The wopcm registers are write-once, so any write after the first one
will just be ignored. The registers survive a GPU reset but not
always a suspend/resume cycle, so to keep things simple keep the
writes in the intel_uc_init_hw function instead of moving it earlier
to make sure we attempt them every time we try to load GuC.
Cc: Jeff McGee <jeff.mc...@intel.com>
Cc: Anusha Srivatsa <anusha.sriva...@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospu...@intel.com>
---
drivers/gpu/drm/i915/intel_guc_loader.c | 4 ----
drivers/gpu/drm/i915/intel_huc.c | 5 -----
drivers/gpu/drm/i915/intel_uc.c | 5 +++++
3 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c
b/drivers/gpu/drm/i915/intel_guc_loader.c
index 2793c01..7678873 100644
--- a/drivers/gpu/drm/i915/intel_guc_loader.c
+++ b/drivers/gpu/drm/i915/intel_guc_loader.c
@@ -280,10 +280,6 @@ static int guc_ucode_xfer(struct drm_i915_private
*dev_priv)
intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
- /* init WOPCM */
- I915_WRITE(GUC_WOPCM_SIZE, intel_guc_wopcm_size(dev_priv));
- I915_WRITE(DMA_GUC_WOPCM_OFFSET, GUC_WOPCM_OFFSET_VALUE);
-
/* Enable MIA caching. GuC clock gating is disabled. */
I915_WRITE(GUC_SHIM_CONTROL, GUC_SHIM_CONTROL_VALUE);
diff --git a/drivers/gpu/drm/i915/intel_huc.c b/drivers/gpu/drm/i915/intel_huc.c
index 385cacb..8cf34bc 100644
--- a/drivers/gpu/drm/i915/intel_huc.c
+++ b/drivers/gpu/drm/i915/intel_huc.c
@@ -99,11 +99,6 @@ static int huc_ucode_xfer(struct drm_i915_private *dev_priv)
intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
- /* init WOPCM */
- I915_WRITE(GUC_WOPCM_SIZE, intel_guc_wopcm_size(dev_priv));
- I915_WRITE(DMA_GUC_WOPCM_OFFSET, GUC_WOPCM_OFFSET_VALUE |
- HUC_LOADING_AGENT_GUC);
-
/* Set the source address for the uCode */
offset = guc_ggtt_offset(vma) + huc_fw->header_offset;
I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset));
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index c117424..c14793e 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -274,6 +274,11 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
goto err_guc;
}
+ /* init WOPCM */
+ I915_WRITE(GUC_WOPCM_SIZE, intel_guc_wopcm_size(dev_priv));
+ I915_WRITE(DMA_GUC_WOPCM_OFFSET,
+ GUC_WOPCM_OFFSET_VALUE | HUC_LOADING_AGENT_GUC);
+
/* WaEnableuKernelHeaderValidFix:skl */
/* WaEnableGuCBootHashCheckNotSet:skl,bxt,kbl */
if (IS_GEN9(dev_priv))
--
1.9.1
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