49a630b00b
Considering that HDCP2.2 is more secure than HDCP1.4, When a setup supports HDCP2.2 and HDCP1.4, HDCP2.2 will be enabled. When HDCP2.2 enabling fails and HDCP1.4 is supported, HDCP1.4 is enabled. This change implements a sequence of enabling and disabling of HDCP2.2 authentication and HDCP2.2 port encryption. v2: Included few optimization suggestions [Chris Wilson] Commit message is updated as per the rebased version. intel_wait_for_register is used instead of wait_for. [Chris Wilson] v3: Extra comment added and Style issue fixed [Uma] v4: Rebased as part of patch reordering. HDCP2 encryption status is tracked. HW state check is moved into WARN_ON [Daniel] v5: Redefined the mei service functions as per comp redesign. Merged patches related to hdcp2.2 enabling and disabling [Sean Paul]. Required shim functionality is defined [Sean Paul] v6: Return values are handles [Uma] Realigned the code. Check for comp_master is removed. v7: HDCP2.2 is attempted only if mei interface is up. Adjust to the new interface Avoid bool usage in struct [Tomas] v8: mei_binded status check is removed. %s/hdcp2_in_use/hdcp2_encrypted v9: bool is used in struct intel_hdcp. [Daniel] v10: panel is replaced with sink [Uma] Mei interface decided the hdcp2_capability. WARN_ON if hdcp_enable is called when hdcp state is ENABLED. Reviewed-by Uma. Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1550338640-17470-7-git-send-email-ramalingam.c@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.