From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 2E9A7384233; Thu, 30 Jul 2026 20:02:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785441737; cv=none; b=izUrtxJnUJrtEO1yy6MHcVI8pDHxQW77j+6jsxMQLiviBHhBT480xrpQdmlTf8Zb0Y0b/TVj5YK9x19GuEldbmW8orKM9ru/xUvwYZfILs/8fnMYqK0COYdO6y2J4vqN3GTE2TUXTi1y2ySx0cObyYlbHAqbyIOHzCPD6mAnyCs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785441737; c=relaxed/simple; bh=I51RoSRfeXhodzhyviCxLakDKoPcWPa9FFUlmYygh3M=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=JDHyJyS7cq4OUzweefUeWCFkl9PzJJQMKjr+85+z+9S4r1kxCnvVYFC4SsYGUI6pqToE5ctCsprBSfWG1J4jKdZEn9eIfm/BIZXkH9q16PTXP/l7ontGvpH57Y9jUq1fUky7x06+vMMfCs2h4zvC92aAZOPHm1wIv/DiDXiHmvo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ENpU42UX; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ENpU42UX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DBC0A1F00A3A; Thu, 30 Jul 2026 20:02:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785441735; bh=81ixOIIxQDz8Y1YeZwzSahmddmhY7vX/kxMbcDdS2JA=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=ENpU42UX/QrHwxkd6mwSnu8qWCjuwEcDTYM68/aC3cM+m1BFOn4gDNf0aIE9USj+n 6GZp+HK+9ijicRGqFXMKnwH5w3hdtHmVfMu5fxXBsuGbrwiR7EmSJIwmWpWUPrHadu F5iXEFIXlzMA/SP09gsqFseJENjMpsfweRqLkK13RRCRDvxQxlD+zO1/TUH8XbSb1o VKKNnn8nwrKH+3uOK4oBz70LlBXjT5GmAm4kernsvDl5woH60mdHxje9qe0ognGWMT A9h81x70TiRrcCcajy4CLnUpXlR3aW3gQmF7Zyw37lkuRK06paT/QYGNWU4PAzye5i FLwXQMNad7wjA== Message-ID: Date: Thu, 30 Jul 2026 21:02:11 +0100 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 v8 01/18] media: iris: Add Gen2 firmware autodetect and fallback To: Dmitry Baryshkov , Vikash Garodia , Abhinav Kumar , Mauro Carvalho Chehab , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Vishnu Reddy Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Dikshita Agarwal References: <20260730-iris-ar50lt-v8-0-6597c08cea6f@oss.qualcomm.com> <9bYftv7DVgZ5cXat1TpH-BGbGGNNRGxKT_mLPEzuMzdy73ZM4aqjhRoTTCXkfT13oEiH4T2RepfvnMA11hWBGw==@protonmail.internalid> <20260730-iris-ar50lt-v8-1-6597c08cea6f@oss.qualcomm.com> From: Bryan O'Donoghue Content-Language: en-GB Autocrypt: addr=bod@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 30/07/2026 16:20, Dmitry Baryshkov wrote: > From: Dikshita Agarwal > > Some Iris platforms support both Gen1 and Gen2 HFI firmware images. > Update the firmware loading logic to handle this generically by > preferring Gen2 when available, while safely falling back to Gen1 > when required. > > The firmware loading logic is updated with the following priority: > 1. Device Tree (`firmware-name`): If specified, load unconditionally. > 2. Gen2 default : If no DT override exists, select the Gen2 firmware > descriptor when present and attempt to load the corresponding > firmware image. > 3. Gen1 Fallback: If loading the Gen2 firmware fails and a Gen1 > descriptor is available, retry with the Gen1 firmware image. > > Loading and generation detection are split into two steps. > iris_load_firmware() applies the priority above and returns the loaded > image together with a candidate descriptor. iris_detect_firmware() then > runs only after qcom_mdt_load() has succeeded and publishes the chosen > descriptor, so the driver commits to a HFI generation only for an image > that has actually been loaded. > > When a platform provides both Gen1 and Gen2 firmware descriptors and the > firmware is loaded via a DT override, the candidate descriptor is only a > default: iris_detect_firmware() inspects the loaded image to pick the > generation, before authentication. It scans the memory populated by > qcom_mdt_load() rather than the request_firmware() blob, so that a split > .mdt image, whose version string lives in the .bNN data segments and not > in the ELF headers, is classified correctly. The firmware is classified > as Gen2 if the QC_IMAGE_VERSION_STRING starts with "vfw" or matches the > "video-firmware.N.M" format with N >= 2. > > If a Gen1 firmware image is detected in this case, the driver switches > to the Gen1 firmware descriptor and associated platform data so that > the correct HFI implementation is used. > > This change makes firmware generation detection platform‑agnostic, > preserves DT overrides, prefers newer Gen2 firmware when available, > and maintains compatibility with platforms that only support Gen1. > > Signed-off-by: Dikshita Agarwal > Co-developed-by: Dmitry Baryshkov > Signed-off-by: Dmitry Baryshkov Reviewed-by: Bryan O'Donoghue