From patchwork Fri Aug 12 14:14:55 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russell King X-Patchwork-Id: 9277043 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 8A64760467 for ; Fri, 12 Aug 2016 14:15:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7C8A528A23 for ; Fri, 12 Aug 2016 14:15:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 713C628A26; Fri, 12 Aug 2016 14:15:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8785028A23 for ; Fri, 12 Aug 2016 14:15:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752738AbcHLOPE (ORCPT ); Fri, 12 Aug 2016 10:15:04 -0400 Received: from pandora.armlinux.org.uk ([78.32.30.218]:34025 "EHLO pandora.armlinux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752447AbcHLOPE (ORCPT ); Fri, 12 Aug 2016 10:15:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2014; h=Date:Sender:Message-Id:Content-Type:Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References:In-Reply-To; bh=CCb+gIN0U4gBW6Vr0f3XeFj9z0kh3dkb+nXH3Y6PTao=; b=BxN5xboKqH+aX2mm6zjv3Ay+FoRV6kB5sYcgmnJ++DlCPERQAMhmVLyyCr2/X2mFSYphFfUhc/GXJrGGQ0+9ZyxIdl86GoCxJZ4Lsp2TK/IJrrRDSiZOBqrcTAprpKTsubJ7kJ38hrSXwSlFM47en3KwmjJZnFi94Poe8pWImCA=; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:43336 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1bYDEe-0006aP-6o; Fri, 12 Aug 2016 15:14:56 +0100 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1bYDEd-0004rZ-3i; Fri, 12 Aug 2016 15:14:55 +0100 In-Reply-To: <20160812141421.GB1041@n2100.armlinux.org.uk> References: <20160812141421.GB1041@n2100.armlinux.org.uk> From: Russell King To: David Airlie , Jean-Christophe Plagniol-Villard , Tomi Valkeinen , Hans Verkuil Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH RFC 1/5] video: add HDMI state notifier support MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Fri, 12 Aug 2016 15:14:55 +0100 Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add support for HDMI hotplug and EDID notifiers, which is used to convey information from HDMI drivers to their CEC and audio counterparts. Acked-by: Philipp Zabel Signed-off-by: Russell King Acked-by: Hans Verkuil --- 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(+) create mode 100644 drivers/video/hdmi-notifier.c create mode 100644 include/linux/hdmi-notifier.h diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 3c20af999893..1ee7b9f9bb25 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -36,6 +36,9 @@ 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..f3b16552b0fe --- /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 u8 eld[128]) +{ + 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..5fb710e5d68a --- /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 u8 eld[128]); + +#endif