[why]
Previously used value was not safe to provide the correct value, i.e. it
could be 0 if not not configured, leading to no MST on this platform.
[how]
Do not use the value from BIOS, but from the structure populated at
encoder initialization time.
Fixes: 98025a62cb00 ("drm/dp_mst: Use Extended Base Receiver Capability DPCD
space")
Signed-off-by: Nikola Cornij <nikola.cor...@amd.com>
Reviewed-by: Lyude Paul <ly...@redhat.com>
---
drivers/gpu/drm/i915/display/intel_dp_mst.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c
b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index bf7f8487945c..3642d7578658 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -942,7 +942,7 @@ intel_dp_mst_encoder_init(struct intel_digital_port
*dig_port, int conn_base_id)
struct intel_dp *intel_dp = &dig_port->dp;
enum port port = dig_port->base.port;
int ret;
- int bios_max_link_rate;
+ int max_source_rate = intel_dp->source_rates[intel_dp->num_source_rates
- 1];
if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp))
return 0;
@@ -957,11 +957,11 @@ intel_dp_mst_encoder_init(struct intel_digital_port
*dig_port, int conn_base_id)
/* create encoders */
intel_dp_create_fake_mst_encoders(dig_port);
- bios_max_link_rate = intel_bios_dp_max_link_rate(&dig_port->base);
ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm,
&intel_dp->aux, 16, 3,
(u8)dig_port->max_lanes,
- (u8)(bios_max_link_rate / 27000),
conn_base_id);
+ (u8)(max_source_rate / 27000),
+ conn_base_id);
if (ret)
return ret;
--
2.25.1
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