diff options
| author | Jimmy Kizito <[email protected]> | 2021-04-01 12:59:54 -0400 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2021-05-10 18:09:45 -0400 |
| commit | 99732e52e7f8115d505d88f78f27c48281078f66 (patch) | |
| tree | ce7d3922cb6a56d9ef7b9ba0a275d79033a47598 | |
| parent | 011907fda3605177f4fc05bf08fcf0fceaabda49 (diff) | |
drm/amd/display: Update DPRX detection.
[Why]
Some extra provisions are required during DPRX detection for links which
lack physical HPD and AUX/DDC pins.
[How]
Avoid attempting to access nonexistent physical pins during DPRX
detection.
Signed-off-by: Jimmy Kizito <[email protected]>
Reviewed-by: Jun Lei <[email protected]>
Acked-by: Stylon Wang <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link.c | 27 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_link.h | 1 |
2 files changed, 25 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index 3fb0cebd6938..a2e7747ee387 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -247,6 +247,16 @@ bool dc_link_detect_sink(struct dc_link *link, enum dc_connection_type *type) link->dc->hwss.edp_wait_for_hpd_ready(link, true); } + /* Link may not have physical HPD pin. */ + if (link->ep_type != DISPLAY_ENDPOINT_PHY) { + if (link->hpd_status) + *type = dc_connection_single; + else + *type = dc_connection_none; + + return true; + } + /* todo: may need to lock gpio access */ hpd_pin = get_hpd_gpio(link->ctx->dc_bios, link->link_id, link->ctx->gpio_service); @@ -432,8 +442,18 @@ bool dc_link_is_dp_sink_present(struct dc_link *link) static enum signal_type link_detect_sink(struct dc_link *link, enum dc_detect_reason reason) { - enum signal_type result = get_basic_signal_type(link->link_enc->id, - link->link_id); + enum signal_type result; + struct graphics_object_id enc_id; + + if (link->is_dig_mapping_flexible) + enc_id = (struct graphics_object_id){.id = ENCODER_ID_UNKNOWN}; + else + enc_id = link->link_enc->id; + result = get_basic_signal_type(enc_id, link->link_id); + + /* Use basic signal type for link without physical connector. */ + if (link->ep_type != DISPLAY_ENDPOINT_PHY) + return result; /* Internal digital encoder will detect only dongles * that require digital signal @@ -955,7 +975,8 @@ static bool dc_link_detect_helper(struct dc_link *link, case SIGNAL_TYPE_DISPLAY_PORT: { /* wa HPD high coming too early*/ - if (link->link_enc->features.flags.bits.DP_IS_USB_C == 1) { + if (link->ep_type == DISPLAY_ENDPOINT_PHY && + link->link_enc->features.flags.bits.DP_IS_USB_C == 1) { /* if alt mode times out, return false */ if (!wait_for_entering_dp_alt_mode(link)) return false; diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h index 054bab45ee17..41a09eaea576 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_link.h +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -113,6 +113,7 @@ struct dc_link { /* TODO: Rename. Flag an endpoint as having a programmable mapping to a * DIG encoder. */ bool is_dig_mapping_flexible; + bool hpd_status; /* HPD status of link without physical HPD pin. */ bool edp_sink_present; |