From mboxrd@z Thu Jan 1 00:00:00 1970 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 856ADFB3D17 for ; Mon, 30 Mar 2026 10:45:05 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BF59E10E5A6; Mon, 30 Mar 2026 10:45:04 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="R81O35q2"; dkim-atps=neutral Received: from mail-wm1-f51.google.com (mail-wm1-f51.google.com [209.85.128.51]) by gabe.freedesktop.org (Postfix) with ESMTPS id A561910E1C8 for ; Mon, 30 Mar 2026 10:44:55 +0000 (UTC) Received: by mail-wm1-f51.google.com with SMTP id 5b1f17b1804b1-486fd3a577eso38436135e9.1 for ; Mon, 30 Mar 2026 03:44:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1774867494; x=1775472294; darn=lists.freedesktop.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=3uX914YhuYkTgoe0kk9VM5sxxzK+tc1qOdfmAktq/XU=; b=R81O35q2/AeOMn/39SSX+yyV16NRJUacAKUYBXVKDCFxMKyAum5C+X5eS1Gikj/chn BxxIgalmTTccLv0YmQf7EhQc+zs9oGEHS2jb9j5PuobCSNmBYo/WEN7cqHiBDaLEkedE 8qBBATauvkakmyCOUmo73DthzoAdEJ4XGD8K9qmaXdpKGETCTlGtcUcJNVT/Fk4OdkWw R49P2Uhr1dqwFcGYT3T/vihKp9Vm3SI4WhOsUZSXCWYpZn1UyPlcZ77OCI8Z3Gw4kFyx NwO9qlsAz9j/If498sA420qrAVQ11dpUkU6n8EVXjQik31BdH97Ez8AhQR+s+po9A1oS bbdQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774867494; x=1775472294; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=3uX914YhuYkTgoe0kk9VM5sxxzK+tc1qOdfmAktq/XU=; b=i/bgzqDlifZzVKSTvYTtul9I63yNzSU6T1GlyeuzL15hQSK5gm4YzF096ZAXu6xatV 8Ryh91T5wZaD+YImLTAZZbkGqCKr5F1BbCQQsX6EGSdpaL+RuH4iZRzaao0JKzDc3cwG ebinyx1Adefg/3y1LZcfh1+3leboq39PiicKY7YyF/SHi6QEwQgRmH2I+Lbt4jNhjS/h EABNfpQ99RCnkxtGdKtB3xQLbMJHEzCRQyh2HsrWgSNMSUuAR/mN0WWzX4TPlr/kra9r vukaogmNyl9Oft2muo4xcccfRPYH+cQaJlHLYU5Snz6TvGlzhofGdbTWSTilg2P6oWtZ uvTg== X-Forwarded-Encrypted: i=1; AJvYcCU89W7CSdh5K6SGswcTJqweaGoRMF7Oi1iD8eB6polHbihbIvplOyts22HiecGCWHyuiXqvlaAkq54=@lists.freedesktop.org X-Gm-Message-State: AOJu0Ywk4v8A6LB9ma7hlVUkd7TgtqZXb93xRd/0tXZFNi8zHMezu3s3 1klvH5ZDAVk2uCqR9l/UXnfEtnguD1NjtPFMQlvoQusCLLW19nhAz2jK X-Gm-Gg: ATEYQzxwiDUFmDpyxpZZYhcLP6eXBeMI9Is6oMt5sBiC7X9R0rkeiR8OWK63mwGRFKj DLJYjhN9j1PaJmqUXLITeu4ZjgLdprgXcHGslQSKBN0kMyWX128ej1hAPhSwYvNymxgO5XhkpxQ kNSVNgwqDpZOHvCN89HlcLfD8Tnnm61h8Tymu8ONLDvRhl6xXvmJuURsqt6+R5od3dnddZ2Cuge QWppYB9OgY/Z2iMAqugxhm9GmOeu8Xb41J4KMYUCQcCxLwMab7qNLPf7XKvCoDBk+fZKCyskL2v s3lhUU55re5iqycM/kpgjREA5GQtyLX1HFnWDnAauk2eXmhPNvEOMn6ZG8gooVPNSxASIlin36A m48bdiLuTWmbFczVLCTALh88aoXY7nn1C0J0FfUKwKiyot5PQg/2F7k9H5Dm5n4DcPlCIrWCY/3 ZmiZR7f02/RUO6i4KRrKoxZlmipkqUaQ== X-Received: by 2002:a05:600c:3504:b0:485:3e20:4013 with SMTP id 5b1f17b1804b1-48727f0b109mr170977975e9.28.1774867494040; Mon, 30 Mar 2026 03:44:54 -0700 (PDT) Received: from biju.lan ([2a00:23c4:a758:8a01:e60:2c8a:54bb:d692]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48727bfc5ecsm185842685e9.1.2026.03.30.03.44.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Mar 2026 03:44:53 -0700 (PDT) From: Biju X-Google-Original-From: Biju To: Biju Das , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Cc: Chris Brandt , Laurent Pinchart , Sam Ravnborg , dri-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven , Prabhakar Mahadev Lad , Biju Das , stable@vger.kernel.org Subject: [PATCH v3 2/3] drm: renesas: rzg2l_mipi_dsi: Increase reset deassertion delay Date: Mon, 30 Mar 2026 11:44:45 +0100 Message-ID: <20260330104450.128512-3-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260330104450.128512-1-biju.das.jz@bp.renesas.com> References: <20260330104450.128512-1-biju.das.jz@bp.renesas.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Biju Das The RZ/G2L hardware manual (Rev. 1.50, May 2025), Section 34.4.2.1, requires waiting at least 1 msec after deasserting the CMN_RSTB signal before the DSI-Tx module is ready. Increase the delay from 1 usec to 1 msec by replacing udelay(1) with fsleep(1000) for RZ/G2L SoCs. Fixes: 7a043f978ed1 ("drm: rcar-du: Add RZ/G2L DSI driver") Cc: stable@vger.kernel.org Signed-off-by: Biju Das --- v2->v3: * Moved the patch from patch#4 to patch#2. * Added fixes tag. * Updated commit description. v1->v2: * Updated commit header and description. --- drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c index ff95cb9a7de5..9d9f77d8f949 100644 --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c @@ -528,7 +528,7 @@ static int rzg2l_mipi_dsi_dphy_init(struct rzg2l_mipi_dsi *dsi, if (ret < 0) return ret; - udelay(1); + fsleep(1000); return 0; } -- 2.43.0