From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paulo Zanoni Subject: [PATCH] drm/i915: remove plane/cursor/pipe assertions from intel_crtc_disable Date: Thu, 17 Jul 2014 11:16:39 -0300 Message-ID: <1405606599-3248-1-git-send-email-przanoni@gmail.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-vc0-f177.google.com (mail-vc0-f177.google.com [209.85.220.177]) by gabe.freedesktop.org (Postfix) with ESMTP id 9B8A86E688 for ; Thu, 17 Jul 2014 07:16:57 -0700 (PDT) Received: by mail-vc0-f177.google.com with SMTP id hy4so4689321vcb.36 for ; Thu, 17 Jul 2014 07:16:56 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: intel-gfx@lists.freedesktop.org Cc: Paulo Zanoni List-Id: intel-gfx@lists.freedesktop.org From: Paulo Zanoni Since we merged runtime PM support for DPMS, it is possible that these assertions will be called when the power wells are disabled but a mode is "set", resulting in "failed assertion" and "device suspended while reading register" WARNs. To reproduce the bug: disable all screens using mode unset, do a modeset on one screen, disable it using DPMS, then try to do a mode unset on it again to see the WARNs. v2: The first version of this patch changed the assertions to also check the power domains. Daniel suggested that it would be better to just remove the assertions: "The modeset state checker will already notice when we've failed to turn off the pipe. And we check cursors and plane state in the enable sequence, too. Since we use these asserts a lot to lock down the precise modeset sequence I actually prefer if they're a bit dumb and don't check the power wells." Testcase: igt/rpm_rpm/dpms-mode-unset-lpsp Testcase: igt/rpm_rpm/dpms-mode-unset-non-lpsp Signed-off-by: Paulo Zanoni --- drivers/gpu/drm/i915/intel_display.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index cb40a94..f4ef59e 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4930,10 +4930,6 @@ static void intel_crtc_disable(struct drm_crtc *crtc) intel_crtc_update_sarea(crtc, false); dev_priv->display.off(crtc); - assert_plane_disabled(dev->dev_private, to_intel_crtc(crtc)->plane); - assert_cursor_disabled(dev_priv, pipe); - assert_pipe_disabled(dev->dev_private, pipe); - if (crtc->primary->fb) { mutex_lock(&dev->struct_mutex); intel_unpin_fb_obj(old_obj); -- 2.0.0