From: Swapnil Patel Date: Wed, 4 Oct 2023 19:58:57 +0000 (-0400) Subject: drm/amd/display: Reduce default backlight min from 5 nits to 1 nits X-Git-Tag: v6.7-rc1~145^2^2~33 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5edb7cdff85af8f8c5fda5b88310535ab823f663;p=thirdparty%2Fkernel%2Flinux.git drm/amd/display: Reduce default backlight min from 5 nits to 1 nits [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 Acked-by: Roman Li Signed-off-by: Swapnil Patel Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- 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 938df1f0f7dab..86f97ddcc5954 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,