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modetest: allocate and commit atomic request around set_property() 

Currently the atomic request is only assigned after `set_property()` is
called, leaving `dev.req` in its uninitialized state causing
`drmModeAtomicAddProperty()` to return an error code, which is printed
as `"Success"` because `errno` is not set by `libdrm` (but it would have
been when non-atomic `drmModeObjectSetProperty()` called an IOCTL
immediately):

    sony-akatsuki-row ~ $ modetest -M msm -a -w 81:ACTIVE:0
    failed to set CRTC 81 property ACTIVE to 0: Success

Solve this by assigning a new atomic request object before calling
`set_property()`, when there are properties to set.  Likewise, commit
these properties after `set_property()` even if there is no other
operation (setting modes or planes) specified.

Furthermore `drmModeObjectSetProperty()` is implemented in terms of
`DRM_IOCTL()` which already returns `-errno` when `ioctl()` returns
`-1`, so we should instead pass `ret` to `strerror()` and get an
accurate error string out of `drmModeAtomicAddProperty()` too.

Fixes: 93220283 ("tests/modetest: Add atomic support")
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
main
Marijn Suijten 2023-06-13 21:53:22 +02:00 committed by Dmitry Baryshkov
parent 7618a64633
commit dfd00c6250
1 changed files with 11 additions and 10 deletions
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21
tests/modetest/modetest.c
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@ -1073,7 +1073,7 @@ static bool set_property(struct device *dev, struct property_arg *p)
if (ret < 0)
fprintf(stderr, "failed to set %s %i property %s to %" PRIu64 ": %s\n",
obj_type, p->obj_id, p->name, p->value, strerror(errno));
obj_type, p->obj_id, p->name, p->value, strerror(-ret));
return true;
}
@ -2320,12 +2320,13 @@ int main(int argc, char **argv)
dump_resource(&dev, planes);
dump_resource(&dev, framebuffers);
if (dev.use_atomic)
dev.req = drmModeAtomicAlloc();
for (i = 0; i < prop_count; ++i)
set_property(&dev, &prop_args[i]);
if (dev.use_atomic) {
dev.req = drmModeAtomicAlloc();
if (set_preferred || (count && plane_count)) {
uint64_t cap = 0;
@ -2385,15 +2386,15 @@ int main(int argc, char **argv)
if (count)
atomic_clear_mode(&dev, pipe_args, count);
ret = drmModeAtomicCommit(dev.fd, dev.req, DRM_MODE_ATOMIC_ALLOW_MODESET, NULL);
if (ret)
fprintf(stderr, "Atomic Commit failed\n");
if (plane_count)
atomic_clear_FB(&dev, plane_args, plane_count);
}
ret = drmModeAtomicCommit(dev.fd, dev.req, DRM_MODE_ATOMIC_ALLOW_MODESET, NULL);
if (ret)
fprintf(stderr, "Atomic Commit failed\n");
if (count && plane_count)
atomic_clear_FB(&dev, plane_args, plane_count);
drmModeAtomicFree(dev.req);
} else {
if (dump_path) {