From patchwork Tue Feb 3 15:16:54 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yakir Yang X-Patchwork-Id: 5769551 Return-Path: X-Original-To: patchwork-linux-arm@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 1EC2BBF440 for ; Tue, 3 Feb 2015 15:20:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 331A6201FB for ; Tue, 3 Feb 2015 15:20:24 +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 5C563200E3 for ; Tue, 3 Feb 2015 15:20:23 +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 1YIfF4-0001bB-AS; Tue, 03 Feb 2015 15:18:18 +0000 Received: from regular1.263xmail.com ([211.150.99.132]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YIfF0-000116-Ns; Tue, 03 Feb 2015 15:18:16 +0000 Received: from ykk?rock-chips.com (unknown [192.168.167.11]) by regular1.263xmail.com (Postfix) with SMTP id AE99789A1; Tue, 3 Feb 2015 23:17:42 +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 EF52E428; Tue, 3 Feb 2015 23:17:13 +0800 (CST) X-RL-SENDER: ykk@rock-chips.com X-FST-TO: airlied@linux.ie X-SENDER-IP: 192.253.240.203 X-LOGIN-NAME: ykk@rock-chips.com X-UNIQUE-TAG: X-ATTACHMENT-NUM: 0 X-SENDER: ykk@rock-chips.com X-DNS-TYPE: 0 Received: from localhost.localdomain (unknown [192.253.240.203]) by smtp.263.net (Postfix) whith ESMTP id 31670K4QC18; Tue, 03 Feb 2015 23:17:41 +0800 (CST) From: Yakir Yang To: David Airlie , Russell King , Philipp Zabel Subject: [PATCH v3 11/15] drm: bridge/dw_hdmi: add audio clock control interfaces Date: Tue, 3 Feb 2015 10:16:54 -0500 Message-Id: <1422976614-30400-1-git-send-email-ykk@rock-chips.com> X-Mailer: git-send-email 2.1.2 In-Reply-To: <1422975418-13302-1-git-send-email-ykk@rock-chips.com> References: <1422975418-13302-1-git-send-email-ykk@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150203_071815_735314_AF105012 X-CRM114-Status: UNSURE ( 9.50 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 1.7 (+) Cc: Mark Rutland , alsa-devel@alsa-project.org, Heiko Stuebner , djkurtz@chromium.org, dianders@chromium.org, Yakir Yang , mmind00@googlemail.com, Pawel Moll , linux-rockchip@lists.infradead.org, Sean Cross , devicetree@vger.kernel.org, Arnd Bergmann , Ian Campbell , Jyri Sarha , Ben Zhang , Rob Herring , dri-devel@lists.freedesktop.org, marcheu@chromium.org, linux-arm-kernel@lists.infradead.org, Mark Yao , Fabio Estevam , linux-kernel@vger.kernel.org, Rob Clark , Daniel Vetter , Kumar Gala , Shawn Guo X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY, URIBL_BLACK 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 Add audio clock enable/disable/restore interfacess, those functions can be called concurrently on multiple different threads of execution to change the hdmi audio enable state. Signed-off-by: Yakir Yang --- Changes in v3: - Delete hdmi_audio_config interface and modify audio clock control functions Changes in v2: - Add audio config interfaces to dw_hdmi driver drivers/gpu/drm/bridge/dw_hdmi.c | 60 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 54 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c index 44e95f3..92fc12d 100644 --- a/drivers/gpu/drm/bridge/dw_hdmi.c +++ b/drivers/gpu/drm/bridge/dw_hdmi.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include @@ -146,6 +147,9 @@ struct dw_hdmi { void __iomem *regs; unsigned int sample_rate; + struct mutex audio_mutex; + bool audio_enable; + int ratio; void (*write)(struct dw_hdmi *hdmi, u8 val, int offset); @@ -1234,6 +1238,53 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi) hdmi->phy_enabled = false; } +static void dw_hdmi_audio_clk_enable(struct dw_hdmi *hdmi) +{ + hdmi_modb(hdmi, 0, HDMI_MC_CLKDIS_AUDCLK_DISABLE, HDMI_MC_CLKDIS); +} + +static void dw_hdmi_audio_clk_disable(struct dw_hdmi *hdmi) +{ + hdmi_modb(hdmi, HDMI_MC_CLKDIS_AUDCLK_DISABLE, + HDMI_MC_CLKDIS_AUDCLK_DISABLE, HDMI_MC_CLKDIS); +} + +static void hdmi_audio_restore(struct dw_hdmi *hdmi) +{ + mutex_lock(&hdmi->audio_mutex); + + if (hdmi->audio_enable) + dw_hdmi_audio_clk_enable(hdmi); + else + dw_hdmi_audio_clk_disable(hdmi); + + mutex_unlock(&hdmi->audio_mutex); +} + +static void hdmi_audio_enable(struct dw_hdmi *hdmi) +{ + mutex_lock(&hdmi->audio_mutex); + + if (!hdmi->audio_enable) { + hdmi->audio_enable = true; + dw_hdmi_audio_clk_enable(hdmi); + } + + mutex_unlock(&hdmi->audio_mutex); +} + +static void hdmi_audio_disable(struct dw_hdmi *hdmi) +{ + mutex_lock(&hdmi->audio_mutex); + + if (hdmi->audio_enable) { + hdmi->audio_enable = false; + dw_hdmi_audio_clk_disable(hdmi); + } + + mutex_unlock(&hdmi->audio_mutex); +} + /* HDMI Initialization Step B.4 */ static void dw_hdmi_enable_video_path(struct dw_hdmi *hdmi) { @@ -1264,11 +1315,6 @@ static void dw_hdmi_enable_video_path(struct dw_hdmi *hdmi) } } -static void hdmi_enable_audio_clk(struct dw_hdmi *hdmi) -{ - hdmi_modb(hdmi, 0, HDMI_MC_CLKDIS_AUDCLK_DISABLE, HDMI_MC_CLKDIS); -} - /* Workaround to clear the overflow condition */ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi) { @@ -1364,7 +1410,7 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode) /* HDMI Initialization Step E - Configure audio */ hdmi_clk_regenerator_update_pixel_clock(hdmi); - hdmi_enable_audio_clk(hdmi); + hdmi_audio_restore(hdmi); /* HDMI Initialization Step F - Configure AVI InfoFrame */ hdmi_config_AVI(hdmi); @@ -1758,6 +1804,8 @@ int dw_hdmi_bind(struct device *dev, struct device *master, hdmi->sample_rate = 48000; hdmi->ratio = 100; hdmi->encoder = encoder; + hdmi->audio_enable = false; + mutex_init(&hdmi->audio_mutex); of_property_read_u32(np, "reg-io-width", &val);