On Thu, 8 Sept 2022 at 18:38, Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx> wrote: > > DOWNSPREAD_CTRL (0x107) shall be cleared to 0 upon power-on reset or an > upstream device disconnect. This patch will enforce this rule by always > cleared DOWNSPREAD_CTRL register to 0 before start link training. At rare > case that DP MSA timing parameters may be mis-interpreted by the sink > which causes audio sampling rate be calculated wrongly and cause audio > did not work at sink if DOWNSPREAD_CTRL register is not cleared to 0. > This patch also make sure bring sink out of D3 power-down mode into D0 > (normal operation mode) successfully by retrying 3 times. Split into three separate patches please. -- With best wishes Dmitry
