{"id":8509,"url":"https://patchwork.libcamera.org/api/patches/8509/?format=json","web_url":"https://patchwork.libcamera.org/patch/8509/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20200629163347.3760354-1-niklas.soderlund@ragnatech.se>","date":"2020-06-29T16:33:47","name":"[libcamera-devel] libcamera: raspberrypi: Document vc_sm_cma pointer sharing with IPA","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"7340e82237074509c6f12d4dc2bfbf7b9fbc2f61","submitter":{"id":5,"url":"https://patchwork.libcamera.org/api/people/5/?format=json","name":"Niklas Söderlund","email":"niklas.soderlund@ragnatech.se"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/8509/mbox/","series":[{"id":1059,"url":"https://patchwork.libcamera.org/api/series/1059/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=1059","date":"2020-06-29T16:33:47","name":"[libcamera-devel] libcamera: raspberrypi: Document vc_sm_cma pointer sharing with IPA","version":1,"mbox":"https://patchwork.libcamera.org/series/1059/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/8509/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/8509/checks/","tags":{},"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 C78E9BF415\n\tfor ;\n\tMon, 29 Jun 2020 16:33:53 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 6E68F609DB;\n\tMon, 29 Jun 2020 18:33:53 +0200 (CEST)","from bin-mail-out-06.binero.net (bin-mail-out-06.binero.net\n\t[195.74.38.229])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 191DE603B1\n\tfor ;\n\tMon, 29 Jun 2020 18:33:52 +0200 (CEST)","from bismarck.berto.se (p4fca2eca.dip0.t-ipconnect.de\n\t[79.202.46.202]) by bin-vsp-out-03.atm.binero.net (Halon) with ESMTPA\n\tid 39748df4-ba26-11ea-86ee-0050569116f7;\n\tMon, 29 Jun 2020 18:33:14 +0200 (CEST)"],"X-Halon-ID":"39748df4-ba26-11ea-86ee-0050569116f7","Authorized-sender":"niklas@soderlund.pp.se","From":"=?utf-8?q?Niklas_S=C3=B6derlund?= ","To":"libcamera-devel@lists.libcamera.org","Date":"Mon, 29 Jun 2020 18:33:47 +0200","Message-Id":"<20200629163347.3760354-1-niklas.soderlund@ragnatech.se>","X-Mailer":"git-send-email 2.27.0","MIME-Version":"1.0","Subject":"[libcamera-devel] [PATCH] libcamera: raspberrypi: Document\n\tvc_sm_cma pointer sharing with IPA","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","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Sharing a pointer with the IPA is fragile as it will not work with all\nIPC mechanisms. Document that it's a temporary workaround that should be\nreworked.\n\nSigned-off-by: Niklas Söderlund \n---\n src/libcamera/pipeline/raspberrypi/raspberrypi.cpp | 4 ++++\n 1 file changed, 4 insertions(+)","diff":"diff --git a/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp b/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp\nindex 9d887b706c3f9670..6d7143162f0645bb 100644\n--- a/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp\n+++ b/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp\n@@ -1014,6 +1014,10 @@ int PipelineHandlerRPi::configureIPA(Camera *camera)\n \t\t/*\n \t\t * The vcsm allocation will always be in the memory region\n \t\t * < 32-bits to allow Videocore to access the memory.\n+\t\t *\n+\t\t * \\todo Sending a pointer to the IPA is a workaround for\n+\t\t * vc_sm_cma not yet supporting dmabuf. This is fragile and\n+\t\t * should be reworked as soon as vc_sm_cma permits.\n \t\t */\n \t\tIPAOperationData op;\n \t\top.operation = RPI_IPA_EVENT_LS_TABLE_ALLOCATION;\n","prefixes":["libcamera-devel"]}