From patchwork Fri Dec 9 09:40:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Milen Mitkov \(Consultant\)" X-Patchwork-Id: 633147 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E6E4C04FDE for ; Fri, 9 Dec 2022 09:41:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229816AbiLIJlM (ORCPT ); Fri, 9 Dec 2022 04:41:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229769AbiLIJlL (ORCPT ); Fri, 9 Dec 2022 04:41:11 -0500 Received: from alexa-out-sd-01.qualcomm.com (alexa-out-sd-01.qualcomm.com [199.106.114.38]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3FE03AC32; Fri, 9 Dec 2022 01:41:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1670578869; x=1702114869; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=CxvSR/db2Xc7mTrpBpDm/K5V05y4jf2T2xhdJB3fW4c=; b=PlGgrJaCsuO4KrS6uu7F86sxQMETjJSJLrQW3+uihLO9t9UGBbJ0r1iw opbbxbLFVaJ7OOMH3fj83NDt61XdW4Kkgb3TfkiPI7oHCtCAV9eRk1byO bu04QgJl0jBt0dKp7PQ5S21KERebonBFjCSjurrrK5Tdno24F0etX+d4O 8=; Received: from unknown (HELO ironmsg04-sd.qualcomm.com) ([10.53.140.144]) by alexa-out-sd-01.qualcomm.com with ESMTP; 09 Dec 2022 01:41:08 -0800 X-QCInternal: smtphost Received: from unknown (HELO nasanex01a.na.qualcomm.com) ([10.52.223.231]) by ironmsg04-sd.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Dec 2022 01:41:08 -0800 Received: from mmitkov.eu.qualcomm.com (10.80.80.8) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Fri, 9 Dec 2022 01:41:04 -0800 From: To: , , , , , CC: , , , , , , , , Milen Mitkov Subject: [PATCH v7 0/4] media: camss: sm8250: Virtual channels support for SM8250 Date: Fri, 9 Dec 2022 11:40:33 +0200 Message-ID: <20221209094037.1148-1-quic_mmitkov@quicinc.com> X-Mailer: git-send-email 2.37.3.windows.1 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nasanex01a.na.qualcomm.com (10.52.223.231) Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Milen Mitkov For v7: - Fix an issue with output state for different versions of the IFE hardware (for platforms different from QRB5, e.g. QRB3). For v6: - Fix for a potential race condition in csid - More detailed description on how to use/test this feature in user-space in the last patch. For v5: - Use entity->use_count instead of s_stream subdev call ret code to check if another instance of the pipeline is running. Prevents an error on 6.1 and up, when stopping one of several simultaneous instances. - flush buffers instead of just returning if the pipeline didn't start. For v4: - fixes the warning reported by the kernel test robot - tiny code change to enable the vc functionality with the partially-applied multistream patches on linux-next (tested on tag:next-20221010) For v3: - setting the sink pad format on the CSID entity will now propagate the format to the source pads to keep the subdev in a valid internal state. - code syntax improvements For v2: - code syntax improvements - The info print for the enabled VCs was demoted to a dbg print. Can be enabled with dynamic debug, e.g.: echo "file drivers/media/platform/qcom/camss/* +p" > /sys/kernel/debug/dynamic_debug/control NOTE: These changes depend on the multistream series, that as of yet is still not merged upstream. However, part of the multistream patches are merged in linux-next (tested on tag:next-20221010), including the patch that introduces the video_device_pipeline_alloc_start() functionality. This allows applying and using this series on linux-next without applying the complete multistream set. The CSID hardware on SM8250 can demux the input data stream into maximum of 4 multiple streams depending on virtual channel (vc) or data type (dt) configuration. Situations in which demuxing is useful: - HDR sensors that produce a 2-frame HDR output, e.g. a light and a dark frame (the setup we used for testing, with the imx412 sensor), or a 3-frame HDR output - light, medium-lit, dark frame. - sensors with additional metadata that is streamed over a different virtual channel/datatype. - sensors that produce frames with multiple resolutions in the same pixel data stream With these changes, the CSID entity has, as it did previously, a single sink port (0), and always exposes 4 source ports (1, 2,3, 4). The virtual channel configuration is determined by which of the source ports are linked to an output VFE line. For example, the link below will configure the CSID driver to enable vc 0 and vc 1: media-ctl -l '"msm_csid0":1->"msm_vfe0_rdi0":0[1]' media-ctl -l '"msm_csid0":2->"msm_vfe0_rdi1":0[1]' which will be demuxed and propagated into /dev/video0 and /dev/video1 respectively. With this, the userspace can use any normal V4L2 client app to start/stop/queue/dequeue from these video nodes. Tested with the yavta app. The format of each RDI channel of the used VFE(s) (msm_vfe0_rdi0, msm_vfe0_rdi1,...) must also be configured explicitly. Note that in order to keep a valid internal subdevice state, setting the sink pad format of the CSID subdevice will propagate this format to the source pads. However, since the CSID hardware can demux the input stream into several streams each of which can be a different format, in that case each source pad's format must be set individually, e.g.: media-ctl -V '"msm_csid0":1[fmt:SRGGB10/3840x2160]' media-ctl -V '"msm_csid0":2[fmt:SRGGB10/960x540]' Milen Mitkov (4): media: camss: sm8250: Virtual channels for CSID media: camss: vfe: Reserve VFE lines on stream start and link to CSID media: camss: vfe-480: Multiple outputs support for SM8250 media: camss: sm8250: Pipeline starting and stopping for multiple virtual channels .../platform/qcom/camss/camss-csid-gen2.c | 54 ++++++++++------ .../media/platform/qcom/camss/camss-csid.c | 44 +++++++++---- .../media/platform/qcom/camss/camss-csid.h | 11 +++- .../media/platform/qcom/camss/camss-vfe-170.c | 4 +- .../media/platform/qcom/camss/camss-vfe-480.c | 61 ++++++++++++------- .../platform/qcom/camss/camss-vfe-gen1.c | 4 +- drivers/media/platform/qcom/camss/camss-vfe.c | 1 + .../media/platform/qcom/camss/camss-video.c | 21 ++++++- drivers/media/platform/qcom/camss/camss.c | 2 +- 9 files changed, 138 insertions(+), 64 deletions(-) Acked-by: Bryan O'Donoghue