From patchwork Tue Oct 2 22:43:40 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jesse Barnes X-Patchwork-Id: 1539481 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by patchwork2.kernel.org (Postfix) with ESMTP id BA767DFFAD for ; Tue, 2 Oct 2012 22:46:56 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 79A6E9EE97 for ; Tue, 2 Oct 2012 15:46:56 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from oproxy7-pub.bluehost.com (oproxy7-pub.bluehost.com [67.222.55.9]) by gabe.freedesktop.org (Postfix) with SMTP id BD8B29E848 for ; Tue, 2 Oct 2012 15:44:05 -0700 (PDT) Received: (qmail 12307 invoked by uid 0); 2 Oct 2012 22:44:05 -0000 Received: from unknown (HELO box514.bluehost.com) (74.220.219.114) by oproxy7.bluehost.com with SMTP; 2 Oct 2012 22:44:05 -0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=virtuousgeek.org; s=default; h=References:In-Reply-To:Message-Id:Date:Subject:To:From; bh=LiiwmPyUunMiMHy62psoZ90GeJFc8cQHdh86SOVwkTI=; b=P2wK47Ywvzz64m6YpIHbR16A3Nf3o+DbPNYqrB9AWJqjoUBpA/xwANFzwNTDM9Oxvv6FhhvR0kDof9i4Tr9STAh79ATFrXBBW99zj3werta3eGy/zT7HZB517IGRlstx; Received: from [192.55.60.129] (port=30963 helo=jbarnes-t420.nims.intel.com) by box514.bluehost.com with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.76) (envelope-from ) id 1TJBC9-00065W-A1 for intel-gfx@lists.freedesktop.org; Tue, 02 Oct 2012 16:44:05 -0600 From: Jesse Barnes To: intel-gfx@lists.freedesktop.org Date: Tue, 2 Oct 2012 17:43:40 -0500 Message-Id: <1349217826-2538-7-git-send-email-jbarnes@virtuousgeek.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1349217826-2538-1-git-send-email-jbarnes@virtuousgeek.org> References: <1349217826-2538-1-git-send-email-jbarnes@virtuousgeek.org> X-Identified-User: {10642:box514.bluehost.com:virtuous:virtuousgeek.org} {sentby:smtp auth 192.55.60.129 authed with jbarnes@virtuousgeek.org} Subject: [Intel-gfx] [PATCH 06/12] drm/i915: implement WaDisableVLVClockGating_VBIIssue on VLV X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: intel-gfx-bounces+patchwork-intel-gfx=patchwork.kernel.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+patchwork-intel-gfx=patchwork.kernel.org@lists.freedesktop.org This allows us to get the right vblank interrupt frequency. Signed-off-by: Jesse Barnes --- drivers/gpu/drm/i915/intel_pm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 0659317..828629b 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3687,6 +3687,13 @@ static void valleyview_init_clock_gating(struct drm_device *dev) PIPEA_HLINE_INT_EN | PIPEA_VBLANK_INT_EN | SPRITEB_FLIPDONE_INT_EN | SPRITEA_FLIPDONE_INT_EN | PLANEA_FLIPDONE_INT_EN); + + /* + * WaDisableVLVClockGating_VBIIssue + * Disable clock gating on th GCFG unit to prevent a delay + * in the reporting of vblank events. + */ + I915_WRITE(VLV_GUNIT_CLOCK_GATE, GCFG_DIS); } static void g4x_init_clock_gating(struct drm_device *dev)