Commit 451d3912 authored by Chunfeng Yun's avatar Chunfeng Yun Committed by Greg Kroah-Hartman
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usb: xhci-mtk: update fs bus bandwidth by bw_budget_table 



Use @bw_budget_table[] to update fs bus bandwidth due to
not all microframes consume @bw_cost_per_microframe, see
setup_sch_info().

Signed-off-by: default avatarChunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1629189389-18779-6-git-send-email-chunfeng.yun@mediatek.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent de5107f4

drivers/usb/host/xhci-mtk-sch.c

+7 −10
Original line number Diff line number Diff line
@@ -458,8 +458,8 @@ static int check_fs_bus_bw(struct mu3h_sch_ep_info *sch_ep, int offset) 
		 * Compared with hs bus, no matter what ep type,

		 * the hub will always delay one uframe to send data

		 */

		for (j = 0; j < sch_ep->cs_count; j++) {

			tmp = tt->fs_bus_bw[base + j] + sch_ep->bw_cost_per_microframe;

		for (j = 0; j < sch_ep->num_budget_microframes; j++) {

			tmp = tt->fs_bus_bw[base + j] + sch_ep->bw_budget_table[j];

			if (tmp > FS_PAYLOAD_MAX)

				return -ESCH_BW_OVERFLOW;

		}
@@ -534,21 +534,18 @@ static void update_sch_tt(struct mu3h_sch_ep_info *sch_ep, bool used) 
{

	struct mu3h_sch_tt *tt = sch_ep->sch_tt;

	u32 base, num_esit;

	int bw_updated;

	int i, j;



	num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;



	if (used)

		bw_updated = sch_ep->bw_cost_per_microframe;

	else

		bw_updated = -sch_ep->bw_cost_per_microframe;



	for (i = 0; i < num_esit; i++) {

		base = sch_ep->offset + i * sch_ep->esit;



		for (j = 0; j < sch_ep->cs_count; j++)

			tt->fs_bus_bw[base + j] += bw_updated;

		for (j = 0; j < sch_ep->num_budget_microframes; j++)

			if (used)

				tt->fs_bus_bw[base + j] += sch_ep->bw_budget_table[j];

			else

				tt->fs_bus_bw[base + j] -= sch_ep->bw_budget_table[j];

	}



	if (used)