| Message ID | 20240305161122.1254099-3-waynec@nvidia.com |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | Fix incorrect USB3 phy parsing in tegra-xudc | expand |
On Wed, Mar 06, 2024 at 12:11:22AM +0800, Wayne Chang wrote: > This commit resolves an issue in the tegra-xudc USB gadget driver that > incorrectly fetched USB3 PHY instances. The problem stemmed from the > assumption of a one-to-one correspondence between USB2 and USB3 PHY > names and their association with physical USB ports in the device tree. > > Previously, the driver associated USB3 PHY names directly with the USB3 > instance number, leading to mismatches when mapping the physical USB > ports. For instance, if using USB3-1 PHY, the driver expect the > corresponding PHY name as 'usb3-1'. However, the physical USB ports in > the device tree were designated as USB2-0 and USB3-0 as we only have > one device controller, causing a misalignment. > > This commit rectifies the issue by adjusting the PHY naming logic. > Now, the driver correctly correlates the USB2 and USB3 PHY instances, > allowing the USB2-0 and USB3-1 PHYs to form a physical USB port pair > while accurately reflecting their configuration in the device tree by > naming them USB2-0 and USB3-0, respectively. > > The change ensures that the PHY and PHY names align appropriately, > resolving the mismatch between physical USB ports and their associated > names in the device tree. > > Fixes: b4e19931c98a ("usb: gadget: tegra-xudc: Support multiple device modes") > Cc: stable@vger.kernel.org You mark patch 2/2 for stable, but not patch 1/2? That's not going to work well, is it? :( thanks, greg k-h
Hi Greg, Thanks for the review. On 3/6/24 06:10, Greg KH wrote: > External email: Use caution opening links or attachments > > > On Wed, Mar 06, 2024 at 12:11:22AM +0800, Wayne Chang wrote: >> This commit resolves an issue in the tegra-xudc USB gadget driver that >> incorrectly fetched USB3 PHY instances. The problem stemmed from the >> assumption of a one-to-one correspondence between USB2 and USB3 PHY >> names and their association with physical USB ports in the device tree. >> >> Previously, the driver associated USB3 PHY names directly with the USB3 >> instance number, leading to mismatches when mapping the physical USB >> ports. For instance, if using USB3-1 PHY, the driver expect the >> corresponding PHY name as 'usb3-1'. However, the physical USB ports in >> the device tree were designated as USB2-0 and USB3-0 as we only have >> one device controller, causing a misalignment. >> >> This commit rectifies the issue by adjusting the PHY naming logic. >> Now, the driver correctly correlates the USB2 and USB3 PHY instances, >> allowing the USB2-0 and USB3-1 PHYs to form a physical USB port pair >> while accurately reflecting their configuration in the device tree by >> naming them USB2-0 and USB3-0, respectively. >> >> The change ensures that the PHY and PHY names align appropriately, >> resolving the mismatch between physical USB ports and their associated >> names in the device tree. >> >> Fixes: b4e19931c98a ("usb: gadget: tegra-xudc: Support multiple device modes") >> Cc: stable@vger.kernel.org > You mark patch 2/2 for stable, but not patch 1/2? That's not going to > work well, is it? :( Yes, sorry about that. I'll update in the next patchset. > thanks, > > greg k-h > thanks, Wayne.
diff --git a/drivers/usb/gadget/udc/tegra-xudc.c b/drivers/usb/gadget/udc/tegra-xudc.c index cb85168fd00c..7aa46d426f31 100644 --- a/drivers/usb/gadget/udc/tegra-xudc.c +++ b/drivers/usb/gadget/udc/tegra-xudc.c @@ -3491,8 +3491,8 @@ static void tegra_xudc_device_params_init(struct tegra_xudc *xudc) static int tegra_xudc_phy_get(struct tegra_xudc *xudc) { - int err = 0, usb3; - unsigned int i; + int err = 0, usb3_companion_port; + unsigned int i, j; xudc->utmi_phy = devm_kcalloc(xudc->dev, xudc->soc->num_phys, sizeof(*xudc->utmi_phy), GFP_KERNEL); @@ -3520,7 +3520,7 @@ static int tegra_xudc_phy_get(struct tegra_xudc *xudc) if (IS_ERR(xudc->utmi_phy[i])) { err = PTR_ERR(xudc->utmi_phy[i]); dev_err_probe(xudc->dev, err, - "failed to get usb2-%d PHY\n", i); + "failed to get PHY for phy-name usb2-%d\n", i); goto clean_up; } else if (xudc->utmi_phy[i]) { /* Get usb-phy, if utmi phy is available */ @@ -3539,19 +3539,30 @@ static int tegra_xudc_phy_get(struct tegra_xudc *xudc) } /* Get USB3 phy */ - usb3 = tegra_xusb_padctl_get_usb3_companion(xudc->padctl, i); - if (usb3 < 0) + usb3_companion_port = tegra_xusb_padctl_get_usb3_companion(xudc->padctl, i); + if (usb3_companion_port < 0) continue; - snprintf(phy_name, sizeof(phy_name), "usb3-%d", usb3); - xudc->usb3_phy[i] = devm_phy_optional_get(xudc->dev, phy_name); - if (IS_ERR(xudc->usb3_phy[i])) { - err = PTR_ERR(xudc->usb3_phy[i]); - dev_err_probe(xudc->dev, err, - "failed to get usb3-%d PHY\n", usb3); - goto clean_up; - } else if (xudc->usb3_phy[i]) - dev_dbg(xudc->dev, "usb3-%d PHY registered", usb3); + for (j = 0; j < xudc->soc->num_phys; j++) { + snprintf(phy_name, sizeof(phy_name), "usb3-%d", j); + xudc->usb3_phy[i] = devm_phy_optional_get(xudc->dev, phy_name); + if (IS_ERR(xudc->usb3_phy[i])) { + err = PTR_ERR(xudc->usb3_phy[i]); + dev_err_probe(xudc->dev, err, + "failed to get PHY for phy-name usb3-%d\n", j); + goto clean_up; + } else if (xudc->usb3_phy[i]) { + int usb2_port = + tegra_xusb_padctl_get_port_number(xudc->utmi_phy[i]); + int usb3_port = + tegra_xusb_padctl_get_port_number(xudc->usb3_phy[i]); + if (usb3_port == usb3_companion_port) { + dev_dbg(xudc->dev, "USB2 port %d is paired with USB3 port %d for device mode port %d\n", + usb2_port, usb3_port, i); + break; + } + } + } } return err;
This commit resolves an issue in the tegra-xudc USB gadget driver that incorrectly fetched USB3 PHY instances. The problem stemmed from the assumption of a one-to-one correspondence between USB2 and USB3 PHY names and their association with physical USB ports in the device tree. Previously, the driver associated USB3 PHY names directly with the USB3 instance number, leading to mismatches when mapping the physical USB ports. For instance, if using USB3-1 PHY, the driver expect the corresponding PHY name as 'usb3-1'. However, the physical USB ports in the device tree were designated as USB2-0 and USB3-0 as we only have one device controller, causing a misalignment. This commit rectifies the issue by adjusting the PHY naming logic. Now, the driver correctly correlates the USB2 and USB3 PHY instances, allowing the USB2-0 and USB3-1 PHYs to form a physical USB port pair while accurately reflecting their configuration in the device tree by naming them USB2-0 and USB3-0, respectively. The change ensures that the PHY and PHY names align appropriately, resolving the mismatch between physical USB ports and their associated names in the device tree. Fixes: b4e19931c98a ("usb: gadget: tegra-xudc: Support multiple device modes") Cc: stable@vger.kernel.org Signed-off-by: Wayne Chang <waynec@nvidia.com> --- drivers/usb/gadget/udc/tegra-xudc.c | 39 ++++++++++++++++++----------- 1 file changed, 25 insertions(+), 14 deletions(-)