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8c05e5bfef
In both the Android SDK and Linux SDK, when compiling for a 64-bit
system, the CONFIG_COMPAT macro is enabled, but the unlocked_ioctl call
is not compiled. The hdcp2_tx_rx service compiled on Android is 32-bit,
corresponding to a 64-bit kernel. Therefore, ioctl calls go through
compat_ioctl without any issues. However, services and kernels built
with the NVR SDK and Linux SDK are consistent at 64 bits. This causes
ioctl calls to go through unlocked_ioctl, leading to exceptions.
Fixes: 8f36a88f84 ("drm/rockchip: Add dw hdcp2 controller driver")
Change-Id: I3090bcb03e509360b54194d1152cf05437dc0627
Signed-off-by: Eddy Zhang <eddy.zhang@rock-chips.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.