diff options
| author | Sonika Jindal <sonika.jindal@intel.com> | 2015-05-06 17:35:48 +0530 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-05-08 13:03:41 +0200 |
| commit | 9e45803465417acfaaefc331d59dd7e6cf06110b (patch) | |
| tree | f401b7a8d0fc16ba78a4e4c755a2ab5a0cc92860 /drivers/gpu/drm/i915/i915_params.c | |
| parent | 983b4b9def913991ef829ca635f1b3e7dd391c1b (diff) | |
drm/i915/skl: Add module parameter to select edp vswing table
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>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_params.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_params.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index bb64415a1c3e..8ac5a1b29ac0 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -53,6 +53,7 @@ struct i915_params i915 __read_mostly = { .mmio_debug = 0, .verbose_state_checks = 1, .nuclear_pageflip = 0, + .edp_vswing = 0, }; module_param_named(modeset, i915.modeset, int, 0400); @@ -184,3 +185,10 @@ MODULE_PARM_DESC(verbose_state_checks, module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600); MODULE_PARM_DESC(nuclear_pageflip, "Force atomic modeset functionality; only planes work for now (default: false)."); + +/* WA to get away with the default setting in VBT for early platforms.Will be removed */ +module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400); +MODULE_PARM_DESC(edp_vswing, + "Ignore/Override vswing pre-emph table selection from VBT " + "(0=use value from vbt [default], 1=low power swing(200mV)," + "2=default swing(400mV))"); |