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When reading memory latencies for watermark calculations, previous
display releases instructed to apply an adjustment of adding a certain
value (e.g. 6us) to all levels when the level 0's memory latency read
from hardware was zero.
For Xe3p_LPD, the instruction is to always use 6us for level 0 and to
add that value to the other levels. Add the necessary code in
sanitize_wm_latency() so that WaWmMemoryReadLatency is always applied
for Xe3p_LPD and beyond.
v2:
- Rebased after addition of prep patch "drm/i915/wm: Reorder
adjust_wm_latency() for Xe3_LPD" (dropped in v3).
v3:
- Back to the simpler approach of doing the 'wm[0] = 0' step without
modifying the rest of the code, and that inside
sanitize_wm_latency(). (Matt Roper, Ville)
Bspec: 68986, 69126
Cc: Matt Atwood <matthew.s.atwood@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patch.msgid.link/20251103-xe3p_lpd-basic-enabling-v3-20-00e87b510ae7@intel.com
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
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| certs | ||
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| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .pylintrc | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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 reStructuredText 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.