UPSTREAM: usb: dwc2: rockchip: Make the max_transfer_size automatic

Previously we needed to set the max_transfer_size to explicitly be 65535
because the old driver would detect that our hardware could support much
bigger transfers and then would try to do them.  This wouldn't work
since the DMA alignment code couldn't support it.

Later in commit e8f8c14d9da7 ("usb: dwc2: clip max_transfer_size to
65535") upstream added support for clipping this automatically.  Since
that commit it has been OK to just use "-1" (default), but nobody
bothered to change it.

Let's change it to default now for two reasons:
- It's nice to use autodetected params.
- If we can remove the 65535 limit, we can transfer more!

Change-Id: I020c984ac4edf32488743d4daa0e24168f3152c0
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: John Youn <johnyoun@synopsys.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Huang, Tao <huangtao@rock-chips.com>
(cherry picked from commit 40eed7d78378f1f609680a8a891a50cce12ed612)

diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index 3993ff392916d0c218abbf18ce614ac62c4a37ad..13b7162513a4e1b89026f5dfb1c9bce22a55ff7f 100644 (file)
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -129,7 +129,7 @@ static const struct dwc2_core_params params_rk3066 = {
        .host_rx_fifo_size              = 520,  /* 520 DWORDs */
        .host_nperio_tx_fifo_size       = 128,  /* 128 DWORDs */
        .host_perio_tx_fifo_size        = 256,  /* 256 DWORDs */
-       .max_transfer_size              = 65535,
+       .max_transfer_size              = -1,
        .max_packet_count               = -1,
        .host_channels                  = -1,
        .phy_type                       = -1,