From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2BDEDC433F5 for ; Tue, 21 Sep 2021 13:45:10 +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 EC249610CA for ; Tue, 21 Sep 2021 13:45:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org EC249610CA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5AC446E989; Tue, 21 Sep 2021 13:45:09 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 019206E989 for ; Tue, 21 Sep 2021 13:45:06 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10113"; a="223003882" X-IronPort-AV: E=Sophos;i="5.85,311,1624345200"; d="scan'208";a="223003882" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Sep 2021 06:36:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.85,311,1624345200"; d="scan'208";a="556931720" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.171]) by fmsmga002.fm.intel.com with SMTP; 21 Sep 2021 06:35:56 -0700 Received: by stinkbox (sSMTP sendmail emulation); Tue, 21 Sep 2021 16:35:56 +0300 Date: Tue, 21 Sep 2021 16:35:56 +0300 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= To: "Souza, Jose" Cc: "Mun, Gwan-gyeong" , "intel-gfx@lists.freedesktop.org" Message-ID: References: <20210914212507.177511-1-jose.souza@intel.com> <20210914212507.177511-3-jose.souza@intel.com> <1fb0554d051d0c98ae7282110c6690de4619a970.camel@intel.com> <2e523c6b149091fb9418bbfd44bde129fb20b7f0.camel@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <2e523c6b149091fb9418bbfd44bde129fb20b7f0.camel@intel.com> X-Patchwork-Hint: comment Subject: Re: [Intel-gfx] [PATCH v2 3/5] drm/i915/display: Workaround cursor left overs with PSR2 selective fetch enabled 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" On Fri, Sep 17, 2021 at 09:33:59PM +0000, Souza, Jose wrote: > On Fri, 2021-09-17 at 20:49 +0300, Ville Syrjälä wrote: > > On Fri, Sep 17, 2021 at 05:02:21PM +0000, Souza, Jose wrote: > > > On Fri, 2021-09-17 at 16:04 +0300, Ville Syrjälä wrote: > > > > On Thu, Sep 16, 2021 at 05:09:08PM +0000, Souza, Jose wrote: > > > > > On Thu, 2021-09-16 at 16:17 +0300, Ville Syrjälä wrote: > > > > > > On Wed, Sep 15, 2021 at 06:18:35PM +0000, Souza, Jose wrote: > > > > > > > On Wed, 2021-09-15 at 17:58 +0300, Ville Syrjälä wrote: > > > > > > > > On Tue, Sep 14, 2021 at 02:25:05PM -0700, José Roberto de Souza wrote: > > > > > > > > > Not sure why but when moving the cursor fast it causes some artifacts > > > > > > > > > of the cursor to be left in the cursor path, adding some pixels above > > > > > > > > > the cursor to the damaged area fixes the issue, so leaving this as a > > > > > > > > > workaround until proper fix is found. > > > > > > > > > > > > > > > > Have you tried warping the cursor clear across the screen while > > > > > > > > a partial update is already pending? I think it will go badly. > > > > > > > > > > > > > > You mean move the cursor for example from 0x0 to 500x500 in one frame? > > > > > > > It will mark as damaged the previous area and the new one. > > > > > > > > > > > > Legacy cursor updates bypass all that stuff so you're not going to > > > > > > updating the sel fetch area for the other planes. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > In fact I'm thinking the mailbox style legacy cursor updates are just > > > > > > > > fundementally incompatible with partial updates since the cursor > > > > > > > > can move outside of the already committed update region any time. > > > > > > > > Ie. I suspect while the cursor is visible we simply can't do partial > > > > > > > > updates. > > > > > > > > > > > > > > Probably I did not understand what you want to say, but each cursor update will be in one frame, updating the necessary area. > > > > > > > > > > > > The legacy cursor uses mailbox updates so there is no 1:1 relationship > > > > > > between actual scanned out frames and cursor ioctl calls. You can > > > > > > have umpteen thousand cursor updates per frame. > > > > > > > > > > Not if intel_legacy_cursor_update() is changed to go to the slow path and do one atomic commit for each move. > > > > > https://patchwork.freedesktop.org/patch/453192/?series=94522&rev=1 > > > > > > > > That's not going to fly. The whole reason for the legacy cursor thing is > > > > that X likes to do thousands of cursor updates per frame. > > > > > > From user experience perspective there is no issues in converting to atomic commit, those 3 videos that I shared with you have this conversion. > > > > I don't know what you've tested but the legacy cursor fastpath is very > > much needed. We've have numerous bug reports whenever it has > > accidentally regressed, and I've witnessed the carnage myself as well. > > Hmm, I guess you didn't actually disable it fully. To do that you > > would have to clear state->legacy_cursor_update explicitly somewhere. > > Thanks for pointing out state->legacy_cursor_update and yes setting it to false makes causes the cursor to lag. > > > > > Either way I just retested the earlier patches just with the nonblocking > > commit for dirtyfb hacked in, and I left the cursor code using the > > half fast path you made it take. The user experience is still as bad > > as before. Just moving the mouse around makes glxgears stutter, and the > > reported fps drops to ~400 from that alone. And doing anything more > > involved like moving windows around is still a total fail. > > I have tested it in a TGL and ADL-P, will try to get some gen9 to try it. > Other than that I don't know what could this big difference between our setups. > I'm using Mate like you with 'enable software compositing window manager' disabled. Not sure. BTW another thing I noticed is that the sel_fetch coordinate calculation code seems super confused: - it seems to do operations between coordinates that don't even live in the same coordinate space (eg. drm_rect_intersect(&clip, &src) where clip is the straight userspace damage coordinates but src is PLANE_SURF relative plane source coordinates) - no checks for plane scaling that I can see but it still assumes it can just assume a 1:1 relationship between src and dst coordinates - bigjoiner also affects the coordinate spaces, so that part too is probably busted -- Ville Syrjälä Intel