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 6B7FC30E844; Fri, 20 Jun 2025 06:39:58 +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=1750401598; cv=none; b=ArJAM6QlCUHmC/CAs2p7WQyPzsz8Yqtltf/oKCtuVJYlBQJ2Sx6+/BEeeaMjJMB1zkDQjtxxQeL8NCK5fjaVlfbM51zvQvxyAc+bzzfbnbicuiBlPmhUc5xYaTob+MF57KXr3kaWCNYW2DT5ZgWMCYc6eDYKz5/4JVjxjnKTU34= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750401598; c=relaxed/simple; bh=Q4BLX/kGOS9c+oKCKscjEbAEZt0bVN/TK9wuGaG8z6M=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=uEW7d5Ndew5xwBbvAMFRWQeXMpWEJ81n8g4bSOanO2oKmuA20T6qZC0WKkk3I/N/HMoigNmcSosOvtAOTELYavOf3pTvTnXfVg6qwIX6OzANC5KwohSS9cd3lGQeQltUb5swHSv4ekc7cGe0l2P8Przz/8iIEXNk4k9sAz/z1Tw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XoTMqWnI; 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="XoTMqWnI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3DA7EC4CEED; Fri, 20 Jun 2025 06:39:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750401598; bh=Q4BLX/kGOS9c+oKCKscjEbAEZt0bVN/TK9wuGaG8z6M=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=XoTMqWnIPhAsYnfZdHvel9XoVARixwj5lSf2fhgZiaNMhAXO/4HUsMdboUYAw3P82 fgWEKuAC6SKT7riAHM4BoSZ1DOdNSn0rt3edDIfkhiuYPcSGn4aL9nmkme8l8w+LDJ g+geI83/sGbwnN/D+FkaoI6qY7H5rBMjwn9De+fm5bXwJAcWC/Db9vna62QklmtDmy ahoqbTcDRngF4li86BjInIDZ60Slbn0MEbFQtLZSrjmOSCLS7BMyoidC3HJohY1x2H yhbND/OPK7R3nSF80GD0asBPHE7neO//G+50La3/ZHMXNyeTmNYwHmnapIYX931WYv cQ15kv8RXYotg== Message-ID: Date: Fri, 20 Jun 2025 08:39:53 +0200 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/5] dt-bindings: media: qcom,sm8550-iris: add non_pixel and resv_region properties To: Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Bryan O'Donoghue , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250620-video_cb-v1-0-9bcac1c8800c@quicinc.com> <20250620-video_cb-v1-1-9bcac1c8800c@quicinc.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 20/06/2025 08:20, Vikash Garodia wrote: > Existing definition limits the IOVA to an addressable range of 4GiB, and > even within that range, some of the space is used by IO registers, > thereby limiting the available IOVA to even lesser. Video hardware is > designed to emit different stream-ID for pixel and non_pixel buffers, > thereby introduce a non_pixel sub node to handle non_pixel stream-ID. > > With this, both iris and non_pixel device can have IOVA range of 0-4GiB > individually. Certain video usecases like higher video concurrency needs > IOVA higher than 4GiB. > > Add the "resv_region" property, which defines reserved IOVA regions that > are *excluded* from addressable range. Video hardware generates > different stream IDs based on the range of IOVA addresses. Thereby IOVA > addresses for firmware and data buffers need to be non overlapping. For > ex. 0x0-0x25800000 address range is reserved for firmware stream-ID, > while non_pixel (bitstream ) stream-ID can be generated by hardware only > when bitstream buffers IOVA address is from 0x25800000-0xe0000000. > > Signed-off-by: Vikash Garodia > --- > .../bindings/media/qcom,sm8550-iris.yaml | 35 ++++++++++++++++++++++ > 1 file changed, 35 insertions(+) > > diff --git a/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml b/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml > index c79bf2101812d83b99704f38b7348a9f728dff44..a1e83bae3c36f3a4c58b212ef457905e38091b97 100644 > --- a/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml > +++ b/Documentation/devicetree/bindings/media/qcom,sm8550-iris.yaml > @@ -65,10 +65,45 @@ properties: > - const: core > > iommus: > + minItems: 1 As discussed in other patchset, this needs clear explanation, so imperfect patch won't be used in future discussions as argument to take more of such things. > maxItems: 2 > > dma-coherent: true > > + resv_region: DTS coding style. Anyway, regions go with memory-region bindings. Use that. Best regards, Krzysztof