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drm/i915: Start repeater auth on READY/CP_IRQ

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Second stage of HDCP authentication starts at CP_IRQ or at the
assertion of READY bit from Repeater.

Till then repeater will be authenticating with its downstream devices.
So authenticated device count, depth and ksv_list readable from
repeaters are valid only after assertion of READY/CP_IRQ.

This patch makes sure that READY is polled before reading any
topology information.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1516254488-4971-4-git-send-email-ramalingam.c@intel.com
This commit is contained in:
Ramalingam C 2018-01-18 11:18:07 +05:30 committed by Sean Paul
parent 87eb3ec818
commit 24b42cbadb
1 changed files with 6 additions and 6 deletions
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12
drivers/gpu/drm/i915/intel_hdcp.c
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@ -150,6 +150,12 @@ int intel_hdcp_auth_downstream(struct intel_digital_port *intel_dig_port,
dev_priv = intel_dig_port->base.base.dev->dev_private; dev_priv = intel_dig_port->base.base.dev->dev_private;
ret = intel_hdcp_poll_ksv_fifo(intel_dig_port, shim);
if (ret) {
DRM_ERROR("KSV list failed to become ready (%d)\n", ret);
return ret;
}
ret = shim->read_bstatus(intel_dig_port, bstatus); ret = shim->read_bstatus(intel_dig_port, bstatus);
if (ret) if (ret)
return ret; return ret;
@ -161,12 +167,6 @@ int intel_hdcp_auth_downstream(struct intel_digital_port *intel_dig_port,
return 0; return 0;
} }
ret = intel_hdcp_poll_ksv_fifo(intel_dig_port, shim);
if (ret) {
DRM_ERROR("KSV list failed to become ready (%d)\n", ret);
return ret;
}
ksv_fifo = kzalloc(num_downstream * DRM_HDCP_KSV_LEN, GFP_KERNEL); ksv_fifo = kzalloc(num_downstream * DRM_HDCP_KSV_LEN, GFP_KERNEL);
if (!ksv_fifo) if (!ksv_fifo)
return -ENOMEM; return -ENOMEM;