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1/*
2 * Copyright (C) 2013 Red Hat
3 * Author: Rob Clark <robdclark@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#ifndef __MSM_KMS_H__
19#define __MSM_KMS_H__
20
21#include <linux/clk.h>
22#include <linux/regulator/consumer.h>
23
24#include "msm_drv.h"
25
26#define MAX_PLANE 4
27
28/* As there are different display controller blocks depending on the
29 * snapdragon version, the kms support is split out and the appropriate
30 * implementation is loaded at runtime. The kms module is responsible
31 * for constructing the appropriate planes/crtcs/encoders/connectors.
32 */
33struct msm_kms_funcs {
34 /* hw initialization: */
35 int (*hw_init)(struct msm_kms *kms);
36 /* irq handling: */
37 void (*irq_preinstall)(struct msm_kms *kms);
38 int (*irq_postinstall)(struct msm_kms *kms);
39 void (*irq_uninstall)(struct msm_kms *kms);
40 irqreturn_t (*irq)(struct msm_kms *kms);
41 int (*enable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);
42 void (*disable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);
43 /* modeset, bracketing atomic_commit(): */
44 void (*prepare_commit)(struct msm_kms *kms, struct drm_atomic_state *state);
45 void (*complete_commit)(struct msm_kms *kms, struct drm_atomic_state *state);
46 /* functions to wait for atomic commit completed on each CRTC */
47 void (*wait_for_crtc_commit_done)(struct msm_kms *kms,
48 struct drm_crtc *crtc);
49 /* misc: */
50 const struct msm_format *(*get_format)(struct msm_kms *kms, uint32_t format);
51 long (*round_pixclk)(struct msm_kms *kms, unsigned long rate,
52 struct drm_encoder *encoder);
53 int (*set_split_display)(struct msm_kms *kms,
54 struct drm_encoder *encoder,
55 struct drm_encoder *slave_encoder,
56 bool is_cmd_mode);
57 /* cleanup: */
58 void (*destroy)(struct msm_kms *kms);
59};
60
61struct msm_kms {
62 const struct msm_kms_funcs *funcs;
63
64 /* irq handling: */
65 bool in_irq;
66 struct list_head irq_list; /* list of mdp4_irq */
67 uint32_t vblank_mask; /* irq bits set for userspace vblank */
68};
69
70static inline void msm_kms_init(struct msm_kms *kms,
71 const struct msm_kms_funcs *funcs)
72{
73 kms->funcs = funcs;
74}
75
76struct msm_kms *mdp4_kms_init(struct drm_device *dev);
77struct msm_kms *mdp5_kms_init(struct drm_device *dev);
78
79#endif /* __MSM_KMS_H__ */
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2013 Red Hat
5 * Author: Rob Clark <robdclark@gmail.com>
6 */
7
8#ifndef __MSM_KMS_H__
9#define __MSM_KMS_H__
10
11#include <linux/clk.h>
12#include <linux/regulator/consumer.h>
13
14#include "msm_drv.h"
15
16#define MAX_PLANE 4
17
18/* As there are different display controller blocks depending on the
19 * snapdragon version, the kms support is split out and the appropriate
20 * implementation is loaded at runtime. The kms module is responsible
21 * for constructing the appropriate planes/crtcs/encoders/connectors.
22 */
23struct msm_kms_funcs {
24 /* hw initialization: */
25 int (*hw_init)(struct msm_kms *kms);
26 /* irq handling: */
27 void (*irq_preinstall)(struct msm_kms *kms);
28 int (*irq_postinstall)(struct msm_kms *kms);
29 void (*irq_uninstall)(struct msm_kms *kms);
30 irqreturn_t (*irq)(struct msm_kms *kms);
31 int (*enable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);
32 void (*disable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);
33
34 /*
35 * Atomic commit handling:
36 *
37 * Note that in the case of async commits, the funcs which take
38 * a crtc_mask (ie. ->flush_commit(), and ->complete_commit())
39 * might not be evenly balanced with ->prepare_commit(), however
40 * each crtc that effected by a ->prepare_commit() (potentially
41 * multiple times) will eventually (at end of vsync period) be
42 * flushed and completed.
43 *
44 * This has some implications about tracking of cleanup state,
45 * for example SMP blocks to release after commit completes. Ie.
46 * cleanup state should be also duplicated in the various
47 * duplicate_state() methods, as the current cleanup state at
48 * ->complete_commit() time may have accumulated cleanup work
49 * from multiple commits.
50 */
51
52 /**
53 * Enable/disable power/clks needed for hw access done in other
54 * commit related methods.
55 *
56 * If mdp4 is migrated to runpm, we could probably drop these
57 * and use runpm directly.
58 */
59 void (*enable_commit)(struct msm_kms *kms);
60 void (*disable_commit)(struct msm_kms *kms);
61
62 /**
63 * If the kms backend supports async commit, it should implement
64 * this method to return the time of the next vsync. This is
65 * used to determine a time slightly before vsync, for the async
66 * commit timer to run and complete an async commit.
67 */
68 ktime_t (*vsync_time)(struct msm_kms *kms, struct drm_crtc *crtc);
69
70 /**
71 * Prepare for atomic commit. This is called after any previous
72 * (async or otherwise) commit has completed.
73 */
74 void (*prepare_commit)(struct msm_kms *kms, struct drm_atomic_state *state);
75
76 /**
77 * Flush an atomic commit. This is called after the hardware
78 * updates have already been pushed down to effected planes/
79 * crtcs/encoders/connectors.
80 */
81 void (*flush_commit)(struct msm_kms *kms, unsigned crtc_mask);
82
83 /**
84 * Wait for any in-progress flush to complete on the specified
85 * crtcs. This should not block if there is no in-progress
86 * commit (ie. don't just wait for a vblank), as it will also
87 * be called before ->prepare_commit() to ensure any potential
88 * "async" commit has completed.
89 */
90 void (*wait_flush)(struct msm_kms *kms, unsigned crtc_mask);
91
92 /**
93 * Clean up after commit is completed. This is called after
94 * ->wait_flush(), to give the backend a chance to do any
95 * post-commit cleanup.
96 */
97 void (*complete_commit)(struct msm_kms *kms, unsigned crtc_mask);
98
99 /*
100 * Format handling:
101 */
102
103 /* get msm_format w/ optional format modifiers from drm_mode_fb_cmd2 */
104 const struct msm_format *(*get_format)(struct msm_kms *kms,
105 const uint32_t format,
106 const uint64_t modifiers);
107 /* do format checking on format modified through fb_cmd2 modifiers */
108 int (*check_modified_format)(const struct msm_kms *kms,
109 const struct msm_format *msm_fmt,
110 const struct drm_mode_fb_cmd2 *cmd,
111 struct drm_gem_object **bos);
112
113 /* misc: */
114 long (*round_pixclk)(struct msm_kms *kms, unsigned long rate,
115 struct drm_encoder *encoder);
116 int (*set_split_display)(struct msm_kms *kms,
117 struct drm_encoder *encoder,
118 struct drm_encoder *slave_encoder,
119 bool is_cmd_mode);
120 void (*set_encoder_mode)(struct msm_kms *kms,
121 struct drm_encoder *encoder,
122 bool cmd_mode);
123 /* cleanup: */
124 void (*destroy)(struct msm_kms *kms);
125
126 /* snapshot: */
127 void (*snapshot)(struct msm_disp_state *disp_state, struct msm_kms *kms);
128
129#ifdef CONFIG_DEBUG_FS
130 /* debugfs: */
131 int (*debugfs_init)(struct msm_kms *kms, struct drm_minor *minor);
132#endif
133};
134
135struct msm_kms;
136
137/*
138 * A per-crtc timer for pending async atomic flushes. Scheduled to expire
139 * shortly before vblank to flush pending async updates.
140 */
141struct msm_pending_timer {
142 struct hrtimer timer;
143 struct kthread_work work;
144 struct kthread_worker *worker;
145 struct msm_kms *kms;
146 unsigned crtc_idx;
147};
148
149struct msm_kms {
150 const struct msm_kms_funcs *funcs;
151 struct drm_device *dev;
152
153 /* irq number to be passed on to drm_irq_install */
154 int irq;
155
156 /* mapper-id used to request GEM buffer mapped for scanout: */
157 struct msm_gem_address_space *aspace;
158
159 /* disp snapshot support */
160 struct kthread_worker *dump_worker;
161 struct kthread_work dump_work;
162 struct mutex dump_mutex;
163
164 /*
165 * For async commit, where ->flush_commit() and later happens
166 * from the crtc's pending_timer close to end of the frame:
167 */
168 struct mutex commit_lock[MAX_CRTCS];
169 unsigned pending_crtc_mask;
170 struct msm_pending_timer pending_timers[MAX_CRTCS];
171};
172
173static inline int msm_kms_init(struct msm_kms *kms,
174 const struct msm_kms_funcs *funcs)
175{
176 unsigned i, ret;
177
178 for (i = 0; i < ARRAY_SIZE(kms->commit_lock); i++)
179 mutex_init(&kms->commit_lock[i]);
180
181 kms->funcs = funcs;
182
183 for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++) {
184 ret = msm_atomic_init_pending_timer(&kms->pending_timers[i], kms, i);
185 if (ret) {
186 return ret;
187 }
188 }
189
190 return 0;
191}
192
193static inline void msm_kms_destroy(struct msm_kms *kms)
194{
195 unsigned i;
196
197 for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++)
198 msm_atomic_destroy_pending_timer(&kms->pending_timers[i]);
199}
200
201struct msm_kms *mdp4_kms_init(struct drm_device *dev);
202struct msm_kms *mdp5_kms_init(struct drm_device *dev);
203struct msm_kms *dpu_kms_init(struct drm_device *dev);
204
205struct msm_mdss_funcs {
206 int (*enable)(struct msm_mdss *mdss);
207 int (*disable)(struct msm_mdss *mdss);
208 void (*destroy)(struct drm_device *dev);
209};
210
211struct msm_mdss {
212 struct drm_device *dev;
213 const struct msm_mdss_funcs *funcs;
214};
215
216int mdp5_mdss_init(struct drm_device *dev);
217int dpu_mdss_init(struct drm_device *dev);
218
219#define for_each_crtc_mask(dev, crtc, crtc_mask) \
220 drm_for_each_crtc(crtc, dev) \
221 for_each_if (drm_crtc_mask(crtc) & (crtc_mask))
222
223#define for_each_crtc_mask_reverse(dev, crtc, crtc_mask) \
224 drm_for_each_crtc_reverse(crtc, dev) \
225 for_each_if (drm_crtc_mask(crtc) & (crtc_mask))
226
227#endif /* __MSM_KMS_H__ */