From patchwork Mon Dec 9 12:42:56 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rodrigo Vivi X-Patchwork-Id: 3310771 Return-Path: X-Original-To: patchwork-intel-gfx@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 ECD469F37C for ; Mon, 9 Dec 2013 12:42:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AC91120253 for ; Mon, 9 Dec 2013 12:42:50 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id F3768201EF for ; Mon, 9 Dec 2013 12:42:45 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DDAEBFAE4F; Mon, 9 Dec 2013 04:42:42 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mail-qe0-f43.google.com (mail-qe0-f43.google.com [209.85.128.43]) by gabe.freedesktop.org (Postfix) with ESMTP id EE9C3FA561 for ; Mon, 9 Dec 2013 04:42:38 -0800 (PST) Received: by mail-qe0-f43.google.com with SMTP id 2so2786343qeb.30 for ; Mon, 09 Dec 2013 04:42:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=XzIC5AYmgEq2++YaDp778PRxMB6XBfBI20l8kysdwRw=; b=jBjzf8PArEQokan1U1KZxj08uOV0l/t/Mxb2Zxv4YIgftCTjnUvALWGOMvrDEXWIYY BnopCqg6FWYhbIlCHKCSnwW287A9qwZaimFBQQvc9k+JDa2sMeC8RAE2R1FQuiXWH+3A 7EgGc9vzwKiZ96qYP3r3pj3gEx5NntvN9Yq9VMpTOfLTczOUp8Ynirtn/JnnqynT1bpk PEweusdUM+0ofn/QxLJMLYxD8YuQ19BytPZWPRCwPuhGnHyTBFqvTpEq2CQbe+Zz0Hbs K2hf+1kl0FA7zgZBAX7bZby4xWvuSSO+3YhZjpxx1WdyzDAuK7c+l6LT57AAj8BGyd/E sxmA== X-Received: by 10.49.110.202 with SMTP id ic10mr33081733qeb.18.1386592958654; Mon, 09 Dec 2013 04:42:38 -0800 (PST) Received: from localhost.localdomain (200.188.217.18.dedicated.neoviatelecom.com.br. [200.188.217.18]) by mx.google.com with ESMTPSA id u17sm29462116qeb.4.2013.12.09.04.42.37 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 09 Dec 2013 04:42:37 -0800 (PST) From: Rodrigo Vivi To: intel-gfx@lists.freedesktop.org Date: Mon, 9 Dec 2013 10:42:56 -0200 Message-Id: <1386592983-3529-2-git-send-email-rodrigo.vivi@gmail.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1386592983-3529-1-git-send-email-rodrigo.vivi@gmail.com> References: <1386592983-3529-1-git-send-email-rodrigo.vivi@gmail.com> Subject: [Intel-gfx] [PATCH 1/8] drm/i915: Asynchronously perform the set-base for a simple modeset 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@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, T_DKIM_INVALID, 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: Chris Wilson A simple modeset, where we only wish to switch over to a new framebuffer such as the transition from fbcon to X, takes around 30-60ms. This is due to three factors: 1. We need to make sure the fb->obj is in the display domain, which incurs a cache flush to ensure no dirt is left on the scanout. 2. We need to flush any pending rendering before performing the mmio so that the frame is complete before it is shown. 3. We currently wait for the vblank after the mmio to be sure that the old fb is no longer being shown before releasing it. (1) can only be eliminated by userspace preparing the fb->obj in advance to already be in the display domain. This can be done through use of the create2 ioctl, or by reusing an existing fb->obj. However, (2) and (3) are already solved by the existing page flip mechanism, and it is surprisingly trivial to wire them up for use in the set-base fast path. Though it can be argued that this represents a subtle ABI break in that the set_config ioctl now returns before the old framebuffer is unpinned. The danger is that userspace will start to modify it before it is no longer being shown, however we should be able to prevent that through proper domain tracking. By combining all of the above, we can achieve an instaneous set_config: [ 6.601] (II) intel(0): switch to mode 2560x1440@60.0 on pipe 0 using DP2, position (0, 0), rotation normal [ 6.601] (II) intel(0): Setting screen physical size to 677 x 381 v2 (by Vivi): page_flip_flag was added to intel_crtc_page_flip in a previous commit. using 0. Signed-off-by: Chris Wilson Signed-off-by: Rodrigo Vivi Reviewed-by: Rodrigo Vivi --- drivers/gpu/drm/i915/intel_display.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 0bb3d6d..035588a 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -9967,10 +9967,13 @@ static int intel_crtc_set_config(struct drm_mode_set *set) ret = intel_set_mode(set->crtc, set->mode, set->x, set->y, set->fb); } else if (config->fb_changed) { - intel_crtc_wait_for_pending_flips(set->crtc); - - ret = intel_pipe_set_base(set->crtc, - set->x, set->y, set->fb); + if (to_intel_framebuffer(set->fb)->obj->ring == NULL || + save_set.x != set->x || save_set.y != set->y || + intel_crtc_page_flip(set->crtc, set->fb, NULL, 0)) { + intel_crtc_wait_for_pending_flips(set->crtc); + ret = intel_pipe_set_base(set->crtc, + set->x, set->y, set->fb); + } } if (ret) {