From: Michael Strauss <michael.strauss@xxxxxxx>
[WHY]
32ms delay was added to resolve issue with a specific sink, however this same
delay also introduces erroneous link training failures with certain sink
devices.
[HOW]
Only apply the 32ms delay for offending devices instead of globally.
Reviewed-by: Jun Lei <Jun.Lei@xxxxxxx>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
Signed-off-by: Michael Strauss <michael.strauss@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dc.h | 1 -
drivers/gpu/drm/amd/display/dc/dc_types.h | 1 +
.../link_dp_training_fixed_vs_pe_retimer.c | 17 +++++++++++------
3 files changed, 12 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index b45974a2dec3..97747f5fde56 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -855,7 +855,6 @@ struct dc_debug_options {
bool force_usr_allow;
/* uses value at boot and disables switch */
bool disable_dtb_ref_clk_switch;
- uint32_t fixed_vs_aux_delay_config_wa;
bool extended_blank_optimization;
union aux_wake_wa_options aux_wake_wa;
uint32_t mst_start_top_delay;
diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h
index 34c848311455..150c19286d67 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_types.h
@@ -196,6 +196,7 @@ struct dc_panel_patch {
unsigned int disable_fams;
unsigned int skip_avmute;
unsigned int mst_start_top_delay;
+ unsigned int delay_disable_aux_intercept_ms;
};
struct dc_edid_caps {
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.c
index 5731c4b61f9f..fb6c938c6dab 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_fixed_vs_pe_retimer.c
@@ -233,7 +233,8 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence_legacy(
link->dpcd_caps.lttpr_caps.phy_repeater_cnt);
const uint8_t vendor_lttpr_write_data_intercept_en[4] = {0x1, 0x55, 0x63, 0x0};
const uint8_t vendor_lttpr_write_data_intercept_dis[4] = {0x1, 0x55, 0x63, 0x68};
- uint32_t pre_disable_intercept_delay_ms = link->dc->debug.fixed_vs_aux_delay_config_wa;
+ uint32_t pre_disable_intercept_delay_ms =
+ link->local_sink->edid_caps.panel_patch.delay_disable_aux_intercept_ms;
uint8_t vendor_lttpr_write_data_vs[4] = {0x1, 0x51, 0x63, 0x0};
uint8_t vendor_lttpr_write_data_pe[4] = {0x1, 0x52, 0x63, 0x0};
uint32_t vendor_lttpr_write_address = 0xF004F;
@@ -259,7 +260,7 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence_legacy(
/* Certain display and cable configuration require extra delay */
if (offset > 2)
- pre_disable_intercept_delay_ms = link->dc->debug.fixed_vs_aux_delay_config_wa * 2;
+ pre_disable_intercept_delay_ms = pre_disable_intercept_delay_ms * 2;
}
/* Vendor specific: Reset lane settings */
@@ -380,7 +381,8 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence_legacy(
0);
/* Vendor specific: Disable intercept */
for (i = 0; i < max_vendor_dpcd_retries; i++) {
- msleep(pre_disable_intercept_delay_ms);
+ if (pre_disable_intercept_delay_ms != 0)
+ msleep(pre_disable_intercept_delay_ms);
dpcd_status = core_link_write_dpcd(
link,
vendor_lttpr_write_address,
@@ -591,9 +593,11 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence(
const uint8_t vendor_lttpr_write_data_adicora_eq1[4] = {0x1, 0x55, 0x63, 0x2E};
const uint8_t vendor_lttpr_write_data_adicora_eq2[4] = {0x1, 0x55, 0x63, 0x01};
const uint8_t vendor_lttpr_write_data_adicora_eq3[4] = {0x1, 0x55, 0x63, 0x68};
- uint32_t pre_disable_intercept_delay_ms = link->dc->debug.fixed_vs_aux_delay_config_wa;
uint8_t vendor_lttpr_write_data_vs[4] = {0x1, 0x51, 0x63, 0x0};
uint8_t vendor_lttpr_write_data_pe[4] = {0x1, 0x52, 0x63, 0x0};
+ uint32_t pre_disable_intercept_delay_ms =
+ link->local_sink->edid_caps.panel_patch.delay_disable_aux_intercept_ms;
+
uint32_t vendor_lttpr_write_address = 0xF004F;
enum link_training_result status = LINK_TRAINING_SUCCESS;
@@ -618,7 +622,7 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence(
/* Certain display and cable configuration require extra delay */
if (offset > 2)
- pre_disable_intercept_delay_ms = link->dc->debug.fixed_vs_aux_delay_config_wa * 2;
+ pre_disable_intercept_delay_ms = pre_disable_intercept_delay_ms * 2;
}
/* Vendor specific: Reset lane settings */
@@ -739,7 +743,8 @@ enum link_training_result dp_perform_fixed_vs_pe_training_sequence(
0);
/* Vendor specific: Disable intercept */
for (i = 0; i < max_vendor_dpcd_retries; i++) {
- msleep(pre_disable_intercept_delay_ms);
+ if (pre_disable_intercept_delay_ms != 0)
+ msleep(pre_disable_intercept_delay_ms);
dpcd_status = core_link_write_dpcd(
link,
vendor_lttpr_write_address,
--
2.39.2
