torvalds/linux
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Code
aea007741b
linux/drivers/gpu
History
Imre Deak aea007741b drm/dp_mst: Fix GUID DPCD write to non-root MST branch devices 
The return value on success of drm_dp_send_dpcd_write() called for
non-root MST branch devices from drm_dp_check_mstb_guid() is the number
of bytes transferred. Atm this return value (in case of a complete read)
will be regarded incorrectly as an error by the caller of
drm_dp_check_mstb_guid(). Fix this by converting the return value for a
complete read to the expected success code (0) and for a partial read to
a failure code (-EPROTO).

Fixes: 2554da0de3 ("drm/display: dp-mst-topology: use new DCPD access helpers")
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Lyude Paul <lyude@redhat.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://lore.kernel.org/r/20250401103846.686408-1-imre.deak@intel.com
2025-04-03 17:03:01 +03:00
..
drm drm/dp_mst: Fix GUID DPCD write to non-root MST branch devices 2025-04-03 17:03:01 +03:00
host1x gpu: host1x: Remove unused host1x_debug_dump_syncpts 2025-02-28 17:44:13 +01:00
ipu-v3 gpu: ipu-v3 ipu-cpmem: Remove unused functions 2025-03-01 11:29:03 +02:00
trace
vga
Makefile