From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 92EF624B26; Thu, 5 Jun 2025 09:08:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749114482; cv=none; b=LjMIccFq5rFDsoxSwGGOleOvmR5hGatXS5DZT3SHNffMHbDEDbc62Vvigj6cGWlJZtD/iwQHYEFiRZ50jBzzd9ff7uD/mGkn5Hst801hQoU5xlg2qTNYmluPSia9lyviU/cEasnjuu4snU6SmqnOmpskI2+ZPnX5BrISUXrBlAI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749114482; c=relaxed/simple; bh=CyX7HgtIvMmKLzh8J3zSwCHKH/WTU9NyS5ypKYnMkxc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=rXAd4jA7wrH7tuZvc7GkmKgYbFGS4zsqQmzVTXVnDA/WCwXYiKez+aYrxIW6yF+Jj2ZDEmiCU6thUcby0cjYczWfIMZZ1bxFmvMk2A+u/6vHd5BQ6tuEIFMLw3hzZytMrrfyGyMr3xUEE4QLM/UiqE4Ewx9vDeIAJDQrcuITPjU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=a7U9Yb+S; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="a7U9Yb+S" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E1743C4CEE7; Thu, 5 Jun 2025 09:07:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1749114482; bh=CyX7HgtIvMmKLzh8J3zSwCHKH/WTU9NyS5ypKYnMkxc=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=a7U9Yb+SqGsm+c80AqmOszRWqlGlkSCDyTv4P/UyrbaxB1hSRaWX+Qw1/s7uqBcUI zIXZuDVKPICC1BBKKI4pWjTi0LNYgD9C3LlyXMKv6IGgwMlSjaT6C07tfw4/Q8R4+v ZaOK2W8iTP92vrNH5sC5PcdFm/i8co6sQqtbt6joyXj98ccvEeBm9kQQEpuqSzeikS IOQLTGwZotPp2jcGeFooVFZ9zO3f+lq0zrP7h070oEw6cXVqxRLcboVS5/1CtnVByW VNi5btXUikB1fDG2/PHTmBiGcBTpDP13Tr2OFOm0/zhhfVQnF36GM3YDXBfU2p6ZBY 7aO0bJbHhAzrg== Message-ID: <4302310a-b233-4cea-9a4b-d463fd1f455f@kernel.org> Date: Thu, 5 Jun 2025 11:07:53 +0200 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: [PATCH v3 3/8] drm/imagination: Use pwrseq for TH1520 GPU power management To: Bartosz Golaszewski , Michal Wilczynski Cc: Drew Fustini , Guo Ren , Fu Wei , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel , Frank Binns , Matt Coster , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Ulf Hansson , Marek Szyprowski , linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, dri-devel@lists.freedesktop.org References: <20250530-apr_14_for_sending-v3-0-83d5744d997c@samsung.com> <20250530-apr_14_for_sending-v3-3-83d5744d997c@samsung.com> <20250603-whispering-jaybird-of-thunder-f87867@kuoka> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 05/06/2025 10:10, Bartosz Golaszewski wrote: >> >> Bart, >> Given Krzysztof's valid concerns about the current name based >> lookup in pwrseq_get() and the benefits of phandle based resource >> linking in OF platforms: Would you be open to a proposal for extending >> the pwrseq API to allow consumers to obtain a sequencer (or a specific >> target sequence) via a phandle defined in their Device Tree node? For >> instance, a consumer device could specify power-sequencer = >> <&aon> and a new API variant could resolve this. >> > > I can be open to it all I want, but I bet Krzysztof won't be open to > introducing anything like a power-sequencer device property in DT > bindings. Simply because there's no such thing in the physical world. Yep > The concept behind the power sequencing framework was to bind > providers to consumers based on existing links modelling real device > properties (which a "power-sequencer" is not). I commented on it under > another email saying that you already have a link here - the > power-domains property taking the aon phandle. In your pwrseq Exactly. Best regards, Krzysztof