drm/i915: split display functions by chip type

This patch splits out several of the display functions into a separate
display function table to avoid tons of chipset specific if..else
if..else if blocks all over.  There are more opportunities for this
(some noted in the structure defintition); so more cleanup patches will
follow.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2f89c2136be9..ebdc639e9858 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -153,6 +153,23 @@ struct drm_i915_error_state {
         struct timeval time;
 };
 
+struct drm_i915_display_funcs {
+        void (*dpms)(struct drm_crtc *crtc, int mode);
+        bool (*fbc_enabled)(struct drm_crtc *crtc);
+        void (*enable_fbc)(struct drm_crtc *crtc, unsigned long interval);
+        void (*disable_fbc)(struct drm_device *dev);
+        int (*get_display_clock_speed)(struct drm_device *dev);
+        int (*get_fifo_size)(struct drm_device *dev, int plane);
+        void (*update_wm)(struct drm_device *dev, int planea_clock,
+                          int planeb_clock, int sr_hdisplay, int pixel_size);
+        /* clock updates for mode set */
+        /* cursor updates */
+        /* render clock increase/decrease */
+        /* display clock increase/decrease */
+        /* pll clock increase/decrease */
+        /* clock gating init */
+};
+
 typedef struct drm_i915_private {
         struct drm_device *dev;
 
@@ -252,6 +269,9 @@ typedef struct drm_i915_private {
         struct work_struct error_work;
         struct workqueue_struct *wq;
 
+        /* Display functions */
+        struct drm_i915_display_funcs display;
+
         /* Register state */
         bool suspended;
         u8 saveLBB;