1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2013 Red Hat
5 * Author: Rob Clark <robdclark@gmail.com>
11 #include <linux/clk.h>
12 #include <linux/regulator/consumer.h>
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.
23 struct msm_kms_funcs
{
24 /* hw initialization: */
25 int (*hw_init
)(struct msm_kms
*kms
);
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
);
35 * Atomic commit handling:
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.
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.
53 * Enable/disable power/clks needed for hw access done in other
54 * commit related methods.
56 * If mdp4 is migrated to runpm, we could probably drop these
57 * and use runpm directly.
59 void (*enable_commit
)(struct msm_kms
*kms
);
60 void (*disable_commit
)(struct msm_kms
*kms
);
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.
68 ktime_t (*vsync_time
)(struct msm_kms
*kms
, struct drm_crtc
*crtc
);
71 * Prepare for atomic commit. This is called after any previous
72 * (async or otherwise) commit has completed.
74 void (*prepare_commit
)(struct msm_kms
*kms
, struct drm_atomic_state
*state
);
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.
81 void (*flush_commit
)(struct msm_kms
*kms
, unsigned crtc_mask
);
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.
90 void (*wait_flush
)(struct msm_kms
*kms
, unsigned crtc_mask
);
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.
97 void (*complete_commit
)(struct msm_kms
*kms
, unsigned crtc_mask
);
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
);
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
,
120 void (*set_encoder_mode
)(struct msm_kms
*kms
,
121 struct drm_encoder
*encoder
,
124 void (*destroy
)(struct msm_kms
*kms
);
125 #ifdef CONFIG_DEBUG_FS
127 int (*debugfs_init
)(struct msm_kms
*kms
, struct drm_minor
*minor
);
134 * A per-crtc timer for pending async atomic flushes. Scheduled to expire
135 * shortly before vblank to flush pending async updates.
137 struct msm_pending_timer
{
138 struct hrtimer timer
;
139 struct work_struct work
;
145 const struct msm_kms_funcs
*funcs
;
146 struct drm_device
*dev
;
148 /* irq number to be passed on to drm_irq_install */
151 /* mapper-id used to request GEM buffer mapped for scanout: */
152 struct msm_gem_address_space
*aspace
;
155 * For async commit, where ->flush_commit() and later happens
156 * from the crtc's pending_timer close to end of the frame:
158 struct mutex commit_lock
;
159 unsigned pending_crtc_mask
;
160 struct msm_pending_timer pending_timers
[MAX_CRTCS
];
163 static inline void msm_kms_init(struct msm_kms
*kms
,
164 const struct msm_kms_funcs
*funcs
)
168 mutex_init(&kms
->commit_lock
);
171 for (i
= 0; i
< ARRAY_SIZE(kms
->pending_timers
); i
++)
172 msm_atomic_init_pending_timer(&kms
->pending_timers
[i
], kms
, i
);
175 struct msm_kms
*mdp4_kms_init(struct drm_device
*dev
);
176 struct msm_kms
*mdp5_kms_init(struct drm_device
*dev
);
177 struct msm_kms
*dpu_kms_init(struct drm_device
*dev
);
179 struct msm_mdss_funcs
{
180 int (*enable
)(struct msm_mdss
*mdss
);
181 int (*disable
)(struct msm_mdss
*mdss
);
182 void (*destroy
)(struct drm_device
*dev
);
186 struct drm_device
*dev
;
187 const struct msm_mdss_funcs
*funcs
;
190 int mdp5_mdss_init(struct drm_device
*dev
);
191 int dpu_mdss_init(struct drm_device
*dev
);
193 #define for_each_crtc_mask(dev, crtc, crtc_mask) \
194 drm_for_each_crtc(crtc, dev) \
195 for_each_if (drm_crtc_mask(crtc) & (crtc_mask))
197 #endif /* __MSM_KMS_H__ */