[why]
Some DP2.0 RX requires us to set MST_EN even for SST configuration.
We added this debug option so we can configure this temporary workaround
for the RX.
Reviewed-by: George Shen <george.shen@amd.com>
Acked-by: Agustin Gutierrez Sanchez <agustin.gutierrez@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
do_fallback = true;
#if defined(CONFIG_DRM_AMD_DC_DCN)
+ /*
+ * Temporary w/a to get DP2.0 link rates to work with SST.
+ * TODO DP2.0 - Workaround: Remove w/a if and when the issue is resolved.
+ */
if (dp_get_link_encoding_format(&link_settings) == DP_128b_132b_ENCODING &&
- pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT) {
+ pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT &&
+ link->dc->debug.set_mst_en_for_sst) {
dp_enable_mst_on_sink(link, true);
}
#endif
#if defined(CONFIG_DRM_AMD_DC_DCN)
/* TODO - remove once tested */
bool legacy_dp2_lt;
+ bool set_mst_en_for_sst;
#endif
union mem_low_power_enable_options enable_mem_low_power;
union root_clock_optimization_options root_clock_optimization;