From: Swapnil Patel Date: Thu, 17 Aug 2023 18:04:26 +0000 (-0400) Subject: drm/amd/display: Don't check registers, if using AUX BL control X-Git-Tag: v6.6.17~3922^2~2^2~10 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f5b2c10b57615828b531bb0ae56bd6325a41167e;p=platform%2Fkernel%2Flinux-rpi.git drm/amd/display: Don't check registers, if using AUX BL control [Why] Currently the driver looks DCN registers to access if BL is on or not. This check is not valid if we are using AUX based brightness control. This causes driver to not send out "backlight off" command during power off sequence as it already thinks it is off. [How] Only check DCN registers if we aren't using AUX based brightness control. Reviewed-by: Wenjing Liu Acked-by: Stylon Wang Signed-off-by: Swapnil Patel Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- 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 ad967b5..478281f 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 @@ -964,7 +964,9 @@ void dce110_edp_backlight_control( return; } - if (link->panel_cntl) { + if (link->panel_cntl && !(link->dpcd_sink_ext_caps.bits.oled || + link->dpcd_sink_ext_caps.bits.hdr_aux_backlight_control == 1 || + link->dpcd_sink_ext_caps.bits.sdr_aux_backlight_control == 1)) { bool is_backlight_on = link->panel_cntl->funcs->is_panel_backlight_on(link->panel_cntl); if ((enable && is_backlight_on) || (!enable && !is_backlight_on)) {