diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c index a5765f36d86f..1b7a8774b0c9 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c @@ -34,6 +34,7 @@ #include "dm_helpers.h" #include "dmub/inc/dmub_cmd.h" #include "inc/link_dpcd.h" +#include "dc_dmub_srv.h" #define DC_LOGGER \ link->ctx->logger @@ -69,6 +70,24 @@ enum dc_status dpcd_get_tunneling_device_data(struct dc_link *link) return status; } +bool dc_link_dpia_query_hpd_status(struct dc_link *link) +{ + union dmub_rb_cmd cmd = {0}; + struct dc_dmub_srv *dmub_srv = link->ctx->dmub_srv; + bool is_hpd_high = false; + + /* prepare QUERY_HPD command */ + cmd.query_hpd.header.type = DMUB_CMD__QUERY_HPD_STATE; + cmd.query_hpd.data.instance = link->link_id.enum_id - ENUM_ID_1; + cmd.query_hpd.data.ch_type = AUX_CHANNEL_DPIA; + + /* Return HPD status reported by DMUB if query successfully executed. */ + if (dc_dmub_srv_cmd_with_reply_data(dmub_srv, &cmd) && cmd.query_hpd.data.status == AUX_RET_SUCCESS) + is_hpd_high = cmd.query_hpd.data.result; + + return is_hpd_high; +} + /* Configure link as prescribed in link_setting; set LTTPR mode; and * Initialize link training settings. * Abort link training if sink unplug detected. |