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drm/i915: Optimize HDCP key load
author
Ramalingam C
<ramalingam.c@intel.com>
Fri, 2 Feb 2018 22:09:07 +0000
(
03:39
+0530)
committer
Sean Paul
<seanpaul@chromium.org>
Mon, 5 Feb 2018 17:59:14 +0000
(12:59 -0500)
HDCP key need not be cleared on each hdcp disable. And HDCP key Load
is skipped if key is already loaded.
v2:
No change. Added Reviewed-by tag.
v3:
No change.
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link:
https://patchwork.freedesktop.org/patch/msgid/1517609350-10698-6-git-send-email-ramalingam.c@intel.com
drivers/gpu/drm/i915/intel_hdcp.c
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diff --git
a/drivers/gpu/drm/i915/intel_hdcp.c
b/drivers/gpu/drm/i915/intel_hdcp.c
index d7ddd6b28cd79bea28856e803b4da8249fe27bd2..5c8e6d1829ef35645a545c2ebb13822668f65255 100644
(file)
--- a/
drivers/gpu/drm/i915/intel_hdcp.c
+++ b/
drivers/gpu/drm/i915/intel_hdcp.c
@@
-49,6
+49,10
@@
static int intel_hdcp_load_keys(struct drm_i915_private *dev_priv)
int ret;
u32 val;
+ val = I915_READ(HDCP_KEY_STATUS);
+ if ((val & HDCP_KEY_LOAD_DONE) && (val & HDCP_KEY_LOAD_STATUS))
+ return 0;
+
/*
* On HSW and BDW HW loads the HDCP1.4 Key when Display comes
* out of reset. So if Key is not already loaded, its an error state.
@@
-542,8
+546,6
@@
static int _intel_hdcp_disable(struct intel_connector *connector)
return -ETIMEDOUT;
}
- intel_hdcp_clear_keys(dev_priv);
-
ret = connector->hdcp_shim->toggle_signalling(intel_dig_port, false);
if (ret) {
DRM_ERROR("Failed to disable HDCP signalling\n");