diff mbox series

[09/11] accel/ivpu/40xx: Capture D0i3 entry host and device timestamps

Message ID 20231025094323.989987-10-stanislaw.gruszka@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series accel/ivpu: Update to -next 2023-10-25 | expand

Commit Message

Stanislaw Gruszka Oct. 25, 2023, 9:43 a.m. UTC 
From: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>

The driver needs to capture the D0i3 entry timestamp to
calculate D0i3 residency time.

The D0i3 residency time and the VPU timestamp are passed
to the firmware at D0i3 exit (warm boot).

Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
---
 drivers/accel/ivpu/ivpu_hw_40xx.c | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/drivers/accel/ivpu/ivpu_hw_40xx.c b/drivers/accel/ivpu/ivpu_hw_40xx.c
index 5876cfd9dd40..d8df2addd18a 100644
--- a/drivers/accel/ivpu/ivpu_hw_40xx.c
+++ b/drivers/accel/ivpu/ivpu_hw_40xx.c
@@ -909,10 +909,18 @@  static bool ivpu_hw_40xx_is_idle(struct ivpu_device *vdev)
 	       REG_TEST_FLD(VPU_40XX_BUTTRESS_VPU_STATUS, IDLE, val);
 }
 
+static void ivpu_hw_40xx_save_d0i3_entry_timestamp(struct ivpu_device *vdev)
+{
+	vdev->hw->d0i3_entry_host_ts = ktime_get_boottime();
+	vdev->hw->d0i3_entry_vpu_ts = REGV_RD64(VPU_40XX_CPU_SS_TIM_PERF_EXT_FREE_CNT);
+}
+
 static int ivpu_hw_40xx_power_down(struct ivpu_device *vdev)
 {
 	int ret = 0;
 
+	ivpu_hw_40xx_save_d0i3_entry_timestamp(vdev);
+
 	if (!ivpu_hw_40xx_is_idle(vdev) && ivpu_hw_40xx_ip_reset(vdev))
 		ivpu_warn(vdev, "Failed to reset the VPU\n");