[Intel-gfx] [PATCH 09/10] drm/i915/chv: Added CHV specific DDR fetch into init_clock_gating

[deepak.s at linux.intel.com]

From: Deepak S <deepak.s at linux.intel.com>

Signed-off-by: Deepak S <deepak.s at linux.intel.com>
[vsyrjala: Fix merge fubmle where the code ended up in
g4x_disable_trickle_feed() instead of cherryview_init_clock_gating()]
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Acked-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/intel_pm.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index dedbdf3..0d9b831 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3985,7 +3985,18 @@ static void cherryview_enable_rps(struct drm_device *dev)
 		   GEN6_RP_UP_BUSY_AVG |
 		   GEN6_RP_DOWN_IDLE_AVG);
 
+	/* ToDo: Update the mem freq based on latest spec [CHV]*/
 	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
+	switch ((val >> 6) & 3) {
+	case 0:
+	case 1:
+	case 2:
+		dev_priv->mem_freq = 1600;
+		break;
+	case 3:
+		dev_priv->mem_freq = 2000;
+		break;
+	}
 
 	DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val & 0x10 ? "yes" : "no");
 	DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
-- 
1.9.1