linux-kernel - [PATCH v4 02/15] drm: bridge/dw_hdmi: wrap irq control in fucntions

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Date:	Sat, 28 Feb 2015 21:28:47 -0500
From:	Yakir Yang <ykk@...k-chips.com>
To:	djkurtz@...omium.org, dianders@...omium.org,
	linux-rockchip@...ts.infradead.org
Cc:	David Airlie <airlied@...ux.ie>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Yakir Yang <ykk@...k-chips.com>,
	Andy Yan <andy.yan@...k-chips.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	mmind00@...glemail.com, marcheu@...omium.org,
	mark.yao@...k-chips.com
Subject: [PATCH v4 02/15] drm: bridge/dw_hdmi: wrap irq control in fucntions

Wrap irq control in functions, and then we can call in
dw_hdmi_bind/dw_hdmi_unbind/dw_hdmi_resume/dw_hdmi_suspend
functions.

Signed-off-by: Yakir Yang <ykk@...k-chips.com>
---
Changes in v4: None
Changes in v3:
- Wrap irq control in fucntions

Changes in v2: None

 drivers/gpu/drm/bridge/dw_hdmi.c | 75 ++++++++++++++++++++--------------------
 1 file changed, 37 insertions(+), 38 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index dc314f5..08f10da 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -1330,6 +1330,40 @@ static void initialize_hdmi_ih_mutes(struct dw_hdmi *hdmi)
 	hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
 }
 
+static void hdmi_mute_interrupts(struct dw_hdmi *hdmi)
+{
+	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);
+}
+
+static void hdmi_unmute_interrupts(struct dw_hdmi *hdmi)
+{
+	initialize_hdmi_ih_mutes(hdmi);
+
+	/*
+	 * 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);
+}
+
 static void dw_hdmi_poweron(struct dw_hdmi *hdmi)
 {
 	dw_hdmi_setup(hdmi, &hdmi->previous_mode);
@@ -1650,25 +1684,11 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
 	 */
 	hdmi_init_clk_regenerator(hdmi);
 
-	/*
-	 * 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);
-
-	ret = dw_hdmi_fb_registered(hdmi);
-	if (ret)
-		goto err_iahb;
-
 	ret = dw_hdmi_register(drm, hdmi);
 	if (ret)
 		goto err_iahb;
 
-	/* Unmute interrupts */
-	hdmi_writeb(hdmi, ~HDMI_IH_PHY_STAT0_HPD, HDMI_IH_MUTE_PHY_STAT0);
+	hdmi_unmute_interrupts(hdmi);
 
 	dev_set_drvdata(dev, hdmi);
 
@@ -1702,17 +1722,8 @@ 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);
+	hdmi_mute_interrupts(hdmi);
 
 	return 0;
 }
@@ -1722,19 +1733,7 @@ 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);
+	hdmi_unmute_interrupts(hdmi);
 
 	return 0;
 }
-- 
2.1.2


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