drm/i915/lvds: Restore initial HW state during encoder enabling

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Atm the LVDS encoder depends on the PPS HW context being saved/restored
from generic suspend/resume code. Since the PPS is specific to the LVDS
and eDP encoders a cleaner way is to reinitialize it during encoder
enabling, so do this here for LVDS. Follow-up patches will init the PPS
for the eDP encoder similarly and remove the suspend/resume time save /
restore.

v2:
- Apply BSpec +1 offset and use DIV_ROUND_UP() when programming the
power cycle delay. (Ville)
v3: (Ville)
- Fix +1 vs. round-up order.
- s/reset_on_powerdown/powerdown_on_reset/

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470827254-21954-3-git-send-email-imre.deak@intel.com

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This commit is contained in:

Imre Deak 2016-08-10 14:07:31 +03:00

parent 5a162e229a

commit ed6143b8f7

2 changed files with 102 additions and 13 deletions

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1

drivers/gpu/drm/i915/i915_reg.h

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114

drivers/gpu/drm/i915/intel_lvds.c

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