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/*
* Copyright © 2019 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
*/
/**
* TEST: kms dp aux dev
* Category: Display
* Description: Test that /dev/drm_dp_aux reads work
*/
#include "config.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include "igt.h"
#include "igt_kms.h"
/**
* SUBTEST:
* Description: Test that /dev/drm_dp_aux reads work
* Driver requirement: i915, xe
* Mega feature: General Display Features
*/
IGT_TEST_DESCRIPTION("Test that /dev/drm_dp_aux reads work");
static bool is_mst_connector(int drm_fd, uint32_t connector_id)
{
return kmstest_get_property(drm_fd, connector_id,
DRM_MODE_OBJECT_CONNECTOR,
"PATH", NULL,
NULL, NULL);
}
static bool sink_detect_error(int drm_fd, uint32_t connector_id, int error_code)
{
switch (error_code) {
case ETIMEDOUT:
case ENXIO:
return true;
case EIO:
return is_mst_connector(drm_fd, connector_id) ||
is_amdgpu_device(drm_fd);
default:
return false;
};
}
static bool test(int drm_fd, uint32_t connector_id)
{
drmModeConnector *connector;
DIR *dir;
int dir_fd;
connector = drmModeGetConnectorCurrent(drm_fd, connector_id);
dir_fd = igt_connector_sysfs_open(drm_fd, connector);
drmModeFreeConnector(connector);
igt_assert_lte(0, dir_fd);
if (connector->connection != DRM_MODE_CONNECTED &&
is_mst_connector(drm_fd, connector_id)) {
close(dir_fd);
return false;
}
dir = fdopendir(dir_fd);
igt_assert(dir);
for (;;) {
struct dirent *ent;
char path[5 + sizeof(ent->d_name)];
uint8_t buf[16];
int fd, ret;
ent = readdir(dir);
if (!ent)
break;
if (strncmp(ent->d_name, "drm_dp_aux", 10))
continue;
snprintf(path, sizeof(path), "/dev/%s", ent->d_name);
fd = open(path, O_RDONLY);
igt_assert_lte(0, fd);
ret = read(fd, buf, sizeof(buf));
igt_info("%s: %s\n", path,
ret > 0 ? "success" : strerror(errno));
igt_assert(ret == sizeof(buf) ||
sink_detect_error(drm_fd, connector_id, errno));
close(fd);
closedir(dir);
close(dir_fd);
if (ret > 0) {
/* DPCD rev sanity check */
igt_assert_f(buf[0] == 0x10 ||
buf[0] == 0x11 ||
buf[0] == 0x12 ||
buf[0] == 0x13 ||
buf[0] == 0x14,
"Read bogus DPCD rev 0x%02x\n",
buf[0]);
/* DPCD max lane count sanity check */
igt_assert_f((buf[2] & 0x1f) == 0x01 ||
(buf[2] & 0x1f) == 0x02 ||
(buf[2] & 0x1f) == 0x04,
"Read bogus DPCD max lane count 0x%02x\n",
buf[2] & 0x1f);
}
return ret > 0;
}
closedir(dir);
close(dir_fd);
return false;
}
igt_simple_main
{
int valid_connectors = 0;
drmModeRes *res;
int drm_fd;
drm_fd = drm_open_driver_master(DRIVER_ANY);
res = drmModeGetResources(drm_fd);
igt_require(res);
for (int i = 0; i < res->count_connectors; i++)
valid_connectors += test(drm_fd, res->connectors[i]);
igt_require(valid_connectors);
drmModeFreeResources(res);
drm_close_driver(drm_fd);
}
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