I do wonder if the division by 100 is right though - and where does the +1 come from?
Please review carefully, this change is more of an open question at the moment.
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I do wonder if the division by 100 is right though - and where does the +1 come from?
In regards to EDID 1.4 data format Wikipedia says:
23 | Display gamma, factory default (range 1.00–3.54), datavalue = (gamma×100)-100 = (gamma−1)×100. If 225, gamma is defined by DI-EXT block.
https://en.wikipedia.org/wiki/Extended_Display_Identification_Data#EDID_1.4_data_format
=> gamma = datavalue / 100 + 1