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const std = @import("std");
const os = std.os.linux;
const drm = @import("../root.zig");
pub const Connector = struct {
pub const Status = @import("status.zig").Status;
pub const Mode = @import("mode.zig").Mode;
pub const Kind = @import("kind.zig").Kind;
const Self = @This();
card: drm.Card,
encoder_ids: []u32,
modes: []Mode,
prop_ids: []u32,
prop_value_ids: []u64,
encoder_id: u32,
id: u32,
kind: Kind,
type_id: u32,
connection: Status,
mm_width: u32,
mm_height: u32,
subpixel: u32,
pad: u32,
pub fn raw_without_ids(card: drm.Card, id: u32) !drm.request.Connector {
var result = std.mem.zeroInit(drm.request.Connector, .{ .id = id });
try card.request(.get_connector, &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: drm.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,
.id = raw.id,
.kind = raw.type,
.type_id = raw.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 card.request(.get_connector, &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);
}
pub fn compatible_crtc(self: *Self) ?usize {
for (self.encoder_ids) |encoder_id| {
var encoder = drm.Encoder.init(self.card, encoder_id) catch continue;
defer encoder.deinit();
for (0..32) |index| {
if ((encoder.possible_crtcs & (@as(u32, 1) << @intCast(index))) != 0) {
return index;
}
}
}
return null;
}
};
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