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dtrm/edid: Allow comma separated edid binaries. (v3)

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Allow comma separated filenames in the edid_firmware parameter.

For example:

edid_firmware=eDP-1:edid/1280x480.bin,DP-2:edid/1920x1080.bin

v2: Use strsep() to simplify parsing of comma seperated string. (Matt)
    Move initial bail before strdup. (Matt)
v3: Changed conditionals after while loop to make more readable (Jani)
    Updated kernel-parameters.txt to reflect changes (Jani)

Reviewed-by: Jani Nikula <[email protected]>
Reviewed-by: Matt Roper <[email protected]>
Signed-off-by: Bob Paauwe <[email protected]>
[danvet: Flatten else control flow and appease checkpatch.]
Signed-off-by: Daniel Vetter <[email protected]>
This commit is contained in:
Bob Paauwe 2015-08-27 10:04:13 -07:00 • committed by Daniel Vetter
commit 96206e2922
2 changed files with 42 additions and 14 deletions
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15
Documentation/kernel-parameters.txt
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@ -927,11 +927,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
The filter can be disabled or changed to another
driver later using sysfs.
drm_kms_helper.edid_firmware=[<connector>:]<file>
Broken monitors, graphic adapters and KVMs may
send no or incorrect EDID data sets. This parameter
allows to specify an EDID data set in the
/lib/firmware directory that is used instead.
drm_kms_helper.edid_firmware=[<connector>:]<file>[,[<connector>:]<file>]
Broken monitors, graphic adapters, KVMs and EDIDless
panels may send no or incorrect EDID data sets.
This parameter allows to specify an EDID data sets
in the /lib/firmware directory that are used instead.
Generic built-in EDID data sets are used, if one of
edid/1024x768.bin, edid/1280x1024.bin,
edid/1680x1050.bin, or edid/1920x1080.bin is given
@ -940,7 +940,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
available in Documentation/EDID/HOWTO.txt. An EDID
data set will only be used for a particular connector,
if its name and a colon are prepended to the EDID
name.
name. Each connector may use a unique EDID data
set by separating the files with a comma. An EDID
data set with no connector name will be used for
any connectors not explicitly specified.
dscc4.setup= [NET]