The Display Monitor Timing specification is a PDF with data tables.
A small Python script can be used to extract its contents in a
machine-readable form.
For now only extract a few fields. This can be extended later.
Signed-off-by: Simon Ser <contact@emersion.fr>
A simple version script is used because it allows us to consistently
expose all symbols starting with "di_", removing the risk to forget
to mark a symbol as public.
Signed-off-by: Simon Ser <contact@emersion.fr>
These warnings are easy to miss during development:
../edid.c: In function ‘_di_edid_parse’:
../edid.c:254:25: warning: implicit declaration of function ‘di_edid_destroy’? [-Wimplicit-function-declaration]
254 | di_edid_destroy(edid);
| ^~~~~~~~~~~~~~~
And when missed, the code still compiles. Which means one needs to clean-build
to show them again.
Signed-off-by: Simon Ser <contact@emersion.fr>
Add two small shell utilities to generate and compare diffs between
edid-decode and di-edid-decode. Store the diffs in-tree and add tests
to ensure they don't regress. Run the tests in CI with a pinned
installation of edid-decode.
One EDID blob is added to the test collection: dell-2408wfp-dp. It's
extracted [1] from the edid-decode repository.
[1]: https://git.linuxtv.org/edid-decode.git/tree/data/dell-2408wfp-dp
Signed-off-by: Simon Ser <contact@emersion.fr>
Closes: https://gitlab.freedesktop.org/emersion/libdisplay-info/-/issues/5
This utility displays low-level EDID information. It uses the same
format as the official edid-decode CLI tool from linuxtv.org. It
will be helpful for testing.
Signed-off-by: Simon Ser <contact@emersion.fr>
This exposes a new di_info opaque struct from which high-level
information will be able to be queried by the user. A new
di_info_parse_edid function creates a di_info from an EDID blob.
Signed-off-by: Simon Ser <contact@emersion.fr>
Introduce an opaque struct di_edid to host EDID structures. Add
a function to create a di_edid (with basic size, header and
checksum validation). Add functions to fetch the EDID version and
revision.
This doesn't do much, but hopefully can be used as a fundation.
Signed-off-by: Simon Ser <contact@emersion.fr>
This warns when implicit conversions may alter a value. It's easy
to miss implicit conversions from signed to unsigned, from real to
integer, or to smaller types. This warning forces such conversions
to be explicit.
Signed-off-by: Simon Ser <contact@emersion.fr>
Enable a few extra warning options, including -Walloca because it's
error-prone. Enable -Wdeclaration-after-statement to enforce the code
style. Disable -Wunused-parameter and -Wmissing-field-initializers
because these are pointless and don't catch bugs.
Inspired from the Weston and wlroots options.
Signed-off-by: Simon Ser <contact@emersion.fr>
