drm/i915: Fix g4x+ sprite dotclock limit for upscaling

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Even if we're not doing downscaling we should account for
some of the extra dotclock limitations for g4x+ sprites. In
particular we must never exceed the 90% rule, and with RGB
that limits actually drops to 80%.

So instead of bailing out when upscaling let's clamp the
scaling factor appropriately and go through the rest of
calculation normally. By luck we already did the full
calculations for the 1:1 case.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200206201204.31704-1-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

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Ville Syrjälä 2020-02-06 22:12:03 +02:00

parent 8dec2fc11b

commit 23d3e3799f

1 changed files with 1 additions and 2 deletions

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drivers/gpu/drm/i915/display/intel_sprite.c

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