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drm/amd/display: Expand DP module training API.

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[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>
This commit is contained in:
Jimmy Kizito
2021-04-09 22:23:53 -04:00
committed by Alex Deucher
parent 8225367130
commit 573a0a03af
2 changed files with 12 additions and 5 deletions
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10
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
View File

@@ -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, &lt_settings);
status = dp_check_link_loss_status(link, &lt_settings);
}
/* 6. print status message*/

7
drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h
View File

@@ -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__ */