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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 5B45BC433E0 for ; Sat, 6 Jun 2020 08:06:25 +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 1EB2E207DF for ; Sat, 6 Jun 2020 08:06:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1EB2E207DF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=i2se.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 71E176E030; Sat, 6 Jun 2020 08:06:24 +0000 (UTC) Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.135]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7C2126E030 for ; Sat, 6 Jun 2020 08:06:23 +0000 (UTC) Received: from [192.168.1.164] ([37.4.249.202]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1M89XH-1jcGuL2Rud-005Eie; Sat, 06 Jun 2020 10:06:14 +0200 Subject: Re: [PATCH v3 070/105] drm/vc4: hdmi: rework connectors and encoders To: Maxime Ripard References: <020de18840a1075b2671736c6cc2e451030fad74.1590594512.git-series.maxime@cerno.tech> <20200602155421.niyvpwqc42xh5c7v@gilmour> <6cd190e0-c81c-8e47-3ca8-22360de9b46d@i2se.com> <20200605143536.i6cc2v57eupmlvtn@gilmour.lan> From: Stefan Wahren Autocrypt: addr=stefan.wahren@i2se.com; keydata= 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Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <20200605143536.i6cc2v57eupmlvtn@gilmour.lan> Content-Language: en-US X-Provags-ID: V03:K1:4GY4dLMLfpuTJ5ZYwV/QbelUAStEcVpnB+DioeLib8h9jU8wW2V NUkYnde/l25nkj8HKHxUfF7yYkIQx9q+ilOzoeEwdRR3pU6mGJ39wb+RVqZNyjzhhVdWx// 2aRnZEZJT2hWz8/adUqlL47oR1e7wxXyqgqtEGPm1wX8KtbcTg1Urht7D7qRtWNGS8xH1JY /PRT3QnOqfwxGYeaZCwSA== X-UI-Out-Filterresults: notjunk:1;V03:K0:b6wZ2B4kMlI=:92vNNL/IOZG3OHnfHIEoXm MVnS3Se80cQyvy3NUyAfW3ycuFrm+/43QTM4BFDOiXNOZcxg1fw+xPtAFGsmf62Eeg9vmyBcL aVj4Y/x3bqDQDSbteUCJsw1zNBdbBO71smP0VAEUnFtQo94NuwLQlybB5c/rfeWSppV5cVRBA JS9uBmi2lBZWbcn1o62fZUbgjgvOQCsV/cC0Nk5ZGB7rOJS03BlFQuEnyNWYE1GbQc4w7gKLu 4xhyYl6cRvyDYmmcMhn4+j9scE5LbyCByphu6h3SBJeH6jQFcsSRqfi7wxfWXaOAqzsTpSdYU Q27SHpvxJkMciPm1knKez1NDmwzfV8fUXElk0thBtH1S5jmKbKNBGZW00uwOlpswzMxOEx+3d XkcjTpiIRbE8nUZddu72Q/lXzVLMiygoGHTP1RoVHATe+rh/cK7VMAxmm6iz5FCfxyd083e4m Aq729NXfkxBmAUerdwcf9VSPxV+wCzmNpKUlYEy7ntDf9Z9e3+rHqsWnBz4jI3AkTzs61kK8Z 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05.06.20 um 16:35 schrieb Maxime Ripard: > Hi Stefan, > > On Wed, Jun 03, 2020 at 07:32:30PM +0200, Stefan Wahren wrote: >> Am 02.06.20 um 17:54 schrieb Maxime Ripard: >>> On Wed, May 27, 2020 at 11:41:24AM -0700, Eric Anholt wrote: >>>> On Wed, May 27, 2020 at 8:51 AM Maxime Ripard wrot= e: >>>>> the vc4_hdmi driver has some custom structures to hold the data it ne= eds to >>>>> associate with the drm_encoder and drm_connector structures. >>>>> >>>>> However, it allocates them separately from the vc4_hdmi structure whi= ch >>>>> makes it more complicated than it needs to be. >>>>> >>>>> Move those structures to be contained by vc4_hdmi and update the code >>>>> accordingly. >>>>> @@ -1220,7 +1219,7 @@ static int vc4_hdmi_bind(struct device *dev, st= ruct device *master, void *data) >>>>> struct drm_device *drm =3D dev_get_drvdata(master); >>>>> struct vc4_dev *vc4 =3D drm->dev_private; >>>>> struct vc4_hdmi *hdmi; >>>>> - struct vc4_hdmi_encoder *vc4_hdmi_encoder; >>>>> + struct drm_encoder *encoder; >>>>> struct device_node *ddc_node; >>>>> u32 value; >>>>> int ret; >>>>> @@ -1229,14 +1228,10 @@ static int vc4_hdmi_bind(struct device *dev, = struct device *master, void *data) >>>>> if (!hdmi) >>>>> return -ENOMEM; >>>>> >>>>> - vc4_hdmi_encoder =3D devm_kzalloc(dev, sizeof(*vc4_hdmi_encod= er), >>>>> - GFP_KERNEL); >>>>> - if (!vc4_hdmi_encoder) >>>>> - return -ENOMEM; >>>>> - vc4_hdmi_encoder->base.type =3D VC4_ENCODER_TYPE_HDMI0; >>>>> - hdmi->encoder =3D &vc4_hdmi_encoder->base.base; >>>>> - >>>>> hdmi->pdev =3D pdev; >>>>> + encoder =3D &hdmi->encoder.base.base; >>>>> + encoder->base.type =3D VC4_ENCODER_TYPE_HDMI0; >>>> Wait, does this patch build? >>> All those patches were build tested, so yep >>> >>>> setting struct drm_encoder->base.type =3D VC4_* seems very wrong, when >>>> previously we were setting struct vc4_hdmi_encoder->base.type (struct >>>> vc4_encoder->type). >>> So the structure layout now is that vc4_hdmi embeds vc4_hdmi_encoder as >>> encoder. So &hdmi->encoder is a pointer to vc4_hdmi_encoder. >>> vc4_hdmi_encoder's base is since that patch a struct vc4_encoder. and >>> vc4_encoder's base is a drm_encoder. >>> >>> so encoder being a drm_encoder is correct there. >>> >>> However, drm_encoder's base is drm_mode_object that does have a type >>> field, which is an uint32_t, which will accept a VC4_ENCODER_TYPE_* just >>> fine... >>> >>> Now, drm_encoder_init will then kick in and call drm_mode_object_add >>> which will override it to a proper value and since the clock select bit >>> in the PV is the same for both HDMI0 and HDMI1, everything works just >>> fine... >>> >>> Good catch, I'll fix it. And I guess it's a good indication we don't >>> need a separate HDMI0 and HDMI1 encoder type. >>> >> FWIW this is the first patch which breaks X on my Raspberry Pi 3 B. >> >> Here are the bisect results: >> >> 587d6e4a529a8d807a5c0bae583dd432d77064d6 bad (black screen, no heartbeat) >> >> b0523c7b1c9d0edcd6c0fe6d2cb558a9ad5c60a8 good >> >> 2c6a651cac6359cb0244a40d3b7a14e72918f169 good >> >> 1705c3cb40906863ec0d24ee5ea5092f5ee2e994 bad (black screen, but heartbea= t) >> >> 601527fea6bb226abd088a864e74b25368218e87 good >> >> 2165607ede34d229d0cbce916c70c7fb6c0337be good >> >> f094f388fc2df848227e2ae648df2c97872df42b good >> >> 020de18840a1075b2671736c6cc2e451030fad74 bad (black screen, but heartbea= t) >> >> 4c4da3823e4d1a8189e96a59a79451fff372f70b good >> >> 020de18840a1075b2671736c6cc2e451030fad74 is the first bad commit >> commit 020de18840a1075b2671736c6cc2e451030fad74 >> Author: Maxime Ripard >> Date:=A0=A0 Mon Jan 6 17:17:29 2020 +0100 >> >> =A0=A0=A0 drm/vc4: hdmi: rework connectors and encoders >> =A0=A0=A0 >> =A0=A0=A0 the vc4_hdmi driver has some custom structures to hold the dat= a it >> needs to >> =A0=A0=A0 associate with the drm_encoder and drm_connector structures. >> =A0=A0=A0 >> =A0=A0=A0 However, it allocates them separately from the vc4_hdmi struct= ure which >> =A0=A0=A0 makes it more complicated than it needs to be. >> =A0=A0=A0 >> =A0=A0=A0 Move those structures to be contained by vc4_hdmi and update t= he code >> =A0=A0=A0 accordingly. >> =A0=A0=A0 >> =A0=A0=A0 Signed-off-by: Maxime Ripard > So it looks like there was two issues on the Pi3. The first one was > causing the timeouts (and therefore likely the black screen but > heartbeat case you had) and I've fixed it. > > However, I can indeed reproduce the case with the black screen / no > heartbeat you mentionned. My bisection however returns that it's the > patch "drm/vc4: hdmi: Implement finer-grained hooks" that is at fault. > I've pushed my updated branch, if you have some spare time, it would be > great if you could confirm it on your Pi. yesterday i checked out your latest rpi4-kms branch, but i was still facing similiar issues with my Raspberry Pi 3 and multi_v7_defconfig (heartbeat stops, splashscreen freeze, heartbeat is abnormal fast). So i tried to bisect but the offending commit didn't cause an issue the second time. By accident i noticed that a simple reboot seems to hang for at least 8 minutes (using b0523c7b1c9d0edcd the base of your branch). This usually take a few seconds. So i consider this base on linux-next as too unstable for reliable testing. Is it possible to rebase this on something more stable like linux-5.7 or at least drm-misc-next? This should avoid chasing unrelated issues. Regards Stefan > > Thanks! > Maxime _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel