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
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