drm/i915: enable thermal reporting for IPS

Thermal reporting may not be enabled by default on some machines, so
enable the appropriate bits to allow IPS to get the data it needs from
the CPU thermal device.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 2e9191d7712..c6b8292c070 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5635,6 +5635,10 @@ void ironlake_enable_drps(struct drm_device *dev)
         u32 rgvmodectl = I915_READ(MEMMODECTL);
         u8 fmax, fmin, fstart, vstart;
 
+        /* Enable temp reporting */
+        I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
+        I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);
+
         /* 100ms RC evaluation intervals */
         I915_WRITE(RCUPEI, 100000);
         I915_WRITE(RCDNEI, 100000);