drm/i915/dmc_wl: Get wakelock when disabling dynamic DC states

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Bspec says that disabling dynamic DC states require taking the DMC
wakelock to cause an DC exit before writing to DC_STATE_EN. Implement
that.

In fact, testing on PTL revealed we end up failing to exit DC5/6 without
this step.

Bspec: 71583
Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241108130218.24125-6-gustavo.sousa@intel.com

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Gustavo Sousa 2024-11-08 09:57:10 -03:00 • committed by Matt Roper

parent f7b12bf296

commit 7a522aa6cf

3 changed files with 21 additions and 5 deletions

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10

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

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14

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

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2

drivers/gpu/drm/i915/display/intel_dmc_wl.h

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