i3c: mipi-i3c-hci: Add DMA ring abort quirk for Intel controllers

Browse source

DMA rings can be aborted either per-ring via RING_CONTROL or globally
via HC_CONTROL_ABORT. The driver currently relies on the per-ring
mechanism.

Some Intel I3C HCI controllers require HC_CONTROL_ABORT to be asserted
before a DMA ring abort is effective.  This behavior is non-standard.
Introduce a controller quirk to select the required abort method and
enable it for Intel LPSS I3C controllers.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260603090754.16252-12-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

...

This commit is contained in:

Adrian Hunter 2026-06-03 12:07:48 +03:00 • committed by Alexandre Belloni

parent 5d38555049

commit 352d89067f

3 changed files with 33 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

18

drivers/i3c/master/mipi-i3c-hci/core.c

View file

17

drivers/i3c/master/mipi-i3c-hci/dma.c

View file

2

drivers/i3c/master/mipi-i3c-hci/hci.h

View file