1// SPDX-License-Identifier: GPL-2.0
2/*
3 * (C) COPYRIGHT 2019 ARM Limited. All rights reserved.
4 * Author: James.Qian.Wang <james.qian.wang@arm.com>
5 *
6 */
7#include <drm/drm_atomic.h>
8#include <drm/drm_print.h>
9
10#include "komeda_dev.h"
11
12struct komeda_str {
13 char *str;
14 u32 sz;
15 u32 len;
16};
17
18/* return 0 on success, < 0 on no space.
19 */
20__printf(2, 3)
21static int komeda_sprintf(struct komeda_str *str, const char *fmt, ...)
22{
23 va_list args;
24 int num, free_sz;
25 int err;
26
27 free_sz = str->sz - str->len - 1;
28 if (free_sz <= 0)
29 return -ENOSPC;
30
31 va_start(args, fmt);
32
33 num = vsnprintf(buf: str->str + str->len, size: free_sz, fmt, args);
34
35 va_end(args);
36
37 if (num < free_sz) {
38 str->len += num;
39 err = 0;
40 } else {
41 str->len = str->sz - 1;
42 err = -ENOSPC;
43 }
44
45 return err;
46}
47
48static void evt_sprintf(struct komeda_str *str, u64 evt, const char *msg)
49{
50 if (evt)
51 komeda_sprintf(str, fmt: msg);
52}
53
54static void evt_str(struct komeda_str *str, u64 events)
55{
56 if (events == 0ULL) {
57 komeda_sprintf(str, fmt: "None");
58 return;
59 }
60
61 evt_sprintf(str, evt: events & KOMEDA_EVENT_VSYNC, msg: "VSYNC|");
62 evt_sprintf(str, evt: events & KOMEDA_EVENT_FLIP, msg: "FLIP|");
63 evt_sprintf(str, evt: events & KOMEDA_EVENT_EOW, msg: "EOW|");
64 evt_sprintf(str, evt: events & KOMEDA_EVENT_MODE, msg: "OP-MODE|");
65
66 evt_sprintf(str, evt: events & KOMEDA_EVENT_URUN, msg: "UNDERRUN|");
67 evt_sprintf(str, evt: events & KOMEDA_EVENT_OVR, msg: "OVERRUN|");
68
69 /* GLB error */
70 evt_sprintf(str, evt: events & KOMEDA_ERR_MERR, msg: "MERR|");
71 evt_sprintf(str, evt: events & KOMEDA_ERR_FRAMETO, msg: "FRAMETO|");
72
73 /* DOU error */
74 evt_sprintf(str, evt: events & KOMEDA_ERR_DRIFTTO, msg: "DRIFTTO|");
75 evt_sprintf(str, evt: events & KOMEDA_ERR_FRAMETO, msg: "FRAMETO|");
76 evt_sprintf(str, evt: events & KOMEDA_ERR_TETO, msg: "TETO|");
77 evt_sprintf(str, evt: events & KOMEDA_ERR_CSCE, msg: "CSCE|");
78
79 /* LPU errors or events */
80 evt_sprintf(str, evt: events & KOMEDA_EVENT_IBSY, msg: "IBSY|");
81 evt_sprintf(str, evt: events & KOMEDA_EVENT_EMPTY, msg: "EMPTY|");
82 evt_sprintf(str, evt: events & KOMEDA_EVENT_FULL, msg: "FULL|");
83 evt_sprintf(str, evt: events & KOMEDA_ERR_AXIE, msg: "AXIE|");
84 evt_sprintf(str, evt: events & KOMEDA_ERR_ACE0, msg: "ACE0|");
85 evt_sprintf(str, evt: events & KOMEDA_ERR_ACE1, msg: "ACE1|");
86 evt_sprintf(str, evt: events & KOMEDA_ERR_ACE2, msg: "ACE2|");
87 evt_sprintf(str, evt: events & KOMEDA_ERR_ACE3, msg: "ACE3|");
88
89 /* LPU TBU errors*/
90 evt_sprintf(str, evt: events & KOMEDA_ERR_TCF, msg: "TCF|");
91 evt_sprintf(str, evt: events & KOMEDA_ERR_TTNG, msg: "TTNG|");
92 evt_sprintf(str, evt: events & KOMEDA_ERR_TITR, msg: "TITR|");
93 evt_sprintf(str, evt: events & KOMEDA_ERR_TEMR, msg: "TEMR|");
94 evt_sprintf(str, evt: events & KOMEDA_ERR_TTF, msg: "TTF|");
95
96 /* CU errors*/
97 evt_sprintf(str, evt: events & KOMEDA_ERR_CPE, msg: "COPROC|");
98 evt_sprintf(str, evt: events & KOMEDA_ERR_ZME, msg: "ZME|");
99 evt_sprintf(str, evt: events & KOMEDA_ERR_CFGE, msg: "CFGE|");
100 evt_sprintf(str, evt: events & KOMEDA_ERR_TEMR, msg: "TEMR|");
101
102 if (str->len > 0 && (str->str[str->len - 1] == '|')) {
103 str->str[str->len - 1] = 0;
104 str->len--;
105 }
106}
107
108static bool is_new_frame(struct komeda_events *a)
109{
110 return (a->pipes[0] | a->pipes[1]) &
111 (KOMEDA_EVENT_FLIP | KOMEDA_EVENT_EOW);
112}
113
114void komeda_print_events(struct komeda_events *evts, struct drm_device *dev)
115{
116 u64 print_evts = 0;
117 static bool en_print = true;
118 struct komeda_dev *mdev = dev->dev_private;
119 u16 const err_verbosity = mdev->err_verbosity;
120 u64 evts_mask = evts->global | evts->pipes[0] | evts->pipes[1];
121
122 /* reduce the same msg print, only print the first evt for one frame */
123 if (evts->global || is_new_frame(a: evts))
124 en_print = true;
125 if (!(err_verbosity & KOMEDA_DEV_PRINT_DISABLE_RATELIMIT) && !en_print)
126 return;
127
128 if (err_verbosity & KOMEDA_DEV_PRINT_ERR_EVENTS)
129 print_evts |= KOMEDA_ERR_EVENTS;
130 if (err_verbosity & KOMEDA_DEV_PRINT_WARN_EVENTS)
131 print_evts |= KOMEDA_WARN_EVENTS;
132 if (err_verbosity & KOMEDA_DEV_PRINT_INFO_EVENTS)
133 print_evts |= KOMEDA_INFO_EVENTS;
134
135 if (evts_mask & print_evts) {
136 char msg[256];
137 struct komeda_str str;
138 struct drm_printer p = drm_info_printer(dev: dev->dev);
139
140 str.str = msg;
141 str.sz = sizeof(msg);
142 str.len = 0;
143
144 komeda_sprintf(str: &str, fmt: "gcu: ");
145 evt_str(str: &str, events: evts->global);
146 komeda_sprintf(str: &str, fmt: ", pipes[0]: ");
147 evt_str(str: &str, events: evts->pipes[0]);
148 komeda_sprintf(str: &str, fmt: ", pipes[1]: ");
149 evt_str(str: &str, events: evts->pipes[1]);
150
151 DRM_ERROR("err detect: %s\n", msg);
152 if ((err_verbosity & KOMEDA_DEV_PRINT_DUMP_STATE_ON_EVENT) &&
153 (evts_mask & (KOMEDA_ERR_EVENTS | KOMEDA_WARN_EVENTS)))
154 drm_state_dump(dev, p: &p);
155
156 en_print = false;
157 }
158}
159

source code of linux/drivers/gpu/drm/arm/display/komeda/komeda_event.c