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ICL has two slices of DBuf, each slice of size 1024 blocks. We should not always enable slice-2. It should be enabled only if display total required BW is > 12GBps OR more than 1 pipes are enabled. Changes since V1: - typecast total_data_rate to u64 before multiplication to solve any possible overflow (Rodrigo) - fix where skl_wm_get_hw_state was memsetting ddb, resulting enabled_slices to become zero - Fix the logic of calculating ddb_size Changes since V2: - If no-crtc is part of commit required_slices will have value "0", don't try to disable DBuf slice. Changes since V3: - Create a generic helper to enable/disable slice - don't return early if total_data_rate is 0, it may be cursor only commit, or atomic modeset without any plane. Changes since V4: - Solve checkpatch warnings - use kernel types u8/u64 instead of uint8_t/uint64_t Changes since V5: - Rebase Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180426142517.16643-3-mahesh1.kumar@intel.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.