The name string is allocated on the heap, so the memcmp() function will
not return 0 even though two nodes share the same device name.
Also, the device info will not be populated when counting the available
drm devices. For example, using drmGetDevices2(0, NULL, 0). In that
case, drmGetDevices2() will eventually crash in drmDevicesEqual() while
merging nodes belonging to the same device due to passing null pointers
to memcmp().
This change adds faux device name to businfo. The businfo is populated
regardless whether device info is needed, which is needed to make the
drmGetDevices2(0, NULL, 0) case work. drmFauxBusInfo can also be used
with the memcmp() function to match the other cases in drmDevicesEqual().
Signed-off-by: Vlad Zahorodnii <vlad.zahorodnii@kde.org>
Linux 6.14 included a new type of bus, the "faux" bus [1].
The next version of Linux (v6.16) will move the VKMS driver to the faux
bus. See kernel commit 5686601908d8 ("drm/vkms: convert to use
faux_device") for more details.
Add support for the faux bus so drmGetDeviceFromDevId(), drmGetDevices()
and drmGetDevices2() return the devices on it.
[1] https://lore.kernel.org/all/2025021023-sandstorm-precise-9f5d@gregkh/
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Error message was invalid too, negative values aren't the number of
devices, they're errno error codes.
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
While fairly close, the host1x and platform are two separate things.
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Tested-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Making the output a little bit easier to parse by human beings.
v2: Add extra whitespace (Eric)
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Tested-by: Robert Foss <robert.foss@collabora.com> (v1)
Reviewed-by: Robert Foss <robert.foss@collabora.com> (v1)
Reviewed-by: Eric Engestrom <eric@engestrom.ch> (v1)
Add a few printf statements, which should make the output easier to
parse.
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Tested-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Extend the drmdevice test with support for the newly added USB, platform
and host1x busses.
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Pass along DRM_DEVICE_GET_PCI_REVISION only when the individual nodes
are opened and update the printed messages accordingly.
v2: Attribute for the flag rename, call drmGetDevices2 w/o the flag.
v3: Keep drmParsePciDeviceInfo() hunk in previous patch.
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
A simple example of how to use/what is the new drm{Get,Free}Devices()
interface.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
