1 | // SPDX-License-Identifier: GPL-2.0 OR MIT |
2 | |
3 | /* |
4 | * Xen para-virtual DRM device |
5 | * |
6 | * Copyright (C) 2016-2018 EPAM Systems Inc. |
7 | * |
8 | * Author: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> |
9 | */ |
10 | |
11 | #include <drm/drm_atomic_helper.h> |
12 | #include <drm/drm_drv.h> |
13 | #include <drm/drm_fourcc.h> |
14 | #include <drm/drm_probe_helper.h> |
15 | |
16 | #include <video/videomode.h> |
17 | |
18 | #include "xen_drm_front.h" |
19 | #include "xen_drm_front_conn.h" |
20 | #include "xen_drm_front_kms.h" |
21 | |
22 | static struct xen_drm_front_drm_pipeline * |
23 | to_xen_drm_pipeline(struct drm_connector *connector) |
24 | { |
25 | return container_of(connector, struct xen_drm_front_drm_pipeline, conn); |
26 | } |
27 | |
28 | static const u32 plane_formats[] = { |
29 | DRM_FORMAT_RGB565, |
30 | DRM_FORMAT_RGB888, |
31 | DRM_FORMAT_XRGB8888, |
32 | DRM_FORMAT_ARGB8888, |
33 | DRM_FORMAT_XRGB4444, |
34 | DRM_FORMAT_ARGB4444, |
35 | DRM_FORMAT_XRGB1555, |
36 | DRM_FORMAT_ARGB1555, |
37 | DRM_FORMAT_YUYV, |
38 | }; |
39 | |
40 | const u32 *xen_drm_front_conn_get_formats(int *format_count) |
41 | { |
42 | *format_count = ARRAY_SIZE(plane_formats); |
43 | return plane_formats; |
44 | } |
45 | |
46 | static int connector_detect(struct drm_connector *connector, |
47 | struct drm_modeset_acquire_ctx *ctx, |
48 | bool force) |
49 | { |
50 | struct xen_drm_front_drm_pipeline *pipeline = |
51 | to_xen_drm_pipeline(connector); |
52 | |
53 | if (drm_dev_is_unplugged(dev: connector->dev)) |
54 | pipeline->conn_connected = false; |
55 | |
56 | return pipeline->conn_connected ? connector_status_connected : |
57 | connector_status_disconnected; |
58 | } |
59 | |
60 | #define XEN_DRM_CRTC_VREFRESH_HZ 60 |
61 | |
62 | static int connector_get_modes(struct drm_connector *connector) |
63 | { |
64 | struct xen_drm_front_drm_pipeline *pipeline = |
65 | to_xen_drm_pipeline(connector); |
66 | struct drm_display_mode *mode; |
67 | struct videomode videomode; |
68 | int width, height; |
69 | |
70 | mode = drm_mode_create(dev: connector->dev); |
71 | if (!mode) |
72 | return 0; |
73 | |
74 | memset(&videomode, 0, sizeof(videomode)); |
75 | videomode.hactive = pipeline->width; |
76 | videomode.vactive = pipeline->height; |
77 | width = videomode.hactive + videomode.hfront_porch + |
78 | videomode.hback_porch + videomode.hsync_len; |
79 | height = videomode.vactive + videomode.vfront_porch + |
80 | videomode.vback_porch + videomode.vsync_len; |
81 | videomode.pixelclock = width * height * XEN_DRM_CRTC_VREFRESH_HZ; |
82 | mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER; |
83 | |
84 | drm_display_mode_from_videomode(vm: &videomode, dmode: mode); |
85 | drm_mode_probed_add(connector, mode); |
86 | return 1; |
87 | } |
88 | |
89 | static const struct drm_connector_helper_funcs connector_helper_funcs = { |
90 | .get_modes = connector_get_modes, |
91 | .detect_ctx = connector_detect, |
92 | }; |
93 | |
94 | static const struct drm_connector_funcs connector_funcs = { |
95 | .fill_modes = drm_helper_probe_single_connector_modes, |
96 | .destroy = drm_connector_cleanup, |
97 | .reset = drm_atomic_helper_connector_reset, |
98 | .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, |
99 | .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, |
100 | }; |
101 | |
102 | int xen_drm_front_conn_init(struct xen_drm_front_drm_info *drm_info, |
103 | struct drm_connector *connector) |
104 | { |
105 | struct xen_drm_front_drm_pipeline *pipeline = |
106 | to_xen_drm_pipeline(connector); |
107 | |
108 | drm_connector_helper_add(connector, funcs: &connector_helper_funcs); |
109 | |
110 | pipeline->conn_connected = true; |
111 | |
112 | connector->polled = DRM_CONNECTOR_POLL_CONNECT | |
113 | DRM_CONNECTOR_POLL_DISCONNECT; |
114 | |
115 | return drm_connector_init(dev: drm_info->drm_dev, connector, |
116 | funcs: &connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL); |
117 | } |
118 | |