From patchwork Fri Apr 18 18:46:50 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar X-Patchwork-Id: 14057610 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 3C8ABC369AB for ; Fri, 18 Apr 2025 18:47:22 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 30B9C10E27F; Fri, 18 Apr 2025 18:47:19 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="krPwiwx5"; dkim-atps=neutral Received: from mail-wm1-f45.google.com (mail-wm1-f45.google.com [209.85.128.45]) by gabe.freedesktop.org (Postfix) with ESMTPS id E310C10E3B4 for ; Fri, 18 Apr 2025 18:47:17 +0000 (UTC) Received: by mail-wm1-f45.google.com with SMTP id 5b1f17b1804b1-43cef035a3bso14352705e9.1 for ; Fri, 18 Apr 2025 11:47:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1745002036; x=1745606836; 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=DTNEXdavel8/vpubDiQKjXEe8EbRKVx9/bnL5+H0328=; b=krPwiwx554xK4nTNi9UgPU+9eqwrFsh1pIU7gziFdyaKCJ/MZShAFBPIsxgc4ibAje QGS9Tyaq13H74mKQPtS9oeTxrVJIvSJ2nwNJKOfZHzH9L0xop6pVhhoC5ZXlzcgXp1hL iVqH+2XbSO78jCwEAUtoNEJXyC0pRuh4skPjm87+HUcdZXWi1M8qB7zaXcFfXTUXMh51 8guSIEhXoYtOAj9Abt2dtqxrBZfaRJc+hmvSdGh2dRIiQvbt4LOeh4eMfUUrE6dWI/77 J9p2gZSBtt3PaoxHeUI0Z+t7tiWcdUrMt7ViPyHDcYFSpMlxWVbUJ5RwBBWbsZmf2j/f aOlg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1745002036; x=1745606836; 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=DTNEXdavel8/vpubDiQKjXEe8EbRKVx9/bnL5+H0328=; b=E00KE6Z7MThfna3Fv4NfuRdHNCv4pK+BDxcfyMQhyg/SY57+T5PkHNR6mCQnG72Goo Gxma1ZTfZEbpcQBWo40axFFEzAxvdJtJLveC1vT6N4zvCkQuF/MhuTIc5gFMGMyl011q CfSUjavGY56Pkku+TlfQ+oUw3Ej9dkQYTQbc6svBI1EBCEAf8rdQcAKhxaJqUCUUCJI6 qppomPctWnw5kZWgFHkV0/fKaA9O4yhn8w/a/HYACDeaZs/VnYR1S3Qt2Zd93IVDaw7j kr/3up1iFtwwDAOYwUM2BYOd+SZmw5dIiwCCiZ2m9r9nWL6U+7nxEKb9gu2HVEmtnL6J Wfnw== X-Gm-Message-State: AOJu0YxgrUn9YpkjUaXRZy6/CGicXfptebUV+sf6GK7nkfM8m7b19379 V/u26RB8TbzgzxXPHN4Xr/SgUfZQiDQt6UIecNTuqnwYg0QmEuvl X-Gm-Gg: ASbGncskpebbrjkGJAiqSRg/dhZwnYQlT0dm3p0tWoBiUw1kFGS9Z5X5z8PTVNdWcGq +6dw//EqViTzEQmeKYsj1qeZh9LZq7j1CP1ZLDkVhiUtkkBkzKW5pPSI+6vOBt8W9s8GBGXQojI PB+7SfIBiu0G8teeIbXt0YOhbwnY/zFu450ZRsrYnRGyvJYWlRqGYK4VNXkACRpuHQ3ZWYfHgG7 8mWHL2aVfI0RVpv7r/Fwi0wm4MTxVv6Suz3z0awP8iyEIm5TWJ3TPDOP1rMB89neoiKphHBlHwp F3OeQPqLZbFJb+nOWbd/pAh/yesfkVHQobm6pMa2uoS67TR3PTEzMBmcMVIwwcJlNZHVoYTjPoS c X-Google-Smtp-Source: AGHT+IHLNwX1tMI/YGMuExRRpoPK3Z1dH7iRYyCehXiPk1akwv6jtSV9sHiaV+vtCzbBE7ulWs579Q== X-Received: by 2002:a05:6000:40dd:b0:39c:27cc:7ba3 with SMTP id ffacd0b85a97d-39efba6d50bmr3192738f8f.33.1745002036337; Fri, 18 Apr 2025 11:47:16 -0700 (PDT) Received: from iku.Home ([2a06:5906:61b:2d00:36cb:c641:13d7:bd3d]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-39efa4931b8sm3404336f8f.80.2025.04.18.11.47.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Apr 2025 11:47:15 -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 07/15] drm: renesas: rz-du: mipi_dsi: Simplify HSFREQ calculation Date: Fri, 18 Apr 2025 19:46:50 +0100 Message-ID: <20250418184658.456398-8-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 Simplify the high-speed clock frequency (HSFREQ) calculation by removing the redundant multiplication and division by 8. The updated equation: hsfreq = (mode->clock * bpp) / (dsi->lanes); produces the same result while improving readability and clarity. Additionally, update the comment to clarify the relationship between HS clock bit frequency, HS byte clock frequency, and HSFREQ. 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 | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) 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 ec8baecb9ba5..c5f698cd74f1 100644 --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c @@ -277,10 +277,10 @@ static int rzg2l_mipi_dsi_startup(struct rzg2l_mipi_dsi *dsi, * hsclk: DSI HS Byte clock frequency (Hz) * lanes: number of data lanes * - * hsclk(bit) = hsclk(byte) * 8 + * hsclk(bit) = hsclk(byte) * 8 = hsfreq */ bpp = mipi_dsi_pixel_format_to_bpp(dsi->format); - hsfreq = (mode->clock * bpp * 8) / (8 * dsi->lanes); + hsfreq = (mode->clock * bpp) / dsi->lanes; ret = pm_runtime_resume_and_get(dsi->dev); if (ret < 0)