tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0+ */
2
3#ifndef _VKMS_DRV_H_
4#define _VKMS_DRV_H_
5
6#include <linux/hrtimer.h>
7
8#include <drm/drm.h>
9#include <drm/drm_gem.h>
10#include <drm/drm_gem_atomic_helper.h>
11#include <drm/drm_encoder.h>
12#include <drm/drm_writeback.h>
13
14#define XRES_MIN 20
15#define YRES_MIN 20
16
17#define XRES_DEF 1024
18#define YRES_DEF 768
19
20#define XRES_MAX 8192
21#define YRES_MAX 8192
22
23struct vkms_writeback_job {
24 struct dma_buf_map map[DRM_FORMAT_MAX_PLANES];
25 struct dma_buf_map data[DRM_FORMAT_MAX_PLANES];
26};
27
28struct vkms_composer {
29 struct drm_framebuffer fb;
30 struct drm_rect src, dst;
31 struct dma_buf_map map[4];
32 unsigned int offset;
33 unsigned int pitch;
34 unsigned int cpp;
35};
36
37/**
38 * vkms_plane_state - Driver specific plane state
39 * @base: base plane state
40 * @composer: data required for composing computation
41 */
42struct vkms_plane_state {
43 struct drm_shadow_plane_state base;
44 struct vkms_composer *composer;
45};
46
47struct vkms_plane {
48 struct drm_plane base;
49};
50
51/**
52 * vkms_crtc_state - Driver specific CRTC state
53 * @base: base CRTC state
54 * @composer_work: work struct to compose and add CRC entries
55 * @n_frame_start: start frame number for computed CRC
56 * @n_frame_end: end frame number for computed CRC
57 */
58struct vkms_crtc_state {
59 struct drm_crtc_state base;
60 struct work_struct composer_work;
61
62 int num_active_planes;
63 /* stack of active planes for crc computation, should be in z order */
64 struct vkms_plane_state **active_planes;
65 struct vkms_writeback_job *active_writeback;
66
67 /* below four are protected by vkms_output.composer_lock */
68 bool crc_pending;
69 bool wb_pending;
70 u64 frame_start;
71 u64 frame_end;
72};
73
74struct vkms_output {
75 struct drm_crtc crtc;
76 struct drm_encoder encoder;
77 struct drm_connector connector;
78 struct drm_writeback_connector wb_connector;
79 struct hrtimer vblank_hrtimer;
80 ktime_t period_ns;
81 struct drm_pending_vblank_event *event;
82 /* ordered wq for composer_work */
83 struct workqueue_struct *composer_workq;
84 /* protects concurrent access to composer */
85 spinlock_t lock;
86
87 /* protected by @lock */
88 bool composer_enabled;
89 struct vkms_crtc_state *composer_state;
90
91 spinlock_t composer_lock;
92};
93
94struct vkms_device;
95
96struct vkms_config {
97 bool writeback;
98 bool cursor;
99 bool overlay;
100 /* only set when instantiated */
101 struct vkms_device *dev;
102};
103
104struct vkms_device {
105 struct drm_device drm;
106 struct platform_device *platform;
107 struct vkms_output output;
108 const struct vkms_config *config;
109};
110
111#define drm_crtc_to_vkms_output(target) \
112 container_of(target, struct vkms_output, crtc)
113
114#define drm_device_to_vkms_device(target) \
115 container_of(target, struct vkms_device, drm)
116
117#define to_vkms_crtc_state(target)\
118 container_of(target, struct vkms_crtc_state, base)
119
120#define to_vkms_plane_state(target)\
121 container_of(target, struct vkms_plane_state, base.base)
122
123/* CRTC */
124int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
125 struct drm_plane *primary, struct drm_plane *cursor);
126
127int vkms_output_init(struct vkms_device *vkmsdev, int index);
128
129struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
130 enum drm_plane_type type, int index);
131
132/* CRC Support */
133const char *const *vkms_get_crc_sources(struct drm_crtc *crtc,
134 size_t *count);
135int vkms_set_crc_source(struct drm_crtc *crtc, const char *src_name);
136int vkms_verify_crc_source(struct drm_crtc *crtc, const char *source_name,
137 size_t *values_cnt);
138
139/* Composer Support */
140void vkms_composer_worker(struct work_struct *work);
141void vkms_set_composer(struct vkms_output *out, bool enabled);
142
143/* Writeback */
144int vkms_enable_writeback_connector(struct vkms_device *vkmsdev);
145
146#endif /* _VKMS_DRV_H_ */