[PATCH 12/16] drm/amd/display: turn off eDP lcdvdd and backlight if not required
Roman.Li at amd.com
Roman.Li at amd.com
Wed Apr 2 16:13:16 UTC 2025
From: Charlene Liu <Charlene.Liu at amd.com>
[why]
A+N configuration, eDP on A-APU is off, extended display active.
Resume from s4, eDP's backlight is still on.
[how]
Turn off inactive eDP backlight and lcdvdd.
Reviewed-by: Charlene Liu <charlene.liu at amd.com>
Reviewed-by: Aric Cyr <aric.cyr at amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu at amd.com>
Signed-off-by: Jing Zhou <Jing.Zhou at amd.com>
Signed-off-by: Roman Li <roman.li at amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 4 ++--
.../amd/display/dc/link/protocols/link_edp_panel_control.c | 2 ++
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 636999fcaebb..66e23507eb82 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -6298,10 +6298,10 @@ void dc_query_current_properties(struct dc *dc, struct dc_current_properties *pr
void dc_set_edp_power(const struct dc *dc, struct dc_link *edp_link,
bool powerOn)
{
- if (edp_link->connector_signal != SIGNAL_TYPE_EDP)
+ if (!edp_link || !edp_link->dc || !edp_link->dc->link_srv)
return;
- if (edp_link->skip_implict_edp_power_control == false)
+ if (edp_link->connector_signal != SIGNAL_TYPE_EDP)
return;
edp_link->dc->link_srv->edp_set_panel_power(edp_link, powerOn);
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c
index da74c2b5854f..f50c4dbc7553 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c
@@ -393,6 +393,7 @@ void edp_set_panel_power(struct dc_link *link, bool powerOn)
// 3. Rx power on
dpcd_write_rx_power_ctrl(link, true);
+ DC_LOG_BACKLIGHT("eDP power and backlight: Power on");
} else {
// 3. Rx power off
dpcd_write_rx_power_ctrl(link, false);
@@ -404,6 +405,7 @@ void edp_set_panel_power(struct dc_link *link, bool powerOn)
// 1. panel VDD off
if (!link->dc->config.edp_no_power_sequencing)
link->dc->hwss.edp_power_control(link, false);
+ DC_LOG_BACKLIGHT("eDP power and backlight: Power off");
}
}
--
2.34.1
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