jpmschweitzerandClaude Fable 5
cb5826e02b
Root cause (verified against our exact IDF tree, not the community guess): the "258" in "sdio_write_task: Failed to send data: 258" is NOT a timeout (that is 263). 258 = 0x102 = ESP_ERR_INVALID_ARG. On the ESP32-P4, block- mode CMD53 writes require the SOURCE buffer to be 64-byte (cache-line) aligned; the IDF sdmmc driver rejects a misaligned source with INVALID_ARG BEFORE any bus activity. esp_hosts write loop then declares "Unrecoverable host sdio state" and reboots the whole P4. The audio TX payload is not 64-aligned, so streaming mic audio wedged on the very FIRST frame (which is exactly what we saw: listening -> instant Failed to send -> reboot). This also explains why buffer/queue/clock/retry tuning all did nothing: the write never reached the bus. And why our symptom was instant, not after ~100 writes (the community block-mode-desync theory) — it is the first misaligned buffer, every time. Fix: vendored esp_hosted 2.12.11 as an editable local component (overrides the registry copy) and bounce a misaligned TX payload through one aligned DMA scratch buffer in hosted_sdio_write_block (port_esp_hosted_host_sdio.c). TX is serialized by the bus lock so a single static bounce buffer is safe; freed in hosted_sdio_deinit. Host-only change — no C6 reflash. VERIFIED ON HARDWARE (autonomous self-test): 40s of continuous mic-audio upstream streaming — the traffic that previously wedged on the first frame — ran clean, zero timeouts, zero reboots. A guarded SDIO_TX_SELFTEST harness is kept (compiled out) for future SDIO stress testing. Credit: root cause + patch designed via multi-agent investigation; the precise 258=INVALID_ARG decode (correcting the upstream community timeout assumption) came from checking our actual esp_err.h. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/*
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* SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef __ESP_HOSTED_HEADER__H
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#define __ESP_HOSTED_HEADER__H
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/* Add packet number to debug any drops or out-of-seq packets */
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//#define ESP_PKT_NUM_DEBUG 1
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struct esp_payload_header {
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uint8_t if_type:4;
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uint8_t if_num:4;
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uint8_t flags;
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uint16_t len;
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uint16_t offset;
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uint16_t checksum;
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uint16_t seq_num;
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uint8_t throttle_cmd:2;
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uint8_t reserved2:6;
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#ifdef ESP_PKT_NUM_DEBUG
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uint16_t pkt_num;
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#endif
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/* Position of union field has to always be last,
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* this is required for hci_pkt_type */
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union {
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uint8_t reserved3;
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uint8_t hci_pkt_type; /* Packet type for HCI interface */
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uint8_t priv_pkt_type; /* Packet type for priv interface */
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};
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/* Do no add anything here */
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} __attribute__((packed));
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/* ESP Payload Header Flags */
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#define MORE_FRAGMENT (1 << 0)
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#define FLAG_WAKEUP_PKT (1 << 1)
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#define FLAG_POWER_SAVE_STARTED (1 << 2)
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#define FLAG_POWER_SAVE_STOPPED (1 << 3)
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#define H_ESP_PAYLOAD_HEADER_OFFSET sizeof(struct esp_payload_header)
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#endif
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