Hi, Peter Griffin <[email protected]> writes: > Hi Felipe, > > On Fri, 25 Mar 2016, Felipe Balbi wrote: > >> >> Hi, >> >> Gregory CLEMENT <[email protected]> writes: >> >> Peter Griffin <[email protected]> writes: >> >>> Otherwise generic-xhci and xhci-platform which have no data get wrongly >> >>> detected as XHCI_PLAT_TYPE_MARVELL_ARMADA by xhci_plat_type_is(). >> >>> >> >>> This fixes a regression in v4.5 for STiH407 family SoC's which use the >> >>> synopsis dwc3 IP, whereby the disable_clk error path gets taken due to >> >>> wrongly being detected as XHCI_PLAT_TYPE_MARVELL_ARMADA and the hcd never >> >>> gets added. >> >>> >> >>> I suspect this will also fix other dwc3 DT platforms such as Exynos, >> >>> although I've only tested on STih410 SoC. >> >>> >> >>> Fixes: 4efb2f694114 ("usb: host: xhci-plat: add struct xhci_plat_priv") >> >>> Cc: [email protected] >> >>> Cc: [email protected] >> >>> Cc: [email protected] >> >>> Signed-off-by: Peter Griffin <[email protected]> >> >>> --- >> >>> drivers/usb/host/xhci-plat.h | 2 +- >> >>> 1 file changed, 1 insertion(+), 1 deletion(-) >> >>> >> >>> diff --git a/drivers/usb/host/xhci-plat.h b/drivers/usb/host/xhci-plat.h >> >>> index 5a2e2e3..529c3c4 100644 >> >>> --- a/drivers/usb/host/xhci-plat.h >> >>> +++ b/drivers/usb/host/xhci-plat.h >> >>> @@ -14,7 +14,7 @@ >> >>> #include "xhci.h" /* for hcd_to_xhci() */ >> >>> >> >>> enum xhci_plat_type { >> >>> - XHCI_PLAT_TYPE_MARVELL_ARMADA, >> >>> + XHCI_PLAT_TYPE_MARVELL_ARMADA = 1, >> >>> XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2, >> >>> XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3, >> >> >> >> aren't these platforms using device tree ? Why aren't these just >> >> different compatible strings ? >> > >> > According to 4efb2f69411456d35051e9047c15157c9a5ba217 "usb: host: >> > xhci-plat: add struct xhci_plat_priv" : >> > >> > This patch adds struct xhci_plat_priv to simplify the code to match >> > platform specific variables. For now, this patch adds a member "type" in >> > the structure >> >> that's fine but the answer doesn't exactly match my question ;-) >> >> My point is that this enum shouldn't be necessary at all. We have >> compatible flags to make these checks instead. How about below ? >> (untested, uncompiled, yada yada yada). Note that we DON'T need this >> xhci_plat_type trickery, just need to be a little bit smarter about how >> we use driver_data: > > Your solution certainly looks more elegant.
cool thanks. Now that I think about this more carefully, we might wanna
take $subject anyway for the -rc and get my version applied for v4.7
merge window. What do you think ?
>> diff --git a/drivers/usb/host/xhci-mvebu.c b/drivers/usb/host/xhci-mvebu.c
>> index 1eefc988192d..1ea6c18b74f3 100644
>> --- a/drivers/usb/host/xhci-mvebu.c
>> +++ b/drivers/usb/host/xhci-mvebu.c
>> @@ -41,8 +41,9 @@ static void xhci_mvebu_mbus_config(void __iomem *base,
>> }
>> }
>>
>> -int xhci_mvebu_mbus_init_quirk(struct platform_device *pdev)
>> +int xhci_mvebu_mbus_init_quirk(struct usb_hcd *hcd)
>> {
>> + struct platform_device *pdev = to_platform_device(hcd->self.controller);
>> struct resource *res;
>> void __iomem *base;
>> const struct mbus_dram_target_info *dram;
>> diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
>> index 5c15e9bc5f7a..adb77c60a9ae 100644
>> --- a/drivers/usb/host/xhci-plat.c
>> +++ b/drivers/usb/host/xhci-plat.c
>> @@ -47,43 +47,56 @@ static void xhci_plat_quirks(struct device *dev, struct
>> xhci_hcd *xhci)
>> xhci->quirks |= XHCI_PLAT;
>> }
>>
>> +static void xhci_priv_plat_start(struct usb_hcd *hcd)
>> +{
>> + struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
>> +
>> + if (priv->plat_start)
>> + priv->plat_start(hcd);
>> +}
>> +
>> +static int xhci_priv_init_quirk(struct usb_hcd *hcd)
>> +{
>> + struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
>> +
>> + if (!priv->init_quirk)
>> + return 0;
>> +
>> + return priv->init_quirk(hcd);
>> +}
>> +
>> /* called during probe() after chip reset completes */
>> static int xhci_plat_setup(struct usb_hcd *hcd)
>> {
>> int ret;
>>
>> - if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) ||
>> - xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3)) {
>> - ret = xhci_rcar_init_quirk(hcd);
>> - if (ret)
>> - return ret;
>> - }
>> + ret = xhci_priv_init_quirk(hcd);
>> + if (ret)
>> + return ret;
>>
>> return xhci_gen_setup(hcd, xhci_plat_quirks);
>> }
>>
>> static int xhci_plat_start(struct usb_hcd *hcd)
>> {
>> - if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) ||
>> - xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3))
>> - xhci_rcar_start(hcd);
>> -
>> + xhci_priv_plat_start(hcd);
>> return xhci_run(hcd);
>> }
>>
>> #ifdef CONFIG_OF
>> static const struct xhci_plat_priv xhci_plat_marvell_armada = {
>> - .type = XHCI_PLAT_TYPE_MARVELL_ARMADA,
>> + .init_quirk = xhci_mvebu_mbus_init_quirk,
>> };
>>
>> static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
>> - .type = XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2,
>> .firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
>> + .init_quirk = xhci_rcar_init_quirk,
>> };
>>
>> static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
>> - .type = XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3,
>> .firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
>> + .init_quirk = xhci_rcar_init_quirk,
>> + .plat_start = xhci_rcar_start,
>> };
>>
>> static const struct of_device_id usb_xhci_of_match[] = {
>> diff --git a/drivers/usb/host/xhci-plat.h b/drivers/usb/host/xhci-plat.h
>> index 5a2e2e3936c4..c4d565980832 100644
>> --- a/drivers/usb/host/xhci-plat.h
>> +++ b/drivers/usb/host/xhci-plat.h
>> @@ -13,27 +13,13 @@
>>
>> #include "xhci.h" /* for hcd_to_xhci() */
>>
>> -enum xhci_plat_type {
>> - XHCI_PLAT_TYPE_MARVELL_ARMADA,
>> - XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2,
>> - XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3,
>> -};
>> -
>> struct xhci_plat_priv {
>> enum xhci_plat_type type;
>> const char *firmware_name;
>> + void (*plat_start)(struct usb_hcd *);
>> + int (*init_quirk)(struct usb_hcd *);
>> };
>>
>> #define hcd_to_xhci_priv(h) ((struct xhci_plat_priv *)hcd_to_xhci(h)->priv)
>>
>> -static inline bool xhci_plat_type_is(struct usb_hcd *hcd,
>> - enum xhci_plat_type type)
>> -{
>> - struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
>> -
>> - if (priv && priv->type == type)
>> - return true;
>> - else
>> - return false;
>> -}
>> #endif /* _XHCI_PLAT_H */
>>
>> ps: there might be bugs there, but it's a holiday and I really shouldn't
>> be spending time on this right now ;-)
>
> I'm also off on holiday now until Sunday 10th April... yay :-)
heh, cool :-)
>> Anyway, have fun testing. Let me know if it doesn't work.
>
> I only have access to STi platforms which were broken by this change.
> Not any of the platforms which rely on the functionality which
> was introduced (although I can't see any reason why your patch wouldn't work).
>
> Maybe Yoshihiro (on CC) could test this on the Renesas platforms and
> confirm?
sure, that would be great; then we avoid further regressions ;-)
--
balbi
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