diff options
| author |   Jimmy Kizito <Jimmy.Kizito@amd.com> | 2021-04-09 22:23:53 -0400 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2021-05-10 18:10:08 -0400 |
| commit | 573a0a03af025304342ff80d0653ad7ef11524f0 (patch) | |
| tree | 80375a54f981d148b40fe646159a549c9589d5ce /drivers/gpu/drm/amd/display/dc | |
| parent | drm/amd/display: Add fallback and abort paths for DP link training. (diff) | |
| download | linux-dev-573a0a03af025304342ff80d0653ad7ef11524f0.tar.xz linux-dev-573a0a03af025304342ff80d0653ad7ef11524f0.zip | |
drm/amd/display: Expand DP module training API.
[Why & How]
Add functionality useful for DP link training to public interface.
Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 10 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h | 7 |
2 files changed, 12 insertions, 5 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index dd95d002e156..46a1d8109e9e 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -1175,7 +1175,7 @@ static inline enum link_training_result perform_link_training_int( return status; } -static enum link_training_result check_link_loss_status( +enum link_training_result dp_check_link_loss_status( struct dc_link *link, const struct link_training_settings *link_training_setting) { @@ -1309,7 +1309,7 @@ static void initialize_training_settings( lt_settings->enhanced_framing = 1; } -static uint8_t convert_to_count(uint8_t lttpr_repeater_count) +uint8_t dp_convert_to_count(uint8_t lttpr_repeater_count) { switch (lttpr_repeater_count) { case 0x80: // 1 lttpr repeater @@ -1378,7 +1378,7 @@ static void configure_lttpr_mode_non_transparent(struct dc_link *link) link->dpcd_caps.lttpr_caps.mode = repeater_mode; } - repeater_cnt = convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt); + repeater_cnt = dp_convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt); for (repeater_id = repeater_cnt; repeater_id > 0; repeater_id--) { aux_interval_address = DP_TRAINING_AUX_RD_INTERVAL_PHY_REPEATER1 + @@ -1605,7 +1605,7 @@ enum link_training_result dc_link_dp_perform_link_training( /* 2. perform link training (set link training done * to false is done as well) */ - repeater_cnt = convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt); + repeater_cnt = dp_convert_to_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt); for (repeater_id = repeater_cnt; (repeater_id > 0 && status == LINK_TRAINING_SUCCESS); repeater_id--) { @@ -1648,7 +1648,7 @@ enum link_training_result dc_link_dp_perform_link_training( */ if (link->connector_signal != SIGNAL_TYPE_EDP && status == LINK_TRAINING_SUCCESS) { msleep(5); - status = check_link_loss_status(link, <_settings); + status = dp_check_link_loss_status(link, <_settings); } /* 6. print status message*/ diff --git a/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h b/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h index 38e6fbf1e26d..428842511c03 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h +++ b/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h @@ -97,5 +97,12 @@ void dp_set_dsc_on_stream(struct pipe_ctx *pipe_ctx, bool enable); bool dp_update_dsc_config(struct pipe_ctx *pipe_ctx); bool dp_set_dsc_on_rx(struct pipe_ctx *pipe_ctx, bool enable); +/* Convert PHY repeater count read from DPCD uint8_t. */ +uint8_t dp_convert_to_count(uint8_t lttpr_repeater_count); + +/* Check DPCD training status registers to detect link loss. */ +enum link_training_result dp_check_link_loss_status( + struct dc_link *link, + const struct link_training_settings *link_training_setting); #endif /* __DC_LINK_DP_H__ */ |