From: Sekhar Nori Date: Wed, 17 May 2017 08:15:17 +0000 (+0530) Subject: usb: gadget: f_uac2: calculate wMaxPacketSize before endpoint match X-Git-Tag: v4.13-rc1~185^2~23^2~52 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0db56e43359c47ff184ceaf8b04b664d997bff88;p=platform%2Fkernel%2Flinux-exynos.git usb: gadget: f_uac2: calculate wMaxPacketSize before endpoint match Calculate wMaxPacketSize before endpoint matching the descriptor is found. This allows audio gadget to be used with controllers which have a shortage or unavailability of endpoints that can handle max packet size of 1023 (FS) or 1024 (HS). With this audio gadget can be used on TI's OMAP-L138 SoC which has a MUSB HS controller with endpoints having max packet size much less than 1023 or 1024. See mode_2_cfg in drivers/usb/musb/musb_core.c Signed-off-by: Sekhar Nori Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c index f6a0d3a..5a7ba05 100644 --- a/drivers/usb/gadget/function/f_uac2.c +++ b/drivers/usb/gadget/function/f_uac2.c @@ -1065,6 +1065,12 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) agdev->as_in_intf = ret; agdev->as_in_alt = 0; + /* Calculate wMaxPacketSize according to audio bandwidth */ + set_ep_max_packet_size(uac2_opts, &fs_epin_desc, 1000, true); + set_ep_max_packet_size(uac2_opts, &fs_epout_desc, 1000, false); + set_ep_max_packet_size(uac2_opts, &hs_epin_desc, 8000, true); + set_ep_max_packet_size(uac2_opts, &hs_epout_desc, 8000, false); + agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc); if (!agdev->out_ep) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); @@ -1080,12 +1086,6 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) uac2->p_prm.uac2 = uac2; uac2->c_prm.uac2 = uac2; - /* Calculate wMaxPacketSize according to audio bandwidth */ - set_ep_max_packet_size(uac2_opts, &fs_epin_desc, 1000, true); - set_ep_max_packet_size(uac2_opts, &fs_epout_desc, 1000, false); - set_ep_max_packet_size(uac2_opts, &hs_epin_desc, 8000, true); - set_ep_max_packet_size(uac2_opts, &hs_epout_desc, 8000, false); - hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;