On Fri, Jun 18, 2021 at 1:46 PM Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx> wrote:
>
> This patch is used to relax bandwidth schedule by allowing multiple
> Start-Split in the same microframe.
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
Reviewed-and-Tested-by: Ikjoon Jang <ikjn@xxxxxxxxxxxx>
> ---
> v2: fix build warning unused-but-set-variable
> ---
> drivers/usb/host/xhci-mtk-sch.c | 18 ------------------
> drivers/usb/host/xhci-mtk.h | 2 --
> 2 files changed, 20 deletions(-)
>
> diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c
> index c07411d9b16f..cffcaf4dfa9f 100644
> --- a/drivers/usb/host/xhci-mtk-sch.c
> +++ b/drivers/usb/host/xhci-mtk-sch.c
> @@ -470,11 +470,9 @@ static int check_fs_bus_bw(struct mu3h_sch_ep_info *sch_ep, int offset)
>
> static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset)
> {
> - struct mu3h_sch_tt *tt = sch_ep->sch_tt;
> u32 extra_cs_count;
> u32 start_ss, last_ss;
> u32 start_cs, last_cs;
> - int i;
>
> if (!sch_ep->sch_tt)
> return 0;
> @@ -491,10 +489,6 @@ static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset)
> if (!(start_ss == 7 || last_ss < 6))
> return -ESCH_SS_Y6;
>
> - for (i = 0; i < sch_ep->cs_count; i++)
> - if (test_bit(offset + i, tt->ss_bit_map))
> - return -ESCH_SS_OVERLAP;
> -
> } else {
> u32 cs_count = DIV_ROUND_UP(sch_ep->maxpkt, FS_PAYLOAD_MAX);
>
> @@ -521,9 +515,6 @@ static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset)
> if (cs_count > 7)
> cs_count = 7; /* HW limit */
>
> - if (test_bit(offset, tt->ss_bit_map))
> - return -ESCH_SS_OVERLAP;
> -
> sch_ep->cs_count = cs_count;
> /* one for ss, the other for idle */
> sch_ep->num_budget_microframes = cs_count + 2;
> @@ -544,11 +535,9 @@ 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 bits;
> int i, j;
>
> num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
> - bits = (sch_ep->ep_type == ISOC_OUT_EP) ? sch_ep->cs_count : 1;
>
> if (used)
> bw_updated = sch_ep->bw_cost_per_microframe;
> @@ -558,13 +547,6 @@ static void update_sch_tt(struct mu3h_sch_ep_info *sch_ep, bool used)
> for (i = 0; i < num_esit; i++) {
> base = sch_ep->offset + i * sch_ep->esit;
>
> - for (j = 0; j < bits; j++) {
> - if (used)
> - set_bit(base + j, tt->ss_bit_map);
> - else
> - clear_bit(base + j, tt->ss_bit_map);
> - }
> -
> for (j = 0; j < sch_ep->cs_count; j++)
> tt->fs_bus_bw[base + j] += bw_updated;
> }
> diff --git a/drivers/usb/host/xhci-mtk.h b/drivers/usb/host/xhci-mtk.h
> index cd3a37bb73e6..390cb5a86082 100644
> --- a/drivers/usb/host/xhci-mtk.h
> +++ b/drivers/usb/host/xhci-mtk.h
> @@ -24,12 +24,10 @@
> #define XHCI_MTK_MAX_ESIT 64
>
> /**
> - * @ss_bit_map: used to avoid start split microframes overlay
> * @fs_bus_bw: array to keep track of bandwidth already used for FS
> * @ep_list: Endpoints using this TT
> */
> struct mu3h_sch_tt {
> - DECLARE_BITMAP(ss_bit_map, XHCI_MTK_MAX_ESIT);
> u32 fs_bus_bw[XHCI_MTK_MAX_ESIT];
> struct list_head ep_list;
> };
> --
> 2.18.0
>
