linux-kernel - [PATCH 1/9] gma500: Only register interrupt handler for poulsbo hardware

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Date:	Fri, 26 Aug 2011 11:17:42 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	greg@...ah.com, linux-kernel@...r.kernel.org
Subject: [PATCH 1/9] gma500: Only register interrupt handler for poulsbo
 hardware

From: Patrik Jakobsson <patrik.r.jakobsson@...il.com>

First step in adding proper irq handling. We'll start with poulsbo support so
make sure other chips don't touch drm_irq_install().

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@...il.com>
Signed-off-by: Alan Cox <alan@...ux.intel.com>
---

 drivers/staging/gma500/psb_drv.c |    2 +-
 drivers/staging/gma500/psb_drv.h |    1 +
 2 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/gma500/psb_drv.c b/drivers/staging/gma500/psb_drv.c
index b2cdce7..d91083a 100644
--- a/drivers/staging/gma500/psb_drv.c
+++ b/drivers/staging/gma500/psb_drv.c
@@ -410,7 +410,7 @@ static int psb_driver_load(struct drm_device *dev, unsigned long chipset)
 	PSB_WVDC32(0x00000000, PSB_INT_ENABLE_R);
 	PSB_WVDC32(0xFFFFFFFF, PSB_INT_MASK_R);
 	spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
-	if (drm_core_check_feature(dev, DRIVER_MODESET))
+	if (IS_PSB(dev) && drm_core_check_feature(dev, DRIVER_MODESET))
 		drm_irq_install(dev);
 
 	dev->vblank_disable_allowed = 1;
diff --git a/drivers/staging/gma500/psb_drv.h b/drivers/staging/gma500/psb_drv.h
index fd4732d..8cd4f1a 100644
--- a/drivers/staging/gma500/psb_drv.h
+++ b/drivers/staging/gma500/psb_drv.h
@@ -43,6 +43,7 @@ enum {
 	CHIP_MFLD_0130 = 3,		/* Medfield */
 };
 
+#define IS_PSB(dev) (((dev)->pci_device & 0xfffe) == 0x8108)
 #define IS_MRST(dev) (((dev)->pci_device & 0xfffc) == 0x4100)
 #define IS_MFLD(dev) (((dev)->pci_device & 0xfff8) == 0x0130)
 

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