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 224561090255 for ; Thu, 19 Mar 2026 16:48:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0DDEE10E890; Thu, 19 Mar 2026 16:48:43 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="nbP9hNpr"; 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 D054C10E517 for ; Thu, 19 Mar 2026 16:48:39 +0000 (UTC) Received: by mail-wm1-f51.google.com with SMTP id 5b1f17b1804b1-485392de558so7570255e9.1 for ; Thu, 19 Mar 2026 09:48:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1773938918; x=1774543718; 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=Ko0JSoqc92if9jLRax/3q0IGpdS1ahpKtbD0W9dlNH0=; b=nbP9hNproQTkO4PjZSgECioNe65Nr3HHNbTo0ZqhnaDS/o9fxoGt9LFW4nkZiiWLOS 39vM9A+K3m8I+6JOguGvd/aMNd2HpQID+9DhHXkHRKu5j4yLgLABQrMWen0XE191zO/3 5h6XH4d9lVwuydgADb0vMWqzFxOxYrIiH052f3ryk7VxA5PK5+Z7DcEiOeZtSGvT7//K qAZjcXDH1woksEMSbTMA8gQ5fDj23VX7vf4X4JcFmXoT55+vmLlgEr7tQ/TwjrjAAZAo mBc2Nr2F+9nBV8/CYxV2+BpAC7PRRcpjtpr0I5MHuGhTzDNZfrC5bqV/zmFV7/sSAsbC eAWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773938918; x=1774543718; 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=Ko0JSoqc92if9jLRax/3q0IGpdS1ahpKtbD0W9dlNH0=; b=q8avIIVlJN3Q+tMAEiELD3xxlC/ZwjYV0vzHFFNLwJS+Rtd3nt7GkEL5aFl3OMhQr3 J7CHj/Td2eHi1O8VxY042bg2/+eRxjW589BccVmPZmc5pKy6XGfWS54+9y75Fm07K1Pu QypZvkTAx5RnzTfwTTykhPTKgBjSiWic3iNi2oC1Aid1v9CMO52l502M5oO3FFVvfICp WuBQefslaqKl7JcDhSA2q5Ns+cU1b4ID5DTEQo/rJ8JugA08oHVLNoXT0UZpotoJWz/P s6PojLLlBpdjrOFwAg0cQc3u1DijYNw9pi/Dlv4hFItF8/uBQkYEweppJadgi61witdG J/CA== X-Forwarded-Encrypted: i=1; AJvYcCX4G5m8oXbbQtsh8OCMEx8KKd4kkhF5K4IKV7ek+pY5NicuDqIz+DCFkfxCoxGHLZV1wPKQFgxJDII=@lists.freedesktop.org X-Gm-Message-State: AOJu0YztLsnLhiv7D0HcTj4plQ189Y178SyJ6jzHI+NoNjqdpl63f9To dOUA8DWzbLM1HUnu+0GAE4yEpF7zMHSGpHDPtEZShhuXrvzPNsr4TdJ4 X-Gm-Gg: ATEYQzxBpg9r8Wd1s44PEa0AMkasFLpAUPVdBNQ6rzw2PiC6hmeRo+vssqzvK3ytowT iHBnn/TAYi1CMB+Dr6870RT4OW8TLgFd670SXN6SBY1B6Dn3WwqXfiXAoCCtCTpz+oItqENHM5z rm5+xHK7LM4HdIbX2nxNJswpnX/CmhzWvFYGqU83UVfGpEYB+Cn3xMJ/JUfb877oJ/+TPYZaf+S 0IiDhmiGWlppDUNfM/87Q0IbCmJsB9eovBhu3P0ZJYWQ1ip0fGywG/v0q6xPFBGk9oRJS2vqvGy oJUbHRpmSpPVl0Mp/emRPW2UvfQj7mcvOgf8vsf6VR35CavBHvABMwNBWajGTYstmDWWF4qWX8t Cgn4TUn+l3RtxDko+W8+F0PIzSkqYCyCZ6AOsKYhPPsI/vkt3XVPe3URviLDQngyuHNxRBBlKkU DJxdggfGmgmCQGsgCo+maSE3iO3mwWCn0= X-Received: by 2002:a05:600c:1d10:b0:485:3eba:ab96 with SMTP id 5b1f17b1804b1-486f4421c4cmr140167715e9.3.1773938918105; Thu, 19 Mar 2026 09:48:38 -0700 (PDT) Received: from biju.lan ([2a00:23c4:a758:8a01:8326:7b31:bf82:d2d0]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-486fe68ec05sm5238505e9.0.2026.03.19.09.48.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Mar 2026 09:48:37 -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 , Hugo Villeneuve , 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 Subject: [PATCH v2 4/4] drm: renesas: rzg2l_mipi_dsi: Increase reset deassertion delay to 1 msec Date: Thu, 19 Mar 2026 16:48:28 +0000 Message-ID: <20260319164833.409126-5-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260319164833.409126-1-biju.das.jz@bp.renesas.com> References: <20260319164833.409126-1-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 more than 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). Signed-off-by: Biju Das --- 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 5020be0f72ac..715872130780 100644 --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c @@ -807,7 +807,7 @@ static int rzg2l_mipi_dsi_startup(struct rzg2l_mipi_dsi *dsi, if (ret < 0) goto err_phy; - udelay(1); + fsleep(1000); } return 0; -- 2.43.0