drm/i915: Revive combination mode for backlight control

[mv-sheeva.git] / drivers / gpu / drm / i915 / i915_reg.h

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 3e6f486f4605b57af97797e8dae0d9e2eea35b3b..2abe240dae5837ff2c993a804012f9439b17390d 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1553,7 +1553,17 @@
 
 /* Backlight control */
 #define BLC_PWM_CTL            0x61254
+#define   BACKLIGHT_MODULATION_FREQ_SHIFT              (17)
 #define BLC_PWM_CTL2           0x61250 /* 965+ only */
+#define   BLM_COMBINATION_MODE (1 << 30)
+/*
+ * This is the most significant 15 bits of the number of backlight cycles in a
+ * complete cycle of the modulated backlight control.
+ *
+ * The actual value is this field multiplied by two.
+ */
+#define   BACKLIGHT_MODULATION_FREQ_MASK               (0x7fff << 17)
+#define   BLM_LEGACY_MODE                              (1 << 16)
 /*
  * This is the number of cycles out of the backlight modulation cycle for which
  * the backlight is on.