From patchwork Mon Nov 5 13:20:53 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Ville Syrjala X-Patchwork-Id: 1697231 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 2A435DF2AB for ; Mon, 5 Nov 2012 13:21:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0478D9E9FB for ; Mon, 5 Nov 2012 05:21:10 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id 21BD49F772 for ; Mon, 5 Nov 2012 05:20:57 -0800 (PST) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP; 05 Nov 2012 05:20:56 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.80,714,1344236400"; d="scan'208";a="242671155" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.168]) by fmsmga001.fm.intel.com with SMTP; 05 Nov 2012 05:20:54 -0800 Received: by stinkbox (sSMTP sendmail emulation); Mon, 05 Nov 2012 15:20:53 +0200 From: ville.syrjala@linux.intel.com To: intel-gfx@lists.freedesktop.org Date: Mon, 5 Nov 2012 15:20:53 +0200 Message-Id: <1352121653-30904-1-git-send-email-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 1.7.8.6 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v2] drm/i915: Wait for pending flips in intel_pipe_set_base() 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: , 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 From: Ville Syrjälä intel_pipe_set_base() never actually waited for any pending page flips on the CRTC. It looks like it tried to, by calling intel_finish_fb() on the current front buffer. But the pending flips were actually tracked in the BO of the previous front buffer, so the call to intel_finish_fb() never did anything useful. intel_crtc_wait_for_pending_flips() is the current _working_ way to wait for pending page flips. So use it in intel_pipe_set_base() too. Some refactoring was necessary to avoid locking struct_mutex twice. Signed-off-by: Ville Syrjälä Reviewed-by: Chris Wilson --- v2: Shuffle the code around so that intel_crtc_wait_for_pending_flips() just wraps intel_crtc_wait_for_pending_flips_locked(). drivers/gpu/drm/i915/intel_display.c | 76 ++++++++++++++++++--------------- 1 files changed, 41 insertions(+), 35 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 1a38267..a18e6e6 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2228,6 +2228,46 @@ static void intel_crtc_update_sarea_pos(struct drm_crtc *crtc, int x, int y) } } +static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + unsigned long flags; + bool pending; + + if (atomic_read(&dev_priv->mm.wedged)) + return false; + + spin_lock_irqsave(&dev->event_lock, flags); + pending = to_intel_crtc(crtc)->unpin_work != NULL; + spin_unlock_irqrestore(&dev->event_lock, flags); + + return pending; +} + +static void intel_crtc_wait_for_pending_flips_locked(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + + if (crtc->fb == NULL) + return; + + wait_event(dev_priv->pending_flip_queue, + !intel_crtc_has_pending_flip(crtc)); + + intel_finish_fb(crtc->fb); +} + +static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + + mutex_lock(&dev->struct_mutex); + intel_crtc_wait_for_pending_flips_locked(crtc); + mutex_unlock(&dev->struct_mutex); +} + static int intel_pipe_set_base(struct drm_crtc *crtc, int x, int y, struct drm_framebuffer *fb) @@ -2261,8 +2301,7 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y, return ret; } - if (crtc->fb) - intel_finish_fb(crtc->fb); + intel_crtc_wait_for_pending_flips_locked(crtc); ret = dev_priv->display.update_plane(crtc, fb, x, y); if (ret) { @@ -2901,39 +2940,6 @@ static void ironlake_fdi_disable(struct drm_crtc *crtc) udelay(100); } -static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc) -{ - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - unsigned long flags; - bool pending; - - if (atomic_read(&dev_priv->mm.wedged)) - return false; - - spin_lock_irqsave(&dev->event_lock, flags); - pending = to_intel_crtc(crtc)->unpin_work != NULL; - spin_unlock_irqrestore(&dev->event_lock, flags); - - return pending; -} - -static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc) -{ - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - - if (crtc->fb == NULL) - return; - - wait_event(dev_priv->pending_flip_queue, - !intel_crtc_has_pending_flip(crtc)); - - mutex_lock(&dev->struct_mutex); - intel_finish_fb(crtc->fb); - mutex_unlock(&dev->struct_mutex); -} - static bool ironlake_crtc_driving_pch(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev;