[Intel-gfx] [PATCH v2] drm/i915: Drop WA to fix Voltage not getting dropped to Vmin when Gfx is power gated for latest VLV revision

[deepak.s at linux.intel.com]

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

Workaround fixed in Latest VLV revision. Forcing Gfx clk up not needed, and Requesting the
min freq should bring bring the voltage Vnn.

v2: Drop WA for Latest VLV revision (Ville)

Signed-off-by: Deepak S <deepak.s at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a90fdbd..6b6cfd4 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3212,6 +3212,14 @@ void gen6_set_rps(struct drm_device *dev, u8 val)
 */
 static void vlv_set_rps_idle(struct drm_i915_private *dev_priv)
 {
+	struct drm_device *dev = dev_priv->dev;
+
+	/* Latest VLV doesn't need Vnn WA*/
+	if (dev->pdev->revision >= 0xd) {
+		valleyview_set_rps(dev_priv->dev, dev_priv->rps.min_freq_softlimit);
+		return;
+	}
+
 	/*
 	 * When we are idle.  Drop to min voltage state.
 	 */
-- 
1.9.1