diff options
| author | Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> | 2021-10-25 18:38:22 -0400 |
|---|---|---|
| committer | Lyude Paul <lyude@redhat.com> | 2021-10-25 21:21:07 -0400 |
| commit | d6c6a76f80a1c91dceacef3630a7465ece630615 (patch) | |
| tree | 493d0b950d67ef0009420b59a98e75151043ec34 /drivers/gpu/drm/amd/display | |
| parent | 0332078398d0a3d99a59347c3a896896ccac2cc1 (diff) | |
| download | linux-d6c6a76f80a1c91dceacef3630a7465ece630615.tar.bz2 | |
drm: Update MST First Link Slot Information Based on Encoding Format
8b/10b encoding format requires to reserve the first slot for
recording metadata. Real data transmission starts from the second slot,
with a total of available 63 slots available.
In 128b/132b encoding format, metadata is transmitted separately
in LLCP packet before MTP. Real data transmission starts from
the first slot, with a total of 64 slots available.
v2:
* Move total/start slots to mst_state, and copy it to mst_mgr in
atomic_check
v3:
* Only keep the slot info on the mst_state
* add a start_slot parameter to the payload function, to facilitate non
atomic drivers (this is a temporary workaround and should be removed when
we are moving out the non atomic driver helpers)
v4:
*fixed typo and formatting
v5: (no functional changes)
* Fixed formatting in drm_dp_mst_update_slots()
* Reference mst_state instead of mst_state->mgr for debugging info
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
[v5 nitpicks]
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211025223825.301703-3-lyude@redhat.com
Diffstat (limited to 'drivers/gpu/drm/amd/display')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index ff0f91c93ba4..6169488e2011 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -251,7 +251,7 @@ bool dm_helpers_dp_mst_write_payload_allocation_table( } /* It's OK for this to fail */ - drm_dp_update_payload_part1(mst_mgr); + drm_dp_update_payload_part1(mst_mgr, 1); /* mst_mgr->->payloads are VC payload notify MST branch using DPCD or * AUX message. The sequence is slot 1-63 allocated sequence for each |