From 740281072f9e53e5ce62590a352f35d8cc02770a Mon Sep 17 00:00:00 2001
From: Nathan Reiner <nathan@nathanreiner.xyz>
Date: Sat, 1 Feb 2025 13:06:31 +0100
Subject: reorganize drm connector

---
 src/screen/drm/connector/root.zig | 95 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 src/screen/drm/connector/root.zig

(limited to 'src/screen/drm/connector/root.zig')

diff --git a/src/screen/drm/connector/root.zig b/src/screen/drm/connector/root.zig
new file mode 100644
index 0000000..8883d29
--- /dev/null
+++ b/src/screen/drm/connector/root.zig
@@ -0,0 +1,95 @@
+const std = @import("std");
+const os = std.os.linux;
+const Drm = @import("../request.zig").Drm;
+const Card = @import("../card.zig").Card;
+
+pub const Connection = @import("connection.zig").Connection;
+pub const Mode = @import("mode.zig").Mode;
+
+const RawConnector = extern struct {
+    encoder_ids: ?*u32,
+    modes: ?*Mode,
+    prop_ids: ?*u32,
+    prop_value_ids: ?*u64,
+    count_modes: u32,
+    count_props: u32,
+    count_encoders: u32,
+    encoder_id: u32,
+    connector_id: u32,
+    connector_type: u32,
+    connector_type_id: u32,
+    connection: Connection,
+    mm_width: u32,
+    mm_height: u32,
+    subpixel: u32,
+    pad: u32,
+};
+
+pub const Connector = struct {
+    const Self = @This();
+
+    card: *Card,
+
+    encoder_ids: []u32,
+    modes: []Mode,
+    prop_ids: []u32,
+    prop_value_ids: []u64,
+    encoder_id: u32,
+    connector_id: u32,
+    connector_type: u32,
+    connector_type_id: u32,
+    connection: Connection,
+    mm_width: u32,
+    mm_height: u32,
+    subpixel: u32,
+    pad: u32,
+
+    pub fn raw_without_ids(card: *Card, id: u32) !RawConnector {
+        var result = std.mem.zeroInit(RawConnector, .{ .connector_id = id });
+        try Drm.get_connector.request(card.file.handle, RawConnector, &result);
+        return result;
+    }
+
+    // NOTE: This function does not take in account
+    //       that there might be some hot-plugging going
+    //       on. This might have to change in the future.
+    pub fn init(card: *Card, id: u32) !Self {
+        var raw = try Self.raw_without_ids(card, id);
+        const resources = .{
+            .encoder_ids = try card.allocator.alloc(u32, raw.count_encoders),
+            .modes = try card.allocator.alloc(Mode, raw.count_modes),
+            .prop_ids = try card.allocator.alloc(u32, raw.count_props),
+            .prop_value_ids = try card.allocator.alloc(u64, raw.count_props),
+            .encoder_id = raw.encoder_id,
+            .connector_id = raw.connector_id,
+            .connector_type = raw.connector_type,
+            .connector_type_id = raw.connector_type_id,
+            .connection = raw.connection,
+            .mm_width = raw.mm_width,
+            .mm_height = raw.mm_height,
+            .subpixel = raw.subpixel,
+            .pad = raw.pad,
+            .card = card,
+        };
+
+        @memset(resources.encoder_ids, 0);
+        @memset(resources.modes, std.mem.zeroes(Mode));
+        @memset(resources.prop_ids, 0);
+        @memset(resources.prop_value_ids, 0);
+
+        raw.encoder_ids = @ptrCast(resources.encoder_ids);
+        raw.modes = @ptrCast(resources.modes);
+        raw.prop_ids = @ptrCast(resources.prop_ids);
+        raw.prop_value_ids = @ptrCast(resources.prop_value_ids);
+
+        try Drm.get_connector.request(card.file.handle, RawConnector, &raw);
+
+        return resources;
+    }
+
+    pub fn deinit(self: *Self) void {
+        self.card.allocator.free(self.encoder_ids);
+        self.card.allocator.free(self.modes);
+        self.card.allocator.free(self.prop_ids);
+    }
+};
-- 
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