drm/i915/display/mtl: Program latch to phy reset

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Latch reset of phys during DC9 and when driver is unloaded to avoid
phy reset.

Specification ask us to program it closer to the step that enables
DC9 in DC_STATE_EN but doing this way allow us to sanitize the phy
latch during driver load.

BSpec: 49197
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230301201053.928709-6-radhakrishna.sripada@intel.com

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José Roberto de Souza 2023-03-01 12:10:53 -08:00 • committed by Radhakrishna Sripada

parent 561b31acfd

commit c4298d1577

2 changed files with 10 additions and 0 deletions

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8

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

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2

drivers/gpu/drm/i915/i915_reg.h

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