From patchwork Tue Mar 30 17:33:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 411845 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=-18.8 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 47406C433EA for ; Tue, 30 Mar 2021 17:35:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0799760235 for ; Tue, 30 Mar 2021 17:35:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232558AbhC3RfR (ORCPT ); Tue, 30 Mar 2021 13:35:17 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:53224 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232532AbhC3RfE (ORCPT ); Tue, 30 Mar 2021 13:35:04 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 12UHYkW8080852; Tue, 30 Mar 2021 12:34:46 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1617125686; bh=nFwFKwKkm2Tg7mXODMtl1Qe24xGGc90Y5vckjfrUM3U=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=KhFXzFRXlc9hm2zgNKhDPSATD6M36w3Tw5uKUDqwCEwen3r5TN25+K0Wfg+unFRHt nJHKE2+HCRYvD6MvL8hy8kE6fnPdFXGFHH6YT0ahOaNEGMSGTZDXy+G46y/iHNIcyz okUWWe5uNkl0WNMsHr+GJnAaGdcJLnwow0CUckM8= Received: from DLEE113.ent.ti.com (dlee113.ent.ti.com [157.170.170.24]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 12UHYkjW026148 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 30 Mar 2021 12:34:46 -0500 Received: from DLEE107.ent.ti.com (157.170.170.37) by DLEE113.ent.ti.com (157.170.170.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Tue, 30 Mar 2021 12:34:46 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE107.ent.ti.com (157.170.170.37) 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; Tue, 30 Mar 2021 12:34:46 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 12UHXmgp125244; Tue, 30 Mar 2021 12:34:40 -0500 From: Pratyush Yadav To: Mauro Carvalho Chehab , Rob Herring , Kishon Vijay Abraham I , Vinod Koul , Peter Ujfalusi , Maxime Ripard , Benoit Parrot , Hans Verkuil , Alexandre Courbot , Laurent Pinchart , Stanimir Varbanov , Helen Koike , Michael Tretter , Peter Chen , Chunfeng Yun , , , , , CC: Pratyush Yadav , Vignesh Raghavendra , Tomi Valkeinen Subject: [PATCH 08/16] media: cadence: csi2rx: Fix stream data configuration Date: Tue, 30 Mar 2021 23:03:40 +0530 Message-ID: <20210330173348.30135-9-p.yadav@ti.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210330173348.30135-1-p.yadav@ti.com> References: <20210330173348.30135-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Firstly, there is no VC_EN bit present in the STREAM_DATA_CFG register. Bit 31 is part of the VL_SELECT field. Remove it completely. Secondly, it makes little sense to enable ith virtual channel for ith stream. Sure, there might be a use-case that demands it. But there might also be a use case that demands all streams to use the 0th virtual channel. Prefer this case over the former because it is less arbitrary and also makes it very clear what the limitations of the current driver is instead of giving a false impression that multiple virtual channels are supported. Signed-off-by: Pratyush Yadav --- drivers/media/platform/cadence/cdns-csi2rx.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c index eca65b157f59..7d1ac51e0698 100644 --- a/drivers/media/platform/cadence/cdns-csi2rx.c +++ b/drivers/media/platform/cadence/cdns-csi2rx.c @@ -48,7 +48,6 @@ #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) #define CSI2RX_STREAM_CFG_REG(n) (CSI2RX_STREAM_BASE(n) + 0x00c) @@ -290,8 +289,11 @@ static int csi2rx_start(struct csi2rx_priv *csi2rx) writel(CSI2RX_STREAM_CFG_FIFO_MODE_LARGE_BUF, csi2rx->base + CSI2RX_STREAM_CFG_REG(i)); - writel(CSI2RX_STREAM_DATA_CFG_EN_VC_SELECT | - CSI2RX_STREAM_DATA_CFG_VC_SELECT(i), + /* + * Enable one virtual channel. When multiple virtual channels + * are supported this will have to be changed. + */ + writel(CSI2RX_STREAM_DATA_CFG_VC_SELECT(0), csi2rx->base + CSI2RX_STREAM_DATA_CFG_REG(i)); writel(CSI2RX_STREAM_CTRL_START,