[{"id":1761038,"web_url":"http://patchwork.ozlabs.org/comment/1761038/","msgid":"","list_archive_url":null,"date":"2017-08-31T14:10:38","subject":"Re: [PATCHv4 4/5] cec-gpio: add HDMI CEC GPIO driver","submitter":{"id":7055,"url":"http://patchwork.ozlabs.org/api/people/7055/","name":"Linus Walleij","email":"linus.walleij@linaro.org"},"content":"On Thu, Aug 31, 2017 at 1:01 PM, Hans Verkuil wrote:\n\n> From: Hans Verkuil \n>\n> Add a simple HDMI CEC GPIO driver that sits on top of the cec-pin framework.\n>\n> While I have heard of SoCs that use the GPIO pin for CEC (apparently an\n> early RockChip SoC used that), the main use-case of this driver is to\n> function as a debugging tool.\n>\n> By connecting the CEC line to a GPIO pin on a Raspberry Pi 3 for example\n> it turns it into a CEC debugger and protocol analyzer.\n>\n> With 'cec-ctl --monitor-pin' the CEC traffic can be analyzed.\n>\n> But of course it can also be used with any hardware project where the\n> HDMI CEC line is hooked up to a pull-up gpio line.\n>\n> In addition this has (optional) support for tracing HPD changes if the\n> HPD is connected to a GPIO.\n>\n> Signed-off-by: Hans Verkuil \n\nThis looks nice!\nReviewed-by: Linus Walleij \n\nYours,\nLinus Walleij\n--\nTo unsubscribe from this list: send the line \"unsubscribe devicetree\" in\nthe body of a message to majordomo@vger.kernel.org\nMore majordomo info at http://vger.kernel.org/majordomo-info.html","headers":{"Return-Path":"","X-Original-To":"incoming-dt@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming-dt@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; 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charset=\"UTF-8\"","Sender":"devicetree-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"devicetree@vger.kernel.org"}},{"id":1761044,"web_url":"http://patchwork.ozlabs.org/comment/1761044/","msgid":"<7a7ad8d3-a52a-de47-4f50-62cd64aa52e3@xs4all.nl>","list_archive_url":null,"date":"2017-08-31T14:19:17","subject":"Re: [PATCHv4 4/5] cec-gpio: add HDMI CEC GPIO driver","submitter":{"id":723,"url":"http://patchwork.ozlabs.org/api/people/723/","name":"Hans Verkuil","email":"hverkuil@xs4all.nl"},"content":"On 31/08/17 16:10, Linus Walleij wrote:\n> On Thu, Aug 31, 2017 at 1:01 PM, Hans Verkuil wrote:\n> \n>> From: Hans Verkuil \n>>\n>> Add a simple HDMI CEC GPIO driver that sits on top of the cec-pin framework.\n>>\n>> While I have heard of SoCs that use the GPIO pin for CEC (apparently an\n>> early RockChip SoC used that), the main use-case of this driver is to\n>> function as a debugging tool.\n>>\n>> By connecting the CEC line to a GPIO pin on a Raspberry Pi 3 for example\n>> it turns it into a CEC debugger and protocol analyzer.\n>>\n>> With 'cec-ctl --monitor-pin' the CEC traffic can be analyzed.\n>>\n>> But of course it can also be used with any hardware project where the\n>> HDMI CEC line is hooked up to a pull-up gpio line.\n>>\n>> In addition this has (optional) support for tracing HPD changes if the\n>> HPD is connected to a GPIO.\n>>\n>> Signed-off-by: Hans Verkuil \n> \n> This looks nice!\n> Reviewed-by: Linus Walleij \n\nThank you for the gpio crash course! :-)\n\n\tHans\n\n--\nTo unsubscribe from this list: send the line \"unsubscribe devicetree\" in\nthe body of a message to majordomo@vger.kernel.org\nMore majordomo info at http://vger.kernel.org/majordomo-info.html","headers":{"Return-Path":"","X-Original-To":"incoming-dt@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming-dt@bilbo.ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=devicetree-owner@vger.kernel.org; receiver=)","Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xjkyh2jz6z9sD5\n\tfor ;\n\tFri, 1 Sep 2017 00:19:24 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751463AbdHaOTU (ORCPT\n\t);\n\tThu, 31 Aug 2017 10:19:20 -0400","from lb1-smtp-cloud9.xs4all.net ([194.109.24.22]:40085 \"EHLO\n\tlb1-smtp-cloud9.xs4all.net\" rhost-flags-OK-OK-OK-OK)\n\tby vger.kernel.org with ESMTP id S1751392AbdHaOTT (ORCPT\n\t); Thu, 31 Aug 2017 10:19:19 -0400","from [192.168.1.10] ([80.101.105.217])\n\tby smtp-cloud9.xs4all.net with ESMTPA\n\tid nQJRdXV8wdRLjnQJSdIGXa; Thu, 31 Aug 2017 16:19:18 +0200"],"Subject":"Re: [PATCHv4 4/5] cec-gpio: add HDMI CEC GPIO driver","To":"Linus Walleij ","References":"<20170831110156.11018-1-hverkuil@xs4all.nl>\n\t<20170831110156.11018-5-hverkuil@xs4all.nl>\n\t","Cc":"\"linux-media@vger.kernel.org\" ,\n\t\"open list:DRM PANEL DRIVERS\" ,\n\t\"devicetree@vger.kernel.org\" ,\n\tHans Verkuil ","From":"Hans Verkuil ","Message-ID":"<7a7ad8d3-a52a-de47-4f50-62cd64aa52e3@xs4all.nl>","Date":"Thu, 31 Aug 2017 16:19:17 +0200","User-Agent":"Mozilla/5.0 (X11; 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