On Mon, Jul 08, 2019 at 04:05:13PM +0530, Manivannan Sadhasivam wrote: > On Mon, Jul 08, 2019 at 05:59:04PM +0800, Shawn Guo wrote: > > On Mon, Jul 08, 2019 at 02:42:54PM +0530, Manivannan Sadhasivam wrote: > > > Hi Shawn, > > > > > > Thanks for the patch! > > > > > > On Sun, Jul 07, 2019 at 08:59:55PM +0800, Shawn Guo wrote: > > > > The Meerkat96 board, based on the NXP i.MX7D SoC, is a member of > > > > 96Boards community and complies with all Consumer Edition board > > > > specifications. > > > > > > > > https://www.novtech.com/products/meerkat96.html > > > > https://www.96boards.org/product/imx7-96/ > > > > > > > > The initial supported/tested devices include: > > > > - Debug serial > > > > - SD > > > > - USB Host (with Ethernet) > > > > > > While testing, I encountered below error when starting usb: > > > > > > => usb start > > > starting USB... > > > Bus usb@30b10000: usb dr_mode not found > > > Error enabling VBUS supply > > > probe failed, error -38 > > > > This is expected, as there are some properties missing from DT for > > USBOTG1, and I haven't put effort on it yet. > > > > This is fine. > > > > Bus usb@30b20000: data abort > > > pc : [<9ffaf574>] lr : [<9ffaf560>] > > > reloc pc : [<87828574>] lr : [<87828560>] > > > sp : 9df7d1b0 ip : 431bde82 fp : 9ff9dc8c > > > r10: 00000000 r9 : 9df84ed8 r8 : 00000000 > > > r7 : 9df865d8 r6 : 9df86578 r5 : 9df87680 r4 : 00000080 > > > r3 : 00000000 r2 : 0196f7b6 r1 : 31310000 r0 : 00000000 > > > Flags: nZCv IRQs off FIQs off Mode SVC_32 > > > Code: 18bd8010 e2841dc2 e2811031 e1a01801 (e5913234) > > > Resetting CPU ... > > > > > > resetting ... > > > > It looks the exception comes from USBOTG2 which backs both Host ports on > > Meerkat96 board. I have never seen this in my testing. Do you have any > > USB device connected to the Host port, when this happens? > > > > Digged into this issue and found that the below commit is causing regression: > > 501547cec1 ("usb: ehci-mx6: Fix bus enumeration for DM case") > > But as mentioned in the commit message, that commit was incomplete and this > issue might be expected. Reverting the commit makes usb work again. And the > reason you are not seeing this issue is, your tree might not be updated > with mainline u-boot ;-)
Ah, that's the reason. I started my work on v2019.07-rc4 which doesn't include Marek's commit. Shawn _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
