drm/mgag200: Move DAC-register setup into model-specific code
Provide an init function for each model's DAC registers. Remove
the shared helper.
The code for initializing the DAC registers consisted of a large
table of default value, plus many exceptions for the various G200
models. Providing a per-model implementation makes if more readable.
At some point, some of the initialization should probably move into
the modesetting code.
v2:
* don't duplicate DAC values unnecessarily (Sam, Jocelyn)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Tested-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220728124103.30159-3-tzimmermann@suse.de
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