With this tweak the test pass:
--- a/tests/kms_sysfs_edid_timing.c
+++ b/tests/kms_sysfs_edid_timing.c
@@ -99,7 +99,7 @@ int main(int argc, char **argv)
edid_size = read(fd_edid, edid, 512);
threshold = THRESHOLD_PER_EDID_BLOCK * (edid_size / 128);
- if (lspcon_present || (edid_size > 128 &&
+ if (lspcon_present || (edid_size >= 128 &&
!strncmp(de->d_name, "card0-HDMI", 10))) {
threshold *= HDMI_THRESHOLD_MULTIPLIER;
}
> -----Original Message-----
> From: Lofstedt, Marta
> Sent: Thursday, August 10, 2017 9:41 AM
> To: Taylor, Clinton A <clinton.a.taylor@xxxxxxxxx>; intel-
> gfx@xxxxxxxxxxxxxxxxxxxxx
> Cc: Vetter, Daniel <daniel.vetter@xxxxxxxxx>
> Subject: RE: [PATCH v3 i-g-t] tests/kms: increase max threshold time for edid
> read
>
> Sorry Clinton I fail the test again on my BDW NUCi5 with this V3.
>
> Check: https://bugs.freedesktop.org/show_bug.cgi?id=100047
> For details.
>
> /Marta
>
> > -----Original Message-----
> > From: Taylor, Clinton A
> > Sent: Thursday, August 10, 2017 1:52 AM
> > To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > Cc: Taylor, Clinton A <clinton.a.taylor@xxxxxxxxx>; Vetter, Daniel
> > <daniel.vetter@xxxxxxxxx>; Lofstedt, Marta <marta.lofstedt@xxxxxxxxx>
> > Subject: [PATCH v3 i-g-t] tests/kms: increase max threshold time for
> > edid read
> >
> > From: Clint Taylor <clinton.a.taylor@xxxxxxxxx>
> >
> > Current 50ms max threshold timing for an EDID read is very close to
> > the actual time for a 2 block HDMI EDID read. Adjust the timings base
> > on connector type as DP reads are at 1 MBit and HDMI at 100K bit. If
> > an LSPcon is connected to device under test the -l option should be
> > passed to update the threshold timing to allow the LSPcon to read the EDID
> at the HDMI timing.
> > The -l option should be used when LSPcon is on the motherboard or if a
> > USB_C->HDMI converter is present
> >
> > V2: Adjust timings based on connector type, EDID size, and Add an
> > option to specify if an LSPcon is present.
> > V3: added bugzilla to commit message
> >
> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100047
> >
> > Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> > Cc: Marta Lofstedt <marta.lofstedt@xxxxxxxxx>
> > Signed-off-by: Clint Taylor <clinton.a.taylor@xxxxxxxxx>
> > ---
> > tests/kms_sysfs_edid_timing.c | 76
> > +++++++++++++++++++++++++++++++++++--------
> > 1 file changed, 62 insertions(+), 14 deletions(-)
> >
> > diff --git a/tests/kms_sysfs_edid_timing.c
> > b/tests/kms_sysfs_edid_timing.c index 1201388..441dfee 100644
> > --- a/tests/kms_sysfs_edid_timing.c
> > +++ b/tests/kms_sysfs_edid_timing.c
> > @@ -26,21 +26,46 @@
> > #include <fcntl.h>
> > #include <sys/stat.h>
> >
> > -#define THRESHOLD_PER_CONNECTOR 10
> > -#define THRESHOLD_TOTAL 50
> > -#define CHECK_TIMES 15
> > +#define THRESHOLD_FOR_EMPTY_CONNECTOR 10
> > +#define THRESHOLD_PER_EDID_BLOCK 5
> > +#define HDMI_THRESHOLD_MULTIPLIER 10
> > +#define CHECK_TIMES 10
> >
> > IGT_TEST_DESCRIPTION("This check the time we take to read the content
> > of all "
> > "the possible connectors. Without the edid -
> ENXIO patch "
> >
> > "(http://permalink.gmane.org/gmane.comp.video.dri.devel/62083), "
> > - "we sometimes take a *really* long time. "
> > - "So let's just check for some reasonable
> > timing here");
> > + "we sometimes take a *really* long time. So
> > let's check "
> > + "an approximate time per edid block based on
> > connector "
> > + "type. The -l option adjusts DP timing to
> > reflect HDMI read "
> > + "timings from LSPcon.");
> > +
> > +/* The -l option has been added to correctly handle timings when an
> > +LSPcon is
> > + * present. This could be on the platform itself or in a USB_C->HDMI
> > converter.
> > + * With LSPCon EDID read timing will need to change from the 1 Mbit
> > +AUX
> > + * bus speed to the 100 Kbit HDMI DDC bus speed */ bool
> > +lspcon_present;
> >
> > +static int opt_handler(int opt, int opt_index, void *data) {
> > + if (opt == 'l') {
> > + lspcon_present = true;
> > + igt_info("set LSPcon present on DP ports\n");
> > + }
> >
> > -igt_simple_main
> > + return 0;
> > +}
> > +
> > +int main(int argc, char **argv)
> > {
> > DIR *dirp;
> > struct dirent *de;
> > + lspcon_present = false;
> > +
> > + igt_simple_init_parse_opts(&argc, argv, "l", NULL, NULL,
> > + opt_handler,
> > NULL);
> > +
> > + igt_skip_on_simulation();
> >
> > dirp = opendir("/sys/class/drm");
> > igt_assert(dirp != NULL);
> > @@ -49,17 +74,36 @@ igt_simple_main
> > struct igt_mean mean = {};
> > struct stat st;
> > char path[PATH_MAX];
> > - int i;
> > + char edid_path[PATH_MAX];
> > + char edid[512]; /* enough for 4 block edid */
> > + unsigned long edid_size = 0;
> > + int i, fd_edid;
> > + unsigned int threshold = 0;
> >
> > if (*de->d_name == '.')
> > continue;;
> >
> > snprintf(path, sizeof(path),
> > "/sys/class/drm/%s/status",
> > de->d_name);
> > + snprintf(edid_path, sizeof(edid_path),
> > "/sys/class/drm/%s/edid",
> > + de->d_name);
> >
> > if (stat(path, &st))
> > continue;
> >
> > + fd_edid = open(edid_path, O_RDONLY);
> > + if (fd_edid == -1) {
> > + igt_warn("Read Error EDID\n");
> > + continue;
> > + }
> > +
> > + edid_size = read(fd_edid, edid, 512);
> > + threshold = THRESHOLD_PER_EDID_BLOCK *
> > (edid_size / 128);
> > + if (lspcon_present || (edid_size > 128 &&
> > + !strncmp(de->d_name, "card0-HDMI", 10))) {
> > + threshold *=
> > HDMI_THRESHOLD_MULTIPLIER;
> > + }
> > +
> > igt_mean_init(&mean);
> > for (i = 0; i < CHECK_TIMES; i++) {
> > struct timespec ts = {};
> > @@ -76,22 +120,26 @@ igt_simple_main
> > }
> >
> > igt_debug("%s: mean.max %.2fns, %.2fus,
> %.2fms, "
> > - "mean.avg %.2fns, %.2fus,
> > %.2fms\n",
> > + "mean.avg %.2fns, %.2fus,
> > %.2fms, "
> > + "edid_size %lu, threshold %d\n",
> > de->d_name,
> > mean.max, mean.max / 1e3,
> > mean.max / 1e6,
> > - mean.mean, mean.mean / 1e3,
> > mean.mean / 1e6);
> > + mean.mean, mean.mean / 1e3,
> > mean.mean / 1e6,
> > + edid_size, threshold);
> >
> > - if (mean.max > (THRESHOLD_PER_CONNECTOR
> > * 1e6)) {
> > + if (edid_size == 0 &&
> > + (mean.max >
> > (THRESHOLD_FOR_EMPTY_CONNECTOR * 1e6))) {
> > igt_warn("%s: probe time exceed
> > 10ms, "
> > "max=%.2fms,
> > avg=%.2fms\n", de->d_name,
> > mean.max / 1e6,
> > mean.mean / 1e6);
> > }
> > - igt_assert_f(mean.mean < (THRESHOLD_TOTAL
> > * 1e6),
> > - "%s: average probe time
> > exceeded 50ms, "
> > - "max=%.2fms, avg=%.2fms\n",
> > de->d_name,
> > + if (edid_size > 0)
> > + igt_assert_f(mean.mean <
> > (threshold * 1e6),
> > + "%s: average probe time
> > exceeded %dms, "
> > + "max=%.2fms, avg=%.2fms\n",
> > de->d_name, threshold,
> > mean.max / 1e6, mean.mean /
> > 1e6);
> >
> > }
> > closedir(dirp);
> > -
> > + igt_exit();
> > }
> > --
> > 1.9.1
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