core: log gpu information in debuginfo

.clang-tidy

@@ -20,6 +20,7 @@ Checks: >
   -cppcoreguidelines-avoid-do-while,
   -cppcoreguidelines-pro-type-reinterpret-cast,
   -cppcoreguidelines-pro-type-vararg,
+  -cppcoreguidelines-pro-type-union-access,
   -cppcoreguidelines-use-enum-class,
   google-global-names-in-headers,
   google-readability-casting,

BUILD.md

@@ -33,6 +33,7 @@ Quickshell has a set of base dependencies you will always need, names vary by di
 - `cmake`
 - `qt6base`
 - `qt6declarative`
+- `libdrm`
 - `qtshadertools` (build-time)
 - `spirv-tools` (build-time)
 - `pkg-config` (build-time)
@@ -146,7 +147,6 @@ Enables streaming video from monitors and toplevel windows through various proto
 To disable: `-DSCREENCOPY=OFF`
 
 Dependencies:
-- `libdrm`
 - `libgbm`
 - `vulkan-headers` (build-time)
 

changelog/next.md

@@ -64,3 +64,4 @@ set shell id.
 - `vulkan-headers` has been added as a build-time dependency for screencopy (Vulkan backend support).
 - `breakpad` has been replaced by `cpptrace`, which is far easier to package, and the `CRASH_REPORTER` cmake variable has been replaced with `CRASH_HANDLER` to stop this from being easy to ignore.
 - `DISTRIBUTOR_DEBUGINFO_AVAILABLE` was removed as it is no longer important without breakpad.
+- `libdrm` is now unconditionally required as a direct dependency.

default.nix

@@ -76,6 +76,7 @@
     buildInputs = [
       qt6.qtbase
       qt6.qtdeclarative
+      libdrm
       cli11
     ]
     ++ lib.optional withQtSvg qt6.qtsvg
@@ -88,7 +89,7 @@
     ++ lib.optional withJemalloc jemalloc
     ++ lib.optional (withWayland && lib.strings.compareVersions qt6.qtbase.version "6.10.0" == -1) qt6.qtwayland
     ++ lib.optionals withWayland [ wayland wayland-protocols ]
-    ++ lib.optionals (withWayland && libgbm != null) [ libdrm libgbm vulkan-headers ]
+    ++ lib.optionals (withWayland && libgbm != null) [ libgbm vulkan-headers ]
     ++ lib.optional withX11 libxcb
     ++ lib.optional withPam pam
     ++ lib.optional withPipewire pipewire

src/core/CMakeLists.txt

@@ -1,3 +1,4 @@
+pkg_check_modules(libdrm REQUIRED IMPORTED_TARGET libdrm)
 qt_add_library(quickshell-core STATIC
 	plugin.cpp
 	shell.cpp
@@ -54,7 +55,7 @@ qt_add_qml_module(quickshell-core
 
 install_qml_module(quickshell-core)
 
-target_link_libraries(quickshell-core PRIVATE Qt::Quick Qt::QuickPrivate Qt::Widgets quickshell-build)
+target_link_libraries(quickshell-core PRIVATE Qt::Quick Qt::QuickPrivate Qt::Widgets quickshell-build PkgConfig::libdrm)
 
 qs_module_pch(quickshell-core SET large)
 

src/core/debuginfo.cpp

@@ -7,8 +7,10 @@
 #include <qfile.h>
 #include <qfloat16.h>
 #include <qhashfunctions.h>
+#include <qscopeguard.h>
 #include <qtversion.h>
 #include <unistd.h>
+#include <xf86drm.h>
 
 #include "build.hpp"
 
@@ -20,10 +22,82 @@ QString qsVersion() {
 
 QString qtVersion() { return qVersion() % QStringLiteral(" (built against " QT_VERSION_STR ")"); }
 
+QString gpuInfo() {
+	auto deviceCount = drmGetDevices2(0, nullptr, 0);
+	if (deviceCount < 0) return "Failed to get DRM device count: " % QString::number(deviceCount);
+	auto* devices = new drmDevicePtr[deviceCount];
+	auto devicesArrayGuard = qScopeGuard([&] { delete[] devices; });
+	auto r = drmGetDevices2(0, devices, deviceCount);
+	if (deviceCount < 0) return "Failed to get DRM devices: " % QString::number(r);
+	auto devicesGuard = qScopeGuard([&] {
+		for (auto i = 0; i != deviceCount; ++i) drmFreeDevice(&devices[i]); // NOLINT
+	});
+
+	QString info;
+	auto stream = QTextStream(&info);
+
+	for (auto i = 0; i != deviceCount; ++i) {
+		auto* device = devices[i]; // NOLINT
+
+		int deviceNodeType = -1;
+		if (device->available_nodes & (1 << DRM_NODE_RENDER)) deviceNodeType = DRM_NODE_RENDER;
+		else if (device->available_nodes & (1 << DRM_NODE_PRIMARY)) deviceNodeType = DRM_NODE_PRIMARY;
+
+		if (deviceNodeType == -1) continue;
+
+		auto* deviceNode = device->nodes[DRM_NODE_RENDER]; // NOLINT
+
+		auto driver = [&]() -> QString {
+			auto fd = open(deviceNode, O_RDWR | O_CLOEXEC);
+			if (fd == -1) return "<failed to open device node>";
+			auto fdGuard = qScopeGuard([&] { close(fd); });
+			auto* ver = drmGetVersion(fd);
+			if (!ver) return "<drmGetVersion failed>";
+			auto verGuard = qScopeGuard([&] { drmFreeVersion(ver); });
+
+			// clang-format off
+			return QString(ver->name)
+				% ' ' % QString::number(ver->version_major)
+				% '.' % QString::number(ver->version_minor)
+				% '.' % QString::number(ver->version_patchlevel)
+				% " (" % ver->desc % ')';
+			// clang-format on
+		}();
+
+		QString product = "unknown";
+		QString address = "unknown";
+
+		auto hex = [](int num, int pad) { return QString::number(num, 16).rightJustified(pad, '0'); };
+
+		switch (device->bustype) {
+		case DRM_BUS_PCI: {
+			auto* b = device->businfo.pci;
+			auto* d = device->deviceinfo.pci;
+			address = "PCI " % hex(b->bus, 2) % ':' % hex(b->dev, 2) % '.' % hex(b->func, 1);
+			product = hex(d->vendor_id, 4) % ':' % hex(d->device_id, 4);
+		} break;
+		case DRM_BUS_USB: {
+			auto* b = device->businfo.usb;
+			auto* d = device->deviceinfo.usb;
+			address = "USB " % QString::number(b->bus) % ':' % QString::number(b->dev);
+			product = hex(d->vendor, 4) % ':' % hex(d->product, 4);
+		} break;
+		default: break;
+		}
+
+		stream << "GPU " << deviceNode << "\n  Driver: " << driver << "\n  Model: " << product
+		       << "\n  Address: " << address << '\n';
+	}
+
+	return info;
+}
+
 QString systemInfo() {
 	QString info;
 	auto stream = QTextStream(&info);
 
+	stream << gpuInfo() << '\n';
+
 	stream << "/etc/os-release:";
 	auto osReleaseFile = QFile("/etc/os-release");
 	if (osReleaseFile.open(QFile::ReadOnly)) {

src/core/debuginfo.hpp

@@ -6,6 +6,7 @@ namespace qs::debuginfo {
 
 QString qsVersion();
 QString qtVersion();
+QString gpuInfo();
 QString systemInfo();
 QString combinedInfo();