From patchwork Mon Jan 4 19:18:12 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Zabel X-Patchwork-Id: 7950531 Return-Path: X-Original-To: patchwork-linux-mediatek@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 99D45BEEE5 for ; Mon, 4 Jan 2016 19:18:48 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AD7F52035D for ; Mon, 4 Jan 2016 19:18:47 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C75DD2034E for ; Mon, 4 Jan 2016 19:18:46 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aGAeU-00075A-1v; Mon, 04 Jan 2016 19:18:46 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aGAeR-000723-IM for linux-mediatek@lists.infradead.org; Mon, 04 Jan 2016 19:18:44 +0000 Received: from dude.hi.4.pengutronix.de ([10.1.0.7] helo=dude.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1aGAdy-0003JM-Cv; Mon, 04 Jan 2016 20:18:14 +0100 From: Philipp Zabel To: alsa-devel@alsa-project.org Subject: [RFC v2 4/6] video: rmk's HDMI notification prototype Date: Mon, 4 Jan 2016 20:18:12 +0100 Message-Id: <1451935092-24701-1-git-send-email-p.zabel@pengutronix.de> X-Mailer: git-send-email 2.6.2 In-Reply-To: <1451934551-21333-1-git-send-email-p.zabel@pengutronix.de> References: <1451934551-21333-1-git-send-email-p.zabel@pengutronix.de> X-SA-Exim-Connect-IP: 10.1.0.7 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: linux-mediatek@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160104_111843_900668_4EA3109B X-CRM114-Status: GOOD ( 15.15 ) X-Spam-Score: -1.9 (-) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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, kernel@pengutronix.de, Matthias Brugger MIME-Version: 1.0 Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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. The current use case for the notifications on MediaTek MT8173 is to let the (dis)connection notifications control an ALSA jack object. No Signed-off-by yet since this is not my code, and up for discussion. [1] https://patchwork.kernel.org/patch/7339011/ --- drivers/video/Makefile | 2 +- drivers/video/hdmi-not.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++ include/linux/hdmi-not.h | 39 +++++++++++++++++++++++++++++++ 3 files changed, 101 insertions(+), 1 deletion(-) create mode 100644 drivers/video/hdmi-not.c create mode 100644 include/linux/hdmi-not.h diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 9ad3c17..bf25760 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -1,5 +1,5 @@ obj-$(CONFIG_VGASTATE) += vgastate.o -obj-$(CONFIG_HDMI) += hdmi.o +obj-$(CONFIG_HDMI) += hdmi.o hdmi-not.o obj-$(CONFIG_VT) += console/ obj-$(CONFIG_LOGO) += logo/ diff --git a/drivers/video/hdmi-not.c b/drivers/video/hdmi-not.c new file mode 100644 index 0000000..ba3be8a --- /dev/null +++ b/drivers/video/hdmi-not.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-not.h b/include/linux/hdmi-not.h new file mode 100644 index 0000000..940ece45 --- /dev/null +++ b/include/linux/hdmi-not.h @@ -0,0 +1,39 @@ +#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);