Dump the descriptor of the detected LTTPRs in non-transparent mode to
help the debugging related to LTTPRs easier.
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
---
.../drm/i915/display/intel_dp_link_training.c | 22 ++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
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 31089f1b316d2..52b149793f3d0 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@ -199,6 +199,24 @@ static int intel_dp_init_lttpr_phys(struct intel_dp *intel_dp, const u8 dpcd[DP_
return 0;
}
+static void intel_dp_dump_lttpr_phy_desc(struct intel_dp *intel_dp, enum drm_dp_phy dp_phy)
+{
+ struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+ struct drm_dp_dpcd_ident ident;
+
+ if (drm_dp_dpcd_read(&intel_dp->aux, DP_OUI_PHY_REPEATER(dp_phy),
+ &ident, sizeof(ident)) < 0)
+ return;
+
+ drm_dbg_kms(&i915->drm,
+ "%s: %s: OUI %*phD dev-ID %*pE HW-rev %d.%d SW-rev %d.%d\n",
+ intel_dp->aux.name, drm_dp_phy_name(dp_phy),
+ (int)sizeof(ident.oui), ident.oui,
+ (int)strnlen(ident.device_id, sizeof(ident.device_id)), ident.device_id,
+ ident.hw_rev >> 4, ident.hw_rev & 0xf,
+ ident.sw_major_rev, ident.sw_minor_rev);
+}
+
static int intel_dp_init_lttpr(struct intel_dp *intel_dp, const u8 dpcd[DP_RECEIVER_CAP_SIZE])
{
int lttpr_count;
@@ -206,8 +224,10 @@ static int intel_dp_init_lttpr(struct intel_dp *intel_dp, const u8 dpcd[DP_RECEI
lttpr_count = intel_dp_init_lttpr_phys(intel_dp, dpcd);
- for (i = 0; i < lttpr_count; i++)
+ for (i = 0; i < lttpr_count; i++) {
intel_dp_read_lttpr_phy_caps(intel_dp, dpcd, DP_PHY_LTTPR(i));
+ intel_dp_dump_lttpr_phy_desc(intel_dp, DP_PHY_LTTPR(i));
+ }
return lttpr_count;
}
--
2.43.3
