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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
// SPDX-License-Identifier: GPL-2.0
/*
* (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
* Author: James.Qian.Wang <james.qian.wang@arm.com>
*
*/
#include <linux/component.h>
#include <linux/interrupt.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_irq.h>
#include <drm/drm_vblank.h>
#include "komeda_dev.h"
#include "komeda_framebuffer.h"
#include "komeda_kms.h"
DEFINE_DRM_GEM_CMA_FOPS(komeda_cma_fops);
static int komeda_gem_cma_dumb_create(struct drm_file *file,
struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
struct komeda_dev *mdev = dev->dev_private;
u32 pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
args->pitch = ALIGN(pitch, mdev->chip.bus_width);
return drm_gem_cma_dumb_create_internal(file, dev, args);
}
static irqreturn_t komeda_kms_irq_handler(int irq, void *data)
{
struct drm_device *drm = data;
struct komeda_dev *mdev = drm->dev_private;
struct komeda_kms_dev *kms = to_kdev(drm);
struct komeda_events evts;
irqreturn_t status;
u32 i;
/* Call into the CHIP to recognize events */
memset(&evts, 0, sizeof(evts));
status = mdev->funcs->irq_handler(mdev, &evts);
/* Notify the crtc to handle the events */
for (i = 0; i < kms->n_crtcs; i++)
komeda_crtc_handle_event(&kms->crtcs[i], &evts);
return status;
}
static struct drm_driver komeda_kms_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC |
DRIVER_PRIME | DRIVER_HAVE_IRQ,
.lastclose = drm_fb_helper_lastclose,
.irq_handler = komeda_kms_irq_handler,
.gem_free_object_unlocked = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.dumb_create = komeda_gem_cma_dumb_create,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_export = drm_gem_prime_export,
.gem_prime_import = drm_gem_prime_import,
.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
.gem_prime_vmap = drm_gem_cma_prime_vmap,
.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
.gem_prime_mmap = drm_gem_cma_prime_mmap,
.fops = &komeda_cma_fops,
.name = "komeda",
.desc = "Arm Komeda Display Processor driver",
.date = "20181101",
.major = 0,
.minor = 1,
};
static void komeda_kms_commit_tail(struct drm_atomic_state *old_state)
{
struct drm_device *dev = old_state->dev;
drm_atomic_helper_commit_modeset_disables(dev, old_state);
drm_atomic_helper_commit_planes(dev, old_state, 0);
drm_atomic_helper_commit_modeset_enables(dev, old_state);
drm_atomic_helper_wait_for_flip_done(dev, old_state);
drm_atomic_helper_commit_hw_done(old_state);
drm_atomic_helper_cleanup_planes(dev, old_state);
}
static const struct drm_mode_config_helper_funcs komeda_mode_config_helpers = {
.atomic_commit_tail = komeda_kms_commit_tail,
};
static int komeda_kms_check(struct drm_device *dev,
struct drm_atomic_state *state)
{
struct drm_crtc *crtc;
struct drm_crtc_state *old_crtc_st, *new_crtc_st;
int i, err;
err = drm_atomic_helper_check_modeset(dev, state);
if (err)
return err;
/* komeda need to re-calculate resource assumption in every commit
* so need to add all affected_planes (even unchanged) to
* drm_atomic_state.
*/
for_each_oldnew_crtc_in_state(state, crtc, old_crtc_st, new_crtc_st, i) {
err = drm_atomic_add_affected_planes(state, crtc);
if (err)
return err;
}
err = drm_atomic_helper_check_planes(dev, state);
if (err)
return err;
return 0;
}
static const struct drm_mode_config_funcs komeda_mode_config_funcs = {
.fb_create = komeda_fb_create,
.atomic_check = komeda_kms_check,
.atomic_commit = drm_atomic_helper_commit,
};
static void komeda_kms_mode_config_init(struct komeda_kms_dev *kms,
struct komeda_dev *mdev)
{
struct drm_mode_config *config = &kms->base.mode_config;
drm_mode_config_init(&kms->base);
komeda_kms_setup_crtcs(kms, mdev);
/* Get value from dev */
config->min_width = 0;
config->min_height = 0;
config->max_width = 4096;
config->max_height = 4096;
config->allow_fb_modifiers = false;
config->funcs = &komeda_mode_config_funcs;
config->helper_private = &komeda_mode_config_helpers;
}
struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)
{
struct komeda_kms_dev *kms = kzalloc(sizeof(*kms), GFP_KERNEL);
struct drm_device *drm;
int err;
if (!kms)
return ERR_PTR(-ENOMEM);
drm = &kms->base;
err = drm_dev_init(drm, &komeda_kms_driver, mdev->dev);
if (err)
goto free_kms;
drm->dev_private = mdev;
komeda_kms_mode_config_init(kms, mdev);
err = komeda_kms_add_private_objs(kms, mdev);
if (err)
goto cleanup_mode_config;
err = komeda_kms_add_planes(kms, mdev);
if (err)
goto cleanup_mode_config;
err = drm_vblank_init(drm, kms->n_crtcs);
if (err)
goto cleanup_mode_config;
err = komeda_kms_add_crtcs(kms, mdev);
if (err)
goto cleanup_mode_config;
err = component_bind_all(mdev->dev, kms);
if (err)
goto cleanup_mode_config;
drm_mode_config_reset(drm);
err = drm_irq_install(drm, mdev->irq);
if (err)
goto cleanup_mode_config;
err = mdev->funcs->enable_irq(mdev);
if (err)
goto uninstall_irq;
err = drm_dev_register(drm, 0);
if (err)
goto uninstall_irq;
return kms;
uninstall_irq:
drm_irq_uninstall(drm);
cleanup_mode_config:
drm_mode_config_cleanup(drm);
komeda_kms_cleanup_private_objs(kms);
free_kms:
kfree(kms);
return ERR_PTR(err);
}
void komeda_kms_detach(struct komeda_kms_dev *kms)
{
struct drm_device *drm = &kms->base;
struct komeda_dev *mdev = drm->dev_private;
mdev->funcs->disable_irq(mdev);
drm_dev_unregister(drm);
drm_irq_uninstall(drm);
component_unbind_all(mdev->dev, drm);
komeda_kms_cleanup_private_objs(kms);
drm_mode_config_cleanup(drm);
drm->dev_private = NULL;
drm_dev_put(drm);
}
|
