diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/link')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c index b1b11eb0f9bb..ef8739df91bc 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c @@ -208,6 +208,25 @@ void dp_handle_link_loss(struct dc_link *link) } } +static void read_dpcd204h_on_irq_hpd(struct dc_link *link, union hpd_irq_data *irq_data) +{ + enum dc_status retval; + union lane_align_status_updated dpcd_lane_status_updated; + + retval = core_link_read_dpcd( + link, + DP_LANE_ALIGN_STATUS_UPDATED, + &dpcd_lane_status_updated.raw, + sizeof(union lane_align_status_updated)); + + if (retval == DC_OK) { + irq_data->bytes.lane_status_updated.bits.EQ_INTERLANE_ALIGN_DONE_128b_132b = + dpcd_lane_status_updated.bits.EQ_INTERLANE_ALIGN_DONE_128b_132b; + irq_data->bytes.lane_status_updated.bits.CDS_INTERLANE_ALIGN_DONE_128b_132b = + dpcd_lane_status_updated.bits.CDS_INTERLANE_ALIGN_DONE_128b_132b; + } +} + enum dc_status dp_read_hpd_rx_irq_data( struct dc_link *link, union hpd_irq_data *irq_data) @@ -249,6 +268,13 @@ enum dc_status dp_read_hpd_rx_irq_data( irq_data->bytes.lane23_status.raw = tmp[DP_LANE2_3_STATUS_ESI - DP_SINK_COUNT_ESI]; irq_data->bytes.lane_status_updated.raw = tmp[DP_LANE_ALIGN_STATUS_UPDATED_ESI - DP_SINK_COUNT_ESI]; irq_data->bytes.sink_status.raw = tmp[DP_SINK_STATUS_ESI - DP_SINK_COUNT_ESI]; + + /* + * This display doesn't have correct values in DPCD200Eh. + * Read and check DPCD204h instead. + */ + if (link->wa_flags.read_dpcd204h_on_irq_hpd) + read_dpcd204h_on_irq_hpd(link, irq_data); } return retval; |