diff options
| author | Wesley Cheng <quic_wcheng@quicinc.com> | 2025-04-09 12:47:39 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-11 13:02:30 +0200 |
| commit | 8da7644493b4cad0db294b9bd213c7b1d3523cff (patch) | |
| tree | 3f3e2959d065f4b9a300a6746dc579c5be04f3b7 /drivers/usb/dwc3/core.c | |
| parent | b85a2ebda1034881d09e6127726dc78950669474 (diff) | |
usb: dwc3: Specify maximum number of XHCI interrupters
Allow for the DWC3 host driver to pass along XHCI property that defines
how many interrupters to allocate. This is in relation for the number of
event rings that can be potentially used by other processors within the
system.
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Tested-by: Puma Hsu <pumahsu@google.com>
Tested-by: Daehwan Jung <dh10.jung@samsung.com>
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20250409194804.3773260-7-quic_wcheng@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc3/core.c')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 66a08b527165..17ae5c13fe36 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1699,6 +1699,7 @@ static void dwc3_get_properties(struct dwc3 *dwc) u8 tx_thr_num_pkt_prd = 0; u8 tx_max_burst_prd = 0; u8 tx_fifo_resize_max_num; + u16 num_hc_interrupters; /* default to highest possible threshold */ lpm_nyet_threshold = 0xf; @@ -1719,6 +1720,9 @@ static void dwc3_get_properties(struct dwc3 *dwc) */ tx_fifo_resize_max_num = 6; + /* default to a single XHCI interrupter */ + num_hc_interrupters = 1; + dwc->maximum_speed = usb_get_maximum_speed(dev); dwc->max_ssp_rate = usb_get_maximum_ssp_rate(dev); dwc->dr_mode = usb_get_dr_mode(dev); @@ -1765,6 +1769,12 @@ static void dwc3_get_properties(struct dwc3 *dwc) &tx_thr_num_pkt_prd); device_property_read_u8(dev, "snps,tx-max-burst-prd", &tx_max_burst_prd); + device_property_read_u16(dev, "num-hc-interrupters", + &num_hc_interrupters); + /* DWC3 core allowed to have a max of 8 interrupters */ + if (num_hc_interrupters > 8) + num_hc_interrupters = 8; + dwc->do_fifo_resize = device_property_read_bool(dev, "tx-fifo-resize"); if (dwc->do_fifo_resize) @@ -1851,6 +1861,8 @@ static void dwc3_get_properties(struct dwc3 *dwc) dwc->tx_max_burst_prd = tx_max_burst_prd; dwc->tx_fifo_resize_max_num = tx_fifo_resize_max_num; + + dwc->num_hc_interrupters = num_hc_interrupters; } /* check whether the core supports IMOD */ |