From patchwork Sat Sep 11 16:39:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 509221 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 765ECC433F5 for ; Sat, 11 Sep 2021 16:39:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 55E7D61215 for ; Sat, 11 Sep 2021 16:39:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229487AbhIKQkm (ORCPT ); Sat, 11 Sep 2021 12:40:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35868 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231139AbhIKQkg (ORCPT ); Sat, 11 Sep 2021 12:40:36 -0400 Received: from relay02.th.seeweb.it (relay02.th.seeweb.it [IPv6:2001:4b7a:2000:18::163]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8432FC061757 for ; Sat, 11 Sep 2021 09:39:23 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu (unknown [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by m-r1.th.seeweb.it (Postfix) with ESMTPSA id 828391F511; Sat, 11 Sep 2021 18:39:21 +0200 (CEST) From: AngeloGioacchino Del Regno To: robdclark@gmail.com Cc: sean@poorly.run, airlied@linux.ie, daniel@ffwll.ch, dmitry.baryshkov@linaro.org, abhinavk@codeaurora.org, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, konrad.dybcio@somainline.org, marijn.suijten@somainline.org, martin.botka@somainline.org, ~postmarketos/upstreaming@lists.sr.ht, phone-devel@vger.kernel.org, paul.bouchara@somainline.org, AngeloGioacchino Del Regno Subject: [PATCH v2 2/2] drm/msm/dpu: Fix timeout issues on command mode panels Date: Sat, 11 Sep 2021 18:39:19 +0200 Message-Id: <20210911163919.47173-2-angelogioacchino.delregno@somainline.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210911163919.47173-1-angelogioacchino.delregno@somainline.org> References: <20210911163919.47173-1-angelogioacchino.delregno@somainline.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org 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 Reviewed-by: Marijn Suijten Reviewed-by: Dmitry Baryshkov --- 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 aa01698d6b25..aa5d3b3cef15 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 @@ -682,6 +682,9 @@ 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(phys_enc->hw_ctl)) + return dpu_encoder_phys_cmd_wait_for_tx_complete(phys_enc); + return _dpu_encoder_phys_cmd_wait_for_ctl_start(phys_enc); }