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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 19C5CC4CECD for ; Mon, 27 Apr 2020 20:04:02 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id ACBC1206D6 for ; Mon, 27 Apr 2020 20:04:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ACBC1206D6 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=chris-wilson.co.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4E85589B97; Mon, 27 Apr 2020 20:04:01 +0000 (UTC) Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id 273E489B97 for ; Mon, 27 Apr 2020 20:03:59 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from localhost (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP (TLS) id 21039703-1500050 for multiple; Mon, 27 Apr 2020 21:03:56 +0100 MIME-Version: 1.0 In-Reply-To: <20200427195247.GB3168@jack.zhora.eu> References: <20200427085408.13879-1-chris@chris-wilson.co.uk> <20200427085408.13879-2-chris@chris-wilson.co.uk> <20200427195247.GB3168@jack.zhora.eu> From: Chris Wilson To: Andi Shyti Message-ID: <158801783494.17035.12443833459251562558@build.alporthouse.com> User-Agent: alot/0.8.1 Date: Mon, 27 Apr 2020 21:03:54 +0100 Subject: Re: [Intel-gfx] [PATCH 2/9] drm/i915/gt: Fix up clock frequency X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Quoting Andi Shyti (2020-04-27 20:52:47) > Hi Chris, > > On Mon, Apr 27, 2020 at 09:54:01AM +0100, Chris Wilson wrote: > > The bspec lists both the clock frequency and the effective interval. The > > interval corresponds to observed behaviour, so adjust the frequency to > > match. > > what is the observed behavior? The PM intervals are 1280ns for older HW, not 640ns as implied by the 25MHz clock. Wrote a selftest to measure the PM ticks and confirmed the intervals are correct, the frequency isn't. -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx