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fix(rmt): fix pm lock type to increase stability

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This commit is contained in:
Chen Jichang
2025-10-29 15:40:24 +08:00
parent 8bc293dd67
commit fbc441713a
1 changed files with 1 additions and 7 deletions
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8
components/esp_driver_rmt/src/rmt_common.c
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@@ -242,15 +242,9 @@ esp_err_t rmt_select_periph_clock(rmt_channel_handle_t chan, rmt_clock_source_t
// if the CPU frequency goes down, the transfer+encoding scheme could be unstable because CPU can't fill the data in time
// so, choose ESP_PM_CPU_FREQ_MAX lock for non-dma mode
// otherwise, chose lock type based on the clock source
// note, even if the clock source is APB, we still use CPU_FREQ_MAX lock to ensure the stability of the RMT operation.
esp_pm_lock_type_t pm_lock_type = chan->dma_chan ? ESP_PM_NO_LIGHT_SLEEP : ESP_PM_CPU_FREQ_MAX;
#if SOC_RMT_SUPPORT_APB
if (clk_src == RMT_CLK_SRC_APB) {
// APB clock frequency can be changed during DFS
pm_lock_type = ESP_PM_APB_FREQ_MAX;
}
#endif // SOC_RMT_SUPPORT_APB
sprintf(chan->pm_lock_name, "rmt_%d_%d", group->group_id, chan->channel_id); // e.g. rmt_0_0
ret = esp_pm_lock_create(pm_lock_type, 0, chan->pm_lock_name, &chan->pm_lock);
ESP_RETURN_ON_ERROR(ret, TAG, "create pm lock failed");