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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-08-30 16:06:38 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-08-30 16:06:38 -0700 |
| commit | 1ac731c529cd4d6adbce134754b51ff7d822b145 (patch) | |
| tree | 143ab3f35ca5f3b69f583c84e6964b17139c2ec1 /drivers/usb/cdns3/cdns3-gadget.c | |
| parent | 07b4c950f27bef0362dc6ad7ee713aab61d58149 (diff) | |
| parent | 54116d442e001e1b6bd482122043b1870998a1f3 (diff) | |
Merge branch 'next' into for-linus
Prepare input updates for 6.6 merge window.
Diffstat (limited to 'drivers/usb/cdns3/cdns3-gadget.c')
| -rw-r--r-- | drivers/usb/cdns3/cdns3-gadget.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c index ccfaebca6faa..1dcadef933e3 100644 --- a/drivers/usb/cdns3/cdns3-gadget.c +++ b/drivers/usb/cdns3/cdns3-gadget.c @@ -2097,6 +2097,19 @@ int cdns3_ep_config(struct cdns3_endpoint *priv_ep, bool enable) else priv_ep->trb_burst_size = 16; + /* + * In versions preceding DEV_VER_V2, for example, iMX8QM, there exit the bugs + * in the DMA. These bugs occur when the trb_burst_size exceeds 16 and the + * address is not aligned to 128 Bytes (which is a product of the 64-bit AXI + * and AXI maximum burst length of 16 or 0xF+1, dma_axi_ctrl0[3:0]). This + * results in data corruption when it crosses the 4K border. The corruption + * specifically occurs from the position (4K - (address & 0x7F)) to 4K. + * + * So force trb_burst_size to 16 at such platform. + */ + if (priv_dev->dev_ver < DEV_VER_V2) + priv_ep->trb_burst_size = 16; + mult = min_t(u8, mult, EP_CFG_MULT_MAX); buffering = min_t(u8, buffering, EP_CFG_BUFFERING_MAX); maxburst = min_t(u8, maxburst, EP_CFG_MAXBURST_MAX); |