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platforms/drm: disable explicit modifiers by default

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There are some unresolved issues where driving outputs can fail because
of bandwidth constraints. These don't appear to happen with implicit
modifiers, or at least they don't happen as often.
This commit is contained in:
Xaver Hugl 2021-09-17 13:52:34 +02:00
parent 4848964c60
commit ca869e2bc5
1 changed files with 1 additions and 1 deletions
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2
src/plugins/platforms/drm/drm_object_plane.cpp
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@ -73,7 +73,7 @@ bool DrmPlane::init()
checkSupport(5, Transformation::ReflectY);
// read formats from blob if available and if modifiers are supported, and from the plane object if not
if (auto formatProp = getProp(PropertyIndex::In_Formats); formatProp && gpu()->addFB2ModifiersSupported() && qEnvironmentVariableIntValue("KWIN_DRM_NO_MODIFIERS") == 0) {
if (auto formatProp = getProp(PropertyIndex::In_Formats); formatProp && gpu()->addFB2ModifiersSupported() && qEnvironmentVariableIntValue("KWIN_DRM_USE_MODIFIERS") == 1) {
auto blob = static_cast<drm_format_modifier_blob*>(formatProp->currentBlob()->data);
auto modifiers = reinterpret_cast<drm_format_modifier*>(reinterpret_cast<uint8_t*>(blob) + blob->modifiers_offset);
uint32_t *formatarr = reinterpret_cast<uint32_t*>(reinterpret_cast<uint8_t*>(blob) + blob->formats_offset);