diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ddi.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 5ee0e33e2c00..cd7a0d979a10 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -801,6 +801,11 @@ static int intel_ddi_hdmi_level(struct drm_i915_private *dev_priv, enum port por hdmi_level >= n_hdmi_entries) hdmi_level = hdmi_default_entry; + if (WARN_ON_ONCE(n_hdmi_entries == 0)) + return 0; + if (WARN_ON_ONCE(hdmi_level >= n_hdmi_entries)) + hdmi_level = n_hdmi_entries - 1; + return hdmi_level; } @@ -864,6 +869,11 @@ static void intel_prepare_hdmi_ddi_buffers(struct intel_encoder *encoder, ddi_translations_hdmi = intel_ddi_get_buf_trans_hdmi(dev_priv, &n_hdmi_entries); + if (WARN_ON_ONCE(!ddi_translations_hdmi)) + return; + if (WARN_ON_ONCE(hdmi_level >= n_hdmi_entries)) + hdmi_level = n_hdmi_entries - 1; + /* If we're boosting the current, set bit 31 of trans1 */ if (IS_GEN9_BC(dev_priv) && dev_priv->vbt.ddi_port_info[port].hdmi_boost_level) @@ -1847,6 +1857,11 @@ static void skl_ddi_set_iboost(struct intel_encoder *encoder, else ddi_translations = intel_ddi_get_buf_trans_dp(dev_priv, port, &n_entries); + if (WARN_ON_ONCE(!ddi_translations)) + return; + if (WARN_ON_ONCE(level >= n_entries)) + level = n_entries - 1; + iboost = ddi_translations[level].i_boost; } @@ -1877,6 +1892,11 @@ static void bxt_ddi_vswing_sequence(struct intel_encoder *encoder, else ddi_translations = bxt_get_buf_trans_dp(dev_priv, &n_entries); + if (WARN_ON_ONCE(!ddi_translations)) + return; + if (WARN_ON_ONCE(level >= n_entries)) + level = n_entries - 1; + bxt_ddi_phy_set_signal_level(dev_priv, port, ddi_translations[level].margin, ddi_translations[level].scale, @@ -1932,13 +1952,10 @@ static void cnl_ddi_vswing_program(struct intel_encoder *encoder, else ddi_translations = cnl_get_buf_trans_dp(dev_priv, &n_entries); - if (WARN_ON(ddi_translations == NULL)) + if (WARN_ON_ONCE(!ddi_translations)) return; - - if (level >= n_entries) { - DRM_DEBUG_KMS("DDI translation not found for level %d. Using %d instead.", level, n_entries - 1); + if (WARN_ON_ONCE(level >= n_entries)) level = n_entries - 1; - } /* Set PORT_TX_DW5 Scaling Mode Sel to 010b. */ val = I915_READ(CNL_PORT_TX_DW5_LN0(port)); |