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drm/i915/skl: Add module parameter to select edp vswing table

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This provides an option to override the value set by VBT
for selecting edp Vswing Pre-emph setting table.

v2: Adding comment about this being a temporary workaround and
making the parameter read-only (Jani)
v3: Changing mode to 0400 instead of 0 (Jani)

https://bugs.freedesktop.org/show_bug.cgi?id=89554
Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Sonika Jindal
2015-05-06 17:35:48 +05:30
committed by Daniel Vetter
parent 983b4b9def
commit 9e45803465
5 changed files with 20 additions and 5 deletions
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2
drivers/gpu/drm/i915/intel_ddi.c
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@@ -282,7 +282,7 @@ static void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port,
ddi_translations_fdi = NULL;
ddi_translations_dp = skl_ddi_translations_dp;
n_dp_entries = ARRAY_SIZE(skl_ddi_translations_dp);
if (dev_priv->vbt.edp_low_vswing) {
if (dev_priv->edp_low_vswing) {
ddi_translations_edp = skl_ddi_translations_edp;
n_edp_entries = ARRAY_SIZE(skl_ddi_translations_edp);
} else {