marfrit/besser
1
0
Fork 0
Code Issues 2 Pull Requests Actions Packages Projects Releases Wiki Activity

patches: refresh c6.1 + c6.2 (init UNKNOWN; always run wsm_set_operational_mode)

Browse Source
This commit is contained in:
Markus Fritsche
2026-04-28 15:51:58 +02:00
parent e6a942a5df
commit c9057cac2c
4 changed files with 116 additions and 82 deletions
Download Patch File Download Diff File Expand all files Collapse all files
patches/pm-wake-consume-state/0001-bes2600-short-circuit-wake-handshake-when-chip-is-co.patch
+55 -38
View File
@@ -1,4 +1,4 @@
From b6608f14fe81f38f53b5c3e7e6a739cdf20237f8 Mon Sep 17 00:00:00 2001
From 1e6ccf95bba799e8599ae37c936aab76b9fc9018 Mon Sep 17 00:00:00 2001
From: Markus Fritsche <fritsche.markus@gmail.com>
Date: Tue, 28 Apr 2026 15:23:34 +0200
Subject: [PATCH] bes2600: short-circuit wake handshake when chip is confirmed
@@ -75,9 +75,9 @@ field added in the prerequisite patch.
Signed-off-by: Markus Fritsche <fritsche.markus@gmail.com>
---
bes2600/bes2600_sdio.c | 15 +++++++++++++--
bes2600/bes_pwr.c | 34 +++++++++++++++++++++++++++++++++-
2 files changed, 46 insertions(+), 3 deletions(-)
bes2600/bes2600_sdio.c | 15 +++++++++--
bes2600/bes_pwr.c | 58 ++++++++++++++++++++++++++++++++++++------
2 files changed, 63 insertions(+), 10 deletions(-)
diff --git a/bes2600/bes2600_sdio.c b/bes2600/bes2600_sdio.c
index 3e04e8c..acc0f19 100644
@@ -113,10 +113,10 @@ index 3e04e8c..acc0f19 100644
return;
}
diff --git a/bes2600/bes_pwr.c b/bes2600/bes_pwr.c
index cd1b8cd..22074db 100644
index 820449c..2839ce7 100644
--- a/bes2600/bes_pwr.c
+++ b/bes2600/bes_pwr.c
@@ -597,19 +597,51 @@ static int bes2600_pwr_enter_lp_mode(struct bes2600_common *hw_priv)
@@ -597,19 +597,61 @@ static int bes2600_pwr_enter_lp_mode(struct bes2600_common *hw_priv)
static void bes2600_pwr_device_exit_lp_mode(struct bes2600_common *hw_priv)
{
int ret = 0;
@@ -126,45 +126,62 @@ index cd1b8cd..22074db 100644
.disableMoreFlagUsage = true,
};
- bes_devel("host lock lmac\n");
- if(hw_priv->sbus_ops->gpio_wake)
- hw_priv->sbus_ops->gpio_wake(hw_priv->sbus_priv, GPIO_WAKE_FLAG_MCU);
-
- if(hw_priv->sbus_ops->sbus_active) {
- ret = hw_priv->sbus_ops->sbus_active(hw_priv->sbus_priv, SUBSYSTEM_MCU);
- if (ret)
- bes_err("%s, active mcu fail\n", __func__);
+ /*
+ * Consult chip_pm_state set by bes2600_pwr_notify_ps_changed().
+ * If we last saw the firmware confirm ACTIVE, skip the wake-up
+ * handshake entirely - the GPIO is already asserted, the SDIO
+ * MCU subsystem is already running, and another sbus_active()
+ * round-trip just hits its 200x2ms timeout because the firmware
+ * has nothing to do. This is the deterministic source of the
+ * "active mcu fail" cycle in dmesg when an enter_lp_mode timeout
+ * left bookkeeping desynced.
+ * If we last saw the firmware confirm ACTIVE, skip ONLY the
+ * gpio_wake + sbus_active wake handshake - the GPIO is already
+ * asserted high and the SDIO MCU subsystem is already running,
+ * so another sbus_active() round-trip just hits its 200x2ms
+ * timeout because the firmware has nothing to do.
+ *
+ * wsm_set_operational_mode() below is NOT part of the wake
+ * handshake; it is the operational-mode setter the firmware
+ * tracks per call. Skipping it leaves the chip's SDIO state
+ * machine without a fresh operational-mode update, which on
+ * PineTab2 wedges the bus (-EBUSY on next sdio_rx_work read)
+ * within a few seconds of probe completion. So it must run
+ * unconditionally.
+ */
+ state = atomic_read(&hw_priv->bes_power.chip_pm_state);
+ if (state == BES2600_CHIP_PM_ACTIVE) {
+ bes_devel("device_exit_lp_mode: chip already ACTIVE, skipping wake handshake\n");
+ return;
+ }
+ } else {
+ bes_devel("host lock lmac\n");
+ if (hw_priv->sbus_ops->gpio_wake)
+ hw_priv->sbus_ops->gpio_wake(hw_priv->sbus_priv,
+ GPIO_WAKE_FLAG_MCU);
+
bes_devel("host lock lmac\n");
if(hw_priv->sbus_ops->gpio_wake)
hw_priv->sbus_ops->gpio_wake(hw_priv->sbus_priv, GPIO_WAKE_FLAG_MCU);
if(hw_priv->sbus_ops->sbus_active) {
ret = hw_priv->sbus_ops->sbus_active(hw_priv->sbus_priv, SUBSYSTEM_MCU);
- if (ret)
+ if (ret) {
+ /*
+ * The firmware did not raise MCU_WAKEUP_READY within
+ * the SDIO handshake window. Mark chip state UNKNOWN
+ * and bail out before issuing wsm_set_operational_mode
+ * over a wedged bus - that would just compound the
+ * failure. The next exit_lp_mode call will see UNKNOWN
+ * and try the wake again from scratch; if it stays
+ * UNKNOWN across multiple cycles, the LMAC active-
+ * monitor will eventually escalate to bus_reset
+ * (c5.2's mmc_hw_reset path).
+ */
bes_err("%s, active mcu fail\n", __func__);
+ atomic_set(&hw_priv->bes_power.chip_pm_state,
+ BES2600_CHIP_PM_UNKNOWN);
+ return;
+ if (hw_priv->sbus_ops->sbus_active) {
+ ret = hw_priv->sbus_ops->sbus_active(hw_priv->sbus_priv,
+ SUBSYSTEM_MCU);
+ if (ret) {
+ /*
+ * MCU_WAKEUP_READY did not arrive within
+ * the SDIO handshake window. Record state
+ * as UNKNOWN so the next exit_lp_mode call
+ * also runs the full wake sequence (no
+ * skip), but still send operational_mode
+ * below to match pre-c6 behaviour - the
+ * WSM may succeed even if the SDIO active
+ * confirm was lost, and if it fails too,
+ * we just emit a second devel-level error.
+ * Repeated UNKNOWN is the signal for the
+ * LMAC active-monitor to eventually
+ * escalate to bus_reset (c5.2's
+ * mmc_hw_reset path).
+ */
+ bes_err("%s, active mcu fail\n", __func__);
+ atomic_set(&hw_priv->bes_power.chip_pm_state,
+ BES2600_CHIP_PM_UNKNOWN);
+ }
+ }
}