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[81.96.50.79]) by smtp.gmail.com with ESMTPSA id c132sm5830516wma.22.2021.09.30.13.20.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 30 Sep 2021 13:20:54 -0700 (PDT) Message-ID: Date: Thu, 30 Sep 2021 21:20:52 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.1 Subject: Re: [PATCH v4 00/24] drm/bridge: Make panel and bridge probe order consistent Content-Language: en-US To: Amit Pundir , Rob Clark Cc: John Stultz , Maxime Ripard , Andrzej Hajda , Sam Ravnborg , Daniel Vetter , David Airlie , Jonas Karlman , Laurent Pinchart , Thierry Reding , Maarten Lankhorst , Thomas Zimmermann , Neil Armstrong , Robert Foss , Jernej Skrabec , Sean Paul , "open list:DRM DRIVER FOR MSM ADRENO GPU" , Kyungmin Park , lkml , Xinliang Liu , Seung-Woo Kim , Tian Tao , Inki Dae , Linux Samsung SOC , linux-arm-msm , dri-devel , Chen Feng , Xinwei Kong , Joonyoung Shim References: <20210910101218.1632297-1-maxime@cerno.tech> From: Caleb Connolly In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Hi, On 30/09/2021 20:49, Amit Pundir wrote: > On Thu, 30 Sept 2021 at 04:50, Rob Clark wrote: >> >> On Wed, Sep 29, 2021 at 2:51 PM John Stultz wrote: >>> >>> On Wed, Sep 29, 2021 at 2:32 PM John Stultz wrote: >>>> On Wed, Sep 29, 2021 at 2:27 PM John Stultz wrote: >>>>> On Fri, Sep 10, 2021 at 3:12 AM Maxime Ripard wrote: >>>>>> The best practice to avoid those issues is to register its functions only after >>>>>> all its dependencies are live. We also shouldn't wait any longer than we should >>>>>> to play nice with the other components that are waiting for us, so in our case >>>>>> that would mean moving the DSI device registration to the bridge probe. >>>>>> >>>>>> I also had a look at all the DSI hosts, and it seems that exynos, kirin and msm >>>>>> would be affected by this and wouldn't probe anymore after those changes. >>>>>> Exynos and kirin seems to be simple enough for a mechanical change (that still >>>>>> requires to be tested), but the changes in msm seemed to be far more important >>>>>> and I wasn't confortable doing them. >>>>> >>>>> >>>>> Hey Maxime, >>>>> Sorry for taking so long to get to this, but now that plumbers is >>>>> over I've had a chance to check it out on kirin >>>>> >>>>> Rob Clark pointed me to his branch with some fixups here: >>>>> https://gitlab.freedesktop.org/robclark/msm/-/commits/for-mripard/bridge-rework >>>>> >>>>> But trying to boot hikey with that, I see the following loop indefinitely: >>>>> [ 4.632132] adv7511 2-0039: supply avdd not found, using dummy regulator >>>>> [ 4.638961] adv7511 2-0039: supply dvdd not found, using dummy regulator >>>>> [ 4.645741] adv7511 2-0039: supply pvdd not found, using dummy regulator >>>>> [ 4.652483] adv7511 2-0039: supply a2vdd not found, using dummy regulator >>>>> [ 4.659342] adv7511 2-0039: supply v3p3 not found, using dummy regulator >>>>> [ 4.666086] adv7511 2-0039: supply v1p2 not found, using dummy regulator >>>>> [ 4.681898] adv7511 2-0039: failed to find dsi host >>>> >>>> I just realized Rob's tree is missing the kirin patch. My apologies! >>>> I'll retest and let you know. >>> >>> Ok, just retested including the kirin patch and unfortunately I'm >>> still seeing the same thing. :( >>> >>> Will dig a bit and let you know when I find more. >> >> Did you have a chance to test it on anything using drm/msm with DSI >> panels? That would at least confirm that I didn't miss anything in >> the drm/msm patch to swap the dsi-host vs bridge ordering.. > > Hi, smoke tested > https://gitlab.freedesktop.org/robclark/msm/-/commits/for-mripard/bridge-rework > on Pocophone F1 (sdm845 / A630) with v5.15-rc3. I see no obvious > regressions in my limited testing so far including video (youtube) > playback. Tested on the OnePlus 6 too booting AOSP, works fine. This *fixes* FBDEV_EMULATION (so we can get a working framebuffer console) which was otherwise broken on 5.15. However it spits out some warnings during boot: https://p.calebs.dev/gucysowyna.yaml > >> >> BR, >> -R -- Kind Regards, Caleb (they/them)