drm/i915: make DP work on LPT-LP machines

We need to enable a special bit, otherwise none of the DP functions
requiring the PCH will work.

Version 2: store the PCH ID inside dev_priv, as suggested by Daniel
Vetter.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index b25df10b0b5c..669afcabe3b1 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -737,6 +737,7 @@ typedef struct drm_i915_private {
 
         /* PCH chipset type */
         enum intel_pch pch_type;
+        unsigned short pch_id;
 
         unsigned long quirks;
 
@@ -1205,6 +1206,13 @@ struct drm_i915_file_private {
 
 #define HAS_PIPE_CONTROL(dev) (INTEL_INFO(dev)->gen >= 5)
 
+#define INTEL_PCH_DEVICE_ID_MASK                0xff00
+#define INTEL_PCH_IBX_DEVICE_ID_TYPE            0x3b00
+#define INTEL_PCH_CPT_DEVICE_ID_TYPE            0x1c00
+#define INTEL_PCH_PPT_DEVICE_ID_TYPE            0x1e00
+#define INTEL_PCH_LPT_DEVICE_ID_TYPE            0x8c00
+#define INTEL_PCH_LPT_LP_DEVICE_ID_TYPE         0x9c00
+
 #define INTEL_PCH_TYPE(dev) (((struct drm_i915_private *)(dev)->dev_private)->pch_type)
 #define HAS_PCH_LPT(dev) (INTEL_PCH_TYPE(dev) == PCH_LPT)
 #define HAS_PCH_CPT(dev) (INTEL_PCH_TYPE(dev) == PCH_CPT)