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drm/i915/dp: Keep cached LTTPR mode up-to-date
author
Imre Deak
<imre.deak@intel.com>
Mon, 8 Jul 2024 19:00:27 +0000
(22:00 +0300)
committer
Imre Deak
<imre.deak@intel.com>
Thu, 11 Jul 2024 18:12:13 +0000
(21:12 +0300)
Nothing depends on the cached LTTPR mode, however for consistency keep
it up-to-date with the value programmed to the DPCD register.
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link:
https://patchwork.freedesktop.org/patch/msgid/20240708190029.271247-5-imre.deak@intel.com
drivers/gpu/drm/i915/display/intel_dp_link_training.c
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diff --git
a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
index
56b9c5c
..
af0b71b
100644
(file)
--- a/
drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/
drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@
-114,7
+114,13
@@
intel_dp_set_lttpr_transparent_mode(struct intel_dp *intel_dp, bool enable)
u8 val = enable ? DP_PHY_REPEATER_MODE_TRANSPARENT :
DP_PHY_REPEATER_MODE_NON_TRANSPARENT;
- return drm_dp_dpcd_write(&intel_dp->aux, DP_PHY_REPEATER_MODE, &val, 1) == 1;
+ if (drm_dp_dpcd_write(&intel_dp->aux, DP_PHY_REPEATER_MODE, &val, 1) != 1)
+ return false;
+
+ intel_dp->lttpr_common_caps[DP_PHY_REPEATER_MODE -
+ DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV] = val;
+
+ return true;
}
static bool intel_dp_lttpr_transparent_mode_enabled(struct intel_dp *intel_dp)