From patchwork Wed Mar 2 14:49:08 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Zabel X-Patchwork-Id: 8481451 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 0DBBCC0553 for ; Wed, 2 Mar 2016 14:51:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1571A20251 for ; Wed, 2 Mar 2016 14:51:42 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id ECF052037E for ; Wed, 2 Mar 2016 14:51:38 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id 85A9E26683F; Wed, 2 Mar 2016 15:51:37 +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=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 6C6832666EC; Wed, 2 Mar 2016 15:49:39 +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 29428265055; Wed, 2 Mar 2016 15:49:37 +0100 (CET) Received: from metis.ext.4.pengutronix.de (metis.ext.4.pengutronix.de [92.198.50.35]) by alsa0.perex.cz (Postfix) with ESMTP id B0EAF26548E for ; Wed, 2 Mar 2016 15:49:23 +0100 (CET) Received: from paszta.hi.4.pengutronix.de ([10.1.0.120] helo=paszta.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1ab85b-0006uv-Cn; Wed, 02 Mar 2016 15:49:23 +0100 From: Philipp Zabel To: alsa-devel@alsa-project.org Date: Wed, 2 Mar 2016 15:49:08 +0100 Message-Id: <1456930153-11853-5-git-send-email-p.zabel@pengutronix.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1456930153-11853-1-git-send-email-p.zabel@pengutronix.de> References: <1456930153-11853-1-git-send-email-p.zabel@pengutronix.de> X-SA-Exim-Connect-IP: 10.1.0.120 X-SA-Exim-Mail-From: p.zabel@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: alsa-devel@alsa-project.org Cc: Jean-Francois Moine , Koro Chen , Lars-Peter Clausen , Russell King - ARM Linux , Philipp Zabel , Arnaud Pouliquen , Liam Girdwood , Jyri Sarha , Cawa Cheng , Mark Brown , linux-mediatek@lists.infradead.org, Daniel Kurtz , kernel@pengutronix.de, Matthias Brugger Subject: [alsa-devel] [PATCH v5 4/9] 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: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP This is Russell's HDMI notification prototype [1], currently waiting for the HDMI CEC situation to resolve. The use case for the notifications on MediaTek MT8173 is to let the (dis)connection notifications control an ALSA jack object. No Signed-off-by since this is not my code, and still up for discussion. [1] https://patchwork.kernel.org/patch/8351501/ --- Changes since v4: - Updated to latest version --- 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 e0606c0..193649c 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 9ad3c17..65f5649 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 0000000..a233359 --- /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 0000000..9c5ad49 --- /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