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drm: prioritize gpus with the most internal panels (#144)

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Ikalco 2025-02-09 06:22:25 -06:00 • committed by GitHub
parent 427077ca92
commit a3dda0d10c
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1 changed files with 36 additions and 0 deletions
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36
src/backend/drm/DRM.cpp
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@ -68,6 +68,28 @@ static udev_enumerate* enumDRMCards(udev* udev) {
return enumerate;
}
static int gpuNumBuiltinPanels(const SP<CSessionDevice> gpu) {
auto resources = drmModeGetResources(gpu->fd);
if (!resources)
return 0;
int num = 0;
for (int i = 0; i < resources->count_connectors; ++i) {
auto drmConn = drmModeGetConnector(gpu->fd, resources->connectors[i]);
if (!drmConn)
continue;
if (drmConn->connector_type == DRM_MODE_CONNECTOR_LVDS || drmConn->connector_type == DRM_MODE_CONNECTOR_eDP || drmConn->connector_type == DRM_MODE_CONNECTOR_DSI)
num++;
drmModeFreeConnector(drmConn);
}
drmModeFreeResources(resources);
return num;
}
static std::vector<SP<CSessionDevice>> scanGPUs(SP<CBackend> backend) {
auto enumerate = enumDRMCards(backend->session->udevHandle);
@ -85,6 +107,9 @@ static std::vector<SP<CSessionDevice>> scanGPUs(SP<CBackend> backend) {
udev_list_entry* entry = nullptr;
std::deque<SP<CSessionDevice>> devices;
int maxBuiltinPanels = 0;
SP<CSessionDevice> maxBuiltinPanelsGPU;
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(enumerate)) {
auto path = udev_list_entry_get_name(entry);
auto device = udev_device_new_from_syspath(backend->session->udevHandle, path);
@ -131,6 +156,13 @@ static std::vector<SP<CSessionDevice>> scanGPUs(SP<CBackend> backend) {
devices.push_front(sessionDevice);
else
devices.push_back(sessionDevice);
int numBuiltinPanels = gpuNumBuiltinPanels(sessionDevice);
backend->log(AQ_LOG_TRACE, std::format("drm: Device {} has {} builtin {}", sessionDevice->path, numBuiltinPanels, numBuiltinPanels == 1 ? "panel" : "panels"));
if (numBuiltinPanels > maxBuiltinPanels) {
maxBuiltinPanelsGPU = sessionDevice;
maxBuiltinPanels = numBuiltinPanels;
}
}
udev_enumerate_unref(enumerate);
@ -174,6 +206,10 @@ static std::vector<SP<CSessionDevice>> scanGPUs(SP<CBackend> backend) {
backend->log(AQ_LOG_ERROR, std::format("drm: Explicit device {} not found", d));
}
} else {
if (maxBuiltinPanelsGPU && devices.front() != maxBuiltinPanelsGPU) {
std::erase(devices, maxBuiltinPanelsGPU);
devices.push_front(maxBuiltinPanelsGPU);
}
for (auto const& d : devices) {
vecDevices.push_back(d);
}