kms: Add kms backend module

Cargo.lock

@@ -300,6 +300,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "bitflags",
+ "edid-rs",
  "egui",
  "slog",
  "slog-async",
@@ -371,6 +372,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "dbus"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de0a745c25b32caa56b82a3950f5fec7893a960f4c10ca3b02060b0c38d8c2ce"
+dependencies = [
+ "libc",
+ "libdbus-sys",
+ "winapi",
+]
+
 [[package]]
 name = "dirs-next"
 version = "2.0.0"
@@ -450,6 +462,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "edid-rs"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ab5fa33485cd85ac354df485819a63360fefa312fe04cffe65e6f175be1522c"
+
 [[package]]
 name = "egui"
 version = "0.16.1"
@@ -601,6 +619,27 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "input"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f95640ef27dac9b23ef1fbd760c67a88ce3cab2143a2c18390e71f39c53b815f"
+dependencies = [
+ "bitflags",
+ "input-sys",
+ "libc",
+ "udev",
+]
+
+[[package]]
+name = "input-sys"
+version = "1.16.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e09d849da95ebb5d091c600f6cdae5193077995f1e9095c16a5bb4f84b561933"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "instant"
 version = "0.1.12"
@@ -646,6 +685,15 @@ version = "0.2.115"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0a8d982fa7a96a000f6ec4cfe966de9703eccde29750df2bb8949da91b0e818d"
 
+[[package]]
+name = "libdbus-sys"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c185b5b7ad900923ef3a8ff594083d4d9b5aea80bb4f32b8342363138c0d456b"
+dependencies = [
+ "pkg-config",
+]
+
 [[package]]
 name = "libloading"
 version = "0.7.3"
@@ -656,6 +704,16 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "libudev-sys"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c8469b4a23b962c1396b9b451dda50ef5b283e8dd309d69033475fa9b334324"
+dependencies = [
+ "libc",
+ "pkg-config",
+]
+
 [[package]]
 name = "lock_api"
 version = "0.4.5"
@@ -1149,12 +1207,12 @@ checksum = "f2dd574626839106c320a323308629dcb1acfc96e32a8cba364ddc61ac23ee83"
 [[package]]
 name = "smithay"
 version = "0.3.0"
-source = "git+https://github.com/Smithay/smithay.git?rev=ab89bda5#ab89bda5035ce03df42cc98d6b2ee6cd5d79862e"
 dependencies = [
  "appendlist",
  "bitflags",
  "calloop",
  "cgmath",
+ "dbus",
  "downcast-rs",
  "drm",
  "drm-ffi",
@@ -1162,17 +1220,20 @@ dependencies = [
  "gbm",
  "gl_generator",
  "indexmap",
+ "input",
  "lazy_static",
  "libc",
  "libloading",
  "nix",
  "once_cell",
+ "pkg-config",
  "rand",
  "scan_fmt",
  "slog",
  "slog-stdlog",
  "tempfile",
  "thiserror",
+ "udev",
  "wayland-commons",
  "wayland-egl",
  "wayland-protocols",
@@ -1318,6 +1379,17 @@ version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4ccbe8381883510b6a2d8f1e32905bddd178c11caef8083086d0c0c9ab0ac281"
 
+[[package]]
+name = "udev"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3193363f52bb34c6708ac2ffedcb5f7e5874f0329ef68e1315f27d8d768eb568"
+dependencies = [
+ "libc",
+ "libudev-sys",
+ "pkg-config",
+]
+
 [[package]]
 name = "unicode-xid"
 version = "0.2.2"

Cargo.toml

@@ -14,13 +14,14 @@ slog-async = "2.7"
 slog-scope = "4.4"
 slog-stdlog = "4.1"
 egui = { version = "0.16", optional = true }
+edid-rs = { version = "0.1" }
 
 [dependencies.smithay]
 version = "0.3"
 git = "https://github.com/Smithay/smithay.git"
 rev = "ab89bda5"
 default-features = false
-features = ["backend_x11", "backend_egl", "backend_winit", "desktop", "use_system_lib", "renderer_gl", "wayland_frontend", "slog-stdlog"]
+features = ["backend_drm", "backend_gbm", "backend_egl", "backend_libinput", "backend_session_logind", "backend_udev", "backend_winit", "backend_x11", "desktop", "use_system_lib", "renderer_gl", "wayland_frontend", "slog-stdlog"]
 
 [dependencies.smithay-egui]
 git = "https://github.com/Smithay/smithay-egui.git"
@@ -29,4 +30,7 @@ optional = true
 
 [features]
 default = []
-debug = ["egui", "smithay-egui"]
+debug = ["egui", "smithay-egui"]
+
+[patch."https://github.com/Smithay/smithay"]
+smithay = { path = "../../tavern/smithay" }

src/backend/kms/mod.rs

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+use crate::state::State;
+use anyhow::Result;
+use smithay::reexports::calloop::EventLoop;
+
+pub struct KmsState {}
+
+pub fn init_backend(event_loop: &mut EventLoop<State>, state: &mut State) -> Result<()> {
+    unimplemented!()
+}

src/backend/mod.rs

@@ -4,16 +4,17 @@ use crate::state::State;
 use anyhow::Result;
 use smithay::reexports::calloop::EventLoop;
 
+pub mod kms;
 pub mod winit;
 pub mod x11;
 // TODO
 // pub mod wayland; // tbd in smithay
-// pub mod udev;
 
 pub fn init_backend_auto(event_loop: &mut EventLoop<State>, state: &mut State) -> Result<()> {
     match std::env::var("COSMIC_BACKEND") {
         Ok(x) if x == "x11" => x11::init_backend(event_loop, state),
         Ok(x) if x == "winit" => winit::init_backend(event_loop, state),
+        Ok(x) if x == "kms" => kms::init_backend(event_loop, state),
         Ok(_) => unimplemented!("There is no backend with this identifier"),
         Err(_) => {
             if std::env::var_os("DISPLAY").is_some()
@@ -28,7 +29,7 @@ pub fn init_backend_auto(event_loop: &mut EventLoop<State>, state: &mut State) -
                     }
                 }
             } else {
-                unimplemented!("Currently this runs only nested")
+                kms::init_backend(event_loop, state)
             }
         }
     }

src/state.rs

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
 use crate::{
-    backend::{winit::WinitState, x11::X11State},
+    backend::{kms::KmsState, winit::WinitState, x11::X11State},
     shell::{init_shell, workspaces::Workspaces, ShellStates},
 };
 use smithay::{
@@ -60,13 +60,20 @@ pub struct Fps {
 pub enum BackendData {
     X11(X11State),
     Winit(WinitState),
+    Kms(KmsState),
     // TODO
     // Wayland(WaylandState),
-    // Udev(UdevState),
     Unset,
 }
 
 impl BackendData {
+    pub fn kms(&mut self) -> &mut KmsState {
+        match self {
+            BackendData::Kms(ref mut kms_state) => kms_state,
+            _ => unreachable!("Called kms in non kms backend"),
+        }
+    }
+
     pub fn x11(&mut self) -> &mut X11State {
         match self {
             BackendData::X11(ref mut x11_state) => x11_state,