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<div class="moz-cite-prefix">On 11/27/2018 8:45 PM, Ville Syrjälä
wrote:<br>
</div>
<blockquote type="cite" cite="mid:20181127151545.GZ9144@intel.com">
<pre class="moz-quote-pre" wrap="">On Tue, Nov 27, 2018 at 07:32:56PM +0530, Ramalingam C wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">HDCP1.4 key load process varies between Intel platform to platform.
For Gen9 platforms except BXT and GLK, HDCP1.4 key is loaded using
the GT Driver Mailbox interface. Instead of listing all the platforms
for this method, adopted this method for all Gen9 platforms with
exceptions. In this way we need not extent check for new GEN9 platforms
like CFL.
Signed-off-by: Ramalingam C <a class="moz-txt-link-rfc2396E" href="mailto:ramalingam.c@intel.com"><ramalingam.c@intel.com></a>
---
drivers/gpu/drm/i915/intel_hdcp.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index 1bf487f94254..beacfbb6e5e1 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -157,10 +157,12 @@ static int intel_hdcp_load_keys(struct drm_i915_private *dev_priv)
/*
* Initiate loading the HDCP key from fuses.
*
- * BXT+ platforms, HDCP key needs to be loaded by SW. Only SKL and KBL
- * differ in the key load trigger process from other platforms.
+ * BXT+ platforms, HDCP key needs to be loaded by SW. Only Gen 9
+ * platforms except BXT and GLK, differ in the key load trigger process
+ * from other platforms.
*/
- if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
+ if (IS_GEN9(dev_priv) &&
+ (!IS_BROXTON(dev_priv) && !IS_GEMINILAKE(dev_priv))) {
</pre>
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<pre class="moz-quote-pre" wrap="">
IS_GEN9_BC()</pre>
</blockquote>
<pre>Bspec doesn't state anything about BC/LP. They have mentioned GEN9+ with BXT, CNL, ICL excluded.
So I am inferring that this method is only for Gen9 excluding BXT and GLK (verified).
Remaining platforms are SKL, KBL, and CFL.
IS_GEN9_BC() will filter them easily. unless we find otherwise, we can use this. Thanks Ville.
--Ram
</pre>
<blockquote type="cite" cite="mid:20181127151545.GZ9144@intel.com">
<pre class="moz-quote-pre" wrap="">
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap=""> mutex_lock(&dev_priv->pcu_lock);
ret = sandybridge_pcode_write(dev_priv,
SKL_PCODE_LOAD_HDCP_KEYS, 1);
--
2.7.4
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</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
</pre>
</blockquote>
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