summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
blob: 28e732f94bf2f4d4160b46c42f41d68bd8fa6b35 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2021 Microsoft
 */

#include <linux/hyperv.h>

#include <drm/drm_damage_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_edid.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_format_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>

#include "hyperv_drm.h"

static int hyperv_blit_to_vram_rect(struct drm_framebuffer *fb,
				    const struct iosys_map *vmap,
				    struct drm_rect *rect)
{
	struct hyperv_drm_device *hv = to_hv(fb->dev);
	struct iosys_map dst = IOSYS_MAP_INIT_VADDR_IOMEM(hv->vram);
	int idx;

	if (!drm_dev_enter(&hv->dev, &idx))
		return -ENODEV;

	iosys_map_incr(&dst, drm_fb_clip_offset(fb->pitches[0], fb->format, rect));
	drm_fb_memcpy(&dst, fb->pitches, vmap, fb, rect);

	drm_dev_exit(idx);

	return 0;
}

static int hyperv_blit_to_vram_fullscreen(struct drm_framebuffer *fb,
					  const struct iosys_map *map)
{
	struct drm_rect fullscreen = {
		.x1 = 0,
		.x2 = fb->width,
		.y1 = 0,
		.y2 = fb->height,
	};
	return hyperv_blit_to_vram_rect(fb, map, &fullscreen);
}

static int hyperv_connector_get_modes(struct drm_connector *connector)
{
	struct hyperv_drm_device *hv = to_hv(connector->dev);
	int count;

	count = drm_add_modes_noedid(connector,
				     connector->dev->mode_config.max_width,
				     connector->dev->mode_config.max_height);
	drm_set_preferred_mode(connector, hv->preferred_width,
			       hv->preferred_height);

	return count;
}

static const struct drm_connector_helper_funcs hyperv_connector_helper_funcs = {
	.get_modes = hyperv_connector_get_modes,
};

static const struct drm_connector_funcs hyperv_connector_funcs = {
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = drm_connector_cleanup,
	.reset = drm_atomic_helper_connector_reset,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};

static inline int hyperv_conn_init(struct hyperv_drm_device *hv)
{
	drm_connector_helper_add(&hv->connector, &hyperv_connector_helper_funcs);
	return drm_connector_init(&hv->dev, &hv->connector,
				  &hyperv_connector_funcs,
				  DRM_MODE_CONNECTOR_VIRTUAL);
}

static int hyperv_check_size(struct hyperv_drm_device *hv, int w, int h,
			     struct drm_framebuffer *fb)
{
	u32 pitch = w * (hv->screen_depth / 8);

	if (fb)
		pitch = fb->pitches[0];

	if (pitch * h > hv->fb_size)
		return -EINVAL;

	return 0;
}

static void hyperv_pipe_enable(struct drm_simple_display_pipe *pipe,
			       struct drm_crtc_state *crtc_state,
			       struct drm_plane_state *plane_state)
{
	struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);

	hyperv_hide_hw_ptr(hv->hdev);
	hyperv_update_situation(hv->hdev, 1,  hv->screen_depth,
				crtc_state->mode.hdisplay,
				crtc_state->mode.vdisplay,
				plane_state->fb->pitches[0]);
	hyperv_blit_to_vram_fullscreen(plane_state->fb, &shadow_plane_state->data[0]);
}

static int hyperv_pipe_check(struct drm_simple_display_pipe *pipe,
			     struct drm_plane_state *plane_state,
			     struct drm_crtc_state *crtc_state)
{
	struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
	struct drm_framebuffer *fb = plane_state->fb;

	if (fb->format->format != DRM_FORMAT_XRGB8888)
		return -EINVAL;

	if (fb->pitches[0] * fb->height > hv->fb_size) {
		drm_err(&hv->dev, "fb size requested by %s for %dX%d (pitch %d) greater than %ld\n",
			current->comm, fb->width, fb->height, fb->pitches[0], hv->fb_size);
		return -EINVAL;
	}

	return 0;
}

static void hyperv_pipe_update(struct drm_simple_display_pipe *pipe,
			       struct drm_plane_state *old_state)
{
	struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
	struct drm_plane_state *state = pipe->plane.state;
	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state);
	struct drm_rect rect;

	if (drm_atomic_helper_damage_merged(old_state, state, &rect)) {
		hyperv_blit_to_vram_rect(state->fb, &shadow_plane_state->data[0], &rect);
		hyperv_update_dirt(hv->hdev, &rect);
	}
}

static const struct drm_simple_display_pipe_funcs hyperv_pipe_funcs = {
	.enable	= hyperv_pipe_enable,
	.check = hyperv_pipe_check,
	.update	= hyperv_pipe_update,
	DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS,
};

static const uint32_t hyperv_formats[] = {
	DRM_FORMAT_XRGB8888,
};

static const uint64_t hyperv_modifiers[] = {
	DRM_FORMAT_MOD_LINEAR,
	DRM_FORMAT_MOD_INVALID
};

static inline int hyperv_pipe_init(struct hyperv_drm_device *hv)
{
	int ret;

	ret = drm_simple_display_pipe_init(&hv->dev,
					   &hv->pipe,
					   &hyperv_pipe_funcs,
					   hyperv_formats,
					   ARRAY_SIZE(hyperv_formats),
					   hyperv_modifiers,
					   &hv->connector);
	if (ret)
		return ret;

	drm_plane_enable_fb_damage_clips(&hv->pipe.plane);

	return 0;
}

static enum drm_mode_status
hyperv_mode_valid(struct drm_device *dev,
		  const struct drm_display_mode *mode)
{
	struct hyperv_drm_device *hv = to_hv(dev);

	if (hyperv_check_size(hv, mode->hdisplay, mode->vdisplay, NULL))
		return MODE_BAD;

	return MODE_OK;
}

static const struct drm_mode_config_funcs hyperv_mode_config_funcs = {
	.fb_create = drm_gem_fb_create_with_dirty,
	.mode_valid = hyperv_mode_valid,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
};

int hyperv_mode_config_init(struct hyperv_drm_device *hv)
{
	struct drm_device *dev = &hv->dev;
	int ret;

	ret = drmm_mode_config_init(dev);
	if (ret) {
		drm_err(dev, "Failed to initialized mode setting.\n");
		return ret;
	}

	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;
	dev->mode_config.max_width = hv->screen_width_max;
	dev->mode_config.max_height = hv->screen_height_max;

	dev->mode_config.preferred_depth = hv->screen_depth;
	dev->mode_config.prefer_shadow = 0;

	dev->mode_config.funcs = &hyperv_mode_config_funcs;

	ret = hyperv_conn_init(hv);
	if (ret) {
		drm_err(dev, "Failed to initialized connector.\n");
		return ret;
	}

	ret = hyperv_pipe_init(hv);
	if (ret) {
		drm_err(dev, "Failed to initialized pipe.\n");
		return ret;
	}

	drm_mode_config_reset(dev);

	return 0;
}