drm/i915/dp: Helper for checking DDI_BUF_CTL Idle status

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Modify the helper to add a fixed delay or poll with timeout
based on platform specification to check for either Idle bit
set (DDI_BUF_CTL is idle for disable case)

v2:
* Use 2 separate functions or idle and active (Ville)
v3:
* Change the timeout to 16usecs (Ville)
v4:
* Change the timeout 8, follow spec (Ville)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200701221052.8946-1-manasi.d.navare@intel.com

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This commit is contained in:

Manasi Navare 2020-07-01 15:10:51 -07:00

parent 9459fd5945

commit 5a2ad99bce

1 changed files with 8 additions and 9 deletions

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

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