From patchwork Thu Jun 24 19:21:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 12343065 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 444DFC49EA6 for ; Thu, 24 Jun 2021 19:22:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 21B3D610C7 for ; Thu, 24 Jun 2021 19:22:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232823AbhFXTYy (ORCPT ); Thu, 24 Jun 2021 15:24:54 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:51336 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232818AbhFXTYw (ORCPT ); Thu, 24 Jun 2021 15:24:52 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 15OJMUWZ043461; Thu, 24 Jun 2021 14:22:30 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1624562550; bh=5vgH9+Q5dkeV+iA2ccYP34gskHwhoifbJxU7sUk2f+I=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=eAKhVrp1sNgUpVsoPqIJ6usQ5qW1mTl8V2msNG9DKhm1vQaj8ryX4woIxZCoRODFD loNNfsc/DZ2jvAFnf2vgS3iITtumNTcH8Gnby4D1WANZ397buMhJ0j7mvhBTWoW4tN YhnmwSb+U+ZgsK8o1OvQ66H9PMydwIrAz6zvhEZU= Received: from DLEE103.ent.ti.com (dlee103.ent.ti.com [157.170.170.33]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 15OJMUBp086126 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 24 Jun 2021 14:22:30 -0500 Received: from DLEE115.ent.ti.com (157.170.170.26) by DLEE103.ent.ti.com (157.170.170.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Thu, 24 Jun 2021 14:22:30 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Thu, 24 Jun 2021 14:22:30 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 15OJM14L120548; Thu, 24 Jun 2021 14:22:28 -0500 From: Pratyush Yadav To: Mauro Carvalho Chehab CC: Laurent Pinchart , Vignesh Raghavendra , Tomi Valkeinen , Nikhil Devshatwar , Pratyush Yadav , Maxime Ripard , , Subject: [PATCH v3 05/11] media: cadence: csi2rx: Set the STOP bit when stopping a stream Date: Fri, 25 Jun 2021 00:51:54 +0530 Message-ID: <20210624192200.22559-6-p.yadav@ti.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210624192200.22559-1-p.yadav@ti.com> References: <20210624192200.22559-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The stream stop procedure says that the STOP bit should be set when the stream is to be stopped, and then the ready bit in stream status register polled to make sure the STOP operation is finished. Signed-off-by: Pratyush Yadav --- (no changes since v1) drivers/media/platform/cadence/cdns-csi2rx.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c index 379bc163d4c1..34d4829a0d87 100644 --- a/drivers/media/platform/cadence/cdns-csi2rx.c +++ b/drivers/media/platform/cadence/cdns-csi2rx.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -40,8 +41,12 @@ #define CSI2RX_STREAM_CTRL_REG(n) (CSI2RX_STREAM_BASE(n) + 0x000) #define CSI2RX_STREAM_CTRL_SOFT_RST BIT(4) +#define CSI2RX_STREAM_CTRL_STOP BIT(1) #define CSI2RX_STREAM_CTRL_START BIT(0) +#define CSI2RX_STREAM_STATUS_REG(n) (CSI2RX_STREAM_BASE(n) + 0x004) +#define CSI2RX_STREAM_STATUS_RDY BIT(31) + #define CSI2RX_STREAM_DATA_CFG_REG(n) (CSI2RX_STREAM_BASE(n) + 0x008) #define CSI2RX_STREAM_DATA_CFG_EN_VC_SELECT BIT(31) #define CSI2RX_STREAM_DATA_CFG_VC_SELECT(n) BIT((n) + 16) @@ -326,12 +331,23 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx) static void csi2rx_stop(struct csi2rx_priv *csi2rx) { unsigned int i; + u32 val; + int ret; clk_prepare_enable(csi2rx->p_clk); clk_disable_unprepare(csi2rx->sys_clk); for (i = 0; i < csi2rx->max_streams; i++) { - writel(0, csi2rx->base + CSI2RX_STREAM_CTRL_REG(i)); + writel(CSI2RX_STREAM_CTRL_STOP, + csi2rx->base + CSI2RX_STREAM_CTRL_REG(i)); + + ret = readl_relaxed_poll_timeout(csi2rx->base + + CSI2RX_STREAM_STATUS_REG(i), + val, + (val & CSI2RX_STREAM_STATUS_RDY), + 10, 10000); + if (ret) + dev_warn(csi2rx->dev, "Failed to stop stream%d\n", i); clk_disable_unprepare(csi2rx->pixel_clk[i]); }