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platform/chrome: lightbar: Optimize command size

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Enabling tracing with:
echo 1 > /sys/kernel/debug/tracing/events/cros_ec/cros_ec_request_start/enable

To monitor the command and response size. The defaults are 194 and 128 respectively:
cros_ec_request_start: version: 0, offset: 0, command: EC_CMD_LIGHTBAR_CMD, outsize: 194, insize: 128

Reduce the sizes to the expected subcommands.

Signed-off-by: Gwendal Grignou <gwendal@google.com>
Link: https://lore.kernel.org/r/20260204035036.697955-1-gwendal@google.com
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
This commit is contained in:
Gwendal Grignou 2026-02-03 19:50:36 -08:00 committed by Tzung-Bi Shih
parent 6de23f81a5
commit 286386820d
1 changed files with 3 additions and 0 deletions
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3
drivers/platform/chrome/cros_ec_lightbar.c
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@ -461,6 +461,8 @@ static ssize_t sequence_store(struct device *dev, struct device_attribute *attr,
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_SEQ;
param->seq.num = num;
msg->outsize = offsetof(typeof(*param), seq) + sizeof(param->seq);
msg->insize = 0;
ret = lb_throttle();
if (ret)
goto exit;
@ -516,6 +518,7 @@ static ssize_t program_store(struct device *dev, struct device_attribute *attr,
if (ret)
goto exit;
param = (struct ec_params_lightbar *)msg->data;
msg->insize = 0;
if (lb_version < 3) {
dev_info(dev, "Copying %zu byte program to EC", count);