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From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: Intel Graphics Development <intel-gfx@lists.freedesktop.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Subject: [PATCH 2/4] drm/i915: wire up gmbus irq handler
Date: Thu,  6 Sep 2012 09:10:00 +0200	[thread overview]
Message-ID: <1346915402-9399-2-git-send-email-daniel.vetter@ffwll.ch> (raw)
In-Reply-To: <1346915402-9399-1-git-send-email-daniel.vetter@ffwll.ch>

Only enables the interrupt and puts a irq handler into place, doesn't
do anything yet.

Unfortunately there's no gmbus interrupt support for gen2/3 (safe for
pnv, but there the irq is marked as "Test mode").

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/i915_irq.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index a61b41a..8415fa6 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -596,6 +596,11 @@ out:
 	return ret;
 }
 
+static void gmbus_irq_handler(struct drm_device *dev)
+{
+	DRM_DEBUG_DRIVER("GMBUS interrupt\n");
+}
+
 static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
 {
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
@@ -607,7 +612,7 @@ static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
 				 SDE_AUDIO_POWER_SHIFT);
 
 	if (pch_iir & SDE_GMBUS)
-		DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
+		gmbus_irq_handler(dev);
 
 	if (pch_iir & SDE_AUDIO_HDCP_MASK)
 		DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
@@ -650,7 +655,7 @@ static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
 		DRM_DEBUG_DRIVER("AUX channel interrupt\n");
 
 	if (pch_iir & SDE_GMBUS_CPT)
-		DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
+		gmbus_irq_handler(dev);
 
 	if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
 		DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
@@ -1841,12 +1846,14 @@ static int ironlake_irq_postinstall(struct drm_device *dev)
 		hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
 				SDE_PORTB_HOTPLUG_CPT |
 				SDE_PORTC_HOTPLUG_CPT |
-				SDE_PORTD_HOTPLUG_CPT);
+				SDE_PORTD_HOTPLUG_CPT |
+				SDE_GMBUS_CPT);
 	} else {
 		hotplug_mask = (SDE_CRT_HOTPLUG |
 				SDE_PORTB_HOTPLUG |
 				SDE_PORTC_HOTPLUG |
 				SDE_PORTD_HOTPLUG |
+				SDE_GMBUS |
 				SDE_AUX_MASK);
 	}
 
@@ -1906,7 +1913,8 @@ static int ivybridge_irq_postinstall(struct drm_device *dev)
 	hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
 			SDE_PORTB_HOTPLUG_CPT |
 			SDE_PORTC_HOTPLUG_CPT |
-			SDE_PORTD_HOTPLUG_CPT);
+			SDE_PORTD_HOTPLUG_CPT |
+			SDE_GMBUS_CPT);
 	dev_priv->pch_irq_mask = ~hotplug_mask;
 
 	I915_WRITE(SDEIIR, I915_READ(SDEIIR));
@@ -1959,6 +1967,7 @@ static int valleyview_irq_postinstall(struct drm_device *dev)
 	POSTING_READ(VLV_IER);
 
 	i915_enable_pipestat(dev_priv, 0, pipestat_enable);
+	i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_INTERRUPT_STATUS);
 	i915_enable_pipestat(dev_priv, 1, pipestat_enable);
 
 	I915_WRITE(VLV_IIR, 0xffffffff);
@@ -2454,6 +2463,7 @@ static int i965_irq_postinstall(struct drm_device *dev)
 
 	dev_priv->pipestat[0] = 0;
 	dev_priv->pipestat[1] = 0;
+	i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_INTERRUPT_STATUS);
 
 	/*
 	 * Enable some error detection, note the instruction error mask
-- 
1.7.11.2

  reply	other threads:[~2012-09-06  8:17 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-06  7:09 [PATCH 1/4] drm/i915: extract gmbus_wait_hw_status Daniel Vetter
2012-09-06  7:10 ` Daniel Vetter [this message]
2012-09-06  7:10 ` [PATCH 3/4] drm/i915: use the gmbus irq for waits Daniel Vetter
2012-09-06  7:10 ` [PATCH 4/4] drm/i915: use gmbus irq to wait for gmbus idle Daniel Vetter
2012-09-06 13:06   ` Chris Wilson
2012-09-06 13:44     ` [PATCH] drm/i915: use the gmbus irq for waits Daniel Vetter
2012-09-08 17:11 ` [PATCH 1/4] drm/i915: extract gmbus_wait_hw_status Ben Widawsky

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