drm/i915: parse VBT general definition block to get the SDVO device info

The general definition block contains the child device tables, which include
the SDVO device info. For example: device slave address, device dvo port,
device type.

We will get the info of SDVO device by parsing the general definition blocks.
Only when a valid slave address is found, it is regarded as the SDVO device.
And the info of DVO port and slave address is recorded.

http://bugs.freedesktop.org/show_bug.cgi?id=20429

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

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 ded9e786883e..db81f5513daa 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -126,6 +126,13 @@ struct drm_i915_fence_reg {
         struct drm_gem_object *obj;
 };
 
+struct sdvo_device_mapping {
+        u8 dvo_port;
+        u8 slave_addr;
+        u8 dvo_wiring;
+        u8 initialized;
+};
+
 typedef struct drm_i915_private {
         struct drm_device *dev;
 
@@ -389,6 +396,7 @@ typedef struct drm_i915_private {
                 /* storage for physical objects */
                 struct drm_i915_gem_phys_object *phys_objs[I915_MAX_PHYS_OBJECT];
         } mm;
+        struct sdvo_device_mapping sdvo_mappings[2];
 } drm_i915_private_t;
 
 /** driver private structure attached to each drm_gem_object */