blob: f7df6393d38fe3a83a4aa3e517c6b7a6add3c481 (
plain)
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
|
// SPDX-License-Identifier: GPL-2.0+
/* Copyright (C) 2026 Raspberry Pi */
#include <linux/clk.h>
#include <drm/drm_print.h>
#include "v3d_drv.h"
#include "v3d_regs.h"
static int
v3d_resume_sms(struct v3d_dev *v3d)
{
if (v3d->ver < V3D_GEN_71)
return 0;
V3D_SMS_WRITE(V3D_SMS_TEE_CS, V3D_SMS_CLEAR_POWER_OFF);
if (wait_for((V3D_GET_FIELD(V3D_SMS_READ(V3D_SMS_TEE_CS),
V3D_SMS_STATE) == V3D_SMS_IDLE), 100)) {
drm_err(&v3d->drm, "Failed to power up SMS\n");
return -ETIMEDOUT;
}
v3d_reset_sms(v3d);
return 0;
}
static int
v3d_suspend_sms(struct v3d_dev *v3d)
{
if (v3d->ver < V3D_GEN_71)
return 0;
V3D_SMS_WRITE(V3D_SMS_TEE_CS, V3D_SMS_POWER_OFF);
if (wait_for((V3D_GET_FIELD(V3D_SMS_READ(V3D_SMS_TEE_CS),
V3D_SMS_STATE) == V3D_SMS_POWER_OFF_STATE), 100)) {
drm_err(&v3d->drm, "Failed to power off SMS\n");
return -ETIMEDOUT;
}
return 0;
}
int v3d_power_suspend(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct v3d_dev *v3d = to_v3d_dev(drm);
int ret;
v3d_irq_disable(v3d);
v3d_clean_caches(v3d);
ret = v3d_suspend_sms(v3d);
if (ret) {
v3d_irq_enable(v3d);
return ret;
}
clk_disable_unprepare(v3d->clk);
return 0;
}
int v3d_power_resume(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct v3d_dev *v3d = to_v3d_dev(drm);
int ret;
ret = clk_prepare_enable(v3d->clk);
if (ret)
return ret;
ret = v3d_resume_sms(v3d);
if (ret) {
clk_disable_unprepare(v3d->clk);
return ret;
}
v3d_init_hw_state(v3d);
v3d_mmu_set_page_table(v3d);
v3d_irq_enable(v3d);
return 0;
}
|
