struct dc_link *link,
const uint8_t rate)
{
- uint8_t toggle_rate = 0x0;
+ if (link->apply_vendor_specific_lttpr_link_rate_wa) {
+ uint8_t toggle_rate = 0x0;
- if (rate == 0x6)
- toggle_rate = 0xA;
- else
- toggle_rate = 0x6;
+ if (rate == 0x6)
+ toggle_rate = 0xA;
+ else
+ toggle_rate = 0x6;
- if (link->vendor_specific_lttpr_link_rate_wa == rate) {
- /* W/A for certain LTTPR to reset internal state for link training */
- core_link_write_dpcd(
- link,
- DP_LINK_BW_SET,
- &toggle_rate,
- 1);
- }
+ if (link->vendor_specific_lttpr_link_rate_wa == rate) {
+ /* W/A for certain LTTPR to reset internal state for link training */
+ core_link_write_dpcd(
+ link,
+ DP_LINK_BW_SET,
+ &toggle_rate,
+ 1);
+ }
- /* Store the last attempted link rate for this link */
- link->vendor_specific_lttpr_link_rate_wa = rate;
+ /* Store the last attempted link rate for this link */
+ link->vendor_specific_lttpr_link_rate_wa = rate;
+ }
}
static void vendor_specific_lttpr_wa_three(
/* reset previous training states */
if (link->dc->debug.apply_vendor_specific_lttpr_wa &&
(link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) &&
- link->lttpr_mode == LTTPR_MODE_TRANSPARENT)
+ link->lttpr_mode == LTTPR_MODE_TRANSPARENT) {
+ link->apply_vendor_specific_lttpr_link_rate_wa = true;
vendor_specific_lttpr_wa_four(link, true);
- else
+ } else {
dpcd_exit_training_mode(link);
+ }
/* configure link prior to entering training mode */
dpcd_configure_lttpr_mode(link, <_settings);
/* exit training mode */
if (link->dc->debug.apply_vendor_specific_lttpr_wa &&
(link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) &&
- link->lttpr_mode == LTTPR_MODE_TRANSPARENT)
+ link->lttpr_mode == LTTPR_MODE_TRANSPARENT) {
+ link->apply_vendor_specific_lttpr_link_rate_wa = false;
vendor_specific_lttpr_wa_four(link, (status != LINK_TRAINING_SUCCESS));
- else
+ } else {
dpcd_exit_training_mode(link);
+ }
/* switch to video idle */
if ((status == LINK_TRAINING_SUCCESS) || !skip_video_pattern)