From patchwork Mon Jul 8 10:27:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 811662 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 2F6CB7581F for ; Mon, 8 Jul 2024 10:28:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720434503; cv=none; b=nwvErcK3eXz3EKB21PfiJ8mA3Or4IGLS1MnsbjqNzxJehnjOK0NowkJ+d07Ye1xjxQkQAir+2fPbr/UURr/NfSrUQgzBDCSiFLicyYnPxg9NyYyvj+2dHlstBDZ4cUml6gWHLXexh7k5omw6FBs846NUH/losWB1pSIusg0qRxQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720434503; c=relaxed/simple; bh=bW0HhvJ6fjIVZGMwESxXbWyXwStxLT4Eh5m7lEBuMmk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=fpaR3+tigNShL9WpqrQLwlO4pmhRfdRtxwjS2IXzBmtypMeMHzUiI5hzDcuuVzRImeNSwpVjLYY5jJ4dzOaxgEpX/DM/sn7wgOd378KbsyJdTJ2JScDqwvg1mRi4xS6Ho/jg5L/CtatAkrhze5u2gYNlrtgTvjt9NQJxv2IvNlc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=QSKzHKWH; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="QSKzHKWH" Received: from ideasonboard.com (mob-5-90-59-142.net.vodafone.it [5.90.59.142]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 2ABD64C9; Mon, 8 Jul 2024 12:27:40 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1720434468; bh=bW0HhvJ6fjIVZGMwESxXbWyXwStxLT4Eh5m7lEBuMmk=; h=From:To:Cc:Subject:Date:From; b=QSKzHKWHiY+Um0qRabiLRt+o5j/Ln6tmtoXZR24T0MP0NRIESsCHT8UCQN60Lgxs0 Frig0a7bgfJXqyGLHw5cTtXCrDiEwdZYOh6yTFZ9KRr/o6fdtSN3TtY4xJAa1fupR6 sEgw+VJFa5NYnTUUAEd80GtvEB5hCDnqd/L5R+LY= From: Jacopo Mondi To: Linux Media Mailing List Cc: Jacopo Mondi , Laurent Pinchart , Sakari Ailus , Hans Verkuil , Stefan Klug , Paul Elder , Daniel Scally , Kieran Bingham , Umang Jain , Dafna Hirschfeld , Mauro Carvalho Chehab , Heiko Stuebner Subject: [PATCH v6 0/7] media: rkisp1: Implement support for extensible parameters Date: Mon, 8 Jul 2024 12:27:51 +0200 Message-ID: <20240708102759.53297-1-jacopo.mondi@ideasonboard.com> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 v5->v6: - Collect [v5.2 6/7] from Laurent - Collect Paul's tags - Add extra validation for unexpected data after the payload end as suggested by Sakari v4->v5: - Refine validation of the ext params buffer following Laurent's suggestion - perform memcpy of the parameters buffer after sizes validation v3->v4: - Introduce 'union rkisp1_ext_params_config' to avoid casts in the block handlers v2->v3: - Address Laurent's comments on the uAPI: - rename $block_config with just 'config' - reduce header size - rename a few fields/blocks - Address Laurent's comment on the params node: - Use the plane payload for memcpy() and buffer validation - drop buf_out_validate() and use buf_prepare() only - validate the total buffer size against the buffer payload - use const pointers where possible v1->v2: - re-order patches to introduce parameters buffer caching for the existing "fixed" format before introducing the "extensible" format - align all structures to 64-bit boundaries in the uAPI - remove NO_CHANGE enablement state and cache a bitmask of enabled blocks - address review comments in documentation The VeriSilicon ISP8000 IP, supported through the rkisp1 driver in the Linux kernel, is integrated in several SoCs from different vendors. Different revisions of the IP differ in the number of supported features and in the register space location assigned to specific ISP blocks. The current configuration parameters format, defined in include/uapi/linux/rkisp1-config.h is realized by a C structure (struct rkisp1_params_cfg) which wraps other structures that allows to configure specific ISP blocks. The layout of the parameters buffer is part of the Linux kernel uAPI and can hardly be extended or modified to adapt it to different revisions of the same IP. This series proposes the introduction of a new parameters format for the RkISP1 (without dropping support for the existing one) which is designed with the goals of being: 1) versioned: can be changed without breaking existing applications 2) extensible: new blocks and parameters can be added without breaking the uABI To do so, a new 'struct rkisp1_ext_params_cfg' type is introduced. It wraps an header and a data buffer, which userspace fills with configuration blocks for each ISP block it intends to configure. The parameters buffer is thus of different effective sizes, depending on the number of blocks userspace intends to configure. The kernel driver parses the data block and decides, based on the versioning number and the platform it operates on, how to handle each block. The parameters format is very similar to the parameters format implemented in the in-review Mali C55 ISP driver [1] CI pipeline [2] [1] https://lore.kernel.org/linux-media/20240529152858.183799-15-dan.scally@ideasonboard.com/ [2] https://gitlab.freedesktop.org/linux-media/users/jmondi/-/pipelines/1219454 Jacopo Mondi (7): uapi: rkisp1-config: Add extensible parameters format uapi: videodev2: Add V4L2_META_FMT_RK_ISP1_EXT_PARAMS media: rkisp1: Add struct rkisp1_params_buffer media: rkisp1: Copy the parameters buffer media: rkisp1: Cache the currently active format media: rkisp1: Implement extensible params support media: rkisp1: Implement s_fmt/try_fmt Documentation/admin-guide/media/rkisp1.rst | 11 +- .../media/v4l/metafmt-rkisp1.rst | 57 +- .../platform/rockchip/rkisp1/rkisp1-common.h | 31 +- .../platform/rockchip/rkisp1/rkisp1-params.c | 768 ++++++++++++++++-- drivers/media/v4l2-core/v4l2-ioctl.c | 1 + include/uapi/linux/rkisp1-config.h | 489 +++++++++++ include/uapi/linux/videodev2.h | 1 + 7 files changed, 1289 insertions(+), 69 deletions(-) --- 2.45.2