[{"id":34833,"web_url":"https://patchwork.libcamera.org/comment/34833/","msgid":"<85ms9dwh7q.fsf@mzamazal-thinkpadp1gen7.tpbc.csb>","date":"2025-07-09T14:51:05","subject":"Re: [PATCH 1/2] libcamera: simple: Detect Bayer pattern change\n\tduring configure()","submitter":{"id":177,"url":"https://patchwork.libcamera.org/api/people/177/","name":"Milan Zamazal","email":"mzamazal@redhat.com"},"content":"Hi Umang,\n\nthank you for the patch.\n\nUmang Jain writes:\n\n> Bayer pattern on the sensor can change while configuring it with the\n> intended capture format. This is due to the transform being applied on\n> the sensor which supports [v/h]flips.\n>\n> During configure(), the simple pipeline handler does not detect any\n> bayer pattern changes that can arise due to the transformations being\n> applied via SimpleCameraData:setupFormats(). In such cases, the video\n> node will be configured in-correctly, without realising the bayer\n> pattern has changed on the sensor, for the given capture format.\n>\n> This patch detects the bayer pattern change after the sensor has\n> been configured and retrieves the corresponding V4L2 pixel format\n> to correctly configure the video node.\n\nThe patches make software ISP working on my RPi 4B but red and blue\nare swapped (tested with `cam -D').\n\n> Signed-off-by: Umang Jain \n> ---\n> src/libcamera/pipeline/simple/simple.cpp | 16 ++++++++++++++--\n> 1 file changed, 14 insertions(+), 2 deletions(-)\n>\n> diff --git a/src/libcamera/pipeline/simple/simple.cpp b/src/libcamera/pipeline/simple/simple.cpp\n> index efb07051..e2a48724 100644\n> --- a/src/libcamera/pipeline/simple/simple.cpp\n> +++ b/src/libcamera/pipeline/simple/simple.cpp\n> @@ -1353,8 +1353,20 @@ int SimplePipelineHandler::configure(Camera *camera, CameraConfiguration *c)\n> \tif (ret < 0)\n> \t\treturn ret;\n> \n> -\t/* Configure the video node. */\n> -\tV4L2PixelFormat videoFormat = video->toV4L2PixelFormat(pipeConfig->captureFormat);\n> +\t/* Configure the video node, taking into account any Bayer pattern change. */\n> +\tV4L2PixelFormat videoFormat;\n> +\tif (format.code == pipeConfig->code) {\n> +\t\tvideoFormat = video->toV4L2PixelFormat(pipeConfig->captureFormat);\n> +\t} else {\n> +\t\t/*\n> +\t\t * Bayer pattern has changed because of the transform that was applied on\n> +\t\t * the sensor. Get the V4L2PixelFormat corresponding to the configured Bayer\n> +\t\t * pattern.\n> +\t\t */\n> +\t\tBayerFormat cfgBayer = BayerFormat::fromPixelFormat(pipeConfig->captureFormat);\n> +\t\tcfgBayer.order = data->sensor_->bayerOrder(config->combinedTransform());\n> +\t\tvideoFormat = cfgBayer.toV4L2PixelFormat();\n> +\t}\n> \n> \tV4L2DeviceFormat captureFormat;\n> \tcaptureFormat.fourcc = videoFormat;","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id E9BC2C0DA4\n\tfor ;\n\tWed, 9 Jul 2025 14:51:14 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 3B63668EED;\n\tWed, 9 Jul 2025 16:51:14 +0200 (CEST)","from us-smtp-delivery-124.mimecast.com\n\t(us-smtp-delivery-124.mimecast.com [170.10.129.124])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 6812368E8A\n\tfor ;\n\tWed, 9 Jul 2025 16:51:12 +0200 (CEST)","from mail-wr1-f69.google.com (mail-wr1-f69.google.com\n\t[209.85.221.69]) by relay.mimecast.com with ESMTP with STARTTLS\n\t(version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n\tus-mta-135-P72d7mHBOdGjPq1I-XLYyA-1; Wed, 09 Jul 2025 10:51:09 -0400","by mail-wr1-f69.google.com with SMTP id\n\tffacd0b85a97d-3b39cc43f15so8342f8f.2\n\tfor ;\n\tWed, 09 Jul 2025 07:51:08 -0700 (PDT)","from mzamazal-thinkpadp1gen7.tpbc.csb\n\t(ip-77-48-47-2.net.vodafone.cz. 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This is due to the transform being applied on\n> > the sensor which supports [v/h]flips.\n> >\n> > During configure(), the simple pipeline handler does not detect any\n> > bayer pattern changes that can arise due to the transformations being\n> > applied via SimpleCameraData:setupFormats(). In such cases, the video\n> > node will be configured in-correctly, without realising the bayer\n> > pattern has changed on the sensor, for the given capture format.\n> >\n> > This patch detects the bayer pattern change after the sensor has\n> > been configured and retrieves the corresponding V4L2 pixel format\n> > to correctly configure the video node.\n> \n> The patches make software ISP working on my RPi 4B but red and blue\n> are swapped (tested with `cam -D').\n\nUsing IMX219 right?\n\nI think that is happening due to the fact this patch did not update the\ncached pipeConfig_, after the flips are applied. So swISP_ is getting\nfed a (outdated)pipeConfig where no flips are applied.\n\n....\nah, but for that to happen, we need to make the cached pipeConfig_ mutable eek!\n\n> \n> > Signed-off-by: Umang Jain \n> > ---\n> > src/libcamera/pipeline/simple/simple.cpp | 16 ++++++++++++++--\n> > 1 file changed, 14 insertions(+), 2 deletions(-)\n> >\n> > diff --git a/src/libcamera/pipeline/simple/simple.cpp b/src/libcamera/pipeline/simple/simple.cpp\n> > index efb07051..e2a48724 100644\n> > --- a/src/libcamera/pipeline/simple/simple.cpp\n> > +++ b/src/libcamera/pipeline/simple/simple.cpp\n> > @@ -1353,8 +1353,20 @@ int SimplePipelineHandler::configure(Camera *camera, CameraConfiguration *c)\n> > \tif (ret < 0)\n> > \t\treturn ret;\n> > \n> > -\t/* Configure the video node. */\n> > -\tV4L2PixelFormat videoFormat = video->toV4L2PixelFormat(pipeConfig->captureFormat);\n> > +\t/* Configure the video node, taking into account any Bayer pattern change. */\n> > +\tV4L2PixelFormat videoFormat;\n> > +\tif (format.code == pipeConfig->code) {\n> > +\t\tvideoFormat = video->toV4L2PixelFormat(pipeConfig->captureFormat);\n> > +\t} else {\n> > +\t\t/*\n> > +\t\t * Bayer pattern has changed because of the transform that was applied on\n> > +\t\t * the sensor. Get the V4L2PixelFormat corresponding to the configured Bayer\n> > +\t\t * pattern.\n> > +\t\t */\n> > +\t\tBayerFormat cfgBayer = BayerFormat::fromPixelFormat(pipeConfig->captureFormat);\n> > +\t\tcfgBayer.order = data->sensor_->bayerOrder(config->combinedTransform());\n> > +\t\tvideoFormat = cfgBayer.toV4L2PixelFormat();\n> > +\t}\n> > \n> > \tV4L2DeviceFormat captureFormat;\n> > \tcaptureFormat.fourcc = videoFormat;\n>","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 5B86CC3237\n\tfor ;\n\tThu, 10 Jul 2025 03:30:24 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 3FAAC68EF7;\n\tThu, 10 Jul 2025 05:30:23 +0200 (CEST)","from fanzine2.igalia.com (fanzine2.igalia.com [213.97.179.56])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 1D85061518\n\tfor ;\n\tThu, 10 Jul 2025 05:30:21 +0200 (CEST)","from [49.36.69.85] (helo=uajain) by fanzine2.igalia.com with\n\tesmtpsa \n\t(Cipher TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256)\n\t(Exim) id 1uZhzH-00ElQk-No; Thu, 10 Jul 2025 05:30:20 +0200"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=igalia.com header.i=@igalia.com\n\theader.b=\"P4dW2PQN\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com;\n\ts=20170329;\n\th=In-Reply-To:Content-Type:MIME-Version:References:Message-ID:\n\tSubject:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding:Content-ID:\n\tContent-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc\n\t:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe:\n\tList-Post:List-Owner:List-Archive;\n\tbh=fXUThxjjEsrfOfFD4za86D8MZEYGCvld1GVr43sPI7c=;\n\tb=P4dW2PQNX0JKqtv/x8RnstiZoM\n\tS0f2GDzWs4wFdDBF6HHPB9X8NtAUDVE+oxQDfKhCdVKXdltoc8wCKOASqcq9EiMpBeQkekVppUYxa\n\t6LuKCpJ8J8xQMfBum31d2ry/udn8CwQnjKb9fBG2SC2TZLbj7vZuUL/KmpbJJhdNrxSg9FS7gogm+\n\tUyXHRVEMULlPDyiJqr2aMtvxZnAVFrtWOVZwRTV1vSWNrgXjpo4BgP/hlM8te7lAytYhGvi2sdfxg\n\tIKFOt8pKwJ8OBbKjkmtUu/tBCo8b+2L2KBVmwcFtpipB0/NCyDziIig4zU24c41uDdNT8WOY9XRHU\n\t4UAdGOSA==;","Date":"Thu, 10 Jul 2025 09:00:23 +0530","From":"Umang Jain ","To":"Milan Zamazal ","Cc":"libcamera-devel@lists.libcamera.org","Subject":"Re: [PATCH 1/2] libcamera: simple: Detect Bayer pattern change\n\tduring configure()","Message-ID":"","References":"<20250709134229.135949-1-uajain@igalia.com>\n\t<20250709134229.135949-2-uajain@igalia.com>\n\t<85ms9dwh7q.fsf@mzamazal-thinkpadp1gen7.tpbc.csb>","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"<85ms9dwh7q.fsf@mzamazal-thinkpadp1gen7.tpbc.csb>","User-Agent":"NeoMutt/20250510-dirty","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}},{"id":34840,"web_url":"https://patchwork.libcamera.org/comment/34840/","msgid":"<85y0swh44q.fsf@mzamazal-thinkpadp1gen7.tpbc.csb>","date":"2025-07-10T07:55:01","subject":"Re: [PATCH 1/2] libcamera: simple: Detect Bayer pattern change\n\tduring configure()","submitter":{"id":177,"url":"https://patchwork.libcamera.org/api/people/177/","name":"Milan Zamazal","email":"mzamazal@redhat.com"},"content":"Umang Jain writes:\n\n> Hi Milan\n>\n> On Wed, Jul 09, 2025 at 04:51:05PM +0200, Milan Zamazal wrote:\n>> Hi Umang,\n>> \n>> thank you for the patch.\n>> \n>> Umang Jain writes:\n>> \n>> > Bayer pattern on the sensor can change while configuring it with the\n>> > intended capture format. This is due to the transform being applied on\n>> > the sensor which supports [v/h]flips.\n>> >\n>> > During configure(), the simple pipeline handler does not detect any\n>> > bayer pattern changes that can arise due to the transformations being\n>> > applied via SimpleCameraData:setupFormats(). In such cases, the video\n>> > node will be configured in-correctly, without realising the bayer\n>> > pattern has changed on the sensor, for the given capture format.\n>> >\n>> > This patch detects the bayer pattern change after the sensor has\n>> > been configured and retrieves the corresponding V4L2 pixel format\n>> > to correctly configure the video node.\n>> \n>> The patches make software ISP working on my RPi 4B but red and blue\n>> are swapped (tested with `cam -D').\n>\n> Using IMX219 right?\n\nRight.\n\n> I think that is happening due to the fact this patch did not update the\n> cached pipeConfig_, after the flips are applied. So swISP_ is getting\n> fed a (outdated)pipeConfig where no flips are applied.\n>\n> ....\n> ah, but for that to happen, we need to make the cached pipeConfig_ mutable eek!\n>\n>> \n>> > Signed-off-by: Umang Jain \n>> > ---\n>> > src/libcamera/pipeline/simple/simple.cpp | 16 ++++++++++++++--\n>> > 1 file changed, 14 insertions(+), 2 deletions(-)\n>> >\n>> > diff --git a/src/libcamera/pipeline/simple/simple.cpp b/src/libcamera/pipeline/simple/simple.cpp\n>> > index efb07051..e2a48724 100644\n>> > --- a/src/libcamera/pipeline/simple/simple.cpp\n>> > +++ b/src/libcamera/pipeline/simple/simple.cpp\n>> > @@ -1353,8 +1353,20 @@ int SimplePipelineHandler::configure(Camera *camera, CameraConfiguration *c)\n>> > \tif (ret < 0)\n>> > \t\treturn ret;\n>> > \n>> > -\t/* Configure the video node. */\n>> > -\tV4L2PixelFormat videoFormat = video->toV4L2PixelFormat(pipeConfig->captureFormat);\n>> > +\t/* Configure the video node, taking into account any Bayer pattern change. */\n>> > +\tV4L2PixelFormat videoFormat;\n>> > +\tif (format.code == pipeConfig->code) {\n>> > +\t\tvideoFormat = video->toV4L2PixelFormat(pipeConfig->captureFormat);\n>> > +\t} else {\n>> > +\t\t/*\n>> > +\t\t * Bayer pattern has changed because of the transform that was applied on\n>> > +\t\t * the sensor. Get the V4L2PixelFormat corresponding to the configured Bayer\n>> > +\t\t * pattern.\n>> > +\t\t */\n>> > +\t\tBayerFormat cfgBayer = BayerFormat::fromPixelFormat(pipeConfig->captureFormat);\n>> > +\t\tcfgBayer.order = data->sensor_->bayerOrder(config->combinedTransform());\n>> > +\t\tvideoFormat = cfgBayer.toV4L2PixelFormat();\n>> > +\t}\n>> > \n>> > \tV4L2DeviceFormat captureFormat;\n>> > \tcaptureFormat.fourcc = videoFormat;\n>>","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id CA603C3237\n\tfor ;\n\tThu, 10 Jul 2025 07:55:11 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id EB81C68EFB;\n\tThu, 10 Jul 2025 09:55:10 +0200 (CEST)","from us-smtp-delivery-124.mimecast.com\n\t(us-smtp-delivery-124.mimecast.com [170.10.129.124])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 3950068EAF\n\tfor ;\n\tThu, 10 Jul 2025 09:55:09 +0200 (CEST)","from mail-ej1-f72.google.com (mail-ej1-f72.google.com\n\t[209.85.218.72]) by relay.mimecast.com with ESMTP with STARTTLS\n\t(version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n\tus-mta-561-nBXMOe3CO3OQntfy6s_3Lg-1; Thu, 10 Jul 2025 03:55:06 -0400","by mail-ej1-f72.google.com with SMTP id\n\ta640c23a62f3a-adb33457610so90228366b.3\n\tfor ;\n\tThu, 10 Jul 2025 00:55:05 -0700 (PDT)","from mzamazal-thinkpadp1gen7.tpbc.csb\n\t(ip-77-48-47-2.net.vodafone.cz. 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