This patch uses jiffies to calculate the huc
load time.This information can be useful for testing
to know how much time huc takes to load.
v2: Remove debugfs entry. Remove local variable
huc_finish_load. (Daniel, Tvrtko)
v3: Use ktime_get() for more accurate timings.
Ensure the load is successful, before load times
is printed. (Tvrtko, Michal)
Cc: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
Cc: Sujaritha Sundaresan <sujaritha.sundare...@intel.com>
Cc: Oscar Mateo Lozano <oscar.ma...@intel.com>
Cc: Michal Wajdeczko <michal.wajdec...@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.sriva...@intel.com>
---
drivers/gpu/drm/i915/intel_huc.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_huc.c b/drivers/gpu/drm/i915/intel_huc.c
index 8b4b535..972ae63 100644
--- a/drivers/gpu/drm/i915/intel_huc.c
+++ b/drivers/gpu/drm/i915/intel_huc.c
@@ -90,6 +90,7 @@ static int huc_ucode_xfer(struct drm_i915_private *dev_priv)
unsigned long offset = 0;
u32 size;
int ret;
+ ktime_t start_load;
ret = i915_gem_object_set_to_gtt_domain(huc_fw->obj, false);
if (ret) {
@@ -121,11 +122,14 @@ static int huc_ucode_xfer(struct drm_i915_private
*dev_priv)
I915_WRITE(DMA_COPY_SIZE, size);
/* Start the DMA */
+ start_load = ktime_get();
I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(HUC_UKERNEL | START_DMA));
/* Wait for DMA to finish */
ret = wait_for((I915_READ(DMA_CTRL) & START_DMA) == 0, 100);
+ huc_fw->load_time = ktime_ms_delta(ktime_get(), start_load);
+
DRM_DEBUG_DRIVER("HuC DMA transfer wait over with ret %d\n", ret);
/* Disable the bits once DMA is over */
@@ -220,6 +224,9 @@ void intel_huc_init_hw(struct intel_huc *huc)
if (huc->fw.load_status != INTEL_UC_FIRMWARE_SUCCESS)
DRM_ERROR("Failed to complete HuC uCode load with ret %d\n",
err);
+ else
+ DRM_DEBUG_DRIVER("Time taken to load HuC %lld ms\n",
+ huc->fw.load_time);
return;
}
--
2.7.4
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