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