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3e31d05743
On some MST docking stations, rx_info can only be read after RepeaterAuth_Send_ReceiverID_List and the RxStatus READY bit is set otherwise the read will return -EIO. This behavior causes the mst stream type1 capability test to fail to read rx_info and determine if the topology supports type1 and fallback to type0. To fix this, check for type1 capability when we receive rx_info within the AKE flow when we read RepeaterAuth_Send_ReceiverID_List instead of an explicit read just for type1 capability checking. This does require moving where we set stream_types to after hdcp2_authenticate_sink() when we get rx_info but this occurs before we do hdcp2_propagate_stream_management_info. Also, legacy HDCP 2.0/2.1 are not type 1 capable either so check for that as well. Changes since v5: - rename intel_set_stream_types() to intel_hdcp_prepare_streams() (Anshuman) Changes since v4: - move topology_type1_capable to intel_digital_port and rename it as hdcp_mst_type1_capable (Anshuman) - make a helper function intel_set_stream_types() to set stream types in hdcp2_authenticate_and_encrypt() (Anshuman) - break on failure to set stream types and retry instead of returning - remove no longer used declaration for streams_type1_capable() Changes since v2: - Remove no longer used variables in _intel_hdcp2_enable() Signed-off-by: Juston Li <juston.li@intel.com> Reviewed-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com> Tested-by: Suraj K <suraj.kandpal@intel.com> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210819184835.1181323-4-juston.li@intel.com |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.