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drm/amd/display: Add configuration options for AUX wake work around.

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[Why]
Work around to try to wake unresponsive DP sinks may need to be adjusted
for certain sinks.

[How]
Add options to disable work around or adjust time spent trying to wake
unresponsive DPRX.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jimmy Kizito 2022-03-22 19:12:47 -04:00 committed by Alex Deucher
parent 7e8906dc26
commit 6e93d5b033
2 changed files with 24 additions and 1 deletions
drivers/gpu/drm/amd/display/dc
core
dc_link_dp.c
dc.h

8
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
View File

@ -5308,7 +5308,13 @@ static bool retrieve_link_cap(struct dc_link *link)
LINK_AUX_DEFAULT_LTTPR_TIMEOUT_PERIOD);
/* Try to ensure AUX channel active before proceeding. */
status = wa_try_to_wake_dprx(link, LINK_AUX_WAKE_TIMEOUT_MS);
if (link->dc->debug.aux_wake_wa.bits.enable_wa) {
uint64_t timeout_ms = link->dc->debug.aux_wake_wa.bits.timeout_ms;
if (link->dc->debug.aux_wake_wa.bits.use_default_timeout)
timeout_ms = LINK_AUX_WAKE_TIMEOUT_MS;
status = wa_try_to_wake_dprx(link, timeout_ms);
}
is_lttpr_present = dp_retrieve_lttpr_cap(link);
/* Read DP tunneling information. */

17
drivers/gpu/drm/amd/display/dc/dc.h
View File

@ -526,6 +526,22 @@ union dpia_debug_options {
uint32_t raw;
};
/* AUX wake work around options
* 0: enable/disable work around
* 1: use default timeout LINK_AUX_WAKE_TIMEOUT_MS
* 15-2: reserved
* 31-16: timeout in ms
*/
union aux_wake_wa_options {
struct {
uint32_t enable_wa : 1;
uint32_t use_default_timeout : 1;
uint32_t rsvd: 14;
uint32_t timeout_ms : 16;
} bits;
uint32_t raw;
};
struct dc_debug_data {
uint32_t ltFailCount;
uint32_t i2cErrorCount;
@ -712,6 +728,7 @@ struct dc_debug_options {
#endif
bool apply_vendor_specific_lttpr_wa;
bool extended_blank_optimization;
union aux_wake_wa_options aux_wake_wa;
bool ignore_dpref_ss;
uint8_t psr_power_use_phy_fsm;
};