From patchwork Tue Mar 12 07:35:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Lin X-Patchwork-Id: 10848655 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 539241390 for ; Tue, 12 Mar 2019 07:36:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3E908293A8 for ; Tue, 12 Mar 2019 07:36:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 320DD293DA; Tue, 12 Mar 2019 07:36:52 +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=-6.4 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI,RCVD_IN_SORBS_WEB 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 CD98D293A8 for ; Tue, 12 Mar 2019 07:36:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726614AbfCLHgv (ORCPT ); Tue, 12 Mar 2019 03:36:51 -0400 Received: from lucky1.263xmail.com ([211.157.147.132]:41290 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726518AbfCLHgu (ORCPT ); Tue, 12 Mar 2019 03:36:50 -0400 Received: from shawn.lin?rock-chips.com (unknown [192.168.167.236]) by lucky1.263xmail.com (Postfix) with ESMTP id BEC004EF3; Tue, 12 Mar 2019 15:36:47 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 X-KSVirus-check: 0 X-ABS-CHECKED: 4 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P28493T139857189914368S1552376204389803_; Tue, 12 Mar 2019 15:36:46 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <9ee9fdee1ae8702c6bd213b35013407b> X-RL-SENDER: shawn.lin@rock-chips.com X-SENDER: lintao@rock-chips.com X-LOGIN-NAME: shawn.lin@rock-chips.com X-FST-TO: jh80.chung@samsung.com X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 From: Shawn Lin To: Jaehoon Chung , Ulf Hansson Cc: linux-mmc@vger.kernel.org, linux-rockchip@lists.infradead.org, Douglas Anderson , Shawn Lin Subject: [PATCH v2 0/3] Add hardware unbusy interrupt support for dw_mmc Date: Tue, 12 Mar 2019 15:35:06 +0800 Message-Id: <1552376109-126335-1-git-send-email-shawn.lin@rock-chips.com> X-Mailer: git-send-email 1.9.1 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP DesignWare MMC controler lacks proper hardware wait busy support, so the software must check the busy state if the following tranfser need use data line. And dw_mci_wait_while_busy() now use busy check mostly with host's lock hold, and we can't relinguish CPU at this moment, which makes it rather painful when used in low-end platform. To solve this, Rockchip invent a new hardware unbusy interrupt module, which could generate interrupt if the state machine runs from busy state into idle state. Changes in v2: - add tag from Ziyuan Xu - remove lock for checking event since it's already atomic operation Shawn Lin (3): mmc: dw_mmc: Check busy state in dw_mci_request() mmc: dw_mmc: Add hardware unbusy interrupt support mmc: dw_mmc-rockchip: Enable hardware unbusy interrupt support drivers/mmc/host/dw_mmc-rockchip.c | 30 ++++++++++++++++++++ drivers/mmc/host/dw_mmc.c | 56 +++++++++++++++++++++++++++++++++++++- drivers/mmc/host/dw_mmc.h | 6 ++++ 3 files changed, 91 insertions(+), 1 deletion(-)