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 X-Spam-Level: X-Spam-Status: No, score=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48967C433E0 for ; Thu, 14 May 2020 08:28:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EEBCB20675 for ; Thu, 14 May 2020 08:28:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="GstG9I6h" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726113AbgENI2N (ORCPT ); Thu, 14 May 2020 04:28:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725935AbgENI2M (ORCPT ); Thu, 14 May 2020 04:28:12 -0400 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:3201:214:fdff:fe10:1be6]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CDA86C061A0C for ; Thu, 14 May 2020 01:28:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Iqx+R9RDnrWxC9fRW/DBM4vpRxdzcnblY4Sl8eFkAaY=; b=GstG9I6hknIsoz0GovgM/aKyw EOehkTOlDR+MGFWAu7a5CoJMVuTeM52dktLtmWG1IUTMC/D+Yi6lkQ5K0qL0LYEOI1QxS+YWG3UIT O2hb9kA+yw8UK97d6jTAY2SMjJoCylS0lO322C/SwZNJS52j8wT2p6O4pcCPqF18PUalGCja7QmCk MIvyJt3c5zoWFKS9wWnG10ZNsqAEOBz+LAT20a8DCisLnhKygRF2mL9IgpiP/PahEUAgV8SSjBKap NbagSgPI9Il7iUjkTkjTeCNk0Ni3t89PHrObFfwaI4vgvyW8eLWhZI29+XjxJ90SaGEb7tALpQoD/ pQdL653pg==; Received: from shell.armlinux.org.uk ([2002:4e20:1eda:1:5054:ff:fe00:4ec]:57828) by pandora.armlinux.org.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jZ9Di-0007Ua-GB; Thu, 14 May 2020 09:27:58 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1jZ9Dg-0000Pj-2w; Thu, 14 May 2020 09:27:56 +0100 Date: Thu, 14 May 2020 09:27:56 +0100 From: Russell King - ARM Linux admin To: Lucas Stach Cc: Fabio Estevam , Lubomir Rintel , linux-kernel , DRI mailing list , The etnaviv authors , Christian Gmeiner Subject: Re: [PATCH 2/3] drm/etnaviv: Don't ignore errors on getting clocks Message-ID: <20200514082755.GN1551@shell.armlinux.org.uk> References: <20200513150007.1315395-1-lkundrak@v3.sk> <20200513150007.1315395-3-lkundrak@v3.sk> <1e15be39906034a95b86c026e060ed9866586d94.camel@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1e15be39906034a95b86c026e060ed9866586d94.camel@pengutronix.de> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 14, 2020 at 10:18:02AM +0200, Lucas Stach wrote: > Am Mittwoch, den 13.05.2020, 23:41 -0300 schrieb Fabio Estevam: > > On Wed, May 13, 2020 at 2:09 PM Fabio Estevam wrote: > > > > > The binding doc Documentation/devicetree/bindings/gpu/vivante,gc.yaml > > > says that only the 'reg' clock could be optional, the others are > > > required. > > > > arch/arm/boot/dts/dove.dtsi only uses the 'core' clock. > > arch/arm/boot/dts/stm32mp157.dtsi uses 'bus' and 'core' > > > > Maybe the binding needs to be updated and it seems that using > > devm_clk_get_optional() like you propose is safe. > > The binding is correct as-is. We want to require those clocks to be > present, but the dove DT was added before the binding was finalized, so > the driver still treats the clocks as optional to not break > compatibility with old DTs. Maybe this warrants a comment in the > code... The binding doc in mainline says: clocks: items: - description: AXI/master interface clock - description: GPU core clock - description: Shader clock (only required if GPU has feature PIPE_3D) - description: AHB/slave interface clock (only required if GPU can gate slave interface independently) minItems: 1 maxItems: 4 clock-names: items: enum: [ bus, core, shader, reg ] minItems: 1 maxItems: 4 which looks correct to me - and means that Dove is compliant with that. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 10.2Mbps down 587kbps up