This chip can not handle aux defer if the host directly program its aux registers to access edid/dpcd. So we need let software to handle the aux defer situation.
Signed-off-by: Jason Yen <[email protected]> --- drivers/gpu/drm/bridge/parade-ps8640.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c index 31e88cb39f8a..967dec840b91 100644 --- a/drivers/gpu/drm/bridge/parade-ps8640.c +++ b/drivers/gpu/drm/bridge/parade-ps8640.c @@ -303,6 +303,14 @@ static ssize_t ps8640_aux_transfer_msg(struct drm_dp_aux *aux, case SWAUX_STATUS_ACKM: len = data & SWAUX_M_MASK; break; + case SWAUX_STATUS_DEFER: + case SWAUX_STATUS_I2C_DEFER: + if (is_native_aux) + msg->reply |= DP_AUX_NATIVE_REPLY_DEFER; + else + msg->reply |= DP_AUX_I2C_REPLY_DEFER; + len = data & SWAUX_M_MASK; + break; case SWAUX_STATUS_INVALID: return -EOPNOTSUPP; case SWAUX_STATUS_TIMEOUT: -- 2.34.1
