torvalds/linux
torvalds/linux
2
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-09-04 20:19:47 +08:00
Code

drm/amd/display: turn off eDP lcdvdd and backlight if not required

Browse Source 
[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@amd.com>
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Jing Zhou <Jing.Zhou@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Charlene Liu 2025-03-26 17:11:35 +08:00 committed by Alex Deucher
parent 32be4e39f4
commit 0d93e82186
2 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/amd/display/dc/core/dc.c
View File

@ -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);

2
drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c
View File

@ -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");
}
}