diff options
| author | Ramalingam C <ramalingam.c@intel.com> | 2018-01-18 11:18:07 +0530 |
|---|---|---|
| committer | Sean Paul <seanpaul@chromium.org> | 2018-01-18 17:55:26 -0500 |
| commit | 24b42cbadb73e0b9ac67c2d619073b394bc146bd (patch) | |
| tree | 056806819a11c51889f6d193420c061b79746393 /drivers/gpu/drm/i915/intel_hdcp.c | |
| parent | 87eb3ec818fa57bc49ce419785c56d72d9da1faa (diff) | |
| download | linux-24b42cbadb73e0b9ac67c2d619073b394bc146bd.tar.bz2 | |
drm/i915: Start repeater auth on READY/CP_IRQ
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
Diffstat (limited to 'drivers/gpu/drm/i915/intel_hdcp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_hdcp.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c index c8e611af408e..b50c03a3bfe6 100644 --- a/drivers/gpu/drm/i915/intel_hdcp.c +++ b/drivers/gpu/drm/i915/intel_hdcp.c @@ -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; + 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); if (ret) return ret; @@ -161,12 +167,6 @@ int intel_hdcp_auth_downstream(struct intel_digital_port *intel_dig_port, 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); if (!ksv_fifo) return -ENOMEM; |