From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BF28EC54FB9 for ; Tue, 21 Nov 2023 09:22:25 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4SZJmw39XZz3vdb for ; Tue, 21 Nov 2023 20:22:24 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=145.40.68.75; helo=ams.source.kernel.org; envelope-from=srs0=bnfp=hc=xs4all.nl=hverkuil@kernel.org; receiver=lists.ozlabs.org) Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4SZJkb3GPSz3cW1 for ; Tue, 21 Nov 2023 20:20:23 +1100 (AEDT) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by ams.source.kernel.org (Postfix) with ESMTP id CF2A0B81F80; Tue, 21 Nov 2023 09:20:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B6041C433C7; Tue, 21 Nov 2023 09:20:12 +0000 (UTC) Message-ID: <0026a04d-8a04-4eeb-9f03-c68be6da5ec5@xs4all.nl> Date: Tue, 21 Nov 2023 10:20:10 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v10 13/14] media: imx-asrc: Add memory to memory driver Content-Language: en-US, nl To: Shengjiu Wang , sakari.ailus@iki.fi, tfiga@chromium.org, m.szyprowski@samsung.com, mchehab@kernel.org, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, shengjiu.wang@gmail.com, Xiubo.Lee@gmail.com, festevam@gmail.com, nicoleotsuka@gmail.com, lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz, tiwai@suse.com, alsa-devel@alsa-project.org, linuxppc-dev@lists.ozlabs.org References: <1700552255-5364-1-git-send-email-shengjiu.wang@nxp.com> <1700552255-5364-14-git-send-email-shengjiu.wang@nxp.com> From: Hans Verkuil Autocrypt: addr=hverkuil@xs4all.nl; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 21/11/2023 08:37, Shengjiu Wang wrote: > Implement the ASRC memory to memory function using > the v4l2 framework, user can use this function with > v4l2 ioctl interface. > > User send the output and capture buffer to driver and > driver store the converted data to the capture buffer. > > This feature can be shared by ASRC and EASRC drivers > > Signed-off-by: Shengjiu Wang > --- > drivers/media/platform/nxp/Kconfig | 13 + > drivers/media/platform/nxp/Makefile | 1 + > drivers/media/platform/nxp/imx-asrc.c | 1264 +++++++++++++++++++++++++ > 3 files changed, 1278 insertions(+) > create mode 100644 drivers/media/platform/nxp/imx-asrc.c > > +static const struct v4l2_ctrl_config asrc_src_rate_off_control = { > + .ops = &asrc_m2m_ctrl_ops, > + .id = V4L2_CID_M2M_AUDIO_SOURCE_RATE_OFFSET, > + .name = "Audio Source Sample Rate Offset", > + .type = V4L2_CTRL_TYPE_INTEGER64, Do you need this to be INTEGER64? If the actual number of bits of the fixed point value that the hardware uses fits in 32 bits, then you can just use the INTEGER type. > + .min = 0xFFFFFF0000000000, > + .max = 0x7fffffffff, > + .def = 0, > + .step = 1, > + .flags = V4L2_CTRL_FLAG_UPDATE, > + .fraction_bits = 32, Can't you use the actual number of fraction bits that the hardware uses? I can't imagine that it is actually 32 bits, it is almost certainly less. I do think that we need a helper function to fill in the min/max values. Regards, Hans > +}; > + > +static const struct v4l2_ctrl_config asrc_dst_rate_off_control = { > + .ops = &asrc_m2m_ctrl_ops, > + .id = V4L2_CID_M2M_AUDIO_DEST_RATE_OFFSET, > + .name = "Audio Dest Sample Rate Offset", > + .type = V4L2_CTRL_TYPE_INTEGER64, > + .min = 0xFFFFFF0000000000, > + .max = 0x7fffffffff, > + .def = 0, > + .step = 1, > + .flags = V4L2_CTRL_FLAG_UPDATE, > + .fraction_bits = 32, > +};