Meenakshikumar Somasundaram 6f4f8ff567 drm/amd/display: Display does not light up after S4 resume ... [Why] Dpia hpd interrupt processing is disabled when entering S4/S0i3 and would be reenabled after detection completes during resuming. Because, keeping hpd interrupts enabled during detection leads to multiple detections for the same hpd transition. There is a S4 case where dpia hpd interrupt is missed when driver is in transitioning from hpd interrupt processing disable to enable and the display does not light up. [How] - Added dmub inbox command DMUB_CMD__DPIA_HPD_INT_ENABLE to explicitly control dmub to issue dpia hpd interrupt or not. If dpia hpd interrupt is disabled, dmub will keep the hpd pending and post it once driver reenables dpia hpd interrupt or when querying with DMUB_CMD__QUERY_HPD_STATE. - Added dmub boot option dpia_hpd_int_enable_supported to notify dmub about whether DMUB_CMD__DPIA_HPD_INT_ENABLE command would be used. Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Reviewed-by: Mustapha Ghaddar <Mustapha.Ghaddar@amd.com> Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com> Signed-off-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>		2022-10-10 17:32:55 -04:00
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drm	drm/amd/display: Display does not light up after S4 resume	2022-10-10 17:32:55 -04:00
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