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5e7154ff5e
GVT-g only simulates DP port for guest and leaves EDP_PSR_IMR and EDP_PSR_IIR registers as default MMIO read/write. So guest won't get expected initial values of these registers when initializing the gpu driver, which results in following warning and logs. -------- Interrupt register 0x64838 is not zero: 0xffffffff WARNING: CPU: 1 PID: 157 at drivers/gpu/drm/i915/i915_irq.c:177 gen3_assert_iir_is_zero+0x38/0xa0 Call Trace: gen8_de_irq_postinstall+0xa7/0x400 gen8_irq_postinstall+0x27/0x80 drm_irq_install+0xbc/0x140 i915_driver_load+0xa9d/0xd50 -------- Because GVT-g does not handle EDP(embedded DP) simulation for guests, always set EDP_PSR_IMR and EDP_PSR_IIR to value 0. Signed-off-by: Longhe Zheng <longhe.zheng@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.