On Tue, Nov 16, 2021 at 12:27 PM Tim Harvey [off-list ref] wrote:

On Tue, Nov 16, 2021 at 10:04 AM Adam Ford [off-list ref] wrote:

quoted

On Tue, Nov 16, 2021 at 11:57 AM Tim Harvey [off-list ref] wrote:

quoted

On Thu, Nov 4, 2021 at 9:18 AM Adam Ford [off-list ref] wrote:

quoted

The i.MX8M Nano is similar to the i.MX8M Mini in some ways, but very
different in others.  With the blk-ctrl driver for Mini in place,
this series expands the blk-ctrl driver to support the Nano which
opens the door for additional functions in the future.  As part of
this series, it also addresses some issues in the GPCv2 driver and
finally adds support for enabling USB and GPU.

V3:  Fixes an the yaml example
V2:  Fixes the clock count in the blk-ctrl

Adam Ford (9):
  soc: imx: gpcv2: keep i.MX8MN gpumix bus clock enabled
  soc: imx: gpcv2: Add dispmix and mipi domains to imx8mn
  dt-bindings: power: imx8mn: add defines for DISP blk-ctrl domains
  dt-bindings: soc: add binding for i.MX8MN DISP blk-ctrl
  soc: imx: imx8m-blk-ctrl: add i.MX8MN DISP blk-ctrl
  arm64: dts: imx8mn: add GPC node
  arm64: dts: imx8mn: put USB controller into power-domains
  arm64: dts: imx8mn: add DISP blk-ctrl
  arm64: dts: imx8mn: Enable GPU

 .../soc/imx/fsl,imx8mn-disp-blk-ctrl.yaml     |  97 +++++++++++++++++
 arch/arm64/boot/dts/freescale/imx8mn.dtsi     | 103 ++++++++++++++++++
 drivers/soc/imx/gpcv2.c                       |  26 +++++
 drivers/soc/imx/imx8m-blk-ctrl.c              |  75 ++++++++++++-
 include/dt-bindings/power/imx8mn-power.h      |   5 +
 5 files changed, 305 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/soc/imx/fsl,imx8mn-disp-blk-ctrl.yaml

Adam,

Thanks for the patches. I'm not sure how best to test this but on an
imx8mm-venice-gw7902 which has USB, but no display.

I find that if DRM_ETNAVIV is enabled I hang at 'etnaviv etnaviv:
bound 38000000.gpu (ops 0xffff800010964748)'.

Thanks for testing this.

Does your board send power to the GPU?  I recall someone somewhere
didn't power theirGPU, but I can't remember who and/or what board was
being discussed.

Yes, the imx8mm-venice-gw7902 does have the GPU powered (the
imx8mm-venice-gw7901 was the one that did not).

I cannot replicate your issue.  I applied the patch series to
5.16-rc1, and it's still working for me.

root@beacon-imx8mn-kit:~# dmesg |grep viv
[   11.323660] etnaviv etnaviv: bound 38000000.gpu (ops gpu_ops [etnaviv])
[   11.480543] etnaviv-gpu 38000000.gpu: model: GC7000, revision: 6203
[   11.747576] [drm] Initialized etnaviv 1.3.0 20151214 for etnaviv on minor 0

After booting, I connected a USB drive and it enumerated.

[  152.328228] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1
[  152.351885] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
[  152.363859] hub 1-0:1.0: USB hub found
[  152.371560] hub 1-0:1.0: 1 port detected
[  153.075902] usb 1-1: new high-speed USB device number 2 using ci_hdrc
[  153.244124] usb-storage 1-1:1.0: USB Mass Storage device detected
[  153.263651] scsi host0: usb-storage 1-1:1.0
[  154.277997] scsi 0:0:0:0: Direct-Access     SanDisk  Cruzer
  1.00 PQ: 0 ANSI: 6
[  154.292357] sd 0:0:0:0: [sda] 247529472 512-byte logical blocks:
(127 GB/118 GiB)
[  154.309246] sd 0:0:0:0: [sda] Write Protect is off
[  154.319237] sd 0:0:0:0: [sda] Write cache: disabled, read cache:
enabled, doesn't support DPO or FUA
[  154.359113]  sda: sda1
[  154.366975] sd 0:0:0:0: [sda] Attached SCSI removable disk

root@beacon-imx8mn-kit:~# lsusb
Bus 001 Device 002: ID 0781:5530 SanDisk Corp. Cruzer
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

I am not sure where to go from here.

Tim

quoted

I'll run some more tests on the latest 5.16-rc1 to see if I can
replicate your issue.

adam

quoted

If DRM_ETNAVIV is not enabled:
- boots fine
- usb works
- soft reboot works (does not hang)

At least we have some progress.  :-)

adam

quoted

Best regards,

Tim

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