Linux 6.10-rc3
[sfrench/cifs-2.6.git] / drivers / gpu / drm / vkms / vkms_drv.h
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_framebuffer.h>
10 #include <drm/drm_gem.h>
11 #include <drm/drm_gem_atomic_helper.h>
12 #include <drm/drm_encoder.h>
13 #include <drm/drm_writeback.h>
14
15 #define XRES_MIN    10
16 #define YRES_MIN    10
17
18 #define XRES_DEF  1024
19 #define YRES_DEF   768
20
21 #define XRES_MAX  8192
22 #define YRES_MAX  8192
23
24 #define NUM_OVERLAY_PLANES 8
25
26 #define VKMS_LUT_SIZE 256
27
28 struct vkms_frame_info {
29         struct drm_framebuffer *fb;
30         struct drm_rect src, dst;
31         struct drm_rect rotated;
32         struct iosys_map map[DRM_FORMAT_MAX_PLANES];
33         unsigned int rotation;
34         unsigned int offset;
35         unsigned int pitch;
36         unsigned int cpp;
37 };
38
39 struct pixel_argb_u16 {
40         u16 a, r, g, b;
41 };
42
43 struct line_buffer {
44         size_t n_pixels;
45         struct pixel_argb_u16 *pixels;
46 };
47
48 struct vkms_writeback_job {
49         struct iosys_map data[DRM_FORMAT_MAX_PLANES];
50         struct vkms_frame_info wb_frame_info;
51         void (*pixel_write)(u8 *dst_pixels, struct pixel_argb_u16 *in_pixel);
52 };
53
54 /**
55  * vkms_plane_state - Driver specific plane state
56  * @base: base plane state
57  * @frame_info: data required for composing computation
58  */
59 struct vkms_plane_state {
60         struct drm_shadow_plane_state base;
61         struct vkms_frame_info *frame_info;
62         void (*pixel_read)(u8 *src_buffer, struct pixel_argb_u16 *out_pixel);
63 };
64
65 struct vkms_plane {
66         struct drm_plane base;
67 };
68
69 struct vkms_color_lut {
70         struct drm_color_lut *base;
71         size_t lut_length;
72         s64 channel_value2index_ratio;
73 };
74
75 /**
76  * vkms_crtc_state - Driver specific CRTC state
77  * @base: base CRTC state
78  * @composer_work: work struct to compose and add CRC entries
79  * @n_frame_start: start frame number for computed CRC
80  * @n_frame_end: end frame number for computed CRC
81  */
82 struct vkms_crtc_state {
83         struct drm_crtc_state base;
84         struct work_struct composer_work;
85
86         int num_active_planes;
87         /* stack of active planes for crc computation, should be in z order */
88         struct vkms_plane_state **active_planes;
89         struct vkms_writeback_job *active_writeback;
90         struct vkms_color_lut gamma_lut;
91
92         /* below four are protected by vkms_output.composer_lock */
93         bool crc_pending;
94         bool wb_pending;
95         u64 frame_start;
96         u64 frame_end;
97 };
98
99 struct vkms_output {
100         struct drm_crtc crtc;
101         struct drm_encoder encoder;
102         struct drm_connector connector;
103         struct drm_writeback_connector wb_connector;
104         struct hrtimer vblank_hrtimer;
105         ktime_t period_ns;
106         struct drm_pending_vblank_event *event;
107         /* ordered wq for composer_work */
108         struct workqueue_struct *composer_workq;
109         /* protects concurrent access to composer */
110         spinlock_t lock;
111
112         /* protected by @lock */
113         bool composer_enabled;
114         struct vkms_crtc_state *composer_state;
115
116         spinlock_t composer_lock;
117 };
118
119 struct vkms_device;
120
121 struct vkms_config {
122         bool writeback;
123         bool cursor;
124         bool overlay;
125         /* only set when instantiated */
126         struct vkms_device *dev;
127 };
128
129 struct vkms_device {
130         struct drm_device drm;
131         struct platform_device *platform;
132         struct vkms_output output;
133         const struct vkms_config *config;
134 };
135
136 #define drm_crtc_to_vkms_output(target) \
137         container_of(target, struct vkms_output, crtc)
138
139 #define drm_device_to_vkms_device(target) \
140         container_of(target, struct vkms_device, drm)
141
142 #define to_vkms_crtc_state(target)\
143         container_of(target, struct vkms_crtc_state, base)
144
145 #define to_vkms_plane_state(target)\
146         container_of(target, struct vkms_plane_state, base.base)
147
148 /* CRTC */
149 int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
150                    struct drm_plane *primary, struct drm_plane *cursor);
151
152 int vkms_output_init(struct vkms_device *vkmsdev, int index);
153
154 struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
155                                    enum drm_plane_type type, int index);
156
157 /* CRC Support */
158 const char *const *vkms_get_crc_sources(struct drm_crtc *crtc,
159                                         size_t *count);
160 int vkms_set_crc_source(struct drm_crtc *crtc, const char *src_name);
161 int vkms_verify_crc_source(struct drm_crtc *crtc, const char *source_name,
162                            size_t *values_cnt);
163
164 /* Composer Support */
165 void vkms_composer_worker(struct work_struct *work);
166 void vkms_set_composer(struct vkms_output *out, bool enabled);
167 void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state *plane, int y);
168 void vkms_writeback_row(struct vkms_writeback_job *wb, const struct line_buffer *src_buffer, int y);
169
170 /* Writeback */
171 int vkms_enable_writeback_connector(struct vkms_device *vkmsdev);
172
173 #endif /* _VKMS_DRV_H_ */