a87d0a8476
Modern VBTs no longer contain the LFP data table pointers block (41). We are expecting to have one in order to be able to parse the LFP data block (42), so let's make one up. Since the fp_timing table has variable size we must somehow determine its size. Rather than just hardcode it we look for the terminator bytes (0xffff) to figure out where each table entry starts. dvo_timing, panel_pnp_id, and panel_name are expected to have fixed size. This has been observed on various machines, eg. TGL with BDB version 240, CML with BDB version 231, etc. The most recent VBT I've observed that still had block 41 had BDB version 228. So presumably the cutoff (if an exact cutoff even exists) is somewhere around BDB version 229-231. v2: kfree the thing we allocated, not the thing+3 bytes v3: Do the debugprint only if we found the LFP data block v4: Fix t0 null check (Jani) Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220504150440.13748-3-ville.syrjala@linux.intel.com |
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| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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 Restructured Text 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.