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Content Protection property should be updated as per the kernel internal state. Let's say if Content protection is disabled by userspace, CP property should be set to UNDESIRED so that reauthentication will not happen until userspace request it again, but when kernel disables the HDCP due to any DDI disabling sequences like modeset/DPMS operation, kernel should set the property to DESIRED, so that when opportunity arises, kernel will start the HDCP authentication on its own. Somewhere in the line, state machine to set content protection to DESIRED from kernel was broken and IGT coverage was missing for it. This patch fixes it. v2: - Fixing hdcp CP state in connector atomic check function intel_hdcp_atomic_check(). [Maarten] This will require to check hdcp->value in intel_hdcp_update_pipe() in order to avoid enabling hdcp, if it was already enabled. v3: - Rebased. Cc: Ramalingam C <ramalingam.c@intel.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> Link: https://patchwork.freedesktop.org/patch/350962/?series=72664&rev=2 #v1 Link: https://patchwork.freedesktop.org/patch/359396/?series=72251&rev=3 #v2 Reviewed-by: Ramalingam C <ramalingam.c@intel.com> Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200630082048.22308-1-anshuman.gupta@intel.com
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.