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
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*/
#ifndef __MSM_KMS_H__
#define __MSM_KMS_H__
#include <linux/clk.h>
#include <linux/regulator/consumer.h>
#include "msm_drv.h"
#define MAX_PLANE 4
/* As there are different display controller blocks depending on the
* snapdragon version, the kms support is split out and the appropriate
* implementation is loaded at runtime. The kms module is responsible
* for constructing the appropriate planes/crtcs/encoders/connectors.
*/
struct msm_kms_funcs {
/* hw initialization: */
int (*hw_init)(struct msm_kms *kms);
/* irq handling: */
void (*irq_preinstall)(struct msm_kms *kms);
int (*irq_postinstall)(struct msm_kms *kms);
void (*irq_uninstall)(struct msm_kms *kms);
irqreturn_t (*irq)(struct msm_kms *kms);
int (*enable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);
void (*disable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);
/*
* Atomic commit handling:
*
* Note that in the case of async commits, the funcs which take
* a crtc_mask (ie. ->flush_commit(), and ->complete_commit())
* might not be evenly balanced with ->prepare_commit(), however
* each crtc that effected by a ->prepare_commit() (potentially
* multiple times) will eventually (at end of vsync period) be
* flushed and completed.
*
* This has some implications about tracking of cleanup state,
* for example SMP blocks to release after commit completes. Ie.
* cleanup state should be also duplicated in the various
* duplicate_state() methods, as the current cleanup state at
* ->complete_commit() time may have accumulated cleanup work
* from multiple commits.
*/
/**
* Enable/disable power/clks needed for hw access done in other
* commit related methods.
*
* If mdp4 is migrated to runpm, we could probably drop these
* and use runpm directly.
*/
void (*enable_commit)(struct msm_kms *kms);
void (*disable_commit)(struct msm_kms *kms);
/**
* @check_mode_changed:
*
* Verify if the commit requires a full modeset on one of CRTCs.
*/
int (*check_mode_changed)(struct msm_kms *kms, struct drm_atomic_state *state);
/**
* Prepare for atomic commit. This is called after any previous
* (async or otherwise) commit has completed.
*/
void (*prepare_commit)(struct msm_kms *kms, struct drm_atomic_state *state);
/**
* Flush an atomic commit. This is called after the hardware
* updates have already been pushed down to effected planes/
* crtcs/encoders/connectors.
*/
void (*flush_commit)(struct msm_kms *kms, unsigned crtc_mask);
/**
* Wait for any in-progress flush to complete on the specified
* crtcs. This should not block if there is no in-progress
* commit (ie. don't just wait for a vblank), as it will also
* be called before ->prepare_commit() to ensure any potential
* "async" commit has completed.
*/
void (*wait_flush)(struct msm_kms *kms, unsigned crtc_mask);
/**
* Clean up after commit is completed. This is called after
* ->wait_flush(), to give the backend a chance to do any
* post-commit cleanup.
*/
void (*complete_commit)(struct msm_kms *kms, unsigned crtc_mask);
/*
* Format handling:
*/
/* misc: */
long (*round_pixclk)(struct msm_kms *kms, unsigned long rate,
struct drm_encoder *encoder);
/* cleanup: */
void (*destroy)(struct msm_kms *kms);
/* snapshot: */
void (*snapshot)(struct msm_disp_state *disp_state, struct msm_kms *kms);
#ifdef CONFIG_DEBUG_FS
/* debugfs: */
int (*debugfs_init)(struct msm_kms *kms, struct drm_minor *minor);
#endif
};
struct msm_kms;
/*
* A per-crtc timer for pending async atomic flushes. Scheduled to expire
* shortly before vblank to flush pending async updates.
*/
struct msm_pending_timer {
struct msm_hrtimer_work work;
struct kthread_worker *worker;
struct msm_kms *kms;
unsigned crtc_idx;
};
struct msm_kms {
const struct msm_kms_funcs *funcs;
struct drm_device *dev;
/* irq number to be passed on to msm_irq_install */
int irq;
bool irq_requested;
/* rate limit the snapshot capture to once per attach */
atomic_t fault_snapshot_capture;
/* mapper-id used to request GEM buffer mapped for scanout: */
struct msm_gem_address_space *aspace;
/* disp snapshot support */
struct kthread_worker *dump_worker;
struct kthread_work dump_work;
struct mutex dump_mutex;
/*
* For async commit, where ->flush_commit() and later happens
* from the crtc's pending_timer close to end of the frame:
*/
struct mutex commit_lock[MAX_CRTCS];
unsigned pending_crtc_mask;
struct msm_pending_timer pending_timers[MAX_CRTCS];
};
static inline int msm_kms_init(struct msm_kms *kms,
const struct msm_kms_funcs *funcs)
{
unsigned i, ret;
for (i = 0; i < ARRAY_SIZE(kms->commit_lock); i++)
mutex_init(&kms->commit_lock[i]);
kms->funcs = funcs;
for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++) {
ret = msm_atomic_init_pending_timer(&kms->pending_timers[i], kms, i);
if (ret) {
return ret;
}
}
return 0;
}
static inline void msm_kms_destroy(struct msm_kms *kms)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++)
msm_atomic_destroy_pending_timer(&kms->pending_timers[i]);
}
#define for_each_crtc_mask(dev, crtc, crtc_mask) \
drm_for_each_crtc(crtc, dev) \
for_each_if (drm_crtc_mask(crtc) & (crtc_mask))
#define for_each_crtc_mask_reverse(dev, crtc, crtc_mask) \
drm_for_each_crtc_reverse(crtc, dev) \
for_each_if (drm_crtc_mask(crtc) & (crtc_mask))
int msm_drm_kms_init(struct device *dev, const struct drm_driver *drv);
void msm_drm_kms_uninit(struct device *dev);
#endif /* __MSM_KMS_H__ */
|
