drm/gma500: Add support for aux pci vdc device

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>

drivers/gpu/drm/gma500/psb_drv.h

@@ -75,6 +75,7 @@ enum {
  *	PCI resource identifiers
  */
 #define PSB_MMIO_RESOURCE	 0
+#define PSB_AUX_RESOURCE	 0
 #define PSB_GATT_RESOURCE	 2
 #define PSB_GTT_RESOURCE	 3
 /*
@@ -455,6 +456,7 @@ struct psb_ops;
 
 struct drm_psb_private {
 	struct drm_device *dev;
+	struct pci_dev *aux_pdev; /* Currently only used by mrst */
 	const struct psb_ops *ops;
 	const struct psb_offset *regmap;
 	
@@ -486,6 +488,7 @@ struct drm_psb_private {
 
 	uint8_t __iomem *sgx_reg;
 	uint8_t __iomem *vdc_reg;
+	uint8_t __iomem *aux_reg; /* Auxillary vdc pipe regs */
 	uint32_t gatt_free_offset;
 
 	/*
@@ -532,6 +535,7 @@ struct drm_psb_private {
 
 	/* gmbus */
 	struct intel_gmbus *gmbus;
+	uint8_t __iomem *gmbus_reg;
 
 	/* Used by SDVO */
 	int crt_ddc_pin;
@@ -928,16 +932,31 @@ static inline uint32_t REGISTER_READ(struct drm_device *dev, uint32_t reg)
 	return ioread32(dev_priv->vdc_reg + reg);
 }
 
+static inline uint32_t REGISTER_READ_AUX(struct drm_device *dev, uint32_t reg)
+{
+	struct drm_psb_private *dev_priv = dev->dev_private;
+	return ioread32(dev_priv->aux_reg + reg);
+}
+
 #define REG_READ(reg)	       REGISTER_READ(dev, (reg))
+#define REG_READ_AUX(reg)      REGISTER_READ_AUX(dev, (reg))
 
 static inline void REGISTER_WRITE(struct drm_device *dev, uint32_t reg,
-				      uint32_t val)
+				  uint32_t val)
 {
 	struct drm_psb_private *dev_priv = dev->dev_private;
 	iowrite32((val), dev_priv->vdc_reg + (reg));
 }
 
+static inline void REGISTER_WRITE_AUX(struct drm_device *dev, uint32_t reg,
+				      uint32_t val)
+{
+	struct drm_psb_private *dev_priv = dev->dev_private;
+	iowrite32((val), dev_priv->aux_reg + (reg));
+}
+
 #define REG_WRITE(reg, val)	REGISTER_WRITE(dev, (reg), (val))
+#define REG_WRITE_AUX(reg, val)	REGISTER_WRITE_AUX(dev, (reg), (val))
 
 static inline void REGISTER_WRITE16(struct drm_device *dev,
 					uint32_t reg, uint32_t val)