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igt/pm_rpm: Wait for PCI D3

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The transition to PCI device state D3 is not instantaneous and only
started when runtime suspended. Allow the driver/hardware a little bit
of time to complete the transition before declaring a test failure.

References: https://bugs.freedesktop.org/show_bug.cgi?id=93123
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-03-07 14:01:18 +00:00
parent 174a06b129
commit ec1ac2e2e9
1 changed files with 4 additions and 8 deletions
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12
tests/pm_rpm.c
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@ -1337,15 +1337,13 @@ static void reg_read_ioctl_subtest(void)
static bool device_in_pci_d3(void) static bool device_in_pci_d3(void)
{ {
struct pci_device *pci_dev;
int rc;
uint16_t val; uint16_t val;
int rc;
pci_dev = intel_get_pci_device(); rc = pci_device_cfg_read_u16(intel_get_pci_device(), &val, 0xd4);
rc = pci_device_cfg_read_u16(pci_dev, &val, 0xd4);
igt_assert_eq(rc, 0); igt_assert_eq(rc, 0);
igt_debug("%s: PCI D3 state=%d\n", __func__, val & 0x3);
return (val & 0x3) == 0x3; return (val & 0x3) == 0x3;
} }
@ -1354,11 +1352,9 @@ static void pci_d3_state_subtest(void)
igt_require(has_runtime_pm); igt_require(has_runtime_pm);
disable_all_screens_and_wait(&ms_data); disable_all_screens_and_wait(&ms_data);
igt_assert(igt_wait(device_in_pci_d3(), 2000, 100));
igt_assert(device_in_pci_d3());
enable_one_screen_and_wait(&ms_data); enable_one_screen_and_wait(&ms_data);
igt_assert(!device_in_pci_d3()); igt_assert(!device_in_pci_d3());
} }