Re: [PATCH v3 00/13] drm: zynqmp_dp: IRQ cleanups and debugfs support

[Tomi Valkeinen]

Hi Sean,

On 22/04/2024 21:45, Sean Anderson wrote:
> This series cleans up the zyqnmp_dp IRQ and locking situation. Once
> that's done, it adds debugfs support. The intent is to enable compliance
> testing or to help debug signal-integrity issues.
>
> Last time I discussed converting the HPD work(s) to a threaded IRQ. I
> did not end up doing that for this series since the steps would be
>
> - Add locking
> - Move link retraining to a work function
> - Harden the IRQ
> - Merge the works into a threaded IRQ (omitted)
>
> Which with the exception of the final step is the same as leaving those
> works as-is. Conversion to a threaded IRQ can be done as a follow-up.

What is the base for this series? I'm having trouble applying it.

I managed to mostly apply it, but I see the board hang when I unload the 
modules. I didn't debug it as it might as well be caused by my conflict 
resolution.

 Tomi

> Changes in v3:
> - Store base pointers in zynqmp_disp directly
> - Don't delay work
> - Convert to a hard IRQ
> - Use AUX IRQs instead of polling
> - Take dp->lock in zynqmp_dp_hpd_work_func
>
> Changes in v2:
> - Fix kerneldoc
> - Rearrange zynqmp_dp for better padding
> - Split off the HPD IRQ work into another commit
> - Expand the commit message
> - Document hpd_irq_work
> - Document debugfs files
> - Add ignore_aux_errors and ignore_hpd debugfs files to replace earlier
>    implicit functionality
> - Attempt to fix unreproducable, spurious build warning
> - Drop "Optionally ignore DPCD errors" in favor of a debugfs file
>    directly affecting zynqmp_dp_aux_transfer.
>
> Sean Anderson (13):
>    drm: xlnx: Store base pointers in zynqmp_disp directly
>    drm: xlnx: Fix kerneldoc
>    drm: zynqmp_dp: Downgrade log level for aux retries message
>    drm: zynqmp_dp: Adjust training values per-lane
>    drm: zynqmp_dp: Rearrange zynqmp_dp for better padding
>    drm: zynqmp_dp: Don't delay work
>    drm: zynqmp_dp: Add locking
>    drm: zynqmp_dp: Don't retrain the link in our IRQ
>    drm: zynqmp_dp: Convert to a hard IRQ
>    drm: zynqmp_dp: Use AUX IRQs instead of polling
>    drm: zynqmp_dp: Split off several helper functions
>    drm: zynqmp_dp: Take dp->lock in zynqmp_dp_hpd_work_func
>    drm: zynqmp_dp: Add debugfs interface for compliance testing
>
>   Documentation/gpu/drivers.rst       |   1 +
>   Documentation/gpu/zynqmp.rst        | 149 +++++
>   MAINTAINERS                         |   1 +
>   drivers/gpu/drm/xlnx/zynqmp_disp.c  |  44 +-
>   drivers/gpu/drm/xlnx/zynqmp_dp.c    | 909 +++++++++++++++++++++++++---
>   drivers/gpu/drm/xlnx/zynqmp_dpsub.h |   1 +
>   drivers/gpu/drm/xlnx/zynqmp_kms.h   |   4 +-
>   7 files changed, 1000 insertions(+), 109 deletions(-)
>   create mode 100644 Documentation/gpu/zynqmp.rst