From patchwork Fri Apr 18 18:46:49 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar X-Patchwork-Id: 14057606 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 0D739C369C9 for ; Fri, 18 Apr 2025 18:47:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1350610E3B4; Fri, 18 Apr 2025 18:47:18 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="Uf8YbWmg"; dkim-atps=neutral Received: from mail-wr1-f47.google.com (mail-wr1-f47.google.com [209.85.221.47]) by gabe.freedesktop.org (Postfix) with ESMTPS id 65B9710E26D for ; Fri, 18 Apr 2025 18:47:16 +0000 (UTC) Received: by mail-wr1-f47.google.com with SMTP id ffacd0b85a97d-39c0dfad22aso1406847f8f.2 for ; Fri, 18 Apr 2025 11:47:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1745002035; x=1745606835; 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=+95RTDXC74PC89KcMLnAbGqS5LYJGQCka2uPYYp6JLM=; b=Uf8YbWmgduBLdNcfM/ndqTQCAl06qKSLJ2MLVnnsHLH2tu5L6x9ij9ufLUS0aJAHmc l2pApgKBN4M1z5b6KBM/Y8oHk6xEuwg3Flt1s/lAbq4iy1Qe8MHfdRob5bOnQ8nLmNoQ 4mM17+RIh72Ab0l5/grgXXEunTHH2sv2HRQr8CeRAZAoenl/A/VlpmTfKbWFYHeup/UC 1k70phf2JHbKKnKTaK0DSAuN/18qXEVhkK+BKMwlsLE7Rt+iQHqEH5jHDdChfHq11sgV SAaY4WtpL2LmjsKVq9c5A8Bx/GRgIGsdzVpJ7T1qaF2vDCpPEjkoXA848eY/U1q9k14Y vh7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1745002035; x=1745606835; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=+95RTDXC74PC89KcMLnAbGqS5LYJGQCka2uPYYp6JLM=; b=hsLrznYoxuyWOg7mRZC42vvqWo7rB+oGZw6DyPffjJnAjsIo3s+oinnU+o/84m/y2R FmmyY3bIxZTiHHYCEFrbkjT0ITGMd+i19+oblxtpr7J3NVBYTFHIMilCrv7wgl98oMMW 8vdqMCaSDy/oQILBWtWIHkWnIGS+DE7rITsAzxyk8ASUh6MQZkNIjD1t8PU/FlwCU8gw pzj9p9Lza27Oe84p5XnCqk/JvzqQCYuexK96oEab2/qV6epp1GAiH9ZOFiY/PzMMDUK/ Rk+aAp19VLa92sAjpnu6f0ctct3nV25Zp4C5KE1qnYUVVJzkrEfk6VgB4NUy8UK0MR9u Z0bA== X-Gm-Message-State: AOJu0YzzUAZ/8ae0OzMaMsr9d2JRAxEjtfDPAv50NGV2alls/RYVlBIj u4fCk8irzYeA0yY2zgYYdaogDeGuQfR+yDZA1iTO1qnMYn9OUQFS X-Gm-Gg: ASbGncujDhdx8bP9jaR30RH9OMbaStoU3pun/A/F79RvgofwXuZgHVBUKfbR1v7McMx 7kk1jByeb/8T59p3TYli7rU5V2hJ6F43UxgB3Odtu77UYOiAJTKyG1K43hEddUhV2HErBFAPhRQ H9En37+GOJ5NY7A3Vg4xBPfknjQ3aS43wuWTEyKAtTcDjfUvykUrFEPzlYA26qpUrf5YLXWz/nG YQ0TqT11P3Vpvv5mh7GBaWfuUHvmf79yVwyhdAoB4BJbNWCis9VUNDSGdeoM6WCKoK4tu5pZskJ QZGwOFZt81L1OBJInYR6dm8GoxNYmv5lrKAFr2Xyn8Wi0qWu+s0LxCcq1pZO9iTvDw== X-Google-Smtp-Source: AGHT+IHwpmosrhJ80ZwpOiqZD+/pdcgM7gyuPqXB6SgIePk3fMcj/ZMOWh1Y9WtUx1n3TFw8Hw7uZQ== X-Received: by 2002:a05:6000:2204:b0:39c:1f04:bb4a with SMTP id ffacd0b85a97d-39efba37ca6mr3012730f8f.10.1745002034821; Fri, 18 Apr 2025 11:47:14 -0700 (PDT) Received: from iku.Home ([2a06:5906:61b:2d00:36cb:c641:13d7:bd3d]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-39efa4931b8sm3404336f8f.80.2025.04.18.11.47.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Apr 2025 11:47:13 -0700 (PDT) From: Prabhakar X-Google-Original-From: Prabhakar To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Biju Das , Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Philipp Zabel , Magnus Damm Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, Prabhakar , Fabrizio Castro , Lad Prabhakar Subject: [PATCH v3 06/15] drm: renesas: rz-du: mipi_dsi: Add min check for VCLK range Date: Fri, 18 Apr 2025 19:46:49 +0100 Message-ID: <20250418184658.456398-7-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250418184658.456398-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20250418184658.456398-1-prabhakar.mahadev-lad.rj@bp.renesas.com> MIME-Version: 1.0 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: Lad Prabhakar The VCLK range for Renesas RZ/G2L SoC is 148.5 MHz to 5.803 MHz. Add a minimum clock check in the mode_valid callback to ensure that the clock value does not fall below the valid range. Co-developed-by: Fabrizio Castro Signed-off-by: Fabrizio Castro Signed-off-by: Lad Prabhakar Reviewed-by: Biju Das --- v2->v3: - No changes v1->v2: - Added Reviewed-by tag from Biju --- drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c | 3 +++ 1 file changed, 3 insertions(+) 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 4550c6d84796..ec8baecb9ba5 100644 --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c @@ -584,6 +584,9 @@ rzg2l_mipi_dsi_bridge_mode_valid(struct drm_bridge *bridge, if (mode->clock > 148500) return MODE_CLOCK_HIGH; + if (mode->clock < 5803) + return MODE_CLOCK_LOW; + return MODE_OK; }