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| author | Antti Koskipaa <antti.koskipaa@linux.intel.com> | 2015-07-10 14:10:55 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-08-14 18:13:09 +0200 |
| commit | 75067ddecf21271631bc018d2fb23ddd09b66aae (patch) | |
| tree | 025b3cfb003926340197383bc9858a47ecc5a8ca /drivers/gpu/drm/i915/intel_ddi.c | |
| parent | 622147fdad5425f6f572f84ce709303e5e0500b7 (diff) | |
| download | lwn-75067ddecf21271631bc018d2fb23ddd09b66aae.tar.gz lwn-75067ddecf21271631bc018d2fb23ddd09b66aae.zip | |
drm/i915: Per-DDI I_boost override
An OEM may request increased I_boost beyond the recommended values
by specifying an I_boost value to be applied to all swing entries for
a port. These override values are specified in VBT.
v2: rebase and remove unused iboost_bit variable
Issue: VIZ-5676
Signed-off-by: Antti Koskipaa <antti.koskipaa@linux.intel.com>
Reviewed-by: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ddi.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ddi.c | 38 |
1 files changed, 30 insertions, 8 deletions
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 110d5469c86c..6cfe65d6a8cf 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -440,6 +440,7 @@ static void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port, { struct drm_i915_private *dev_priv = dev->dev_private; u32 reg; + u32 iboost_bit = 0; int i, n_hdmi_entries, n_dp_entries, n_edp_entries, hdmi_default_entry, size; int hdmi_level = dev_priv->vbt.ddi_port_info[port].hdmi_level_shift; @@ -466,6 +467,10 @@ static void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port, ddi_translations_hdmi = skl_get_buf_trans_hdmi(dev, &n_hdmi_entries); hdmi_default_entry = 8; + /* If we're boosting the current, set bit 31 of trans1 */ + if (dev_priv->vbt.ddi_port_info[port].hdmi_boost_level || + dev_priv->vbt.ddi_port_info[port].dp_boost_level) + iboost_bit = 1<<31; } else if (IS_BROADWELL(dev)) { ddi_translations_fdi = bdw_ddi_translations_fdi; ddi_translations_dp = bdw_ddi_translations_dp; @@ -526,7 +531,7 @@ static void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port, } for (i = 0, reg = DDI_BUF_TRANS(port); i < size; i++) { - I915_WRITE(reg, ddi_translations[i].trans1); + I915_WRITE(reg, ddi_translations[i].trans1 | iboost_bit); reg += 4; I915_WRITE(reg, ddi_translations[i].trans2); reg += 4; @@ -541,7 +546,7 @@ static void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port, hdmi_level = hdmi_default_entry; /* Entry 9 is for HDMI: */ - I915_WRITE(reg, ddi_translations_hdmi[hdmi_level].trans1); + I915_WRITE(reg, ddi_translations_hdmi[hdmi_level].trans1 | iboost_bit); reg += 4; I915_WRITE(reg, ddi_translations_hdmi[hdmi_level].trans2); reg += 4; @@ -2078,18 +2083,35 @@ static void skl_ddi_set_iboost(struct drm_device *dev, u32 level, struct drm_i915_private *dev_priv = dev->dev_private; const struct ddi_buf_trans *ddi_translations; uint8_t iboost; + uint8_t dp_iboost, hdmi_iboost; int n_entries; u32 reg; + /* VBT may override standard boost values */ + dp_iboost = dev_priv->vbt.ddi_port_info[port].dp_boost_level; + hdmi_iboost = dev_priv->vbt.ddi_port_info[port].hdmi_boost_level; + if (type == INTEL_OUTPUT_DISPLAYPORT) { - ddi_translations = skl_get_buf_trans_dp(dev, &n_entries); - iboost = ddi_translations[port].i_boost; + if (dp_iboost) { + iboost = dp_iboost; + } else { + ddi_translations = skl_get_buf_trans_dp(dev, &n_entries); + iboost = ddi_translations[port].i_boost; + } } else if (type == INTEL_OUTPUT_EDP) { - ddi_translations = skl_get_buf_trans_edp(dev, &n_entries); - iboost = ddi_translations[port].i_boost; + if (dp_iboost) { + iboost = dp_iboost; + } else { + ddi_translations = skl_get_buf_trans_edp(dev, &n_entries); + iboost = ddi_translations[port].i_boost; + } } else if (type == INTEL_OUTPUT_HDMI) { - ddi_translations = skl_get_buf_trans_hdmi(dev, &n_entries); - iboost = ddi_translations[port].i_boost; + if (hdmi_iboost) { + iboost = hdmi_iboost; + } else { + ddi_translations = skl_get_buf_trans_hdmi(dev, &n_entries); + iboost = ddi_translations[port].i_boost; + } } else { return; } |