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 73E732DE6E0; Wed, 2 Jul 2025 20:18:20 +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=1751487500; cv=none; b=Lc2uf/r5wtW9HhSk597VOVLNspqyTQ4QxEufcZkTki5v7gwLCuC4yZK+NcZyZkHYiDE63Ens1Nf5W+Z/CShixZvg96O9daFHwtCPmU9aVVOBSf0yN2kAmUFZgs3wjfvFhwRN+UBBtauz1J7BhjxMPBtQlcOjN06LgF/K6jwaY7s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751487500; c=relaxed/simple; bh=NcF5Lgsozi3TFSSbY4XniUHjQlhATuSDYxxjEZOfZVY=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=WgkYUFScg24UkYIGCGYYlAQkyPPaMepuTDqxeXiF64w95V9vGKorgZbabSuZdg+8ao7SwpwhmL4Dz3pSNFqC3m8UVQFltAmLOMd3xKa+xQlvjj0C+g6hTT/ciRiHa3JPHPBDApzanXUf7mOBh/bHNoe5tsaPhNuGoPF7Dwwgby0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YYu+6qs6; 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="YYu+6qs6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA60AC4CEE7; Wed, 2 Jul 2025 20:18:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1751487500; bh=NcF5Lgsozi3TFSSbY4XniUHjQlhATuSDYxxjEZOfZVY=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=YYu+6qs6aYB9p0c253YPNEopymUMpYODORctEmyvnn4d1xFDqP3hIrV+VFnyPEReD 65QDpjzVtHGOZKtl9l0ICaXyUqGetDtpTWa649hp3VFwulZgzb5KjAq6FDcsaOCbpj kx6Io6Cy3aaEU6HO+goGDeES/mRzApt2Wb1meRCabDzlt9SUPXJDVfBdrIsE1YFxed GLONaEor2TxsJRdF9X6GwBT4WKfnW1Hh4wWWgGkDymtuU4NP05M+MnRqSMpWKiI+vp qRl0uwHqvvRpXbPRAjlzdV8iuGvOX5u1v4ZBaVccqEaz+ffJ9uC1Fp1iPgAmcRiBSM d+FC6QGjSOzaw== Message-ID: <5ea33054-8a08-4bb3-81e7-d832c53979dc@kernel.org> Date: Wed, 2 Jul 2025 22:18:10 +0200 Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 07/10] dt-bindings: phy: Add PHY bindings support for FSD SoC To: Shradha Todi , 'Rob Herring' Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org, linux-fsd@tesla.com, mani@kernel.org, lpieralisi@kernel.org, kw@linux.com, bhelgaas@google.com, jingoohan1@gmail.com, krzk+dt@kernel.org, conor+dt@kernel.org, alim.akhtar@samsung.com, vkoul@kernel.org, kishon@kernel.org, arnd@arndb.de, m.szyprowski@samsung.com, jh80.chung@samsung.com, pankaj.dubey@samsung.com References: <20250625165229.3458-1-shradha.t@samsung.com> <20250625165229.3458-8-shradha.t@samsung.com> <20250627211721.GA153863-robh@kernel.org> <02af01dbea78$24f01310$6ed03930$@samsung.com> <02bf01dbea8c$fc835cb0$f58a1610$@samsung.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 01/07/2025 15:35, Shradha Todi wrote: >>> does not support auto adaptation so we need to tune the PHYs >>> according to the use case (considering channel loss, etc). This is why we >> >> So not same? Decide. Either it is same or not, cannot be both. >> >> If you mean that some wiring is different on the board, then how does it >> differ in soc thus how it is per-soc property? If these are use-cases, >> then how is even suitable for DT? >> >> I use your Tesla FSD differently and then I exchange DTSI and compatibles? >> >> You are no describing real problem and both binding and your >> explanations are vague and imprecise. Binding tells nothing about it, so >> it is example of skipping important decisions. >> >>> have 2 different SW PHY initialization sequence depending on the instance >>> number. Do you think having different compatible (something like >>> tesla,fsd-pcie-phy0 and tesla,fsd-pcie-phy1) and having phy ID as platform data >>> is okay in this case? I actually took reference from files like: >> >> And in different use case on same soc you are going to reverse >> compatibles or instance IDs? >> > > Even though both the PHYs are exactly identical in terms of hardware, > they need to be programmed/initialized/configured differently. > > Sorry for my misuse of the word "use-case". To clarify, these configurations > will always remain the same for FSD SoC even if you use it differently. > > I will use different compatibles for them as I understand that it is the best > option. I still do not see the difference in hardware explained. Best regards, Krzysztof