From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 6787536F419 for ; Mon, 2 Mar 2026 08:43:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772441018; cv=none; b=AyGKYOSDFrCNC/Ejty0i4pMoZYtMYRRRTqbmIimoIDtD/uH4p6cpBa9nzqLwW76QxMZbRv7qPIgD6tjKxYxyy3cywHKWCbob+RxsLm+nPj8T1XdpnsTNyY6JK3hg76u9gSore+z4IsXY/Hlvz6MrZbR99VHcrdDi3K31Eo8qTKE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772441018; c=relaxed/simple; bh=/xZ2osG6NIrmnyZ+TWhCavfR/+FAn/7RvAjDCbyOXRQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=mm+aimugpRgf4YwACipg7bq64xjsnu/NbriOPE6BbHAbu36I5FTIxO5JeStG+gxuY7mNIpnl+9w/7QoQ8eVyxwGQSDTBCLH2TmWWeYsW6ean20CS6HJO0BPUh01qCmgU8yxPecWp/dGM7Qf5zl3UJzVbKEELfqjkSXGFHaYPzWo= 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=E6FZQn/V; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=SQr73Kov; arc=none smtp.client-ip=205.220.180.131 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="E6FZQn/V"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="SQr73Kov" Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 62285oQ81968412 for ; Mon, 2 Mar 2026 08:43:36 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= kzhcGz9kiSv/N4brhbDMgmBjGdF9z8YyVnAXdkdzS5I=; b=E6FZQn/V+eAhBHn0 8tH6CLUWeLzRwHKNoHRBXFhESTg8oppg4/shnlBIJSpK+UUNYJAXzfZDV/Xew3cn gxxUjFZDbR2tQM7WKMRb0DQ5YsZ3IetF4VzbhlOYem8u3zzwysF/7B3IB19HrAPK ws+FiOiFDsF3Q4K/mpYNHAUf9JkNiPHXP10RACAUFmWye2LgYHeVX3Mh9FGZbirm TplyKHUGAQNGq1kLz6AXSsZlDeaY4QjdkdTLnyTxJmMydlc93l7LSXqvo22pHurH V54k0ahuW39O9Ba6kfFlEUEaoRsTlOo7SQD+XQZAKeOlFk6xUqJo0+N5OEtXWA0p 1mENwQ== Received: from mail-pl1-f197.google.com (mail-pl1-f197.google.com [209.85.214.197]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4ckshkvrp7-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Mon, 02 Mar 2026 08:43:36 +0000 (GMT) Received: by mail-pl1-f197.google.com with SMTP id d9443c01a7336-2ae48a21d12so8404085ad.1 for ; Mon, 02 Mar 2026 00:43:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1772441015; x=1773045815; darn=vger.kernel.org; h=content-transfer-encoding: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; bh=kzhcGz9kiSv/N4brhbDMgmBjGdF9z8YyVnAXdkdzS5I=; b=SQr73KovA7fHWoQANAgttk3PDCptr59qoNUu6qCfuHZNIIyWDWAmO2dLuD4UBNUMp9 YgCQm0YLpHjA3ThD/gv3ZF8UOfe7i0hdHaGcZ7a8GYXdhOBZY8ETI/KPpOtPXckgMQnJ nuxXiZcl6G1XRaRQLV2TVIEp4b6MBnVwaqnqg3efXfhYvMtiB8XfaFBx4Spfl+erxfwd 1DqqyKjq9G8wYHsI+tgfh3b72y3HVfb4EhyJayBecaaf+l7I5FhyC+LeiVnMhgIJmT0j Tbv75qJ3WOw5J0YNmskK3st4keUiEVVoj7iyijsoEuqsMVSULPMftOE6Sqc2Xc+vJSKR QYCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772441015; x=1773045815; h=content-transfer-encoding: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; bh=kzhcGz9kiSv/N4brhbDMgmBjGdF9z8YyVnAXdkdzS5I=; b=MUkOzWD8BaGtXabk3xF3vK9K9NGGV06Il4i/vFD3UweHf6l7+3Nv0Jzziw+7EhrmmK TgurNJIOwM2LXnfRdll9IBtiLlm2+kbCK86089R9RH7a9RUEf9yo/J4zTD7GfC+GrUwK qpss3+xuC/RIjL9AkwMgtJ+P1EnApnxDMSZT8Cm6FjgbxEd1HkUoJognfwsrM8dp2p4/ J8o8vEELpJx3+975BC+fsanaD0lAt4j/Mke8bQAUFi97MQBQciHrBHUZ9wCVDpvJfh9C 9fqNam2E/anOgwiLhuGH832yK+9MFlfw3QNNNVEZLUa5GWLrNkZBxSQNGt8l8ywqShWB e1oQ== X-Forwarded-Encrypted: i=1; AJvYcCX7ngQJEKqPuwQCiAp+4sO7/FKTpl/Z03+wjF6Wicjo5BzB7KA6IDebyLdmvIMn5O1p7T+dyTe+JV3BjNE=@vger.kernel.org X-Gm-Message-State: AOJu0Yw/L08VkIlCJ/8GQWli00ESeDOUC/drCMgJdfw68G/s/6gvJLC9 j3mcbwmQXoC2AdjyofV+04x3X+gU+TVDGUNE5kUYBfsMdHdxFTUvYOwtDsy179QcOI9WHkUmjcl JMXYeUcorW/LHsk1SL4v6Vqc+0ZLx6ZsvGRPXqbc/cJt8tBYpdK/dJJDrlDSr1XqMm+c= X-Gm-Gg: ATEYQzzMFRsePi+DYnOS90TUEtCJEWe8/iiELPXGkv93WxX5qLlSPoGqOSQQGfZSv71 IYy3qbyB++LrQDFc3zuD+glvlBlo6MrvRsAayJsOxPn/yJN8JUBQVnTNs1mtwFJJO1xYuO5FNaM 5clHkhwXVI4Yoy9wW0BDwN5Aajo6cau9s6vatZewaHbvDziV0zSOjs/rRecbGgC4y/ySv+zdT7V 2rlcr5MXrJvq9/1gM+d/CYSNgwtdEGyHdDFi3ExRWBRwsHoChwzzfaANa4kGXnxM5Q2s8foKc55 MyyiHfL9XvXdWAqE6646N5DVj3CtuQLfJiGQzo7ZMPAePGfZevWEILgLDLzL0yn3beKv3SiQ7iD biIQNKPje84UUFnNNH1NePYO4sGcHMneFNerLWtedrqjO292mhg== X-Received: by 2002:a17:903:2352:b0:2ae:4a4e:1e25 with SMTP id d9443c01a7336-2ae4a4e1f37mr39247905ad.25.1772441015345; Mon, 02 Mar 2026 00:43:35 -0800 (PST) X-Received: by 2002:a17:903:2352:b0:2ae:4a4e:1e25 with SMTP id d9443c01a7336-2ae4a4e1f37mr39247665ad.25.1772441014848; Mon, 02 Mar 2026 00:43:34 -0800 (PST) Received: from [10.206.99.28] ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ae5276097asm23725485ad.34.2026.03.02.00.43.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 02 Mar 2026 00:43:34 -0800 (PST) Message-ID: <9eb6d9a3-268b-4dee-9fab-ec59322e8a3b@oss.qualcomm.com> Date: Mon, 2 Mar 2026 14:13:26 +0530 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 RFC 00/18] accel/qda: Introduce Qualcomm DSP Accelerator driver To: Trilok Soni , Oded Gabbay , Jonathan Corbet , Shuah Khan , Joerg Roedel , Will Deacon , Robin Murphy , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= Cc: dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, iommu@lists.linux.dev, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, Srinivas Kandagatla , Dmitry Baryshkov , Bharath Kumar , Chenna Kesava Raju References: <20260224-qda-firstpost-v1-0-fe46a9c1a046@oss.qualcomm.com> Content-Language: en-US From: Ekansh Gupta In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAyMDA3NiBTYWx0ZWRfX5SyCXMsppoTz sgaciOHvgWTrIICdhdvZOnu9KkgFJYuRIW3sfHHZNbti0WIgwmQaqlqzGi/FJFCYz0Jjg2uyWpT A0VCn8gBZOFBXXyPBOphIwo2WVGCl9rqqIwl9y6y/sRZNX/u9ipdxsp8YolQvqqEWNS5pLDhegA WBi7tSZKpaN3Y7HtQbD9h+gS+eEDY4kxySqzbhtC7vT/+TX1QjgpjHUcg0RQUvP7dsU9xXuZ60j TaufIQYFXFO5QwAvVLlxX6EKPYzwzcj0YrJcvNiQQ0idTuhAR4l/wAd3lbXA4OpfsSaj30Gz+/z BVRydf3g88RNfwYF6g/XhefIW826FXdwU5+3wJiNkBCp9fcqjDZQ/oH/DNKBAvBNCS6UktTH7IF TJ7rXp5c7ZR1xOezA5H1VNGbNfcoGM20EsZm/QxUuBJo2Wd6V7DgXiUGKEcEfFEZYSF/iVxkwkH 3uMNNMIwpR62+6jOAQA== X-Proofpoint-ORIG-GUID: nxpXJ5ucboFMwgW23bqUPPBEkfhTdpWB X-Authority-Analysis: v=2.4 cv=EvbfbCcA c=1 sm=1 tr=0 ts=69a54db8 cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=AnEmtbbmQWdTvrL9bUcA:9 a=QEXdDO2ut3YA:10 a=0lgtpPvCYYIA:10 a=1OuFwYUASf3TG4hYMiVC:22 X-Proofpoint-GUID: nxpXJ5ucboFMwgW23bqUPPBEkfhTdpWB X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-02_02,2026-02-27_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 bulkscore=0 spamscore=0 lowpriorityscore=0 priorityscore=1501 malwarescore=0 adultscore=0 impostorscore=0 clxscore=1015 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603020076 On 2/24/2026 9:09 AM, Trilok Soni wrote: > On 2/23/2026 11:08 AM, Ekansh Gupta wrote: >> * Userspace Interface: While the driver provides a new DRM-based UAPI, >> the underlying FastRPC protocol and DSP firmware interface remain >> compatible. This ensures that DSP firmware and libraries continue to >> work without modification. > > This is not very clear and it is not explained properly in the 1st patch > where you document this driver. It doesn't talk about how older > UAPI based application will still work without any change > or recompilation. I prefer the same old binary to work w/ the new > DRM based interface without any changes (I don't know how that will be possible) > OR if recompilation + linking is needed then you need to provide the wrapper library. I'll add more details for this based on the discussion for compat driver. > > ---Trilok Soni