From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.forwardemail.net (smtp.forwardemail.net [149.28.215.223]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D67A23CA4A0 for ; Tue, 25 Aug 2026 21:06:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=149.28.215.223 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787691975; cv=none; b=nMYiF2HammgJNV3iknoSQgseEyIK3Fn7WhqjPDJ0EKlFG5QrEiJAxZG444UsqundsVxvQXhNQ7JlzouP5AcR4lvBClSIBff23OCzV1MU9yJXc51JGwayafEfb+y6392xtWG6ReR2cgUnJvKKFcdbERYeJYVI0D8Rp8nCeK3QGuE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787691975; c=relaxed/simple; bh=bUmGqiGJN1LIhHuKEpPHFBWlPa9jmzxDZwZzMhWy5aA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=kez2yRIqJTrzmrivjBj6RVWea2OGEh0vbkZPB/AzspSy0yJR2bZ3pzS6I+Jbxu015JFDqcIbpz1RIR4iluAEOs9IZcSJqIDvQQEqrIlgVToNrj8E6SIVJrX8yUQUIOZ9rhOdhrw/V5VV/Xpy4WIKO1+RMIVLAGvvk6Z+H6OyG4w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lineageos.org; spf=pass smtp.mailfrom=fe-bounces.lineageos.org; dkim=pass (1024-bit key) header.d=lineageos.org header.i=@lineageos.org header.b=DSQOrOLD; arc=none smtp.client-ip=149.28.215.223 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lineageos.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fe-bounces.lineageos.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=lineageos.org header.i=@lineageos.org header.b="DSQOrOLD" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lineageos.org; h=Content-Transfer-Encoding: Content-Type: In-Reply-To: From: References: Cc: To: Subject: MIME-Version: Date: Message-ID; q=dns/txt; s=fe-2eefaa527c; t=1787691967; bh=mXPE1zcGo976EzGHDXx5Ar7VnZP3PdhjhoOGWAuejoE=; b=DSQOrOLDqyXuBLtYTU76CByocWFEvOaHKDTtS3uZEVSvss4pzHxOoy4vifXyLtuwmIwHYsF30 HZisROCXVUaGY5aFRaRUSdW3kCYiemkUToey9/CZhOU74kO2rtsDTIQV8xcMUYWneEK0WXopC+O 0vWGuJKMaFSeXuVDbx+i4F8= X-Forward-Email-ID: 6a8e03b750593cdd5fd1e5f7 X-Forward-Email-Sender: rfc822; tturner@lineageos.org, smtp.forwardemail.net, 149.28.215.223 X-Forward-Email-Version: 2.13.16 X-Forward-Email-Website: https://forwardemail.net X-Complaints-To: abuse@forwardemail.net X-Report-Abuse: abuse@forwardemail.net X-Report-Abuse-To: abuse@forwardemail.net Message-ID: <135d48e7-58ac-48b8-8fa5-c2548e2f3ae9@lineageos.org> Date: Tue, 25 Aug 2026 22:05:53 +0100 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: To: Sam Protsenko , Alexey Klimov Cc: "robh@kernel.org" , "krzk+dt@kernel.org" , "conor+dt@kernel.org" , krzysztof.kozlowski@oss.qualcomm.com, peter.griffin@linaro.org, alim.akhtar@samsung.com, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org References: Content-Language: en-GB From: Thomas Turner In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi Sam and Alexey, On 19/08/2026 20:51, Sam Protsenko wrote: > Can you please tell us a bit about how you tested this patch, and on > which board? As DPU is not currently enabled on Exynos850 SoC, I'm not > sure how exactly GPU can be useful. If you have a use case or a > testing procedure we can run on the E850-96 board, please share. > Sam, Alexey could you please test GPU on the E850-96 board by following these instructions: 1) Apply this patch series locally 2) Change status="disabled"; to status="okay"; 3) Make sure these configs are enabled: CONFIG_DRM_SIMPLEDRM=y CONFIG_DRM_PANFROST=y 4) In terms of regulators we set up a basic mali regulator via our secondary bootloader [1] and configured with this dts setup [2], NOTE you may be able to get away with a dummy regulator so try that first. If not I am sure you can replicate something simple with u-boot PMIC. 5) Boot a GUI, I saw Debian was used for the bring-up, that should work 6) Run the following command: $ dmesg | grep "panfrost" 7) Compare that to the output at [3] I hope these instructions make sense, but feel free to send any queries my way. Best Regards, Tom [1] https://github.com/samsungexynos850/uniLoader/commit/6a2ed2d97aaf1616e581d0979f9e56a046093e15 [2] https://github.com/samsungexynos850/linux/commit/68442271304b7c7a410d85118e85df67bcda108a [3] https://gist.github.com/DaemonMCR/63fa564483202642d6d66e628b8e6c90