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smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=eD3vegNV; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B797E606A324; Mon, 2 Nov 2026 08:50:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=eD3vegNV Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2D681F000C1; Mon, 2 Nov 2026 08:50:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793609438; bh=QaWYWUrLhUfwC4NyrykAqy2T/OO+U82Y2EmtMkUqbZk=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=eD3vegNVhbx15mhQYNYj1Lbl/xaM6BD1eAxTN9bCnpcWXK9J7fCQGKhkq7ad7ZFs2 El6xYwwcjTqrKVhMoICNoQJbGw5b8hbgvFYhZ29g1kujzgTbvK7acgWruYQ/ZITE3g h5Q5ie2PSEhOzTwirMDCC8SITikqEj90dr5BveB7OLKB41nEyerqOZot9GQZOxNN2U EdUuyip8aow+qEv+zTiMZK50CZIN4sabSA8i1mnwrHsP5OYaDSC+36Gq68v3r4RhSu xJA/PH0M4G+Ht2Z1ZcKs+ZZRkayCjgjdwXBNTZSZ7J8DeEP+plHAwkeBSvUmp1UHuy u7REK5fRtjEVQ== Message-ID: Date: Mon, 2 Nov 2026 09:50:24 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 21/25] accel/qda: Add Audio protection domain attach and its remote heap To: Ekansh Gupta , Oded Gabbay , Jonathan Corbet , Shuah Khan , Randy Dunlap , Srinivas Kandagatla , Arnd Bergmann , Greg Kroah-Hartman , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= , Philipp Stanner , dmitry.baryshkov@oss.qualcomm.com, andersson@kernel.org, rob.clark@oss.qualcomm.com, jgg@ziepe.ca Cc: lingtong@qti.qualcomm.com, cacar@qti.qualcomm.com, sandheep@qti.qualcomm.com, Bharath Kumar , Chenna Kesava Raju , dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, Bharath Kumar , Chenna Kesava Raju , Ekansh Gupta References: <20261102-v4-v4-0-88f2f24a5f0b@qti.qualcomm.com> <20261102-v4-v4-21-88f2f24a5f0b@qti.qualcomm.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 01/11/2026 23:21, Ekansh Gupta wrote: > > +/* > + * The Audio PD keeps the remote heap across daemon restarts, so only the first > + * attach on a device hands it to the DSP. The lock is held across the attach > + * so that a concurrent one cannot skip the heap while the first is still in > + * flight, and the flag is set only once the DSP has accepted it. > + */ > +static int qda_attach_audio_pd(struct qda_session *session, struct drm_qda_remote_attach *args) > +{ > + struct qda_dev *qdev = session->qda_dev; > + struct qda_static_pd_args sargs = {}; > + char *name; > + int err; > + > + if (strcmp(qdev->dsp_name, "adsp") || !qdev->remote_heap_size) That's value from DTB, so where did you document the ABI? I see such undocumented ABI in multiple places. Usually requirement would be to document it, but not label. Why label 'ADSP' is not correct? Why "Audio DSP" would not be correct? Drop all this label dependency, completely (and do not introduce other names, like node name). Best regards, Krzysztof