From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx07-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 06A5A1CDFD5; Thu, 28 Aug 2025 13:56:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.207.212.93 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756389370; cv=none; b=JqwP8XI+NOqt746p8rjXFCFIF2BgwRdYyBKt3AI+DlV0jvTQgq9OmRrk5FLWs4g9Dzx+ris+jvBhPB29uSt/qiwf+4Jn0cVO8AS4Egw73aBhAAKNh/CshvWUvLcZgrOCfex8tPouPLZXM43pcUxp/Kj/+Vk8Rb5iDO1hBmcw7oc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756389370; c=relaxed/simple; bh=0PDrSyOFgv4F8LxFwE/7WQbJIFLQJ/sG9Zrg1Q9PUoQ=; h=Message-ID:Date:MIME-Version:Subject:To:CC:References:From: In-Reply-To:Content-Type; b=mPNkDKh+FFNpreSzhKC21ex5lynucOHbzDqB3Y7sY2xugVmSB4cxkSX8mW3U9W1Z2cwXWyjd/tJFzfu/19iYB0DueXM696hzyIEAHaeUtIaQQiS3Hd8g/gArkzwXphPeZ1R/kPzp/dPfvKhHL8WwtDdgqSIfMuMNETkKeeLo0Ro= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com; spf=pass smtp.mailfrom=foss.st.com; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b=mKNgIkdj; arc=none smtp.client-ip=91.207.212.93 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=foss.st.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b="mKNgIkdj" Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 57SBnI4b026021; Thu, 28 Aug 2025 15:55:49 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=selector1; bh= Dm6i+EpyE8QWt4iCU85NedWZbbxEmH/7ZoLUzNKJkZY=; b=mKNgIkdjnJ69Uacm r1W22+vpUjzgOSBN+1ZubxX1Ff+Hd6brat1mwbIqER2QKsFc+VNNWLo9+iXZV1bx U9H06JDsYUVEZ/9CuY7YIjkwCPxv22cS++8EoCsoR3pHH6t0PKnUjcWINPZh7EI5 EE6T73pCi+hoN1otSsxtrBl6y6i/zpkg8MY4YeUR76corYBIf5WZfOhi60sSpdYL rwCi76BlFvV6M7aAnKeeXZUC16zoj8mpKX0CCFBBUb9/5FB5WJGH+lHfVpPvYqVt ID6zdZjWPrSW84SmsgU5asZAsfttFgXXl6CJjd3NCsNg7OT4s33TaTmK6iVZnIwk /ElwSg== Received: from beta.dmz-ap.st.com (beta.dmz-ap.st.com [138.198.100.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 48q626vktc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 28 Aug 2025 15:55:49 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id 3ABAA40048; Thu, 28 Aug 2025 15:54:25 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node1.st.com [10.75.129.69]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 7C14A74F6C6; Thu, 28 Aug 2025 15:53:27 +0200 (CEST) Received: from [10.48.86.145] (10.48.86.145) by SHFDAG1NODE1.st.com (10.75.129.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.57; Thu, 28 Aug 2025 15:53:26 +0200 Message-ID: <676469fd-b957-79f5-9483-749c66bdf270@foss.st.com> Date: Thu, 28 Aug 2025 15:53:25 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: [PATCH v5 08/13] drm/stm: ltdc: handle lvds pixel clock Content-Language: en-US To: Raphael Gallais-Pou , Yannick Fertre , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , "Maxime Coquelin" , Alexandre Torgue , Catalin Marinas , Will Deacon , Christophe Roullier CC: , , , , References: <20250822-drm-misc-next-v5-0-9c825e28f733@foss.st.com> <20250822-drm-misc-next-v5-8-9c825e28f733@foss.st.com> From: Philippe CORNU In-Reply-To: <20250822-drm-misc-next-v5-8-9c825e28f733@foss.st.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SHFCAS1NODE1.st.com (10.75.129.72) To SHFDAG1NODE1.st.com (10.75.129.69) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-28_04,2025-08-28_01,2025-03-28_01 On 8/22/25 16:34, Raphael Gallais-Pou wrote: > From: Yannick Fertre > > Handle LVDS pixel clock. > > The LTDC operates with multiple clock domains for register access, > requiring all clocks to be provided during read/write operations. This > imposes a dependency between the LVDS and LTDC to access correctly all > LTDC registers. And because both IPs' pixel rates must be synchronized, > the LTDC has to handle the LVDS clock. > > Signed-off-by: Yannick Fertre > Acked-by: Yannick Fertre > Signed-off-by: Raphael Gallais-Pou > --- > drivers/gpu/drm/stm/ltdc.c | 22 +++++++++++++++++++++- > drivers/gpu/drm/stm/ltdc.h | 1 + > 2 files changed, 22 insertions(+), 1 deletion(-) Hi Raphael, Acked-by: Philippe Cornu Thanks a lot Philippe :-)