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[v3,14/27] drm/i915/slpc: Send shutdown event

Message ID 1471948800-28641-15-git-send-email-sagar.a.kamble@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

sagar.a.kamble@intel.com Aug. 23, 2016, 10:39 a.m. UTC 
From: Tom O'Rourke <Tom.O'Rourke@intel.com>

Send SLPC shutdown event during disable, suspend, and reset
operations. Sending shutdown event while already shutdown
is OK.

v1: Return void instead of ignored error code (Paulo)
    Removed WARN_ON for checking msb of gtt address of
    shared gem obj. (ChrisW)
    Added SLPC state update during disable, suspend and reset.
    Changed semantics of reset. It is supposed to just disable. (Sagar)

Reviewed-by: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
---
 drivers/gpu/drm/i915/intel_slpc.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/intel_slpc.c b/drivers/gpu/drm/i915/intel_slpc.c
index b9e76f8..0687b21 100644
--- a/drivers/gpu/drm/i915/intel_slpc.c
+++ b/drivers/gpu/drm/i915/intel_slpc.c
@@ -52,6 +52,19 @@  static void host2guc_slpc_reset(struct drm_i915_private *dev_priv)
 	host2guc_slpc(dev_priv, data, 4);
 }
 
+static void host2guc_slpc_shutdown(struct drm_i915_private *dev_priv)
+{
+	u32 data[4];
+	u32 shared_data_gtt_offset = i915_ggtt_offset(dev_priv->guc.slpc.vma);
+
+	data[0] = HOST2GUC_ACTION_SLPC_REQUEST;
+	data[1] = SLPC_EVENT(SLPC_EVENT_SHUTDOWN, 2);
+	data[2] = shared_data_gtt_offset;
+	data[3] = 0;
+
+	host2guc_slpc(dev_priv, data, 4);
+}
+
 static unsigned int slpc_get_platform_sku(struct drm_i915_private *dev_priv)
 {
 	enum slpc_platform_sku platform_sku;
@@ -155,10 +168,14 @@  void intel_slpc_cleanup(struct drm_i915_private *dev_priv)
 
 void intel_slpc_suspend(struct drm_i915_private *dev_priv)
 {
+	host2guc_slpc_shutdown(dev_priv);
+	dev_priv->guc.slpc.enabled = false;
 }
 
 void intel_slpc_disable(struct drm_i915_private *dev_priv)
 {
+	host2guc_slpc_shutdown(dev_priv);
+	dev_priv->guc.slpc.enabled = false;
 }
 
 void intel_slpc_enable(struct drm_i915_private *dev_priv)
@@ -169,4 +186,6 @@  void intel_slpc_enable(struct drm_i915_private *dev_priv)
 
 void intel_slpc_reset(struct drm_i915_private *dev_priv)
 {
+	host2guc_slpc_shutdown(dev_priv);
+	dev_priv->guc.slpc.enabled = false;
 }