While enabling undefined length INCR burst type and INCR16 burst type, get better write performance on NXP Layerscape platform: around 3% improvement (from 364MB/s to 375MB/s). Signed-off-by: Changming Huang <jerry.huang@xxxxxxx> Signed-off-by: Rajesh Bhagat <rajesh.bhagat@xxxxxxx> --- drivers/usb/dwc3/core.c | 6 ++++++ drivers/usb/dwc3/core.h | 13 +++++++++++++ 2 files changed, 19 insertions(+) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index fea4469..0e11891 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -621,6 +621,12 @@ static int dwc3_core_init(struct dwc3 *dwc) goto err0; } + /* Enable Undefined Length INCR Burst Type and Enable INCR16 Burst */ + reg = dwc3_readl(dwc->regs, DWC3_GSBUSCFG0); + reg &= ~DWC3_GSBUSCFG0_INCRBRSTMASK; + reg |= DWC3_GSBUSCFG0_INCR16BRSTENA | DWC3_GSBUSCFG0_INCRBRSTENA; + dwc3_writel(dwc->regs, DWC3_GSBUSCFG0, reg); + /* * Write Linux Version Code to our GUID register so it's easy to figure * out which kernel version a bug was found. diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 6b60e42..8bfdb77 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -156,6 +156,19 @@ /* Bit fields */ +/* Global SoC Bus Configuration Register 0 */ +#define DWC3_GSBUSCFG0_DATABIGEND (1 << 11) +#define DWC3_GSBUSCFG0_DESCBIGEND (1 << 10) +#define DWC3_GSBUSCFG0_INCR256BRSTENA (1 << 7) +#define DWC3_GSBUSCFG0_INCR128BRSTENA (1 << 6) +#define DWC3_GSBUSCFG0_INCR64BRSTENA (1 << 5) +#define DWC3_GSBUSCFG0_INCR32BRSTENA (1 << 4) +#define DWC3_GSBUSCFG0_INCR16BRSTENA (1 << 3) +#define DWC3_GSBUSCFG0_INCR8BRSTENA (1 << 2) +#define DWC3_GSBUSCFG0_INCR4BRSTENA (1 << 1) +#define DWC3_GSBUSCFG0_INCRBRSTENA (1 << 0) +#define DWC3_GSBUSCFG0_INCRBRSTMASK 0xff + /* Global Debug Queue/FIFO Space Available Register */ #define DWC3_GDBGFIFOSPACE_NUM(n) ((n) & 0x1f) #define DWC3_GDBGFIFOSPACE_TYPE(n) (((n) << 5) & 0x1e0) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
