From c39dc15191c4d40c58ce986e5f0daf94c84b7324 Mon Sep 17 00:00:00 2001 From: Karol Wachowski Date: Fri, 20 Oct 2023 12:44:58 +0200 Subject: [PATCH] accel/ivpu: Read clock rate only if device is up Do not unnecessarily wake up device to read clock rate. Return 0 as clk_rate if device is suspended. Signed-off-by: Karol Wachowski Reviewed-by: Stanislaw Gruszka Reviewed-by: Jeffrey Hugo Signed-off-by: Stanislaw Gruszka Link: https://patchwork.freedesktop.org/patch/msgid/20231020104501.697763-4-stanislaw.gruszka@linux.intel.com --- drivers/accel/ivpu/ivpu_drv.c | 18 +++++++++++++++++- drivers/accel/ivpu/ivpu_pm.c | 13 +++++++++++++ drivers/accel/ivpu/ivpu_pm.h | 1 + 3 files changed, 31 insertions(+), 1 deletion(-) diff --git a/drivers/accel/ivpu/ivpu_drv.c b/drivers/accel/ivpu/ivpu_drv.c index 7851ff7773ca..b6aa8893ff1c 100644 --- a/drivers/accel/ivpu/ivpu_drv.c +++ b/drivers/accel/ivpu/ivpu_drv.c @@ -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); diff --git a/drivers/accel/ivpu/ivpu_pm.c b/drivers/accel/ivpu/ivpu_pm.c index e359ba36a9c3..d14b6fd796b4 100644 --- a/drivers/accel/ivpu/ivpu_pm.c +++ b/drivers/accel/ivpu/ivpu_pm.c @@ -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); diff --git a/drivers/accel/ivpu/ivpu_pm.h b/drivers/accel/ivpu/ivpu_pm.h index f41c30a14a40..044db150be07 100644 --- a/drivers/accel/ivpu/ivpu_pm.h +++ b/drivers/accel/ivpu/ivpu_pm.h @@ -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); -- 2.20.1