From patchwork Wed Sep 15 12:02:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 512596 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=unavailable 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 EC1D3C433FE for ; Wed, 15 Sep 2021 12:03:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D41EF61247 for ; Wed, 15 Sep 2021 12:03:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237805AbhIOMEj (ORCPT ); Wed, 15 Sep 2021 08:04:39 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:55208 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237741AbhIOMEe (ORCPT ); Wed, 15 Sep 2021 08:04:34 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 18FC36p1085464; Wed, 15 Sep 2021 07:03:06 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1631707386; bh=1EbfquFBKlFE7F+bpSOI+/LXMEkFHo8R0YoztebJ0/Q=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=TAgSH8GD9LQDejUi3BP3R7/fPQc8anW1UMdZSt6Lts034I//C38B84GMcsxEYEyUM FdEWL31uVkQP+OqK5MYwYcGt8Bphhdgm6nx4zi8SCJMaPUInF135g6OxAGq1Vibil0 HcjFsxPcy1LpNgAiqWDC9Z98vGBmnI94rrpkEUIo= Received: from DLEE109.ent.ti.com (dlee109.ent.ti.com [157.170.170.41]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 18FC36Br121053 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 15 Sep 2021 07:03:06 -0500 Received: from DLEE113.ent.ti.com (157.170.170.24) by DLEE109.ent.ti.com (157.170.170.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Wed, 15 Sep 2021 07:03:06 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) 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 15.1.2308.14 via Frontend Transport; Wed, 15 Sep 2021 07:03:06 -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 18FC2fD6019246; Wed, 15 Sep 2021 07:03:02 -0500 From: Pratyush Yadav To: Mauro Carvalho Chehab CC: Pratyush Yadav , Laurent Pinchart , Nikhil Devshatwar , Tomi Valkeinen , Vignesh Raghavendra , Benoit Parrot , Maxime Ripard , Rob Herring , Sakari Ailus , =?utf-8?q?Niklas_S=C3=B6derlund?= , , , Subject: [PATCH v4 05/11] media: cadence: csi2rx: Fix stream data configuration Date: Wed, 15 Sep 2021 17:32:34 +0530 Message-ID: <20210915120240.21572-6-p.yadav@ti.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210915120240.21572-1-p.yadav@ti.com> References: <20210915120240.21572-1-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 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 --- (no changes since v1) 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 3730e8beee48..edd56c5f2e89 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) @@ -286,8 +285,11 @@ 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,