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drm/i915: Probe for PCH chipset type 

PCH is the new name for south bridge from Ironlake/Sandybridge,
which contains most of the display outputs except eDP. This one
adds a probe function to detect current PCH type, and method to
detect Cougarpoint PCH.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhenyu Wang 2010-04-07 16:15:53 +08:00 committed by Eric Anholt
parent 7da9f6cbf7
commit 3bad078183
3 changed files with 44 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_dma.c
View File

@ -1710,6 +1710,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
/* Start out suspended */
dev_priv->mm.suspended = 1;
intel_detect_pch(dev);
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
ret = i915_load_modeset_init(dev, prealloc_start,
prealloc_size, agp_size);

29
drivers/gpu/drm/i915/i915_drv.c
View File

@ -187,6 +187,35 @@ const static struct pci_device_id pciidlist[] = {
MODULE_DEVICE_TABLE(pci, pciidlist);
#endif
#define INTEL_PCH_DEVICE_ID_MASK 0xff00
#define INTEL_PCH_CPT_DEVICE_ID_TYPE 0x1c00
void intel_detect_pch (struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct pci_dev *pch;
/*
* The reason to probe ISA bridge instead of Dev31:Fun0 is to
* make graphics device passthrough work easy for VMM, that only
* need to expose ISA bridge to let driver know the real hardware
* underneath. This is a requirement from virtualization team.
*/
pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
if (pch) {
if (pch->vendor == PCI_VENDOR_ID_INTEL) {
int id;
id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
dev_priv->pch_type = PCH_CPT;
DRM_DEBUG_KMS("Found CougarPoint PCH\n");
}
}
pci_dev_put(pch);
}
}
static int i915_drm_freeze(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

13
drivers/gpu/drm/i915/i915_drv.h
View File

@ -221,6 +221,11 @@ enum no_fbc_reason {
FBC_NOT_TILED, /* buffer not tiled */
};
enum intel_pch {
PCH_IBX, /* Ibexpeak PCH */
PCH_CPT, /* Cougarpoint PCH */
};
typedef struct drm_i915_private {
struct drm_device *dev;
@ -331,6 +336,9 @@ typedef struct drm_i915_private {
/* Display functions */
struct drm_i915_display_funcs display;
/* PCH chipset type */
enum intel_pch pch_type;
/* Register state */
bool modeset_on_lid;
u8 saveLBB;
@ -992,6 +1000,8 @@ extern int intel_modeset_vga_set_state(struct drm_device *dev, bool state);
extern void i8xx_disable_fbc(struct drm_device *dev);
extern void g4x_disable_fbc(struct drm_device *dev);
extern void intel_detect_pch (struct drm_device *dev);
/**
* Lock test for when it's just for synchronization of ring access.
*
@ -1137,6 +1147,9 @@ extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller);
#define HAS_PCH_SPLIT(dev) (IS_IRONLAKE(dev) || \
IS_GEN6(dev))
#define INTEL_PCH_TYPE(dev) (((struct drm_i915_private *)(dev)->dev_private)->pch_type)
#define HAS_PCH_CPT(dev) (INTEL_PCH_TYPE(dev) == PCH_CPT)
#define PRIMARY_RINGBUFFER_SIZE (128*1024)
#endif