From: Ville Syrjälä Date: Fri, 5 Feb 2021 21:46:29 +0000 (+0200) Subject: drm/i915: Sprinkle WARN(!pll) into icl/dg1 .clock_enable() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=f67a008e02e5751296300f9e7aa1028afc4a4964;p=linux.git drm/i915: Sprinkle WARN(!pll) into icl/dg1 .clock_enable() 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 Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20210205214634.19341-11-ville.syrjala@linux.intel.com --- diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index a14baea12800b..9c321b10abbf2 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -1606,6 +1606,9 @@ 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 @@ -1663,6 +1666,9 @@ 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); /*