From: Felipe Balbi <balbi@ti.com> To: Roger Quadros <rogerq@ti.com> Cc: <balbi@ti.com>, <tony@atomide.com>, <Joao.Pinto@synopsys.com>, <sergei.shtylyov@cogentembedded.com>, <peter.chen@freescale.com>, <jun.li@freescale.com>, <linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-omap@vger.kernel.org> Subject: Re: [PATCH v4 1/9] usb: dwc3: add dual-role support Date: Thu, 3 Sep 2015 10:44:44 -0500 [thread overview] Message-ID: <20150903154444.GA4031@saruman.tx.rr.com> (raw) In-Reply-To: <55E83B5C.7050001@ti.com> [-- Attachment #1: Type: text/plain, Size: 2325 bytes --] Hi, On Thu, Sep 03, 2015 at 03:21:48PM +0300, Roger Quadros wrote: > >> + dwc->fsm->id = id; > >> + dwc->fsm->b_sess_vld = vbus; > >> + usb_otg_sync_inputs(dwc->fsm); > >> +} > >> + > >> +static int dwc3_drd_start_host(struct otg_fsm *fsm, int on) > >> +{ > >> + struct device *dev = usb_otg_fsm_to_dev(fsm); > >> + struct dwc3 *dwc = dev_get_drvdata(dev); > > > > how about adding a usb_otg_get_drvdata(fsm) ? > > You meant for otg core? That can be done. yeah. BTW, I think otg core needs quite a few changes to become actually useful. Currently it's just too much pointer ping-pong going back and forth between phy, otg core, udc and hcd. Also, I caught a ton of issues with it and suspend/resume. You might want to fix them before adding more users to it. It's also rather racy and that needs fixing too. On top of all that, I think there's too much being added to UDC just to get Dual-Role, let's see if we can improve that too. > >> @@ -843,6 +998,16 @@ static int dwc3_probe(struct platform_device *pdev) > >> hird_threshold = 12; > >> > >> if (node) { > >> + if (of_property_read_bool(node, "extcon")) > >> + dwc->edev = extcon_get_edev_by_phandle(dev, 0); > >> + else if (of_property_read_bool(dev->parent->of_node, "extcon")) > >> + dwc->edev = extcon_get_edev_by_phandle(dev->parent, 0); > > > > why do you need to check the parent ? Why isn't that done on the glue > > layer ? > > On DRA7-evm, the extcon device is defined in the glue layer node. But > we need the device both at the glue layer and at the core layer. why do you need extcon here ? Glue updates core via UTMI about the states, right ? So you should get proper VBUS and ID status via OTG IRQ. Is that not working ? > We do get the extcon device in dwc3-omap.c > > Any suggestion how to pass the extcon device from glue layer to core.c? > Or should I add the extcon property to dwc3 USB node as well in the DT? GPIO toggles dwc3-omap extcon event update status via UTMI STATUS register OTG IRQ on core Horray! :-) > >> + > >> + if (IS_ERR(dwc->edev)) { > >> + dev_vdbg(dev, "couldn't get extcon device\n"); > > > > dev_err() ?? > > Is it ok to print it even in EPROBE_DEFER case? hmm, probably pointless, indeed. -- balbi [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 819 bytes --]
WARNING: multiple messages have this Message-ID (diff)
From: Felipe Balbi <balbi@ti.com> To: Roger Quadros <rogerq@ti.com> Cc: balbi@ti.com, tony@atomide.com, Joao.Pinto@synopsys.com, sergei.shtylyov@cogentembedded.com, peter.chen@freescale.com, jun.li@freescale.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org Subject: Re: [PATCH v4 1/9] usb: dwc3: add dual-role support Date: Thu, 3 Sep 2015 10:44:44 -0500 [thread overview] Message-ID: <20150903154444.GA4031@saruman.tx.rr.com> (raw) In-Reply-To: <55E83B5C.7050001@ti.com> [-- Attachment #1: Type: text/plain, Size: 2325 bytes --] Hi, On Thu, Sep 03, 2015 at 03:21:48PM +0300, Roger Quadros wrote: > >> + dwc->fsm->id = id; > >> + dwc->fsm->b_sess_vld = vbus; > >> + usb_otg_sync_inputs(dwc->fsm); > >> +} > >> + > >> +static int dwc3_drd_start_host(struct otg_fsm *fsm, int on) > >> +{ > >> + struct device *dev = usb_otg_fsm_to_dev(fsm); > >> + struct dwc3 *dwc = dev_get_drvdata(dev); > > > > how about adding a usb_otg_get_drvdata(fsm) ? > > You meant for otg core? That can be done. yeah. BTW, I think otg core needs quite a few changes to become actually useful. Currently it's just too much pointer ping-pong going back and forth between phy, otg core, udc and hcd. Also, I caught a ton of issues with it and suspend/resume. You might want to fix them before adding more users to it. It's also rather racy and that needs fixing too. On top of all that, I think there's too much being added to UDC just to get Dual-Role, let's see if we can improve that too. > >> @@ -843,6 +998,16 @@ static int dwc3_probe(struct platform_device *pdev) > >> hird_threshold = 12; > >> > >> if (node) { > >> + if (of_property_read_bool(node, "extcon")) > >> + dwc->edev = extcon_get_edev_by_phandle(dev, 0); > >> + else if (of_property_read_bool(dev->parent->of_node, "extcon")) > >> + dwc->edev = extcon_get_edev_by_phandle(dev->parent, 0); > > > > why do you need to check the parent ? Why isn't that done on the glue > > layer ? > > On DRA7-evm, the extcon device is defined in the glue layer node. But > we need the device both at the glue layer and at the core layer. why do you need extcon here ? Glue updates core via UTMI about the states, right ? So you should get proper VBUS and ID status via OTG IRQ. Is that not working ? > We do get the extcon device in dwc3-omap.c > > Any suggestion how to pass the extcon device from glue layer to core.c? > Or should I add the extcon property to dwc3 USB node as well in the DT? GPIO toggles dwc3-omap extcon event update status via UTMI STATUS register OTG IRQ on core Horray! :-) > >> + > >> + if (IS_ERR(dwc->edev)) { > >> + dev_vdbg(dev, "couldn't get extcon device\n"); > > > > dev_err() ?? > > Is it ok to print it even in EPROBE_DEFER case? hmm, probably pointless, indeed. -- balbi [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 819 bytes --]
next prev parent reply other threads:[~2015-09-03 16:00 UTC|newest] Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-09-02 14:24 [PATCH v4 0/9] usb: dwc3: add dual-role support Roger Quadros 2015-09-02 14:24 ` Roger Quadros 2015-09-02 14:24 ` [PATCH v4 1/9] " Roger Quadros 2015-09-02 14:24 ` Roger Quadros 2015-09-02 14:31 ` Felipe Balbi 2015-09-02 14:31 ` Felipe Balbi 2015-09-03 12:21 ` Roger Quadros 2015-09-03 12:21 ` Roger Quadros 2015-09-03 15:44 ` Felipe Balbi [this message] 2015-09-03 15:44 ` Felipe Balbi 2015-09-04 9:06 ` Roger Quadros 2015-09-04 9:06 ` Roger Quadros 2015-09-07 9:42 ` Roger Quadros 2015-09-07 9:42 ` Roger Quadros 2015-09-06 2:02 ` Peter Chen 2015-09-06 2:02 ` Peter Chen 2015-09-07 9:39 ` Roger Quadros 2015-09-07 9:39 ` Roger Quadros 2015-09-02 14:24 ` [PATCH v4 2/9] usb: dwc3: core.h: add some register definitions Roger Quadros 2015-09-02 14:24 ` Roger Quadros 2015-09-02 14:24 ` [PATCH v4 3/9] usb: dwc3: dwc3-omap: Make the wrapper interrupt shared Roger Quadros 2015-09-02 14:24 ` Roger Quadros 2015-09-02 14:32 ` Felipe Balbi 2015-09-02 14:32 ` Felipe Balbi 2015-09-02 14:24 ` [PATCH v4 4/9] usb: dwc3: core: Adapt to named interrupts Roger Quadros 2015-09-02 14:24 ` Roger Quadros 2015-09-02 14:34 ` Felipe Balbi 2015-09-02 14:34 ` Felipe Balbi 2015-09-03 12:46 ` Roger Quadros 2015-09-03 12:46 ` Roger Quadros 2015-09-03 15:48 ` Felipe Balbi 2015-09-03 15:48 ` Felipe Balbi 2015-09-04 9:11 ` Roger Quadros 2015-09-04 9:11 ` Roger Quadros 2015-09-02 14:24 ` [PATCH v4 5/9] usb: dwc3: core: make dual-role work with OTG irq Roger Quadros 2015-09-02 14:24 ` Roger Quadros 2015-09-02 14:43 ` Felipe Balbi 2015-09-02 14:43 ` Felipe Balbi 2015-09-03 13:52 ` Roger Quadros 2015-09-03 13:52 ` Roger Quadros 2015-09-03 15:51 ` Felipe Balbi 2015-09-03 15:51 ` Felipe Balbi 2015-09-04 9:13 ` Roger Quadros 2015-09-04 9:13 ` Roger Quadros 2015-09-06 2:20 ` Peter Chen 2015-09-06 2:20 ` Peter Chen 2015-09-15 14:46 ` Roger Quadros 2015-09-15 14:46 ` Roger Quadros 2015-09-02 14:24 ` [PATCH v4 6/9] usb: dwc3: save/restore OTG registers during suspend/resume Roger Quadros 2015-09-02 14:24 ` Roger Quadros 2015-09-02 14:44 ` Felipe Balbi 2015-09-02 14:44 ` Felipe Balbi 2015-09-03 13:54 ` Roger Quadros 2015-09-03 13:54 ` Roger Quadros 2015-09-02 14:24 ` [PATCH v4 7/9] usb: dwc3: gadget: Fix suspend/resume during dual-role mode Roger Quadros 2015-09-02 14:24 ` Roger Quadros 2015-09-02 14:24 ` [PATCH v4 8/9] usb: dwc3: core: Prevent otg events from disabling themselves Roger Quadros 2015-09-02 14:24 ` Roger Quadros 2015-09-02 14:47 ` Felipe Balbi 2015-09-02 14:47 ` Felipe Balbi 2015-09-03 13:54 ` Roger Quadros 2015-09-03 13:54 ` Roger Quadros 2015-09-02 14:24 ` [PATCH v4 9/9] usb: dwc3: core: don't break during suspend/resume while we're dual-role Roger Quadros 2015-09-02 14:24 ` Roger Quadros 2015-09-02 14:48 ` Felipe Balbi 2015-09-02 14:48 ` Felipe Balbi 2015-09-03 14:02 ` Roger Quadros 2015-09-03 14:02 ` Roger Quadros 2015-09-02 17:22 ` Sergei Shtylyov 2015-09-03 14:01 ` Roger Quadros 2015-09-03 14:01 ` Roger Quadros 2015-09-03 14:05 ` Sergei Shtylyov 2015-09-03 14:05 ` Sergei Shtylyov 2015-09-03 14:10 ` Roger Quadros 2015-09-03 14:10 ` Roger Quadros 2015-09-03 14:13 ` Sergei Shtylyov
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