Simon Ser
10435a83e8
edid: parse other feature support flags
...
Signed-off-by: Simon Ser <contact@emersion.fr>
2022-06-10 11:49:20 +00:00
Simon Ser
0473e12c54
edid: parse supported color encoding formats
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Signed-off-by: Simon Ser <contact@emersion.fr>
2022-06-10 11:49:20 +00:00
Simon Ser
039a2a15f7
edid: parse supported DPMS states
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Signed-off-by: Simon Ser <contact@emersion.fr>
2022-06-10 11:49:20 +00:00
Simon Ser
83396e28e3
edid: parse basic gamma
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Signed-off-by: Simon Ser <contact@emersion.fr>
2022-06-10 11:49:20 +00:00
Simon Ser
5b156d8370
edid: parse screen size
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Signed-off-by: Simon Ser <contact@emersion.fr>
2022-06-10 11:49:20 +00:00
Simon Ser
b1bce19f03
edid: parse digital video input definition
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Signed-off-by: Simon Ser <contact@emersion.fr>
2022-06-10 11:49:20 +00:00
Simon Ser
18527df178
edid: introduce get_bit_range
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Signed-off-by: Simon Ser <contact@emersion.fr>
2022-06-10 11:49:20 +00:00
Simon Ser
d680d73a3a
edid: introduce has_bit
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Signed-off-by: Simon Ser <contact@emersion.fr>
2022-06-10 11:49:20 +00:00
Simon Ser
7a31791343
edid: add support for product serial, name and data strings
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Signed-off-by: Simon Ser <contact@emersion.fr>
2022-06-09 07:28:16 +00:00
Simon Ser
2f8f41ea48
edid: add basic support for display descriptors
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Expose an API to list display descriptors. Detailed timing
descriptors are not parsed.
Signed-off-by: Simon Ser <contact@emersion.fr>
2022-06-09 07:28:16 +00:00
Simon Ser
6cbaf27c91
edid: switch to a statically allocated extension array
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The spec defines an upper bound for the extension block count,
which means we don't need to dynamically allocate the array. This
simplifies our logic a bit by removing an allocation error codepath.
The array is NULL-terminated, so EDID_MAX_BLOCK_COUNT is suitable
since it's the max number of extension blocks including the base
block, and the array doesn't include the base block.
Signed-off-by: Simon Ser <contact@emersion.fr>
2022-06-02 10:24:28 +02:00
Simon Ser
350e557c3f
edid: check extension block count field
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The ensures the EDID hasn't been truncated.
Signed-off-by: Simon Ser <contact@emersion.fr>
2022-06-01 12:51:26 +00:00
Simon Ser
ef4661147e
edid: validate extension block tag
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Skip any extension block with an unsupported tag to make sure we don't
return a bogus enum value to the user.
Signed-off-by: Simon Ser <contact@emersion.fr>
References: https://gitlab.freedesktop.org/emersion/libdisplay-info/-/merge_requests/16#note_1396993
2022-05-25 11:32:59 +02:00
Simon Ser
a20fda18dd
edid: check that the blob size is divisible by the block size
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This is something edid-decode does, and this ensures we don't miss
any byte when parsing the blob.
Signed-off-by: Simon Ser <contact@emersion.fr>
2022-05-24 06:14:20 +00:00
Simon Ser
ad8038fdec
edid: use hex offsets
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This is what the specification uses. Makes it easier to compare the
code to the spec.
No functional change, this is purely a cosmetic change.
Signed-off-by: Simon Ser <contact@emersion.fr>
2022-05-20 09:21:49 +00:00
Simon Ser
1c0f7497f5
edid: add low-level API to enumerate extension blocks
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Signed-off-by: Simon Ser <contact@emersion.fr>
2022-05-09 14:33:58 +02:00
Simon Ser
882d34cebb
edid: add vendor and product identification data
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Signed-off-by: Simon Ser <contact@emersion.fr>
2022-05-09 14:33:58 +02:00
Simon Ser
ad1e3f4167
Add very basic EDID functions
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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>
2022-05-05 16:42:10 +02:00
