From patchwork Sun Mar 1 02:18:07 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yakir Yang X-Patchwork-Id: 5906601 Return-Path: X-Original-To: patchwork-linux-rockchip@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 31F2ABF440 for ; Sun, 1 Mar 2015 02:20:49 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5199F20272 for ; Sun, 1 Mar 2015 02:20:48 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9C24920328 for ; Sun, 1 Mar 2015 02:20:46 +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 1YRtUs-0004qn-3B; Sun, 01 Mar 2015 02:20:46 +0000 Received: from regular1.263xmail.com ([211.150.99.130]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YRtUp-0004hc-Tg for linux-rockchip@lists.infradead.org; Sun, 01 Mar 2015 02:20:45 +0000 Received: from ykk?rock-chips.com (unknown [192.168.167.140]) by regular1.263xmail.com (Postfix) with SMTP id D71CD659E; Sun, 1 Mar 2015 10:20:13 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id 67AF743E; Sun, 1 Mar 2015 10:20:10 +0800 (CST) X-RL-SENDER: ykk@rock-chips.com X-FST-TO: djkurtz@chromium.org X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: ykk@rock-chips.com X-UNIQUE-TAG: <4acd691d1319368336f2689427d9ae2b> X-ATTACHMENT-NUM: 0 X-SENDER: ykk@rock-chips.com X-DNS-TYPE: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith ESMTP id 26269343U3U; Sun, 01 Mar 2015 10:20:11 +0800 (CST) From: Yakir Yang To: djkurtz@chromium.org, dianders@chromium.org, linux-rockchip@lists.infradead.org Subject: [PATCH v4 01/15] drm: bridge/dw_hdmi: add irq control to suspend/resume Date: Sat, 28 Feb 2015 21:18:07 -0500 Message-Id: <1425176287-24751-1-git-send-email-ykk@rock-chips.com> X-Mailer: git-send-email 2.1.2 In-Reply-To: <1425175834-24661-1-git-send-email-ykk@rock-chips.com> References: <1425175834-24661-1-git-send-email-ykk@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150228_182044_861635_D35B5807 X-CRM114-Status: UNSURE ( 6.95 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.0 (/) Cc: Fabio Estevam , mmind00@googlemail.com, marcheu@chromium.org, David Airlie , Greg Kroah-Hartman , Yakir Yang , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Philipp Zabel , Andy Yan , Russell King , mark.yao@rock-chips.com X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_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 when kernel enter into suspend, cpus will shutdown, hdmi registers will reset invisibly. After kernel resume, drm core will call the bridge enable function. All of hdmi registers will be setup again except the interrupt registers. In that case we should mute all the interrupt in suspend stage, and umnute the interrupt we need in the resume stage. Signed-off-by: Yakir Yang --- Changes in v4: None Changes in v3: - Clear Hotplug interrupts before dw_hdmi_fb_register Changes in v2: - Add irq control to suspend/resume interfaces drivers/gpu/drm/bridge/dw_hdmi.c | 41 ++++++++++++++++++++++++++++++++++++++++ include/drm/bridge/dw_hdmi.h | 2 ++ 2 files changed, 43 insertions(+) diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c index cd6a706..dc314f5 100644 --- a/drivers/gpu/drm/bridge/dw_hdmi.c +++ b/drivers/gpu/drm/bridge/dw_hdmi.c @@ -1699,6 +1699,47 @@ void dw_hdmi_unbind(struct device *dev, struct device *master, void *data) } EXPORT_SYMBOL_GPL(dw_hdmi_unbind); +int dw_hdmi_suspend(struct device *dev) +{ + struct dw_hdmi *hdmi = dev_get_drvdata(dev); + u8 ih_mute; + + /* Disable all interrupts */ + hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0); + + /* Disable top level interrupt bits in HDMI block */ + ih_mute = hdmi_readb(hdmi, HDMI_IH_MUTE) | + HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT | + HDMI_IH_MUTE_MUTE_ALL_INTERRUPT; + + hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE); + + return 0; +} +EXPORT_SYMBOL_GPL(dw_hdmi_suspend); + +int dw_hdmi_resume(struct device *dev) +{ + struct dw_hdmi *hdmi = dev_get_drvdata(dev); + + /* + * Configure registers related to HDMI interrupt + * generation before registering IRQ. + */ + hdmi_writeb(hdmi, HDMI_PHY_HPD, HDMI_PHY_POL0); + + /* Clear Hotplug interrupts */ + hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD, HDMI_IH_PHY_STAT0); + + dw_hdmi_fb_registered(hdmi); + + /* Unmute interrupts */ + hdmi_writeb(hdmi, ~HDMI_IH_PHY_STAT0_HPD, HDMI_IH_MUTE_PHY_STAT0); + + return 0; +} +EXPORT_SYMBOL_GPL(dw_hdmi_resume); + MODULE_AUTHOR("Sascha Hauer "); MODULE_AUTHOR("Andy Yan "); MODULE_AUTHOR("Yakir Yang "); diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h index 5a4f490..e8cfe1c 100644 --- a/include/drm/bridge/dw_hdmi.h +++ b/include/drm/bridge/dw_hdmi.h @@ -53,6 +53,8 @@ struct dw_hdmi_plat_data { struct drm_display_mode *mode); }; +int dw_hdmi_resume(struct device *dev); +int dw_hdmi_suspend(struct device *dev); void dw_hdmi_unbind(struct device *dev, struct device *master, void *data); int dw_hdmi_bind(struct device *dev, struct device *master, void *data, struct drm_encoder *encoder,