[PATCH v2 0/3] i3c: mipi-i3c-hci: Add support for AMD_PT and improve IBI/PIO robustness

[Jian-Ming Liao]

This patch series introduces support for the AMD_PT I3C controller and
includes several improvements to the MIPI I3C HCI driver to enhance
stability and compliance with the latest specifications.

Summary of changes:
- Patch 1: Enables IBI threshold interrupts by default in PIO mode to
  better handle early IBIs.
- Patch 2: Adds explicit PIO queue management (enablement, starting, and
  stop/restart logic) for compliance with HCI v1.2.
- Patch 3: Adds the device ID and platform support for the AMD_PT I3C
  controller.

Changes in v2:
- Patch 1: Removed unverified "Hot-Join" wording from comments and
  commit message.
- Patch 2: Addressed maintainer feedback:
  - Removed '-' prefixes from commit message.
  - Reverted unnecessary debug line movements and cleaned up 
    macro alignments.
  - Removed redundant manual kfree(pio) to prevent double-free issues.
  - Adopted a helper macro for HCI version checks instead of hardcoding.

Testing:
These changes have been validated on the Intel Panther Lake (PTL) and
AMD_PT platforms. No regressions were observed for existing controllers.

Jian-Ming Liao (3):
  i3c: mipi-i3c-hci: Enable IBI threshold interrupt by default in PIO
    mode
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller

 drivers/i3c/master/mipi-i3c-hci/core.c        |  4 +
 drivers/i3c/master/mipi-i3c-hci/hci.h         |  5 ++
 .../master/mipi-i3c-hci/mipi-i3c-hci-pci.c    |  9 +++
 drivers/i3c/master/mipi-i3c-hci/pio.c         | 76 +++++++++++++++++--
 4 files changed, 88 insertions(+), 6 deletions(-)

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2.43.0