[net-next,v2,net-next,v2] net: wwan: t7xx: Change PM_AUTOSUSPEND_MS to 5000

Commit Message

[e-mail] March 11, 2025, 2:01 a.m. UTC

From: Jack Wu <[e-mail]>

Because optimizing the power consumption of t7XX,
change auto suspend time to 5000.

The Tests uses a script to loop through the power_state
of t7XX.
(for example: /sys/bus/pci/devices/0000\:72\:00.0/power_state)

* If Auto suspend is 20 seconds,
  test script show power_state have 0~5% of the time was in D3 state
  when host don't have data packet transmission.

* Changed auto suspend time to 5 seconds,
  test script show power_state have 50%~80% of the time was in D3 state
  when host don't have data packet transmission.

We tested Fibocom FM350 and our products using the t7xx and they all
benefited from this.

Signed-off-by: Jack Wu <[e-mail]>
---
V2:
 * supplementary commit information
---
---
 drivers/net/wwan/t7xx/t7xx_pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--
2.34.1



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Patch

diff --git a/drivers/net/wwan/t7xx/t7xx_pci.c b/drivers/net/wwan/t7xx/t7xx_pci.c
index e556e5bd49ab..dcadd615a025 100644
--- a/drivers/net/wwan/t7xx/t7xx_pci.c
+++ b/drivers/net/wwan/t7xx/t7xx_pci.c
@@ -48,7 +48,7 @@ 
 #define T7XX_INIT_TIMEOUT              20
 #define PM_SLEEP_DIS_TIMEOUT_MS                20
 #define PM_ACK_TIMEOUT_MS              1500
-#define PM_AUTOSUSPEND_MS              20000
+#define PM_AUTOSUSPEND_MS              5000
 #define PM_RESOURCE_POLL_TIMEOUT_US    10000
 #define PM_RESOURCE_POLL_STEP_US       100