drm/i915/display: Increase AUX timeout for Type-C

Type-C PHYs are taking longer than expected for Aux IO Power Enabling.
Workaround: Increase the timeout.

---v2
-change style on how we mention WA [Ankit]
-fix bat error by creating new func that is only called for aux power
well scenarios so we can avoid null pointer error as it is called
everywhere.

--v3
-Add non-default enable_timeout to power well descriptor which avoids
adding more platform checks [Imre]

--v4
-Remove Bspec link from top to bottom remove WA link from commit put it
on comment [Jani]
-enable_timeout in ms and add .fixed_enable_delay too [Imre]

--v5
-move power_wells instead of duplicating them [Imre]

Bspec: 55480

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230418131425.1285088-1-suraj.kandpal@intel.com

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.h b/drivers/gpu/drm/i915/display/intel_display_power_well.h
index ba7cb977e7c7..e494df379e6c 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_well.h
+++ b/drivers/gpu/drm/i915/display/intel_display_power_well.h
@@ -110,6 +110,8 @@ struct i915_power_well_desc {
 	 * Thunderbolt mode.
 	 */
 	u16 is_tc_tbt:1;
+	/* Enable timeout if greater than the default 1ms */
+	u16 enable_timeout;
 };
 
 struct i915_power_well {