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Commit 46637565 authored by Minas Harutyunyan's avatar Minas Harutyunyan Committed by Felipe Balbi
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usb: dwc2: gadget: Reject LPM token during Control transfers 



Avoiding switch to L1 state in any stage of control transfers.
Send NYET handshake to LPM token.

Renamed GLPMCFG_LPM_ACCEPT_CTRL_ISOC to GLPMCFG_LPM_REJECT_CTRL_CONTROL
because by setting this bit core reject LPM token.

Signed-off-by: default avatarMinas Harutyunyan <hminas@synopsys.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent 7a6127e3

drivers/usb/dwc2/gadget.c

+1 −0
Original line number Diff line number Diff line
@@ -5073,6 +5073,7 @@ void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg) 
	val |= hsotg->params.lpm_clock_gating ? GLPMCFG_ENBLSLPM : 0;

	val |= hsotg->params.hird_threshold << GLPMCFG_HIRD_THRES_SHIFT;

	val |= hsotg->params.besl ? GLPMCFG_ENBESL : 0;

	val |= GLPMCFG_LPM_REJECT_CTRL_CONTROL;

	val |= GLPMCFG_LPM_ACCEPT_CTRL_ISOC;

	dwc2_writel(hsotg, val, GLPMCFG);

	dev_dbg(hsotg->dev, "GLPMCFG=0x%08x\n", dwc2_readl(hsotg, GLPMCFG));

drivers/usb/dwc2/hw.h

+1 −1
Original line number Diff line number Diff line
@@ -333,7 +333,7 @@ 
#define GLPMCFG_SNDLPM			BIT(24)

#define GLPMCFG_RETRY_CNT_MASK		(0x7 << 21)

#define GLPMCFG_RETRY_CNT_SHIFT		21

#define GLPMCFG_LPM_ACCEPT_CTRL_CONTROL	BIT(21)

#define GLPMCFG_LPM_REJECT_CTRL_CONTROL	BIT(21)

#define GLPMCFG_LPM_ACCEPT_CTRL_ISOC	BIT(22)

#define GLPMCFG_LPM_CHNL_INDX_MASK	(0xf << 17)

#define GLPMCFG_LPM_CHNL_INDX_SHIFT	17