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accel/ivpu: Read clock rate only if device is up

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Do not unnecessarily wake up device to read clock rate.
Return 0 as clk_rate if device is suspended.

Signed-off-by: Karol Wachowski <karol.wachowski@linux.intel.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231020104501.697763-4-stanislaw.gruszka@linux.intel.com
This commit is contained in:
Karol Wachowski 2023-10-20 12:44:58 +02:00 committed by Stanislaw Gruszka
parent 74ce0f3873
commit c39dc15191
3 changed files with 31 additions and 1 deletions
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18
drivers/accel/ivpu/ivpu_drv.c
View File

@ -131,6 +131,22 @@ static int ivpu_get_capabilities(struct ivpu_device *vdev, struct drm_ivpu_param
return 0;
}
static int ivpu_get_core_clock_rate(struct ivpu_device *vdev, u64 *clk_rate)
{
int ret;
ret = ivpu_rpm_get_if_active(vdev);
if (ret < 0)
return ret;
*clk_rate = ret ? ivpu_hw_reg_pll_freq_get(vdev) : 0;
if (ret)
ivpu_rpm_put(vdev);
return 0;
}
static int ivpu_get_param_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
struct ivpu_file_priv *file_priv = file->driver_priv;
@ -154,7 +170,7 @@ static int ivpu_get_param_ioctl(struct drm_device *dev, void *data, struct drm_f
args->value = vdev->platform;
break;
case DRM_IVPU_PARAM_CORE_CLOCK_RATE:
args->value = ivpu_hw_reg_pll_freq_get(vdev);
ret = ivpu_get_core_clock_rate(vdev, &args->value);
break;
case DRM_IVPU_PARAM_NUM_CONTEXTS:
args->value = ivpu_get_context_count(vdev);

13
drivers/accel/ivpu/ivpu_pm.c
View File

@ -246,6 +246,19 @@ int ivpu_rpm_get(struct ivpu_device *vdev)
return ret;
}
int ivpu_rpm_get_if_active(struct ivpu_device *vdev)
{
int ret;
ivpu_dbg(vdev, RPM, "rpm_get_if_active count %d\n",
atomic_read(&vdev->drm.dev->power.usage_count));
ret = pm_runtime_get_if_active(vdev->drm.dev, false);
drm_WARN_ON(&vdev->drm, ret < 0);
return ret;
}
void ivpu_rpm_put(struct ivpu_device *vdev)
{
pm_runtime_mark_last_busy(vdev->drm.dev);

1
drivers/accel/ivpu/ivpu_pm.h
View File

@ -33,6 +33,7 @@ void ivpu_pm_reset_prepare_cb(struct pci_dev *pdev);
void ivpu_pm_reset_done_cb(struct pci_dev *pdev);
int __must_check ivpu_rpm_get(struct ivpu_device *vdev);
int __must_check ivpu_rpm_get_if_active(struct ivpu_device *vdev);
void ivpu_rpm_put(struct ivpu_device *vdev);
void ivpu_pm_schedule_recovery(struct ivpu_device *vdev);