Commit 6e93d5b0 authored by Jimmy Kizito's avatar Jimmy Kizito Committed by Alex Deucher
Browse files

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



[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: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: default avatarMartin Leung <Martin.Leung@amd.com>
Acked-by: default avatarTom Chung <chiahsuan.chung@amd.com>
Signed-off-by: default avatarJimmy Kizito <Jimmy.Kizito@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 7e8906dc

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

+7 −1
Original line number Diff line number Diff line
@@ -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. */

drivers/gpu/drm/amd/display/dc/dc.h

+17 −0
Original line number Diff line number Diff line
@@ -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;

};