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>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index a9f8589490cf..d2daff1f8291 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -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);