diff options
| author | Dave Airlie <airlied@redhat.com> | 2025-03-04 01:56:03 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2025-05-19 07:14:45 +1000 |
| commit | f0ddbb1eed1898286d2bd99fd6ab64ca9700d267 (patch) | |
| tree | 40e8e1ebe79cd79c9d1e267d737ad810bac98266 /include/drm | |
| parent | 284ad706ad2f50974d66dd1a22e985a5a4d329de (diff) | |
drm/dp: add option to disable zero sized address only transactions.
Some older NVIDIA and some newer NVIDIA hardware/firmware seems to
have issues with address only transactions (firmware rejects them).
Add an option to the core drm dp to avoid address only transactions,
This just puts the MOT flag removal on the last message of the transfer
and avoids the start of transfer transaction.
This with the flag set in nouveau, allows eDP probing on GB203 device.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ben Skeggs <bskeggs@nvidia.com>
Reviewed-by: Timur Tabi <ttabi@nvidia.com>
Tested-by: Timur Tabi <ttabi@nvidia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/display/drm_dp_helper.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h index 7b19192c7031..e4ca35143ff9 100644 --- a/include/drm/display/drm_dp_helper.h +++ b/include/drm/display/drm_dp_helper.h @@ -518,6 +518,11 @@ struct drm_dp_aux { * @powered_down: If true then the remote endpoint is powered down. */ bool powered_down; + + /** + * @no_zero_sized: If the hw can't use zero sized transfers (NVIDIA) + */ + bool no_zero_sized; }; int drm_dp_dpcd_probe(struct drm_dp_aux *aux, unsigned int offset); |