From: Swapnil Patel <swapnil.patel@xxxxxxx>
[Why & How]
Currently set_default_brightness_aux function uses 5 nits as lower limit
to check for valid default_backlight setting. However some newer panels
can support even lower default settings
Reviewed-by: Agustin Gutierrez <agustin.gutierrez@xxxxxxx>
Acked-by: Roman Li <roman.li@xxxxxxx>
Signed-off-by: Swapnil Patel <swapnil.patel@xxxxxxx>
---
.../amd/display/dc/link/protocols/link_edp_panel_control.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
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 938df1f0f7da..86f97ddcc595 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
@@ -283,8 +283,8 @@ bool set_default_brightness_aux(struct dc_link *link)
if (link && link->dpcd_sink_ext_caps.bits.oled == 1) {
if (!read_default_bl_aux(link, &default_backlight))
default_backlight = 150000;
- // if < 5 nits or > 5000, it might be wrong readback
- if (default_backlight < 5000 || default_backlight > 5000000)
+ // if < 1 nits or > 5000, it might be wrong readback
+ if (default_backlight < 1000 || default_backlight > 5000000)
default_backlight = 150000; //
return edp_set_backlight_level_nits(link, true,
--
2.34.1
