From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 7090040E8D6 for ; Fri, 10 Jul 2026 12:34:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783686844; cv=none; b=l1EvnVc3wQI0PV43kqSe7xv9/OTwWR/zXxfuWuGqUXH2vEbnOQk6BvWSYN6kmbSdXNfSGXbpYPZGJiCd9qfK8jBzp+DP0CdGIw7Q2V1jvXsAeXrkHvj1PSHWOkEb/SNCRTns0XxpjWBOIBeKwdCR2S9v3aExSLQpdDdAbkRblyo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783686844; c=relaxed/simple; bh=gmNJ4oLCqisfWMQ2xkv1odn445Wq7mkxpGEegNDrq9s=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=HFxkkdVROnWg96ER+Cd9vc7sEDATczhRRXH4LQM+hJCBWftdSKaHx94zqKEcmgV5qBBvlV8Jq2zzv255oiAQ20wYP/0SlV1gJBb/u3TJYp5UXVR2HdoAyR5h79kl4YZa44072r7wHr0DD5GU42EXIrBmTWWjb3suJGfe2H9Eegw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=KRImbWqE; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=CCHwbI5P; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="KRImbWqE"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="CCHwbI5P" Received: from pps.filterd (m0279863.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 66AAmk4S615259 for ; Fri, 10 Jul 2026 12:34:00 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= rrOo+UhzctHRE8y7sYY3z4m/BCBdD+Ep7OuN8Y4dfps=; b=KRImbWqEJCCBH65E 35JRXVLMJd7Epy4gVzPxnoEBD4tgtOiLjrGgc7VFqdk9yVX01lX7M5Ot3QGEE035 eUXk4jd4clXRrrsIelZy++ymfQyUK9N5Jzf2Rzom4EeTvDUmSqngsq8SaE8CmNMJ 9sL9tVcon5H0RoRxLdfl7r+NX/vwoJLpVny3Fwfo+dUlODNuTOea6KmLJ8693BTG M+ICDBoRenJ0ziLRec+cJjVOlhKj5nqS6dWp7yYHPHhunZgkBKgkxY06sd5wy/5t Rkt1FWf6EPeUMX8O/qiBXNO+4Ao1H+Q8RGar45jy+jpHySEM1ikcgQ5+gxkWa3ZP qUBYAA== Received: from mail-qv1-f72.google.com (mail-qv1-f72.google.com [209.85.219.72]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4fajte32hg-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Fri, 10 Jul 2026 12:33:59 +0000 (GMT) Received: by mail-qv1-f72.google.com with SMTP id 6a1803df08f44-8f21e4e8b66so4240696d6.3 for ; Fri, 10 Jul 2026 05:33:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1783686839; x=1784291639; darn=vger.kernel.org; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to :content-type; bh=rrOo+UhzctHRE8y7sYY3z4m/BCBdD+Ep7OuN8Y4dfps=; b=CCHwbI5PQ9zTh+vE+92XlwgSXRby8GA+jmEYEOs6V7cPJ72xQon0KwXgXbXWe0lvPp VOGIYIrS0QPDNlyo8koE8R5jrDO20zkVOO8JwOMFUDJxdU8YRGXYNgVsDHGaDUX88jhJ 5FJNdeXm4+Nd4x668gPmvuUL1Gu+oclvuRlQBo9F2H8q4lDmS5fTFq6+C1xCJOfNAxcY xGsspz7jBuulZDCLytxoi5XG8Es2bM1ZQjuiHbMs/A5VIC+P3i/lf4zZi1L6XZsh7VNk 1CLppcSsYy17McMjgP6h2lgItB3zpSa8Fw5PUV5co/MplyQIlsx+jnJ+Upv/qce9lcGT 2LpA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783686839; x=1784291639; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=rrOo+UhzctHRE8y7sYY3z4m/BCBdD+Ep7OuN8Y4dfps=; b=LGeLnW66kvrD7YSv8uJvwnQArYLia/cNcPvwp4D234UriwiHXATnixUKeJoVjR741p EA/pqxXeCrGJLfPYtEF14nWu+3aPm/Hbc4QAtMHvB8D3MCPkktAK1j6iV89jS21ikZkj IqCrzSx3a2T/HHNY3lZDByWb1Z/3MY7KeBj8CwJwjc0dA7Cr617hc5UFoz+69vYkoduO +JT5ALlpLJ3ms7UFuQKEQsNlc/R96+rdC1J/IBRiQeKk4eC+Z2Fm+TcvpmCp5EpqoucY iuTmJxTLvvgE4LhQaBJJTjNGUlSzVQ0ENlukvWly3NBLVHSO/f4cAWfmtl5+zgfFh/Jl 8hZA== X-Forwarded-Encrypted: i=1; AHgh+Rocdt6W7xrscEfcbnms9WOaqgpUr0b0U7OKIZ340IzFbeoXFk63x1xq7LyhCCtqHCwP0yID6T/AL8KTDHQ=@vger.kernel.org X-Gm-Message-State: AOJu0YyC19++ftT67b5UFHaOg9uyZZp6ukZeT9cUuvhBG4QYF1asHt5g C81d6QvJyrtXXRXz04gZ5hrpOfPUHI98wmGWNB4Aw/qMjKaxvR8S3hDDyKjWeTdrlV/YIl6OCzP 4bNhALnhdqkCk7bE2dGzWS7Loekh9cOIijaEd4A1pKS/9hR4WiKLTVUgRpyRoWnC9PjU= X-Gm-Gg: AfdE7cnwH19ctipJsUeHSbWenlCiujigK444MUeVyBQYsCNu6qEtkjqaa1o/IWwoLGa ynpfRrUoie10qS75Afdf6IIre3CwZMRyZ6XQ39d557tDDQMUymPCsNGnqa890jnYrD44/J9aHvx yEvx2ptFCDmiIgQuHo/kcjYNaIPNafR7gpvdxySxjtODsGIXTn+xeTGz3mYEsIZk3FPZz/xROSg DxsC+zYHbn9Oa8tCHJ8wNnljaOTron9ENzzOS3mLPb8wkWBFE9sO//T1ql0KganNJf4AxhGBvk8 P0+KWJYq1Tw3kCROFVKdVE5X9BGRk9mAmGJpXlTNxunTEQAYkhvg3CI2Ppzv/TcpcElAg+osA0Q NCOP6Kto+towQGYAUMP1xRo3LUyfbvXonxho= X-Received: by 2002:a05:6214:4907:b0:8ef:4749:b1c9 with SMTP id 6a1803df08f44-8ff957351eamr82841086d6.5.1783686838740; Fri, 10 Jul 2026 05:33:58 -0700 (PDT) X-Received: by 2002:a05:6214:4907:b0:8ef:4749:b1c9 with SMTP id 6a1803df08f44-8ff957351eamr82840646d6.5.1783686838278; Fri, 10 Jul 2026 05:33:58 -0700 (PDT) Received: from [192.168.120.193] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-69a19ce4b4fsm10705561a12.10.2026.07.10.05.33.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 10 Jul 2026 05:33:56 -0700 (PDT) Message-ID: <1921023f-da03-4f3d-8489-bfa2c5fe4f3b@oss.qualcomm.com> Date: Fri, 10 Jul 2026 14:33:53 +0200 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 v4 0/5] Add Qualcomm JPEG V4L2 encoder for SM8250 To: Dmitry Baryshkov Cc: Bryan O'Donoghue , Vladimir Zapolskiy , Atanas Filipov , linux-media@vger.kernel.org, loic.poulain@oss.qualcomm.com, mchehab@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andersson@kernel.org, konradybcio@kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org References: <8116c54e-4050-4e9d-b236-59d74846bd57@linaro.org> <8a09875d-af5f-438b-b947-bc2b61219b70@oss.qualcomm.com> <8fc1ddfd-0f77-4b67-b9bd-33fbd60e2046@oss.qualcomm.com> <54ad9b8a-7596-4bc7-a1c3-7230cca21360@kernel.org> <29bbcc9d-a0b5-4966-a195-1702ed514a4a@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: ZBgQ-fTUNv8uwv8IXUK88eYPg449PZGe X-Proofpoint-ORIG-GUID: ZBgQ-fTUNv8uwv8IXUK88eYPg449PZGe X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzEwMDEyNSBTYWx0ZWRfX8yFfkzuLdC5n 1ysW4WZnXt6psHOAUB8J3BQWMpozpgA6892fsz6HXtoURbVX9XATFh+pPdOUoGtfSfW4j6AZTCY enMb2vFGbkGRbEFl31igud/uyOgS8RxyGfrkNSTZByCUHAC8fOHhpQ6fubfuAboCMIUwJoZChn+ aQ+/JFjQqyC7aaOdeZG3jYHS0iduLSwxQC3mXHkCP6h3CUci0X7gg9InULTl+Grb/lEg3aYaPjb r8bi1WeoY633bjKIoH1RVPSTjmNDdBh7CejJ1tS4OSzYXVOJtWoJHPCL4BV+XkfUgKwO/fYOxor DyfN4sDLe7wu9jJlPGiWobGxDDBjxv7Xa/BJiM8kEqBEYPb258iV9bkc9/sdBHKo3aC5Qp8Zo4u 4pFpav5KCv69s+xv04HsW5Et2rjRb3KZvZ5yy1keZOJrAuwUAEJFh5lDDaL3YDrb2WnF8W9KaXd O1s4mxHVt2ebcSB2NAg== X-Authority-Analysis: v=2.4 cv=N7MZ0W9B c=1 sm=1 tr=0 ts=6a50e6b7 cx=c_pps a=7E5Bxpl4vBhpaufnMqZlrw==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=dFzIMAVjCySLt-5DOyQA:9 a=QEXdDO2ut3YA:10 a=pJ04lnu7RYOZP9TFuWaZ:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzEwMDEyNSBTYWx0ZWRfX4GjzAslInX6z A/zyo9FM+C2xU2H0XKqI0ZeNiYWP/P52O6ak2I/y3hqfBv/ppf4lGsSwDay9ldi50mX8tSKUyO5 0YZ/UahWCxEp9a6IAkzFo46O6r9G43Q= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-10_03,2026-07-09_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 spamscore=0 impostorscore=0 suspectscore=0 adultscore=0 malwarescore=0 phishscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607100125 On 7/10/26 2:28 PM, Dmitry Baryshkov wrote: > On Thu, Jul 09, 2026 at 08:16:21PM +0200, Konrad Dybcio wrote: >> On 7/9/26 9:33 AM, Dmitry Baryshkov wrote: >>> On Wed, Jul 08, 2026 at 10:21:43PM +0100, Bryan O'Donoghue wrote: >>>> On 08/07/2026 13:19, Konrad Dybcio wrote: >>>>> On 7/7/26 12:41 PM, Bryan O'Donoghue wrote: >>>>>> On 07/07/2026 11:11, Konrad Dybcio wrote: >>>>>>> On 7/7/26 12:00 PM, Bryan O'Donoghue wrote: >>>>>>>> On 07/07/2026 10:24, Konrad Dybcio wrote: >>>>>>>>> On 7/6/26 3:37 PM, Bryan O'Donoghue wrote: >>>>>>>>>> On 06/07/2026 14:02, Vladimir Zapolskiy wrote: [...] >>> Which way of representing device nodes makes it easier to migrate >>> existing platform to the CSI PHY driver, while keeping compatibility >>> with old DTs (yeah, ABI, old DTs must continue to work)? >> >> Quite frankly, I don't consider the existing (meganode) description >> any valid, and would vote to rip it the second a replacement is >> available. But once, not N times. > > Rip without providing backwards compatibility? Because the existing bindings make ensuring the required performance state of power domains impossible, yes > One of the options would be to follow the 'venus/iris' approach: land > new set of component drivers, which target new platforms and provide > minimal support for one old platform (maybe via autoapplied DT overlay > or other similar techniques). Then continue migrating and phasing out > camss driver for old platforms, while adding support for new blocks in > the new set of drivers and ripping support from the camss driver after > some migration time. > >> This is not to blame any of the original implementers, this might >> have seemed like the right idea for the tiny subsystem on msm8916. > > Maybe... Interestingly, there's a number more peirpherals inside the 8916 CAMSS too, I suppose some enthusiasts may poke at that one day, there was quite a sizeable developer base for that SoC at one point. $ rg @ arch/arm64/boot/dts/qcom/msm8916-camera.dtsi 15: qcom,msm-cam@1800000{ 19: qcom,csiphy@1b0ac00 { 41: qcom,csiphy@1b0b000 { 63: qcom,csid@1b08000 { 87: qcom,csid@1b08400 { 111: qcom,ispif@1b0a000 { 155: qcom,vfe@1b10000 { 212: qcom,jpeg@1b1c000 { 232: qcom,irqrouter@1b00000 { 239: qcom,cpp@1b04000 { 273: cci: qcom,cci@1b0c000 { (there's probably more hidden in magic reg accesses) Konrad