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[ Upstream commit cbb4c9bc55 ]
[Description]
- When disabling a phantom pipe, we first enable the phantom
OTG so the double buffer update can successfully take place
- However, want to avoid locking the phantom otherwise setting
DPG_EN=1 for the phantom pipe is blocked (without this we could
hit underflow due to phantom HUBP being blanked by default)
Reviewed-by: Samson Tam <samson.tam@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Alvin Lee <alvin.lee2@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>