diff options
| author | Peter Marheine <pmarheine@chromium.org> | 2022-12-05 16:29:23 +1100 |
|---|---|---|
| committer | Chromeos LUCI <chromeos-scoped@luci-project-accounts.iam.gserviceaccount.com> | 2022-12-09 03:54:17 +0000 |
| commit | 53c21ecb2ba9869430d9f1cb38bd1d84a4ab7707 (patch) | |
| tree | 3dc089250da0ba6d4a96c92b522fd8dee72d92d1 /include/config.h | |
| parent | c4a6d69d4aff004cab93ec7413e3721580ed9c70 (diff) | |
| download | chrome-ec-53c21ecb2ba9869430d9f1cb38bd1d84a4ab7707.tar.gz | |
usb_prl: support logging to a ring buffer
This allows PRL state logging to be displayed asynchronously, with
minimal effect on performance during operation and making it more
tractable to debug timing-sensitive behavior. Events are logged
unconditionally if logging is enabled, and displayed with the `prllog`
console command.
Output looks like this:
5489349 C0 PRL_TX_DISCARD_MESSAGE PRL_TX Set 0x4 : PRL_FLAGS_WAIT_SINK_OK |
5489440 C0 PRL_TX_PHY_LAYER_RESET PRL_TX Set 0x4 : PRL_FLAGS_WAIT_SINK_OK |
5489532 C0 PRL_TX_WAIT_FOR_MESSAGE_REQUEST PRL_TX Set 0x4 : PRL_FLAGS_WAIT_SINK_OK |
Fields are the event timestamp (in microseconds), followed by the port and
state name with the state machine flags on the rest of the line.
BUG=b:229692652
TEST=prllog on nereid console prints correct-looking states
when CONFIG_PLATFORM_EC_USB_PD_PRL_EVENT_LOG=y
BRANCH=none
Change-Id: I5ba9f0ee65613e5889b606484a62fe60ebe0b2b8
Signed-off-by: Peter Marheine <pmarheine@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/4078586
Reviewed-by: Diana Z <dzigterman@chromium.org>
Code-Coverage: Zoss <zoss-cl-coverage@prod.google.com>
Reviewed-by: Andrew McRae <amcrae@google.com>
Diffstat (limited to 'include/config.h')
| -rw-r--r-- | include/config.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/config.h b/include/config.h index 9519e35e5c..f353ef0d73 100644 --- a/include/config.h +++ b/include/config.h @@ -4719,6 +4719,17 @@ /* Record main PD events in a circular buffer */ #undef CONFIG_USB_PD_LOGGING +/* + * Record PRL state transitions in a ring buffer, readable via the `prllog` + * console command. + */ +#undef CONFIG_USB_PD_PRL_EVENT_LOG +/* + * Number of events that can be stored in the PRL log (after this many, the + * oldest entries will be replaced with new ones). + */ +#define CONFIG_USB_PD_PRL_EVENT_LOG_CAPACITY 128 + /* The size in bytes of the FIFO used for event logging */ #define CONFIG_EVENT_LOG_SIZE 512 |