| Message ID | 20240726-s2r-cdns-v5-7-8664bfb032ac@bootlin.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Fix USB suspend on TI J7200 (cdns3-ti, cdns3, xhci) | expand |
On 26/07/2024 21:17, Théo Lebrun wrote: > Add ti,j7200-usb compatible. Match data indicates the controller resets > on resume which tells that to the cdns3 core. This in turn silences a > xHCI warning visible in cases of unexpected resets. > > We also inherit the errata quirk CDNS3_DRD_SUSPEND_RESIDENCY_ENABLE from > the default `cdns_ti_auxdata` configuration. > > Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com> > --- > drivers/usb/cdns3/cdns3-ti.c | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/drivers/usb/cdns3/cdns3-ti.c b/drivers/usb/cdns3/cdns3-ti.c > index 159814dfc856..65b8b6f4c654 100644 > --- a/drivers/usb/cdns3/cdns3-ti.c > +++ b/drivers/usb/cdns3/cdns3-ti.c > @@ -258,7 +258,21 @@ static const struct of_dev_auxdata cdns_ti_auxdata[] = { > {}, > }; > > +static struct cdns3_platform_data cdns_ti_j7200_pdata = { > + .quirks = CDNS3_RESET_ON_RESUME | But you mentioned that the behavior can be different based on which idle state the system went into. Setting this flag will means Reset is required on every resume. Instead, you just need to rely on the runtime check and set the xhci->lost_power flag at resume. > + CDNS3_DRD_SUSPEND_RESIDENCY_ENABLE, /* Errata i2409 */ > +}; > + > +static const struct of_dev_auxdata cdns_ti_j7200_auxdata[] = { > + { > + .compatible = "cdns,usb3", > + .platform_data = &cdns_ti_j7200_pdata, > + }, > + {}, > +}; > + > static const struct of_device_id cdns_ti_of_match[] = { > + { .compatible = "ti,j7200-usb", .data = cdns_ti_j7200_auxdata }, > { .compatible = "ti,j721e-usb", .data = cdns_ti_auxdata }, > { .compatible = "ti,am64-usb", .data = cdns_ti_auxdata }, > {}, >
On Mon Aug 5, 2024 at 3:54 PM CEST, Roger Quadros wrote: > On 26/07/2024 21:17, Théo Lebrun wrote: > > Add ti,j7200-usb compatible. Match data indicates the controller resets > > on resume which tells that to the cdns3 core. This in turn silences a > > xHCI warning visible in cases of unexpected resets. > > > > We also inherit the errata quirk CDNS3_DRD_SUSPEND_RESIDENCY_ENABLE from > > the default `cdns_ti_auxdata` configuration. > > > > Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com> > > --- > > drivers/usb/cdns3/cdns3-ti.c | 14 ++++++++++++++ > > 1 file changed, 14 insertions(+) > > > > diff --git a/drivers/usb/cdns3/cdns3-ti.c b/drivers/usb/cdns3/cdns3-ti.c > > index 159814dfc856..65b8b6f4c654 100644 > > --- a/drivers/usb/cdns3/cdns3-ti.c > > +++ b/drivers/usb/cdns3/cdns3-ti.c > > @@ -258,7 +258,21 @@ static const struct of_dev_auxdata cdns_ti_auxdata[] = { > > {}, > > }; > > > > +static struct cdns3_platform_data cdns_ti_j7200_pdata = { > > + .quirks = CDNS3_RESET_ON_RESUME | > > But you mentioned that the behavior can be different based on which > idle state the system went into. > Setting this flag will means Reset is required on every resume. No, this flag's only behavior is to enable XHCI_RESET_ON_RESUME in the lower xHCI stack. Code is in __cdns_host_init(): if (cdns->pdata && (cdns->pdata->quirks & CDNS3_RESET_ON_RESUME)) cdns->xhci_plat_data->quirks |= XHCI_RESET_ON_RESUME; > Instead, you just need to rely on the runtime check and set the xhci->lost_power flag at resume. I argued about my view of the XHCI_RESET_ON_RESUME quirk under [PATCH v5 09/12]. https://lore.kernel.org/lkml/D42NIH63EHZG.KKWZR2WZB68L@bootlin.com/ Regards, -- Théo Lebrun, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
diff --git a/drivers/usb/cdns3/cdns3-ti.c b/drivers/usb/cdns3/cdns3-ti.c index 159814dfc856..65b8b6f4c654 100644 --- a/drivers/usb/cdns3/cdns3-ti.c +++ b/drivers/usb/cdns3/cdns3-ti.c @@ -258,7 +258,21 @@ static const struct of_dev_auxdata cdns_ti_auxdata[] = { {}, }; +static struct cdns3_platform_data cdns_ti_j7200_pdata = { + .quirks = CDNS3_RESET_ON_RESUME | + CDNS3_DRD_SUSPEND_RESIDENCY_ENABLE, /* Errata i2409 */ +}; + +static const struct of_dev_auxdata cdns_ti_j7200_auxdata[] = { + { + .compatible = "cdns,usb3", + .platform_data = &cdns_ti_j7200_pdata, + }, + {}, +}; + static const struct of_device_id cdns_ti_of_match[] = { + { .compatible = "ti,j7200-usb", .data = cdns_ti_j7200_auxdata }, { .compatible = "ti,j721e-usb", .data = cdns_ti_auxdata }, { .compatible = "ti,am64-usb", .data = cdns_ti_auxdata }, {},
Add ti,j7200-usb compatible. Match data indicates the controller resets on resume which tells that to the cdns3 core. This in turn silences a xHCI warning visible in cases of unexpected resets. We also inherit the errata quirk CDNS3_DRD_SUSPEND_RESIDENCY_ENABLE from the default `cdns_ti_auxdata` configuration. Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com> --- drivers/usb/cdns3/cdns3-ti.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)