drm/amd/display: Bug in dce_is_panel_backlight_on()
[Why] dce_is_panel_backlight_on() will return wrong value if LVTMA_BLON_OVRD is 0 [How] When LVTMA_BLON_OVRD is 0, read LVTMA_PWRSEQ_TARGET_STATE instead Signed-off-by: NPeikang Zhang <peikang.zhang@amd.com> Reviewed-by: NAnthony Koo <Anthony.Koo@amd.com> Acked-by: NQingqing Zhuo <qingqing.zhuo@amd.com> Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
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