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=-15.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 56887C433E6 for ; Tue, 12 Jan 2021 18:03:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 118EE23121 for ; Tue, 12 Jan 2021 18:03:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406004AbhALSDj (ORCPT ); Tue, 12 Jan 2021 13:03:39 -0500 Received: from relay01.th.seeweb.it ([5.144.164.162]:48779 "EHLO relay01.th.seeweb.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727622AbhALSDh (ORCPT ); Tue, 12 Jan 2021 13:03:37 -0500 Received: from IcarusMOD.eternityproject.eu (unknown [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by m-r1.th.seeweb.it (Postfix) with ESMTPSA id 489341F665; Tue, 12 Jan 2021 19:02:55 +0100 (CET) Subject: Re: [PATCH 9/9] drm/msm/dpu: Fix timeout issues on command mode panels To: linux-arm-msm@vger.kernel.org Cc: konrad.dybcio@somainline.org, marijn.suijten@somainline.org, martin.botka@somainline.org, phone-devel@vger.kernel.org, robdclark@gmail.com, sean@poorly.run, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20210109133736.143469-1-angelogioacchino.delregno@somainline.org> <20210109133736.143469-10-angelogioacchino.delregno@somainline.org> From: AngeloGioacchino Del Regno Message-ID: Date: Tue, 12 Jan 2021 19:02:54 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: <20210109133736.143469-10-angelogioacchino.delregno@somainline.org> Content-Type: text/plain; charset=iso-8859-15; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Il 09/01/21 14:37, AngeloGioacchino Del Regno ha scritto: > In function dpu_encoder_phys_cmd_wait_for_commit_done we are always > checking if the relative CTL is started by waiting for an interrupt > to fire: it is fine to do that, but then sometimes we call this > function while the CTL is up and has never been put down, but that > interrupt gets raised only when the CTL gets a state change from > 0 to 1 (disabled to enabled), so we're going to wait for something > that will never happen on its own. > > Solving this while avoiding to restart the CTL is actually possible > and can be done by just checking if it is already up and running > when the wait_for_commit_done function is called: in this case, so, > if the CTL was already running, we can say that the commit is done > if the command transmission is complete (in other terms, if the > interface has been flushed). > > Signed-off-by: AngeloGioacchino Del Regno > --- > drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c > index 2311e98480b9..0624864da343 100644 > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c > @@ -695,6 +695,9 @@ static int dpu_encoder_phys_cmd_wait_for_commit_done( > if (!dpu_encoder_phys_cmd_is_master(phys_enc)) > return 0; > > + if (phys_enc->hw_ctl->ops.is_started) > + return dpu_encoder_phys_cmd_wait_for_tx_complete(phys_enc); > + > return _dpu_encoder_phys_cmd_wait_for_ctl_start(phys_enc); > } > > Sorry, this patch is obviously faulty, Took it from the wrong local tree. I will send a V2.