From patchwork Fri Sep 12 17:53:34 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= X-Patchwork-Id: 4897111 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 494E6BEEA5 for ; Fri, 12 Sep 2014 17:53:52 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5588D20221 for ; Fri, 12 Sep 2014 17:53:51 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 5B4A72015D for ; Fri, 12 Sep 2014 17:53:50 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D876F6E766; Fri, 12 Sep 2014 10:53:49 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTP id 43C7A6E766 for ; Fri, 12 Sep 2014 10:53:48 -0700 (PDT) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 12 Sep 2014 10:53:47 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,514,1406617200"; d="scan'208";a="598737893" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.65]) by fmsmga002.fm.intel.com with SMTP; 12 Sep 2014 10:53:44 -0700 Received: by stinkbox (sSMTP sendmail emulation); Fri, 12 Sep 2014 20:53:42 +0300 From: ville.syrjala@linux.intel.com To: intel-gfx@lists.freedesktop.org Date: Fri, 12 Sep 2014 20:53:34 +0300 Message-Id: <1410544415-3059-3-git-send-email-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 1.8.5.5 In-Reply-To: <1410544415-3059-1-git-send-email-ville.syrjala@linux.intel.com> References: <1410530426-4905-1-git-send-email-ville.syrjala@linux.intel.com> <1410544415-3059-1-git-send-email-ville.syrjala@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v3 3/4] drm/i915: Skip CURBASE write when nothing changed X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-6.4 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 X-Virus-Scanned: ClamAV using ClamSMTP From: Ville Syrjälä Only write CURBASE when something about the cursor changed. Also eliminate the unnecessary posting read after writing CURCNTR. Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/i915/intel_display.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 82c0ad1..60c1aa4 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -8322,16 +8322,18 @@ static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base) cntl |= CURSOR_PIPE_CSC_ENABLE; } - if (intel_crtc->cursor_cntl != cntl) { + if (intel_crtc->cursor_cntl != cntl) I915_WRITE(CURCNTR(pipe), cntl); - POSTING_READ(CURCNTR(pipe)); - intel_crtc->cursor_cntl = cntl; - } + + if (intel_crtc->cursor_cntl == cntl && + intel_crtc->cursor_base == base) + return; /* and commit changes on next vblank */ I915_WRITE(CURBASE(pipe), base); POSTING_READ(CURBASE(pipe)); + intel_crtc->cursor_cntl = cntl; intel_crtc->cursor_base = base; }