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 955FA15C0; Thu, 9 Oct 2025 00:55:28 +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=1759971329; cv=none; b=DlPpqtuLnakqMCFNXz/0Y1t5W/gJP9rbAzOZt0980HetISX22TnzIu7FyRIbUx7wel8XAi+oX5WjdbLtdPsMIDG/oQu1eDRHbl0zD/Ux0uTlRSOGf1XhkKuNbjhW4uTIJbHoFUCZu7OC4m48PlgT/wpZqoojNCre1kd1g0zk4A4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759971329; c=relaxed/simple; bh=xZBMTktst1tuqtj2pUL0aURR3U0aoYV/Tq9ePvSHt0I=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=m6fAHuatuU+dut4V5+H5p1SA9+36pwZya5fKZgAysWdrma09x7ksbx9CKxMj9vqj5C6vxmaf7ixFAmJh1jE7AXiaemDnK3761U+J7bUjb+hsrHcb2kFtgxcMrEHM9ErVIp8yruExWysCbSd1WfsxuO1iKoqjmDj776dfXxQlukw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CObzt0z8; 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="CObzt0z8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 74AA2C4CEE7; Thu, 9 Oct 2025 00:55:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1759971328; bh=xZBMTktst1tuqtj2pUL0aURR3U0aoYV/Tq9ePvSHt0I=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=CObzt0z8sGzV++fw2e2HkpWUET2VFCHdsQz+XZLpAbKqs3+Ihe3kYwsUhF7I7SrcU NvF1q2ugbfgPp7B/8xXJMIZCIH3DRs+Rty9DXBcn8gJYnb+nGqO3nKO/W4APFYGcKL std8sPZPWyW8LE1fcmA5K7E8bZEu3bYiawR3wFwFQNOvTntO7iK3Q0YLRx4oYU780y ISD/U7yrD1eztiWCVUwXY6UoVnCrLFUxeY9r6lpYjoMK6dXnNtb+EwQ3IWjzBCwJhx BJ7KNo9iweQ6T8brwB60z7ROqDvtcNbWSNf+Rq/+2vuQthp+n+5x2PYw867zXMrYQ7 4e27Evh/3QAEw== Message-ID: <98e6acf8-80d7-4894-b4ce-ce74660722ef@kernel.org> Date: Thu, 9 Oct 2025 01:55:22 +0100 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 0/5] Introduce "non-pixel" sub node within iris video node To: Krzysztof Kozlowski , Bryan O'Donoghue , Charan Teja Kalla , Bryan O'Donoghue , Dmitry Baryshkov Cc: Konrad Dybcio , Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <7b6db4fa-2f73-376d-4eb3-64c1c7e6cda3@quicinc.com> <4a32bbec-2baf-4210-a7c1-1ddcd45d30c8@oss.qualcomm.com> <4d87d1ca-55b2-426e-aa73-e3fd8c6fe7bd@kernel.org> <10a8ccda-4e27-4b06-9a0e-608d6ade5354@nxsw.ie> <4cb4a92d-2f20-47c7-881e-aadcc6f83aa0@kernel.org> <1516f21e-aee3-42cf-b75e-61142dc9578d@oss.qualcomm.com> <9bae595a-597e-46e6-8eb2-44424fe21db6@linaro.org> From: Bryan O'Donoghue Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 09/10/2025 01:47, Krzysztof Kozlowski wrote: >> Maybe it would be possible to also use an inferred FUNCTION_ID somehow >> though TBH I think that's a work-around. > Three months ago I gave you the answer for that - it is inferred by > index on the list. But at least as I understand it, you can have multiple SID entries that need to map to a FUNCTION_ID which means you need to encode that inferred indexing in your driver. So you can't have the iommu code just know what to do.. it has to be driver specific. The iommu description for this platform basically lacks the data that _should_ be there -> FUNCTION_ID. The rule is that the DT should really describe the hardware right ? --- bod