drm/i915: use i915_enable_rc6 on SNB too

For debug & testing.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 463f753..e99ae3b 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6959,7 +6959,7 @@ void gen6_enable_rps(struct drm_i915_private *dev_priv)
 {
        u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
        u32 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
-       u32 pcu_mbox;
+       u32 pcu_mbox, rc6_mask = 0;
        int cur_freq, min_freq, max_freq;
        int i;
 
@@ -6990,9 +6990,12 @@ void gen6_enable_rps(struct drm_i915_private *dev_priv)
        I915_WRITE(GEN6_RC6p_THRESHOLD, 100000);
        I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
 
+       if (i915_enable_rc6)
+               rc6_mask = GEN6_RC_CTL_RC6p_ENABLE |
+                       GEN6_RC_CTL_RC6_ENABLE;
+
        I915_WRITE(GEN6_RC_CONTROL,
-                  GEN6_RC_CTL_RC6p_ENABLE |
-                  GEN6_RC_CTL_RC6_ENABLE |
+                  rc6_mask |
                   GEN6_RC_CTL_EI_MODE(1) |
                   GEN6_RC_CTL_HW_ENABLE);