From patchwork Thu Feb 18 15:06:50 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russell King - ARM Linux X-Patchwork-Id: 8351501 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id CE23FC0553 for ; Thu, 18 Feb 2016 15:12:29 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D383420254 for ; Thu, 18 Feb 2016 15:12:28 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id 61E0D2037C for ; Thu, 18 Feb 2016 15:12:27 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id 2698B2612AE; Thu, 18 Feb 2016 16:12:25 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_NONE, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=no version=3.3.1 Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 6D03B266591; Thu, 18 Feb 2016 16:10:46 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id DF4C526657A; Thu, 18 Feb 2016 16:10:45 +0100 (CET) Received: from pandora.arm.linux.org.uk (pandora.arm.linux.org.uk [78.32.30.218]) by alsa0.perex.cz (Postfix) with ESMTP id 23E89266A2E for ; Thu, 18 Feb 2016 16:07:07 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=arm.linux.org.uk; s=pandora-2014; h=Sender:In-Reply-To:Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date; bh=kQQCQBZrgBUSsk/v3NM5jVonih65aKbXnGfFASCTV9k=; b=ko2UeYmHY7dxMSe20rx0wtZfGQfXa496msB83wjFvXzL0zeUiPcP8qNYZXQ8FbjcoPg1NYu0fA0NGfuTni/eX2LqPkDmBmOkPXzoEgAWjw6r+pH3JQTb347GTXvTNDmQZ2I95SB0gzOxuqNM4eW51c6cWUeKNwg7CVVj3jfwAGE=; Received: from n2100.arm.linux.org.uk ([fd8f:7570:feb6:1:214:fdff:fe10:4f86]:39399) by pandora.arm.linux.org.uk with esmtpsa (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1aWQAQ-0007vz-Qt; Thu, 18 Feb 2016 15:06:55 +0000 Received: from linux by n2100.arm.linux.org.uk with local (Exim 4.76) (envelope-from ) id 1aWQAN-0007qa-Bw; Thu, 18 Feb 2016 15:06:51 +0000 Date: Thu, 18 Feb 2016 15:06:50 +0000 From: Russell King - ARM Linux To: Philipp Zabel Message-ID: <20160218150650.GR19428@n2100.arm.linux.org.uk> References: <1455807526-16918-1-git-send-email-p.zabel@pengutronix.de> <1455807741-19122-2-git-send-email-p.zabel@pengutronix.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1455807741-19122-2-git-send-email-p.zabel@pengutronix.de> User-Agent: Mutt/1.5.23 (2014-03-12) Cc: Jean-Francois Moine , alsa-devel@alsa-project.org, Lars-Peter Clausen , Arnaud Pouliquen , Koro Chen , Jyri Sarha , Liam Girdwood , Mark Brown , linux-mediatek@lists.infradead.org, Daniel Kurtz , kernel@pengutronix.de, Matthias Brugger , Cawa Cheng Subject: Re: [alsa-devel] [RFC v4 4/8] video: rmk's HDMI notification prototype X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP On Thu, Feb 18, 2016 at 04:02:17PM +0100, Philipp Zabel wrote: > This is extracted from Russell's food for thought HDMI notification > prototype [1]. I've put it into drivers/video for the time being because > my kernels don't have drivers/cec yet. I see it's also the old version still - this is my latest version, only subtly different in terms of the file naming and Kconfig option name. Functionally the same. drivers/video/Kconfig | 3 +++ drivers/video/Makefile | 1 + drivers/video/hdmi-notifier.c | 61 +++++++++++++++++++++++++++++++++++++++++++ include/linux/hdmi-notifier.h | 44 +++++++++++++++++++++++++++++++ 4 files changed, 109 insertions(+) diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index e0606c01e8ac..193649c8a951 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -40,6 +40,9 @@ config VIDEOMODE_HELPERS config HDMI bool +config HDMI_NOTIFIERS + bool + if VT source "drivers/video/console/Kconfig" endif diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 9ad3c17d6456..65f564906fb4 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -1,5 +1,6 @@ obj-$(CONFIG_VGASTATE) += vgastate.o obj-$(CONFIG_HDMI) += hdmi.o +obj-$(CONFIG_HDMI_NOTIFIERS) += hdmi-notifier.o obj-$(CONFIG_VT) += console/ obj-$(CONFIG_LOGO) += logo/ diff --git a/drivers/video/hdmi-notifier.c b/drivers/video/hdmi-notifier.c new file mode 100644 index 000000000000..a233359cacfa --- /dev/null +++ b/drivers/video/hdmi-notifier.c @@ -0,0 +1,61 @@ +#include +#include +#include +#include + +static BLOCKING_NOTIFIER_HEAD(hdmi_notifier); + +int hdmi_register_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&hdmi_notifier, nb); +} +EXPORT_SYMBOL_GPL(hdmi_register_notifier); + +int hdmi_unregister_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&hdmi_notifier, nb); +} +EXPORT_SYMBOL_GPL(hdmi_unregister_notifier); + +void hdmi_event_connect(struct device *dev) +{ + struct hdmi_event_base base; + + base.source = dev; + + blocking_notifier_call_chain(&hdmi_notifier, HDMI_CONNECTED, &base); +} +EXPORT_SYMBOL_GPL(hdmi_event_connect); + +void hdmi_event_disconnect(struct device *dev) +{ + struct hdmi_event_base base; + + base.source = dev; + + blocking_notifier_call_chain(&hdmi_notifier, HDMI_DISCONNECTED, &base); +} +EXPORT_SYMBOL_GPL(hdmi_event_disconnect); + +void hdmi_event_new_edid(struct device *dev, const void *edid, size_t size) +{ + struct hdmi_event_new_edid new_edid; + + new_edid.base.source = dev; + new_edid.edid = edid; + new_edid.size = size; + + blocking_notifier_call_chain(&hdmi_notifier, HDMI_NEW_EDID, &new_edid); +} +EXPORT_SYMBOL_GPL(hdmi_event_new_edid); + +void hdmi_event_new_eld(struct device *dev, const void *eld) +{ + struct hdmi_event_new_eld new_eld; + + new_eld.base.source = dev; + memcpy(new_eld.eld, eld, sizeof(new_eld.eld)); + + blocking_notifier_call_chain(&hdmi_notifier, HDMI_NEW_ELD, &new_eld); +} +EXPORT_SYMBOL_GPL(hdmi_event_new_eld); diff --git a/include/linux/hdmi-notifier.h b/include/linux/hdmi-notifier.h new file mode 100644 index 000000000000..9c5ad498f610 --- /dev/null +++ b/include/linux/hdmi-notifier.h @@ -0,0 +1,44 @@ +#ifndef LINUX_HDMI_NOTIFIER_H +#define LINUX_HDMI_NOTIFIER_H + +#include + +enum { + HDMI_CONNECTED, + HDMI_DISCONNECTED, + HDMI_NEW_EDID, + HDMI_NEW_ELD, +}; + +struct hdmi_event_base { + struct device *source; +}; + +struct hdmi_event_new_edid { + struct hdmi_event_base base; + const void *edid; + size_t size; +}; + +struct hdmi_event_new_eld { + struct hdmi_event_base base; + unsigned char eld[128]; +}; + +union hdmi_event { + struct hdmi_event_base base; + struct hdmi_event_new_edid edid; + struct hdmi_event_new_eld eld; +}; + +struct notifier_block; + +int hdmi_register_notifier(struct notifier_block *nb); +int hdmi_unregister_notifier(struct notifier_block *nb); + +void hdmi_event_connect(struct device *dev); +void hdmi_event_disconnect(struct device *dev); +void hdmi_event_new_edid(struct device *dev, const void *edid, size_t size); +void hdmi_event_new_eld(struct device *dev, const void *eld); + +#endif