drivers/gpu/drm/arm/display/komeda/komeda_event.c

   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
  12 struct 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)
  21 static 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(str->str + str->len, 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
  48 static void evt_sprintf(struct komeda_str *str, u64 evt, const char *msg)
  49 {
  50         if (evt)
  51                 komeda_sprintf(str, msg);
  52 }
  53
  54 static void evt_str(struct komeda_str *str, u64 events)
  55 {
  56         if (events == 0ULL) {
  57                 komeda_sprintf(str, "None");
  58                 return;
  59         }
  60
  61         evt_sprintf(str, events & KOMEDA_EVENT_VSYNC, "VSYNC|");
  62         evt_sprintf(str, events & KOMEDA_EVENT_FLIP, "FLIP|");
  63         evt_sprintf(str, events & KOMEDA_EVENT_EOW, "EOW|");
  64         evt_sprintf(str, events & KOMEDA_EVENT_MODE, "OP-MODE|");
  65
  66         evt_sprintf(str, events & KOMEDA_EVENT_URUN, "UNDERRUN|");
  67         evt_sprintf(str, events & KOMEDA_EVENT_OVR, "OVERRUN|");
  68
  69         /* GLB error */
  70         evt_sprintf(str, events & KOMEDA_ERR_MERR, "MERR|");
  71         evt_sprintf(str, events & KOMEDA_ERR_FRAMETO, "FRAMETO|");
  72
  73         /* DOU error */
  74         evt_sprintf(str, events & KOMEDA_ERR_DRIFTTO, "DRIFTTO|");
  75         evt_sprintf(str, events & KOMEDA_ERR_FRAMETO, "FRAMETO|");
  76         evt_sprintf(str, events & KOMEDA_ERR_TETO, "TETO|");
  77         evt_sprintf(str, events & KOMEDA_ERR_CSCE, "CSCE|");
  78
  79         /* LPU errors or events */
  80         evt_sprintf(str, events & KOMEDA_EVENT_IBSY, "IBSY|");
  81         evt_sprintf(str, events & KOMEDA_EVENT_EMPTY, "EMPTY|");
  82         evt_sprintf(str, events & KOMEDA_EVENT_FULL, "FULL|");
  83         evt_sprintf(str, events & KOMEDA_ERR_AXIE, "AXIE|");
  84         evt_sprintf(str, events & KOMEDA_ERR_ACE0, "ACE0|");
  85         evt_sprintf(str, events & KOMEDA_ERR_ACE1, "ACE1|");
  86         evt_sprintf(str, events & KOMEDA_ERR_ACE2, "ACE2|");
  87         evt_sprintf(str, events & KOMEDA_ERR_ACE3, "ACE3|");
  88
  89         /* LPU TBU errors*/
  90         evt_sprintf(str, events & KOMEDA_ERR_TCF, "TCF|");
  91         evt_sprintf(str, events & KOMEDA_ERR_TTNG, "TTNG|");
  92         evt_sprintf(str, events & KOMEDA_ERR_TITR, "TITR|");
  93         evt_sprintf(str, events & KOMEDA_ERR_TEMR, "TEMR|");
  94         evt_sprintf(str, events & KOMEDA_ERR_TTF, "TTF|");
  95
  96         /* CU errors*/
  97         evt_sprintf(str, events & KOMEDA_ERR_CPE, "COPROC|");
  98         evt_sprintf(str, events & KOMEDA_ERR_ZME, "ZME|");
  99         evt_sprintf(str, events & KOMEDA_ERR_CFGE, "CFGE|");
 100         evt_sprintf(str, events & KOMEDA_ERR_TEMR, "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
 108 static 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
 114 void 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(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);
 139
 140                 str.str = msg;
 141                 str.sz  = sizeof(msg);
 142                 str.len = 0;
 143
 144                 komeda_sprintf(&str, "gcu: ");
 145                 evt_str(&str, evts->global);
 146                 komeda_sprintf(&str, ", pipes[0]: ");
 147                 evt_str(&str, evts->pipes[0]);
 148                 komeda_sprintf(&str, ", pipes[1]: ");
 149                 evt_str(&str, 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);
 155
 156                 en_print = false;
 157         }
 158 }