drm/amd/display: solve regression in update phy state refactor

[Why]
There is a coding error when moving dp disable link phy to
hw sequencer, where the receiver power control is missed during
this refactor.

[how]
1. Add back missing receiver power control in disable link phy.
2. minor modifications to ensure there is no undesired sequence
changes in dp link enable/disable.

Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 09630b0..9eab6f4 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -7073,9 +7073,9 @@ void dp_enable_link_phy(
        enum clock_source_id clock_source,
        const struct dc_link_settings *link_settings)
 {
+       link->cur_link_settings = *link_settings;
        link->dc->hwss.enable_dp_link_output(link, link_res, signal,
                        clock_source, link_settings);
-       link->cur_link_settings = *link_settings;
        dp_receiver_power_ctrl(link, true);
 }
 
@@ -7149,6 +7149,9 @@ void dp_disable_link_phy(struct dc_link *link, const struct link_resource *link_
 {
        struct dc  *dc = link->ctx->dc;
 
+       if (!link->wa_flags.dp_keep_receiver_powered)
+               dp_receiver_power_ctrl(link, false);
+
        dc->hwss.disable_link_output(link, link_res, signal);
        /* Clear current link setting.*/
        memset(&link->cur_link_settings, 0,

diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
index 55c98db..2341982 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -3098,6 +3098,7 @@ void dce110_enable_dp_link_output(
        if (dmcu != NULL && dmcu->funcs->unlock_phy)
                dmcu->funcs->unlock_phy(dmcu);
 
+       dp_source_sequence_trace(link, DPCD_SOURCE_SEQ_AFTER_ENABLE_LINK_PHY);
 }
 
 void dce110_disable_link_output(struct dc_link *link,
@@ -3111,7 +3112,7 @@ void dce110_disable_link_output(struct dc_link *link,
        if (signal == SIGNAL_TYPE_EDP &&
                        link->dc->hwss.edp_backlight_control)
                link->dc->hwss.edp_backlight_control(link, false);
-       else if (dc_is_dp_signal(signal) && dmcu != NULL && dmcu->funcs->lock_phy)
+       else if (dmcu != NULL && dmcu->funcs->lock_phy)
                dmcu->funcs->lock_phy(dmcu);
 
        link_hwss->disable_link_output(link, link_res, signal);
@@ -3120,8 +3121,9 @@ void dce110_disable_link_output(struct dc_link *link,
        if (signal == SIGNAL_TYPE_EDP &&
                        link->dc->hwss.edp_backlight_control)
                link->dc->hwss.edp_power_control(link, false);
-       else if (dc_is_dp_signal(signal) && dmcu != NULL && dmcu->funcs->lock_phy)
+       else if (dmcu != NULL && dmcu->funcs->lock_phy)
                dmcu->funcs->unlock_phy(dmcu);
+       dp_source_sequence_trace(link, DPCD_SOURCE_SEQ_AFTER_DISABLE_LINK_PHY);
 }
 
 static const struct hw_sequencer_funcs dce110_funcs = {