From patchwork Mon Aug 17 07:44:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Shankar, Uma" X-Patchwork-Id: 11716675 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 873D5722 for ; Mon, 17 Aug 2020 07:12:00 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6F4DD20772 for ; Mon, 17 Aug 2020 07:12:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6F4DD20772 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 94EE78903B; Mon, 17 Aug 2020 07:11:59 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 65C678903B for ; Mon, 17 Aug 2020 07:11:58 +0000 (UTC) IronPort-SDR: w3dspnHRNMtTL9Kjg3RRRxPxO8K0TQNO3q54JkJFLSQOoDtDnP69i2XJ+2R3EIyLGDFrjDUkqa i5KETzZpZEnw== X-IronPort-AV: E=McAfee;i="6000,8403,9715"; a="142477020" X-IronPort-AV: E=Sophos;i="5.76,322,1592895600"; d="scan'208";a="142477020" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Aug 2020 00:11:57 -0700 IronPort-SDR: c6SGyWBJwh4phDQs6+6XHcA0ULhmcDz+LgdQZ3X3UTR5ox0ccaTY3yDXm9Vw8XBHYe3NABuywU JmgZuHp48J9A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.76,322,1592895600"; d="scan'208";a="333993170" Received: from unknown (HELO linuxpresi1-desktop.iind.intel.com) ([10.223.74.152]) by FMSMGA003.fm.intel.com with ESMTP; 17 Aug 2020 00:11:55 -0700 From: Uma Shankar To: intel-gfx@lists.freedesktop.org Date: Mon, 17 Aug 2020 13:14:18 +0530 Message-Id: <20200817074418.24045-1-uma.shankar@intel.com> X-Mailer: git-send-email 2.22.0 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH] drm/i915/display: Add an extra vblank wait before fbc activation X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 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" Add an extra vblank before fbc is activated. WA: 1409689360 Corruption with FBC around plane 1A enabling. In the Frame Buffer Compression programming sequence "Display Plane Enabling with FBC" add a wait for vblank between plane enabling step 1 and FBC enabling step 2. Signed-off-by: Uma Shankar Signed-off-by: Stanislav Lisovskiy --- drivers/gpu/drm/i915/display/intel_fbc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c index 2ab32e6532ff..0ed252ff2c53 100644 --- a/drivers/gpu/drm/i915/display/intel_fbc.c +++ b/drivers/gpu/drm/i915/display/intel_fbc.c @@ -1085,10 +1085,12 @@ static void __intel_fbc_post_update(struct intel_crtc *crtc) if (!intel_fbc_can_activate(crtc)) return; - if (!fbc->busy_bits) + if (!fbc->busy_bits) { + intel_wait_for_vblank(dev_priv, crtc->pipe); intel_fbc_hw_activate(dev_priv); - else + } else { intel_fbc_deactivate(dev_priv, "frontbuffer write"); + } } void intel_fbc_post_update(struct intel_atomic_state *state,