From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CE70413AD05; Mon, 16 Dec 2024 15:15:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734362130; cv=none; b=ieRtVz26/V0KZbUqTexs4smP7DTFcvVswdBQns4fLO2U6A0ggu5aTucJhARcSujSdTE80QP4k9LA56CzCu8a+rZ5pUruPmKTMvpxUXxqI2fxx/M14fCaGAJ8Oao5TLYPVH4qrYlxyRaWfYhyE3J36jXbrDaZLse7ar4HXk1rFTY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734362130; c=relaxed/simple; bh=z/S2dbnbuwVGgWSP5DjTd2xz5J2yjesQyGfT2LzlwUw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=SGg0jeJbMVsCd4yCpZslTstcXIeeNNTLRpdCOMUUUtuaE7/sSpg2MI9gRSrRu33eOlPySqoQBfPDoAQI6HBQfP4Xer8Xp53ry6nzZ87kHCG6Il91Z/D1hk+VuCMwfHlmb5B03+bh9l1I69ahA5zyUvLAU2Mavd7ZJxXNDqFe/yo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=GVPO9BoT; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="GVPO9BoT" Received: from [192.168.88.20] (91-157-155-49.elisa-laajakaista.fi [91.157.155.49]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 893CA675; Mon, 16 Dec 2024 16:14:46 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1734362088; bh=z/S2dbnbuwVGgWSP5DjTd2xz5J2yjesQyGfT2LzlwUw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=GVPO9BoTkvpq7Dnt9ss/1/TsC/1F+1Sl4DSsPqu4B4zCf4cCo8SiDc6LAWnGTm5Aj CnsC/mBXEn+GvT5Y2VpoqygVmR55XFOg441DhkIGwefkpDk9nkOcP/rqrzKz05jlp5 i+ps9Q+aFzWtRgU3E4sX38fcokp2/5uIzsSrHliQ= Message-ID: <631bda4c-2226-4693-bcb8-a64872533c6c@ideasonboard.com> Date: Mon, 16 Dec 2024 17:15:20 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 10/10] arm64: dts: renesas: gray-hawk-single: Add DisplayPort support To: Geert Uytterhoeven Cc: Laurent Pinchart , Kieran Bingham , Andrzej Hajda , Neil Armstrong , Robert Foss , Jonas Karlman , Jernej Skrabec , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Geert Uytterhoeven , Magnus Damm , Michael Turquette , Stephen Boyd , LUU HOAI , Jagan Teki , Sam Ravnborg , Biju Das , dri-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Laurent Pinchart , linux-clk@vger.kernel.org, Tomi Valkeinen References: <20241206-rcar-gh-dsi-v3-0-d74c2166fa15@ideasonboard.com> <20241206-rcar-gh-dsi-v3-10-d74c2166fa15@ideasonboard.com> Content-Language: en-US From: Tomi Valkeinen Autocrypt: addr=tomi.valkeinen@ideasonboard.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi, On 16/12/2024 15:33, Geert Uytterhoeven wrote: > Hi Tomi, > > On Fri, Dec 6, 2024 at 10:33 AM Tomi Valkeinen > wrote: >> From: Tomi Valkeinen >> >> Add support for the mini DP output on the Gray Hawk board. >> >> Signed-off-by: Tomi Valkeinen >> Reviewed-by: Laurent Pinchart >> Tested-by: Geert Uytterhoeven > > Thanks for your patch, which is now commit b1000645dc29701f > ("arm64: dts: renesas: gray-hawk-single: Add DisplayPort support") > in renesas-devel/renesas-dts-for-v6.14. > > Apparently this patch breaks s2idle on Gray Hawk Single when "[PATCH > v3 06/10] drm/rcar-du: dsi: Add r8a779h0 support" is not present, or > when CONFIG_DRM_RCAR_USE_MIPI_DSI is not enabled. If the DSI driver > is not available, the ti_sn65dsi86.bridge part fails to probe with > -EPROBE_DEFER and "failed to attach dsi host". Still, the sn65dsi86 > driver must do something critical, as resuming from s2idle now hangs. > I haven't identified yet where exactly it hangs. > > As a result, s2idle is broken in current renesas-devel, which only > has the DTS changes. Perhaps I should drop the DTS until the issue > is resolved? I'm fine with that. The DT bindings are still under work anyway. > However, I suspect White Hawk has the same issue (if > CONFIG_DRM_RCAR_USE_MIPI_DSI=n), but I cannot verify as my local White > Hawk is currently not available for kernel testing. I can reproduce on White Hawk. And I agree that it's probably related to sn65dsi86. I use modules, so I tried dropping modules to see when the issue goes away. And it's always sn65dsi86. So without the rcar DRM & DSI modules loaded, if I load or don't load sn65dsi86, I see or don't see the hang, respectively. Even if I drop the ti_sn65dsi86_pm_ops, it doesn't help. And looks like just doing the i2c_add_driver() part in ti_sn65dsi86_init() will cause the issue, so it's something that happens there. I'll continue the debug later. Tomi