[{"id":13771,"web_url":"https://patchwork.libcamera.org/comment/13771/","msgid":"<92627993-2752-4d43-ebdd-e9e7a332add6@ideasonboard.com>","date":"2020-11-18T11:42:17","subject":"Re: [libcamera-devel] [PATCH v1] libcamera: v4l2_subdev: update\n\tstruct description","submitter":{"id":4,"url":"https://patchwork.libcamera.org/api/people/4/","name":"Kieran Bingham","email":"kieran.bingham@ideasonboard.com"},"content":"Hi Sebastian,\n\nOn 18/11/2020 11:26, Sebastian Fricke wrote:\n> The described documents were moved from 4.15 -> 4.13.\n\nI wonder if there's a better way for us to link to those references\nwithout them always becoming stale. Most likely not - they'll always\nhave updates, and there's no permalink style urls.\n\n> s/the fourcc code that identify the format/the fourcc code that identifies the format/\n> \n> Signed-off-by: Sebastian Fricke <sebastian.fricke.linux@gmail.com>\n\nReviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>\n\n> ---\n>  src/libcamera/v4l2_subdevice.cpp | 6 +++---\n>  1 file changed, 3 insertions(+), 3 deletions(-)\n> \n> diff --git a/src/libcamera/v4l2_subdevice.cpp b/src/libcamera/v4l2_subdevice.cpp\n> index 85d00c2..0860c28 100644\n> --- a/src/libcamera/v4l2_subdevice.cpp\n> +++ b/src/libcamera/v4l2_subdevice.cpp\n> @@ -141,11 +141,11 @@ const std::map<uint32_t, V4L2SubdeviceFormatInfo> formatInfoMap = {\n>   * The format of images when transported on physical interconnections is known\n>   * as the \"media bus format\", and it is identified by a resolution and a pixel\n>   * format identification code, known as the \"media bus code\", not to be confused\n> - * with the fourcc code that identify the format of images when stored in memory\n> + * with the fourcc code that identifies the format of images when stored in memory\n>   * (see V4L2VideoDevice::V4L2DeviceFormat).\n>   *\n>   * Media Bus formats supported by the V4L2 APIs are described in Section\n> - * 4.15.3.4.1 of the \"Part I - Video for Linux API\" chapter of the \"Linux Media\n> + * 4.13.3.4.1 of the \"Part I - Video for Linux API\" chapter of the \"Linux Media\n>   * Infrastructure userspace API\", part of the Linux kernel documentation.\n>   *\n>   * Image media bus formats are properties of the subdev pads.  When images are\n> @@ -154,7 +154,7 @@ const std::map<uint32_t, V4L2SubdeviceFormatInfo> formatInfoMap = {\n>   * underlying driver format matching criteria) in order to prepare for a\n>   * successful streaming operation. For a more detailed description of the image\n>   * format negotiation process when performed between V4L2 subdevices, refer to\n> - * Section 4.15.3.1 of the above mentioned Linux kernel documentation section.\n> + * Section 4.13.3.1 of the above mentioned Linux kernel documentation section.\n>   */\n>  \n>  /**\n>","headers":{"Return-Path":"<libcamera-devel-bounces@lists.libcamera.org>","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 BC0B1BE08A\n\tfor <parsemail@patchwork.libcamera.org>;\n\tWed, 18 Nov 2020 11:42:22 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 19E0D6156B;\n\tWed, 18 Nov 2020 12:42:22 +0100 (CET)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 7820861565\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tWed, 18 Nov 2020 12:42:20 +0100 (CET)","from [192.168.0.20]\n\t(cpc89244-aztw30-2-0-cust3082.18-1.cable.virginm.net [86.31.172.11])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id EA78A9BF;\n\tWed, 18 Nov 2020 12:42:19 +0100 (CET)"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"QwKB2c4Z\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1605699740;\n\tbh=gWH73XPObX4sz7If3aSrKNOxKS08m1v/95tz+yvLVyc=;\n\th=Reply-To:Subject:To:References:From:Date:In-Reply-To:From;\n\tb=QwKB2c4Z48+fnV2AY11RIAbfyFSh+F1DhHO0qSan2n3HLVzCJZR3VCvHXpiQ5sfXW\n\tCQjTafWCnuhD3XVH0Ttre333pWtvAol1W3G3LkMWn0k8pZg5Iez5WCjCwnLUNk2wdC\n\t8ppJuyw7+AFzFZ66mjFN3jUR+NfWHe5HyLBxf5IQ=","To":"Sebastian Fricke <sebastian.fricke.linux@gmail.com>,\n\tlibcamera-devel@lists.libcamera.org","References":"<20201118112616.11075-1-sebastian.fricke.linux@gmail.com>","From":"Kieran Bingham <kieran.bingham@ideasonboard.com>","Autocrypt":"addr=kieran.bingham@ideasonboard.com; keydata=\n\tmQINBFYE/WYBEACs1PwjMD9rgCu1hlIiUA1AXR4rv2v+BCLUq//vrX5S5bjzxKAryRf0uHat\n\tV/zwz6hiDrZuHUACDB7X8OaQcwhLaVlq6byfoBr25+hbZG7G3+5EUl9cQ7dQEdvNj6V6y/SC\n\trRanWfelwQThCHckbobWiQJfK9n7rYNcPMq9B8e9F020LFH7Kj6YmO95ewJGgLm+idg1Kb3C\n\tpotzWkXc1xmPzcQ1fvQMOfMwdS+4SNw4rY9f07Xb2K99rjMwZVDgESKIzhsDB5GY465sCsiQ\n\tcSAZRxqE49RTBq2+EQsbrQpIc8XiffAB8qexh5/QPzCmR4kJgCGeHIXBtgRj+nIkCJPZvZtf\n\tKr2EAbc6tgg6DkAEHJb+1okosV09+0+TXywYvtEop/WUOWQ+zo+Y/OBd+8Ptgt1pDRyOBzL8\n\tRXa8ZqRf0Mwg75D+dKntZeJHzPRJyrlfQokngAAs4PaFt6UfS+ypMAF37T6CeDArQC41V3ko\n\tlPn1yMsVD0p+6i3DPvA/GPIksDC4owjnzVX9kM8Zc5Cx+XoAN0w5Eqo4t6qEVbuettxx55gq\n\t8K8FieAjgjMSxngo/HST8TpFeqI5nVeq0/lqtBRQKumuIqDg+Bkr4L1V/PSB6XgQcOdhtd36\n\tOe9X9dXB8YSNt7VjOcO7BTmFn/Z8r92mSAfHXpb07YJWJosQOQARAQABtDBLaWVyYW4gQmlu\n\tZ2hhbSA8a2llcmFuLmJpbmdoYW1AaWRlYXNvbmJvYXJkLmNvbT6JAlcEEwEKAEECGwMFCwkI\n\tBwIGFQgJCgsCBBYCAwECHgECF4ACGQEWIQSQLdeYP70o/eNy1HqhHkZyEKRh/QUCXWTtygUJ\n\tCyJXZAAKCRChHkZyEKRh/f8dEACTDsbLN2nioNZMwyLuQRUAFcXNolDX48xcUXsWS2QjxaPm\n\tVsJx8Uy8aYkS85mdPBh0C83OovQR/OVbr8AxhGvYqBs3nQvbWuTl/+4od7DfK2VZOoKBAu5S\n\tQK2FYuUcikDqYcFWJ8DQnubxfE8dvzojHEkXw0sA4igINHDDFX3HJGZtLio+WpEFQtCbfTAG\n\tYZslasz1YZRbwEdSsmO3/kqy5eMnczlm8a21A3fKUo3g8oAZEFM+f4DUNzqIltg31OAB/kZS\n\tenKZQ/SWC8PmLg/ZXBrReYakxXtkP6w3FwMlzOlhGxqhIRNiAJfXJBaRhuUWzPOpEDE9q5YJ\n\tBmqQL2WJm1VSNNVxbXJHpaWMH1sA2R00vmvRrPXGwyIO0IPYeUYQa3gsy6k+En/aMQJd27dp\n\taScf9am9PFICPY5T4ppneeJLif2lyLojo0mcHOV+uyrds9XkLpp14GfTkeKPdPMrLLTsHRfH\n\tfA4I4OBpRrEPiGIZB/0im98MkGY/Mu6qxeZmYLCcgD6qz4idOvfgVOrNh+aA8HzIVR+RMW8H\n\tQGBN9f0E3kfwxuhl3omo6V7lDw8XOdmuWZNC9zPq1UfryVHANYbLGz9KJ4Aw6M+OgBC2JpkD\n\thXMdHUkC+d20dwXrwHTlrJi1YNp6rBc+xald3wsUPOZ5z8moTHUX/uPA/qhGsbkCDQRWBP1m\n\tARAAzijkb+Sau4hAncr1JjOY+KyFEdUNxRy+hqTJdJfaYihxyaj0Ee0P0zEi35CbE6lgU0Uz\n\ttih9fiUbSV3wfsWqg1Ut3/5rTKu7kLFp15kF7eqvV4uezXRD3Qu4yjv/rMmEJbbD4cTvGCYI\n\td6MDC417f7vK3hCbCVIZSp3GXxyC1LU+UQr3fFcOyCwmP9vDUR9JV0BSqHHxRDdpUXE26Dk6\n\tmhf0V1YkspE5St814ETXpEus2urZE5yJIUROlWPIL+hm3NEWfAP06vsQUyLvr/GtbOT79vXl\n\tEn1aulcYyu20dRRxhkQ6iILaURcxIAVJJKPi8dsoMnS8pB0QW12AHWuirPF0g6DiuUfPmrA5\n\tPKe56IGlpkjc8cO51lIxHkWTpCMWigRdPDexKX+Sb+W9QWK/0JjIc4t3KBaiG8O4yRX8ml2R\n\t+rxfAVKM6V769P/hWoRGdgUMgYHFpHGSgEt80OKK5HeUPy2cngDUXzwrqiM5Sz6Od0qw5pCk\n\tNlXqI0W/who0iSVM+8+RmyY0OEkxEcci7rRLsGnM15B5PjLJjh1f2ULYkv8s4SnDwMZ/kE04\n\t/UqCMK/KnX8pwXEMCjz0h6qWNpGwJ0/tYIgQJZh6bqkvBrDogAvuhf60Sogw+mH8b+PBlx1L\n\toeTK396wc+4c3BfiC6pNtUS5GpsPMMjYMk7kVvEAEQEAAYkCPAQYAQoAJgIbDBYhBJAt15g/\n\tvSj943LUeqEeRnIQpGH9BQJdizzIBQkLSKZiAAoJEKEeRnIQpGH9eYgQAJpjaWNgqNOnMTmD\n\tMJggbwjIotypzIXfhHNCeTkG7+qCDlSaBPclcPGYrTwCt0YWPU2TgGgJrVhYT20ierN8LUvj\n\t6qOPTd+Uk7NFzL65qkh80ZKNBFddx1AabQpSVQKbdcLb8OFs85kuSvFdgqZwgxA1vl4TFhNz\n\tPZ79NAmXLackAx3sOVFhk4WQaKRshCB7cSl+RIng5S/ThOBlwNlcKG7j7W2MC06BlTbdEkUp\n\tECzuuRBv8wX4OQl+hbWbB/VKIx5HKlLu1eypen/5lNVzSqMMIYkkZcjV2SWQyUGxSwq0O/sx\n\tS0A8/atCHUXOboUsn54qdxrVDaK+6jIAuo8JiRWctP16KjzUM7MO0/+4zllM8EY57rXrj48j\n\tsbEYX0YQnzaj+jO6kJtoZsIaYR7rMMq9aUAjyiaEZpmP1qF/2sYenDx0Fg2BSlLvLvXM0vU8\n\tpQk3kgDu7kb/7PRYrZvBsr21EIQoIjXbZxDz/o7z95frkP71EaICttZ6k9q5oxxA5WC6sTXc\n\tMW8zs8avFNuA9VpXt0YupJd2ijtZy2mpZNG02fFVXhIn4G807G7+9mhuC4XG5rKlBBUXTvPU\n\tAfYnB4JBDLmLzBFavQfvonSfbitgXwCG3vS+9HEwAjU30Bar1PEOmIbiAoMzuKeRm2LVpmq4\n\tWZw01QYHU/GUV/zHJSFk","Organization":"Ideas on Board","Message-ID":"<92627993-2752-4d43-ebdd-e9e7a332add6@ideasonboard.com>","Date":"Wed, 18 Nov 2020 11:42:17 +0000","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101\n\tThunderbird/68.10.0","MIME-Version":"1.0","In-Reply-To":"<20201118112616.11075-1-sebastian.fricke.linux@gmail.com>","Content-Language":"en-GB","Subject":"Re: [libcamera-devel] [PATCH v1] libcamera: v4l2_subdev: update\n\tstruct description","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"<libcamera-devel.lists.libcamera.org>","List-Unsubscribe":"<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>","List-Archive":"<https://lists.libcamera.org/pipermail/libcamera-devel/>","List-Post":"<mailto:libcamera-devel@lists.libcamera.org>","List-Help":"<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>","List-Subscribe":"<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>","Reply-To":"kieran.bingham@ideasonboard.com","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>"}},{"id":13772,"web_url":"https://patchwork.libcamera.org/comment/13772/","msgid":"<357524a7-37d7-cc6d-131c-e75cb660e130@ideasonboard.com>","date":"2020-11-18T11:47:58","subject":"Re: [libcamera-devel] [PATCH v1] libcamera: v4l2_subdev: update\n\tstruct description","submitter":{"id":4,"url":"https://patchwork.libcamera.org/api/people/4/","name":"Kieran Bingham","email":"kieran.bingham@ideasonboard.com"},"content":"On 18/11/2020 11:42, Kieran Bingham wrote:\n> Hi Sebastian,\n> \n> On 18/11/2020 11:26, Sebastian Fricke wrote:\n>> The described documents were moved from 4.15 -> 4.13.\n> \n> I wonder if there's a better way for us to link to those references\n> without them always becoming stale. Most likely not - they'll always\n> have updates, and there's no permalink style urls.\n\nActually, I'm not sure that was correct.\n\n\n4.13.3.1 links to:\nhttps://www.kernel.org/doc/html/latest/userspace-api/media/v4l/dev-subdev.html#format-negotiation\n\nwhile 4.13.3.4.1 links to:\nhttps://www.kernel.org/doc/html/latest/userspace-api/media/v4l/subdev-formats.html\n\n\nThat has changed url in the (recent) past, but it's not tied to the\nsection number.\n\nI wonder if we should provide URLs directly...\n\nWe can automate the checking/validity of those URLs if they are\nreferenced in doxygen, as it has a url-checker built in.\n\n--\nKieran\n\n\n> \n>> s/the fourcc code that identify the format/the fourcc code that identifies the format/\n>>\n>> Signed-off-by: Sebastian Fricke <sebastian.fricke.linux@gmail.com>\n> \n> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>\n> \n>> ---\n>>  src/libcamera/v4l2_subdevice.cpp | 6 +++---\n>>  1 file changed, 3 insertions(+), 3 deletions(-)\n>>\n>> diff --git a/src/libcamera/v4l2_subdevice.cpp b/src/libcamera/v4l2_subdevice.cpp\n>> index 85d00c2..0860c28 100644\n>> --- a/src/libcamera/v4l2_subdevice.cpp\n>> +++ b/src/libcamera/v4l2_subdevice.cpp\n>> @@ -141,11 +141,11 @@ const std::map<uint32_t, V4L2SubdeviceFormatInfo> formatInfoMap = {\n>>   * The format of images when transported on physical interconnections is known\n>>   * as the \"media bus format\", and it is identified by a resolution and a pixel\n>>   * format identification code, known as the \"media bus code\", not to be confused\n>> - * with the fourcc code that identify the format of images when stored in memory\n>> + * with the fourcc code that identifies the format of images when stored in memory\n>>   * (see V4L2VideoDevice::V4L2DeviceFormat).\n>>   *\n>>   * Media Bus formats supported by the V4L2 APIs are described in Section\n>> - * 4.15.3.4.1 of the \"Part I - Video for Linux API\" chapter of the \"Linux Media\n>> + * 4.13.3.4.1 of the \"Part I - Video for Linux API\" chapter of the \"Linux Media\n>>   * Infrastructure userspace API\", part of the Linux kernel documentation.\n>>   *\n>>   * Image media bus formats are properties of the subdev pads.  When images are\n>> @@ -154,7 +154,7 @@ const std::map<uint32_t, V4L2SubdeviceFormatInfo> formatInfoMap = {\n>>   * underlying driver format matching criteria) in order to prepare for a\n>>   * successful streaming operation. For a more detailed description of the image\n>>   * format negotiation process when performed between V4L2 subdevices, refer to\n>> - * Section 4.15.3.1 of the above mentioned Linux kernel documentation section.\n>> + * Section 4.13.3.1 of the above mentioned Linux kernel documentation section.\n>>   */\n>>  \n>>  /**\n>>\n>","headers":{"Return-Path":"<libcamera-devel-bounces@lists.libcamera.org>","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 71907BE176\n\tfor <parsemail@patchwork.libcamera.org>;\n\tWed, 18 Nov 2020 11:48:03 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 0243E61568;\n\tWed, 18 Nov 2020 12:48:03 +0100 (CET)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 29AFB61565\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tWed, 18 Nov 2020 12:48:01 +0100 (CET)","from [192.168.0.20]\n\t(cpc89244-aztw30-2-0-cust3082.18-1.cable.virginm.net [86.31.172.11])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 96B7D9BF;\n\tWed, 18 Nov 2020 12:48:00 +0100 (CET)"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"M/jHDFRR\"; 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