{"id":3385,"url":"https://patchwork.libcamera.org/api/patches/3385/?format=json","web_url":"https://patchwork.libcamera.org/patch/3385/","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":"<20200404004438.17992-9-laurent.pinchart@ideasonboard.com>","date":"2020-04-04T00:44:35","name":"[libcamera-devel,v4,08/11] libcamera: v4l2_videodevice: Map V4L2_PIX_FMT_GREY to DRM FourCC","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"997dd83e263f9eb7e3ec00bde0d7b51037bfbf88","submitter":{"id":2,"url":"https://patchwork.libcamera.org/api/people/2/?format=json","name":"Laurent Pinchart","email":"laurent.pinchart@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/3385/mbox/","series":[{"id":796,"url":"https://patchwork.libcamera.org/api/series/796/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=796","date":"2020-04-04T00:44:27","name":"Simple pipeline handler","version":4,"mbox":"https://patchwork.libcamera.org/series/796/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/3385/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/3385/checks/","tags":{},"headers":{"Return-Path":"","Received":["from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id E7A61629B9\n\tfor ;\n\tSat, 4 Apr 2020 02:44:55 +0200 (CEST)","from pendragon.bb.dnainternet.fi (81-175-216-236.bb.dnainternet.fi\n\t[81.175.216.236])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 4ACA313C7;\n\tSat, 4 Apr 2020 02:44:55 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key; \n\tunprotected) header.d=ideasonboard.com\n\theader.i=@ideasonboard.com\n\theader.b=\"IHUoYTgg\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1585961095;\n\tbh=eojVJlZ6geJjqQh0s1X8+sYEFg1dITg5+xxKxPU+w/M=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=IHUoYTggU3jvHHK42b8cs4EPOTOvVlKdsulQ2eVYjp913nRwPRSAQYy3kKQepszjd\n\tp6Nf0cSwX7RuZjHOJow9etqgw7vRX8mm6J3mESRvbXY/AY+cOPyx0qkyZwDBnKAv2D\n\t2Z/QaUV95+2VPlP/AAaZVRxjygfB6IyJnWo8dlH4=","From":"Laurent Pinchart ","To":"libcamera-devel@lists.libcamera.org","Cc":"Martijn Braam ,\n\tBenjamin GAIGNARD ,\n\tAndrey Konovalov ","Date":"Sat, 4 Apr 2020 03:44:35 +0300","Message-Id":"<20200404004438.17992-9-laurent.pinchart@ideasonboard.com>","X-Mailer":"git-send-email 2.24.1","In-Reply-To":"<20200404004438.17992-1-laurent.pinchart@ideasonboard.com>","References":"<20200404004438.17992-1-laurent.pinchart@ideasonboard.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH v4 08/11] libcamera: v4l2_videodevice: Map\n\tV4L2_PIX_FMT_GREY to DRM FourCC","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","X-List-Received-Date":"Sat, 04 Apr 2020 00:44:56 -0000"},"content":"DRM has a format for 8-bit greyscale data, DRM_FORMAT_R8. Despite the\n'R' name, which comes from GL/Vulkan to mean single-channel data, the\nformat maps to greyscale for display. We can thus map it to\nV4L2_PIX_FMT_GREY.\n\nSigned-off-by: Laurent Pinchart \n---\nChanges since v2:\n\n- Rebase on top of PixelFormat class\n---\n src/libcamera/v4l2_videodevice.cpp | 9 ++++++++-\n 1 file changed, 8 insertions(+), 1 deletion(-)","diff":"diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp\nindex 5208e5a47148..437e771d7fe4 100644\n--- a/src/libcamera/v4l2_videodevice.cpp\n+++ b/src/libcamera/v4l2_videodevice.cpp\n@@ -1699,12 +1699,15 @@ PixelFormat V4L2VideoDevice::toPixelFormat(V4L2PixelFormat v4l2Fourcc)\n \tcase V4L2_PIX_FMT_NV21M:\n \t\treturn PixelFormat(DRM_FORMAT_NV21);\n \n+\t/* Greyscale formats. */\n+\tcase V4L2_PIX_FMT_GREY:\n+\t\treturn PixelFormat(DRM_FORMAT_R8);\n+\n \t/* Compressed formats. */\n \tcase V4L2_PIX_FMT_MJPEG:\n \t\treturn PixelFormat(DRM_FORMAT_MJPEG);\n \n \t/* V4L2 formats not yet supported by DRM. */\n-\tcase V4L2_PIX_FMT_GREY:\n \tdefault:\n \t\t/*\n \t\t * \\todo We can't use LOG() in a static method of a Loggable\n@@ -1790,6 +1793,10 @@ V4L2PixelFormat V4L2VideoDevice::toV4L2PixelFormat(const PixelFormat &pixelForma\n \tcase DRM_FORMAT_NV21:\n \t\treturn V4L2PixelFormat(V4L2_PIX_FMT_NV21);\n \n+\t/* Greyscale formats. */\n+\tcase DRM_FORMAT_R8:\n+\t\treturn V4L2PixelFormat(V4L2_PIX_FMT_GREY);\n+\n \t/* Compressed formats. */\n \tcase DRM_FORMAT_MJPEG:\n \t\treturn V4L2PixelFormat(V4L2_PIX_FMT_MJPEG);\n","prefixes":["libcamera-devel","v4","08/11"]}