From: Jingwen Zhu <Jingwen.Zhu@xxxxxxx>
[Why]
The eDP retrain will cause the DPCD 300 to be reset to default.
And cause the brightness can't be set correctly.
[How]
delete the call to edp panel power control in both
enable_link_output/disable_link_output entirely and
only call edp panel control in enable_link_dp and
disable_link_dp once.
Reviewed-by: Charlene Liu <Charlene.Liu@xxxxxxx>
Acked-by: Qingqing Zhuo <qingqing.zhuo@xxxxxxx>
Signed-off-by: Jingwen Zhu <Jingwen.Zhu@xxxxxxx>
---
.../display/dc/dce110/dce110_hw_sequencer.c | 19 +++++++++++--------
.../gpu/drm/amd/display/dc/link/link_dpms.c | 5 +++++
2 files changed, 16 insertions(+), 8 deletions(-)
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 9fe0ce91db00..8d2460d06bce 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -3031,10 +3031,12 @@ void dce110_enable_dp_link_output(
const struct link_hwss *link_hwss = get_link_hwss(link, link_res);
unsigned int i;
-
+ /*
+ * Add the logic to extract BOTH power up and power down sequences
+ * from enable/disable link output and only call edp panel control
+ * in enable_link_dp and disable_link_dp once.
+ */
if (link->connector_signal == SIGNAL_TYPE_EDP) {
- if (!link->dc->config.edp_no_power_sequencing)
- link->dc->hwss.edp_power_control(link, true);
link->dc->hwss.edp_wait_for_hpd_ready(link, true);
}
@@ -3096,11 +3098,12 @@ void dce110_disable_link_output(struct dc_link *link,
link_hwss->disable_link_output(link, link_res, signal);
link->phy_state.symclk_state = SYMCLK_OFF_TX_OFF;
-
- if (signal == SIGNAL_TYPE_EDP &&
- link->dc->hwss.edp_backlight_control)
- link->dc->hwss.edp_power_control(link, false);
- else if (dmcu != NULL && dmcu->funcs->lock_phy)
+ /*
+ * Add the logic to extract BOTH power up and power down sequences
+ * from enable/disable link output and only call edp panel control
+ * in enable_link_dp and disable_link_dp once.
+ */
+ if (dmcu != NULL && dmcu->funcs->lock_phy)
dmcu->funcs->unlock_phy(dmcu);
dc->link_srv->dp_trace_source_sequence(link, DPCD_SOURCE_SEQ_AFTER_DISABLE_LINK_PHY);
}
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
index 027ad1f0144d..2267fb097830 100644
--- a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
@@ -1927,6 +1927,11 @@ static void disable_link_dp(struct dc_link *link,
dp_disable_link_phy(link, link_res, signal);
+ if (link->connector_signal == SIGNAL_TYPE_EDP) {
+ if (!link->dc->config.edp_no_power_sequencing)
+ link->dc->hwss.edp_power_control(link, false);
+ }
+
if (signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
/* set the sink to SST mode after disabling the link */
enable_mst_on_sink(link, false);
--
2.34.1
