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Use lid state only to determine fast boot optimization is not enough. For S3/Resume, due to bios isn't involved in boot, eDP wasn't light up, while lid state is open, if do fast boot optimization, eDP panel will skip enable link and result in black screen after boot. And becasue of bios isn't involved, no matter UEFI or Legacy boot, BIOS_SCRATCH_3 value should be 0, use this to determine the case. Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com> Reviewed-by: Charlene Liu <Charlene.Liu@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.