diff mbox series

[net,v3] net: wwan: t7xx: add PM_AUTOSUSPEND_MS_BY_DW5933E for Dell DW5933e

Message ID 20241015032820.2265382-1-wojackbb@gmail.com (mailing list archive)
State New, archived
Headers show
Series [net,v3] net: wwan: t7xx: add PM_AUTOSUSPEND_MS_BY_DW5933E for Dell DW5933e | expand

Commit Message

吳逼逼 Oct. 15, 2024, 3:28 a.m. UTC 
From: Jack Wu <wojackbb@gmail.com>

Because optimizing the power consumption of Dell DW5933e,
Add a new auto suspend time for Dell DW5933e.

The Tests uses a small script to loop through the power_state
of Dell DW5933e.
(for example: /sys/bus/pci/devices/0000\:72\:00.0/power_state)

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

Signed-off-by: Jack Wu <wojackbb@gmail.com>
---
V3:
 * supplementary commit information
V2:
 * Fix code style error
---
---
 drivers/net/wwan/t7xx/t7xx_pci.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

Comments

Andrew Lunn Oct. 15, 2024, 3:56 p.m. UTC | #1 
On Tue, Oct 15, 2024 at 11:28:20AM +0800, wojackbb@gmail.com wrote:
> From: Jack Wu <wojackbb@gmail.com>
> 
> Because optimizing the power consumption of Dell DW5933e,
> Add a new auto suspend time for Dell DW5933e.
> 
> The Tests uses a small script to loop through the power_state
> of Dell DW5933e.
> (for example: /sys/bus/pci/devices/0000\:72\:00.0/power_state)
> 
> * If Auto suspend is 20 seconds,
>   test script show power_state have 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% of the time was in D3 state
>   when host don't have data packet transmission.

There are still open questions on V2:

https://patchwork.kernel.org/project/netdevbpf/patch/20240930031624.2116592-1-wojackbb@gmail.com/

    Andrew

---
pw-bot: cr
diff mbox series

Patch

diff --git a/drivers/net/wwan/t7xx/t7xx_pci.c b/drivers/net/wwan/t7xx/t7xx_pci.c
index e556e5bd49ab..ec567153ea6e 100644
--- a/drivers/net/wwan/t7xx/t7xx_pci.c
+++ b/drivers/net/wwan/t7xx/t7xx_pci.c
@@ -49,6 +49,7 @@ 
 #define PM_SLEEP_DIS_TIMEOUT_MS		20
 #define PM_ACK_TIMEOUT_MS		1500
 #define PM_AUTOSUSPEND_MS		20000
+#define PM_AUTOSUSPEND_MS_BY_DW5933E 5000
 #define PM_RESOURCE_POLL_TIMEOUT_US	10000
 #define PM_RESOURCE_POLL_STEP_US	100
 
@@ -174,7 +175,7 @@  static int t7xx_wait_pm_config(struct t7xx_pci_dev *t7xx_dev)
 	return ret;
 }
 
-static int t7xx_pci_pm_init(struct t7xx_pci_dev *t7xx_dev)
+static int t7xx_pci_pm_init(struct t7xx_pci_dev *t7xx_dev, int pm_autosuspend_ms)
 {
 	struct pci_dev *pdev = t7xx_dev->pdev;
 
@@ -191,7 +192,7 @@  static int t7xx_pci_pm_init(struct t7xx_pci_dev *t7xx_dev)
 				DPM_FLAG_NO_DIRECT_COMPLETE);
 
 	iowrite32(T7XX_L1_BIT(0), IREG_BASE(t7xx_dev) + DISABLE_ASPM_LOWPWR);
-	pm_runtime_set_autosuspend_delay(&pdev->dev, PM_AUTOSUSPEND_MS);
+	pm_runtime_set_autosuspend_delay(&pdev->dev, pm_autosuspend_ms);
 	pm_runtime_use_autosuspend(&pdev->dev);
 
 	return 0;
@@ -824,7 +825,13 @@  static int t7xx_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	IREG_BASE(t7xx_dev) = pcim_iomap_table(pdev)[T7XX_PCI_IREG_BASE];
 	t7xx_dev->base_addr.pcie_ext_reg_base = pcim_iomap_table(pdev)[T7XX_PCI_EREG_BASE];
 
-	ret = t7xx_pci_pm_init(t7xx_dev);
+	if (id->vendor == 0x14c0 && id->device == 0x4d75) {
+		/* Dell DW5933e */
+		ret = t7xx_pci_pm_init(t7xx_dev, PM_AUTOSUSPEND_MS_BY_DW5933E);
+	} else {
+		/* Other devices */
+		ret = t7xx_pci_pm_init(t7xx_dev, PM_AUTOSUSPEND_MS);
+	}
 	if (ret)
 		return ret;