drm/i915: Program plane gamma ramps

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All sprite planes have a progammable gamma ramp. Set it up with
a linear ramp on all platforms. This actually matches the reset
value but soon we'll want to reprogram this ramp on some machines,
so let's just set it up across the board.

Note that on pre-IVB the hardware bypasses the gamma unit
unless a YCbCr pixel format is used.

v2: Add parens around << in ilk_linear_gamma()
    Skip gamma programming for RGB on pre-IVB
    s/DVSGAMC/DVSGAMC_G4X/

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190703200824.5971-4-ville.syrjala@linux.intel.com

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This commit is contained in:

Ville Syrjälä 2019-07-03 23:08:21 +03:00

parent 423ee8e99a

commit 94e15723df

2 changed files with 166 additions and 7 deletions

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142

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

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31

drivers/gpu/drm/i915/i915_reg.h

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