LXR linux/drivers/gpu/drm/arm/display/komeda/komeda

   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(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
  48static void evt_sprintf(struct komeda_str *str, u64 evt, const char *msg)
  49{
  50        if (evt)
  51                komeda_sprintf(str, msg);
  52}
  53
  54static 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
 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(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}
 159