Make rpi_firmware_init_vl805() more robust - Rewrite comments and patch descriptions to be more accessible to non RPi fluent people - Removed Florian's Reviewed-by in patch #2 as function changed substantially - Tested with/witout u-boot Changes since v5: - Fix issues reported by Kbuild test robot Changes since v4: - Addressed Sergei's comments - Fix potential warning in patch #2 Changes since v3: - Addressed Greg's comments There was no v2, my bad. Changes since v1: - Addressed Floarians comments Nicolas Saenz Julienne (4): soc: bcm2835: Add notify xHCI reset property firmware: raspberrypi: Introduce vl805 init routine PCI: brcmstb: Wait for Raspberry Pi's firmware when present USB: pci-quirks: Add Raspberry Pi 4 quirk drivers/firmware/Kconfig | 3 +- drivers/firmware/raspberrypi.c | 52 ++++++++++++++++++++++ drivers/pci/controller/pcie-brcmstb.c | 17 +++++++ drivers/usb/host/pci-quirks.c | 16 +++++++ include/soc/bcm2835/raspberrypi-firmware.h | 9 +++- 5 files changed, 95 insertions(+), 2 deletions(-)