[Intel-gfx] [PATCH v2] drm/i915: Add RP1 render P state thresholds in CHV

[deepak.s at linux.intel.com]

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

This is useful for userspace utilities to verify and micromanaging
the increase/decrease frequncy.

v2: Use vlv_gpu_freq to get freq (Deepak)

Signed-off-by: Deepak S <deepak.s at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 3fb65e9..225b6cb 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3809,6 +3809,16 @@ static int cherryview_rps_rpe_freq(struct drm_i915_private *dev_priv)
 	return rpe;
 }
 
+int cherryview_rps_guar_freq(struct drm_i915_private *dev_priv)
+{
+	u32 val, rp1;
+
+	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
+	rp1 = (val >> PUNIT_GPU_STATUS_MAX_FREQ_SHIFT) & PUNIT_GPU_STATUS_MAX_FREQ_MASK;
+
+	return rp1;
+}
+
 int cherryview_rps_min_freq(struct drm_i915_private *dev_priv)
 {
 	u32 val, rpn;
@@ -4010,6 +4020,11 @@ static void cherryview_init_gt_powersave(struct drm_device *dev)
 			 vlv_gpu_freq(dev_priv, dev_priv->rps.efficient_freq),
 			 dev_priv->rps.efficient_freq);
 
+	dev_priv->rps.rp1_freq = cherryview_rps_guar_freq(dev_priv);
+	DRM_DEBUG_DRIVER("RP1(Guar) GPU freq: %d MHz (%u)\n",
+			 vlv_gpu_freq(dev_priv, dev_priv->rps.rp1_freq),
+			 dev_priv->rps.rp1_freq);
+
 	dev_priv->rps.min_freq = cherryview_rps_min_freq(dev_priv);
 	DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
 			 vlv_gpu_freq(dev_priv, dev_priv->rps.min_freq),
-- 
1.9.1