[Why]
Certain docks appear to NAK I2C writes to the segment pointer with the
MOT (middle of transaction) bit clear. This behaviour can cause EDID
reads from higher segments to fail.
[How]
Add workaround flag for links which connect to docks exhibiting this
issue.
Cc: Wayne Lin <wayne.lin@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
link->psr_settings.psr_version = DC_PSR_VERSION_UNSUPPORTED;
+ /* Some docks seem to NAK I2C writes to segment pointer with mot=0. */
+ link->wa_flags.dp_mot_reset_segment = true;
+
return true;
ddc_create_fail:
bool dp_keep_receiver_powered;
bool dp_skip_DID2;
bool dp_skip_reset_segment;
+ bool dp_mot_reset_segment;
} wa_flags;
struct link_mst_stream_allocation_table mst_stream_alloc_table;