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backends/drm: if multi-gpu copy fails, disable deep color

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The format XRGB8888 is effectively universally supported. If everything
else fails, try to fall back to that
This commit is contained in:
Xaver Hugl 2022-01-14 09:19:47 +01:00
parent 0a3922e29d
commit 0ecfbb0d1c
2 changed files with 34 additions and 11 deletions
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42
src/backends/drm/egl_gbm_backend.cpp
View file

@ -334,8 +334,9 @@ QSharedPointer<DrmBuffer> EglGbmBackend::importFramebuffer(Output &output, const
}
// ImportMode::DumbBuffer
if (!output.current.importSwapchain || output.current.importSwapchain->size() != size) {
output.current.importSwapchain = QSharedPointer<DumbSwapchain>::create(m_gpu, size, renderingBackend()->drmFormat(output.output));
if (output.current.importSwapchain->isEmpty()) {
const uint32_t format = renderingBackend()->drmFormat(output.output);
output.current.importSwapchain = QSharedPointer<DumbSwapchain>::create(m_gpu, size, format);
if (output.current.importSwapchain->isEmpty() || output.current.importSwapchain->currentBuffer()->format() != format) {
output.current.importSwapchain = nullptr;
}
}
@ -346,7 +347,8 @@ QSharedPointer<DrmBuffer> EglGbmBackend::importFramebuffer(Output &output, const
}
}
qCWarning(KWIN_DRM) << "all imports failed on output" << output.output;
// TODO turn off output?
// try again with XRGB8888, the most universally supported basic format
output.forceXrgb8888 = true;
return nullptr;
}
@ -542,18 +544,21 @@ QRegion EglGbmBackend::beginFrame(AbstractOutput *drmOutput)
}
}
bool EglGbmBackend::doesRenderFit(DrmAbstractOutput *output, const Output::RenderData &render)
bool EglGbmBackend::doesRenderFit(const Output &output, const Output::RenderData &render)
{
if (!render.gbmSurface) {
return false;
}
QSize surfaceSize = output->bufferSize();
if (output.forceXrgb8888 && render.gbmSurface->format() != DRM_FORMAT_XRGB8888) {
return false;
}
QSize surfaceSize = output.output->bufferSize();
if (surfaceSize != render.gbmSurface->size()) {
return false;
}
bool needsTexture = output->needsSoftwareTransformation();
bool needsTexture = output.output->needsSoftwareTransformation();
if (needsTexture) {
return render.shadowBuffer && render.shadowBuffer->textureSize() == output->sourceSize();
return render.shadowBuffer && render.shadowBuffer->textureSize() == output.output->sourceSize();
} else {
return render.shadowBuffer == nullptr;
}
@ -562,8 +567,8 @@ bool EglGbmBackend::doesRenderFit(DrmAbstractOutput *output, const Output::Rende
QRegion EglGbmBackend::prepareRenderingForOutput(Output &output)
{
// check if the current surface still fits
if (!doesRenderFit(output.output, output.current)) {
if (doesRenderFit(output.output, output.old)) {
if (!doesRenderFit(output, output.current)) {
if (doesRenderFit(output, output.old)) {
cleanupRenderData(output.current);
output.current = output.old;
output.old = {};
@ -763,7 +768,15 @@ QSharedPointer<DrmBuffer> EglGbmBackend::renderTestFrame(DrmAbstractOutput *outp
{
beginFrame(output);
glClear(GL_COLOR_BUFFER_BIT);
return endFrameWithBuffer(output, output->geometry());
const auto buffer = endFrameWithBuffer(output, output->geometry());
if (!buffer && this != renderingBackend()) {
// if CPU import fails we might need to try again
beginFrame(output);
glClear(GL_COLOR_BUFFER_BIT);
return endFrameWithBuffer(output, output->geometry());
} else {
return buffer;
}
}
QSharedPointer<GLTexture> EglGbmBackend::textureForOutput(AbstractOutput *output) const
@ -812,6 +825,15 @@ DrmGpu *EglGbmBackend::gpu() const
std::optional<GbmFormat> EglGbmBackend::chooseFormat(Output &output) const
{
if (output.forceXrgb8888) {
return GbmFormat {
.drmFormat = DRM_FORMAT_XRGB8888,
.redSize = 8,
.greenSize = 8,
.blueSize = 8,
.alphaSize = 0,
};
}
// formats are already sorted by order of preference
std::optional<GbmFormat> fallback;
for (const auto &format : qAsConst(m_formats)) {

3
src/backends/drm/egl_gbm_backend.h
View file

@ -95,6 +95,7 @@ private:
};
struct Output {
DrmAbstractOutput *output = nullptr;
bool forceXrgb8888 = false;
struct RenderData {
QSharedPointer<ShadowBuffer> shadowBuffer;
QSharedPointer<GbmSurface> gbmSurface;
@ -115,7 +116,7 @@ private:
QPointer<KWaylandServer::SurfaceInterface> oldScanoutCandidate;
};
bool doesRenderFit(DrmAbstractOutput *output, const Output::RenderData &render);
bool doesRenderFit(const Output &output, const Output::RenderData &render);
bool resetOutput(Output &output);
bool addOutput(DrmAbstractOutput *output);
void removeOutput(DrmAbstractOutput *output);