From: Ville Syrjälä <ville.syrj...@linux.intel.com>
The other DDI .enable_clock() functions are trying to protect us
against pll==NULL. A bit tempted to throw out all the WARNs as
just unnecessary noise, but I guess they might have some use
when poking around the shared_dpll code (not sure it wouldn't
oops elsewhere though). So let's unify it all and sprinkle in
the missing WARNs for icl/dg1.
Reviewed-by: Lucas De Marchi <lucas.demar...@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c
b/drivers/gpu/drm/i915/display/intel_ddi.c
index bd1eac282033..c98bdf456958 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -1604,6 +1604,9 @@ static void dg1_ddi_enable_clock(struct intel_encoder
*encoder,
struct intel_shared_dpll *pll = crtc_state->shared_dpll;
enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
+ if (drm_WARN_ON(&dev_priv->drm, !pll))
+ return;
+
/*
* If we fail this, something went very wrong: first 2 PLLs should be
* used by first 2 phys and last 2 PLLs by last phys
@@ -1661,6 +1664,9 @@ static void icl_ddi_combo_enable_clock(struct
intel_encoder *encoder,
sel = ICL_DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, phy);
}
+ if (drm_WARN_ON(&dev_priv->drm, !pll))
+ return;
+
mutex_lock(&dev_priv->dpll.lock);
/*
--
2.26.2
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