From patchwork Mon Jul 31 08:29:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jai Luthra X-Patchwork-Id: 709950 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9EFB3C001DE for ; Mon, 31 Jul 2023 08:30:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231484AbjGaIaE (ORCPT ); Mon, 31 Jul 2023 04:30:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230272AbjGaI34 (ORCPT ); Mon, 31 Jul 2023 04:29:56 -0400 Received: from fllv0015.ext.ti.com (fllv0015.ext.ti.com [198.47.19.141]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07BDF18C; Mon, 31 Jul 2023 01:29:54 -0700 (PDT) Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 36V8TkaN054942; Mon, 31 Jul 2023 03:29:46 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1690792186; bh=dKmMEpqsVJQCvV6Lp8DGVqTPdKyQoRAETp9L6a97G68=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=LkR2METcX3SYvaFJHj8dsj6i6n/p241ccTOgSV4G3UZngKlpPCJ+b0IUUN1wiGOZA +d5k2Wutngp0+0r8lhM3c36FGEa9XjP0quvBhP/i4in0Si35Sz4edq8qC9f1qj+k+o g1KPLt/Fuxiog9GCPGhajb6Vft8UYZn08JPlB85Y= Received: from DFLE104.ent.ti.com (dfle104.ent.ti.com [10.64.6.25]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 36V8TkSW106720 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 31 Jul 2023 03:29:46 -0500 Received: from DFLE112.ent.ti.com (10.64.6.33) by DFLE104.ent.ti.com (10.64.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Mon, 31 Jul 2023 03:29:45 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DFLE112.ent.ti.com (10.64.6.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Mon, 31 Jul 2023 03:29:45 -0500 Received: from localhost (ileaxei01-snat.itg.ti.com [10.180.69.5]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 36V8TjWa041939; Mon, 31 Jul 2023 03:29:45 -0500 From: Jai Luthra To: Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sakari Ailus , Laurent Pinchart , Tomi Valkeinen CC: , , , , Mauro Carvalho Chehab , Maxime Ripard , , Benoit Parrot , Vaishnav Achath , Vignesh Raghavendra , , , Subject: [PATCH v8 09/16] media: cadence: csi2rx: Soft reset the streams before starting capture Date: Mon, 31 Jul 2023 13:59:27 +0530 Message-ID: <20230731-upstream_csi-v8-9-fb7d3661c2c9@ti.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230731-upstream_csi-v8-0-fb7d3661c2c9@ti.com> References: <20230731-upstream_csi-v8-0-fb7d3661c2c9@ti.com> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1797; i=j-luthra@ti.com; h=from:subject:message-id; bh=Jr1HqoB3E2drdTZLT7y6JgE0f/Pnt2n1lScYOS5wBxs=; b=owEBbQKS/ZANAwAIAUPekfkkmnFFAcsmYgBkx2xqE2Q0tImNDFK01hdkztRVJ/xOXdVJIENUI a7LnemX9XaJAjMEAAEIAB0WIQRN4NgY5dV16NRar8VD3pH5JJpxRQUCZMdsagAKCRBD3pH5JJpx RUwYD/48JrxUM6k4+45cOnMsAhXH1ynSFA8gSIxlntBL0735llyo+ivOH7GmwsictV3p0CdvK90 xLqmVsVBghwBpZwMwP3+nwKtvaHnk0l0haeKOeR7wXIg/Vi04LQ19oAL8cqI305kVPzfxi0FUMB RsCB6b8FlpIqjpw2ymokGnRn7R+UuEjSpLbDNZ5diEK/bnR8GTO6jCPl/GXhVky7AFztmTAHsM6 PIhmdWuOe2cXorty6N4xtPXsgZqq3uZrJ3cWxzq5ZM4Q5lmLlXi+MarImmUxlphj40g0Z2W53Wz 6Vo2QLT7XV6+Ut2I+bgzMbZcuJBeFz3dRC+C9kSbhnuma7XbukhjXhLli/gO9MXL1daxbuil9sp 9IV3c5MsexufIqfHljIp5hdnFS4KPWM4qBGVMsWPoPpDZ2rKE5fit17QC+9i6+r6mIR4iEQgUPj lqBRougxxOyuLtSbdPPlsdg6znH6PKzBnH6BMqSEWXCbVQKXYzVUZRe1LcfOD7m6Ke7IEJNTQhR 4e3kkweTBMifA73LSMWYrdHlPXFZ48KZ+Z66ThG7Vlm2BZbQUwrKmiMP/mpYdLhlo1P12GIebdV tMemelH2tZM+vg7Q5RrKeD/v1bSoeUk3jzLHZ0XR87PEnzB6HmVVGGdxY44VrEdtUCpcBL02mcd +xu74RUmtuSoaig== X-Developer-Key: i=j-luthra@ti.com; a=openpgp; fpr=4DE0D818E5D575E8D45AAFC543DE91F9249A7145 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org From: Pratyush Yadav This resets the stream state machines and FIFOs, giving them a clean slate. On J721E if the streams are not reset before starting the capture, the captured frame gets wrapped around vertically on every run after the first. Signed-off-by: Pratyush Yadav Signed-off-by: Jai Luthra Reviewed-by: Laurent Pinchart --- v7->v8: No change drivers/media/platform/cadence/cdns-csi2rx.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c index 2a80c66fb547..30cdc260b46a 100644 --- a/drivers/media/platform/cadence/cdns-csi2rx.c +++ b/drivers/media/platform/cadence/cdns-csi2rx.c @@ -40,6 +40,7 @@ #define CSI2RX_STREAM_BASE(n) (((n) + 1) * 0x100) #define CSI2RX_STREAM_CTRL_REG(n) (CSI2RX_STREAM_BASE(n) + 0x000) +#define CSI2RX_STREAM_CTRL_SOFT_RST BIT(4) #define CSI2RX_STREAM_CTRL_START BIT(0) #define CSI2RX_STREAM_DATA_CFG_REG(n) (CSI2RX_STREAM_BASE(n) + 0x008) @@ -138,12 +139,22 @@ struct csi2rx_priv *v4l2_subdev_to_csi2rx(struct v4l2_subdev *subdev) static void csi2rx_reset(struct csi2rx_priv *csi2rx) { + unsigned int i; + writel(CSI2RX_SOFT_RESET_PROTOCOL | CSI2RX_SOFT_RESET_FRONT, csi2rx->base + CSI2RX_SOFT_RESET_REG); udelay(10); writel(0, csi2rx->base + CSI2RX_SOFT_RESET_REG); + + /* Reset individual streams. */ + for (i = 0; i < csi2rx->max_streams; i++) { + writel(CSI2RX_STREAM_CTRL_SOFT_RST, + csi2rx->base + CSI2RX_STREAM_CTRL_REG(i)); + usleep_range(10, 20); + writel(0, csi2rx->base + CSI2RX_STREAM_CTRL_REG(i)); + } } static int csi2rx_configure_ext_dphy(struct csi2rx_priv *csi2rx)