drm/i915/fbc: Precompute gen9 cfb stride w/a

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Precompute the override cfb stride value so that we can check
it when determining if flip nuke can be used or not.

The hardware has 13 bits for this, so we can shrink the storage
to u16 while at it.

v2: Don't explode when crtc_state->enable_fbc lies to us

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191127201222.16669-6-ville.syrjala@linux.intel.com
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

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This commit is contained in:

Ville Syrjälä 2019-11-27 22:12:13 +02:00

parent 644398586f

commit 6f745ba696

2 changed files with 26 additions and 15 deletions

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38

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

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3

drivers/gpu/drm/i915/i915_drv.h

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