From patchwork Tue Oct 21 10:58:55 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dheeraj Jamwal X-Patchwork-Id: 5122851 Return-Path: X-Original-To: patchwork-ltsi-dev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 891209F349 for ; Tue, 21 Oct 2014 12:11:13 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A4CC720109 for ; Tue, 21 Oct 2014 12:11:12 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BCDED200E0 for ; Tue, 21 Oct 2014 12:11:11 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id F2CA31503; Tue, 21 Oct 2014 11:15:00 +0000 (UTC) X-Original-To: ltsi-dev@lists.linuxfoundation.org Delivered-To: ltsi-dev@mail.linuxfoundation.org Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 755EECFD for ; Tue, 21 Oct 2014 11:14:55 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 2D21A201F0 for ; Tue, 21 Oct 2014 11:14:55 +0000 (UTC) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP; 21 Oct 2014 04:14:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,761,1406617200"; d="scan'208";a="617801283" Received: from ubuntu-desktop.png.intel.com ([10.221.122.25]) by fmsmga002.fm.intel.com with ESMTP; 21 Oct 2014 04:14:54 -0700 From: Dheeraj Jamwal To: ltsi-dev@lists.linuxfoundation.org Date: Tue, 21 Oct 2014 18:58:55 +0800 Message-Id: <1413889294-31328-936-git-send-email-dheerajx.s.jamwal@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1413889294-31328-1-git-send-email-dheerajx.s.jamwal@intel.com> References: <1413889294-31328-1-git-send-email-dheerajx.s.jamwal@intel.com> X-Spam-Status: No, score=-5.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org Subject: [LTSI-dev] [PATCH 0935/1094] drm/i915: Only update shared dpll state when needed X-BeenThere: ltsi-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "A list to discuss patches, development, and other things related to the LTSI project" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: ltsi-dev-bounces@lists.linuxfoundation.org Errors-To: ltsi-dev-bounces@lists.linuxfoundation.org X-Virus-Scanned: ClamAV using ClamSMTP From: Daniel Vetter Instead of every time it isn't active: We only need to do that when the pll is currently unused, i.e. when pll->refcount == 0. For paranoia add a warning for the ibx case where plls have a fixed mapping and hence should always be unused after the call to intel_put_shared_dpll. v2: Simplify control flow and use struct assignment instead of memcpy as suggested by Damien. Reviewed-by: Damien Lespiau Signed-off-by: Daniel Vetter (cherry picked from commit f2a69f44aff8d96eb9080b97e39f3230b2c02ab2) Signed-off-by: Dheeraj Jamwal --- drivers/gpu/drm/i915/intel_display.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 4bdf5d1..af31ffb 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3600,6 +3600,8 @@ static struct intel_shared_dpll *intel_get_shared_dpll(struct intel_crtc *crtc) DRM_DEBUG_KMS("CRTC:%d using pre-allocated %s\n", crtc->base.base.id, pll->name); + WARN_ON(pll->refcount); + goto found; } @@ -3633,14 +3635,14 @@ static struct intel_shared_dpll *intel_get_shared_dpll(struct intel_crtc *crtc) return NULL; found: + if (pll->refcount == 0) + pll->hw_state = crtc->config.dpll_hw_state; + crtc->config.shared_dpll = i; DRM_DEBUG_DRIVER("using %s for pipe %c\n", pll->name, pipe_name(crtc->pipe)); if (pll->active == 0) { - memcpy(&pll->hw_state, &crtc->config.dpll_hw_state, - sizeof(pll->hw_state)); - DRM_DEBUG_DRIVER("setting up %s\n", pll->name); WARN_ON(pll->on); assert_shared_dpll_disabled(dev_priv, pll);