[PATCH 07/33] drm/amd/display: set dig fifo read start level to 7 before dig fifo reset

From: Wang Fudong [Why] DIG_FIFO_ERROR = 1 caused mst daisy chain 2nd monitor black. [How] We need to set dig fifo read start level = 7 before dig fifo reset during dig fifo enable according to hardware designer's suggestion. If it is zero, it will cause underflow or overflow and DIG_FIFO_ERROR

[PATCH 07/33] drm/amd/display: set dig fifo read start level to 7 before dig fifo reset

From: Wang Fudong [Why] DIG_FIFO_ERROR = 1 caused mst daisy chain 2nd monitor black. [How] We need to set dig fifo read start level = 7 before dig fifo reset during dig fifo enable according to hardware designer's suggestion. If it is zero, it will cause underflow or overflow and DIG_FIFO_ERROR