On Thu, Nov 20, 2025 at 12:31 PM Carlos Song [off-list ref] wrote:

EDMA resume is in early stage and suspend is in late stage, but LPI2C
resume and suspend are in NOIRQ stage. So LPI2C resource become ready
earlier than EDMA. When IRQ enabled, immediately slave will trigger LPI2C
to read data and the length meets the requirements for DMA usage, the DMA
will be needed at this time. Within a very small time window, EDMA is
still not resumed.

If a system-wide suspend or resume transition is in progress. LPI2C should
use PIO to transfer data not DMA to avoid issue caused by not ready DMA HW
resource.

Fixes: a09c8b3f9047 ("i2c: imx-lpi2c: add eDMA mode support for LPI2C")
Signed-off-by: Carlos Song <redacted>
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For future patches please add here a small description of what changed since v1:
e.g

Changes since v1:
* updated commit message as per discussion with Frank.