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drm/dp_mst: Add MST support to DP DPCD R/W functions

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Instead of having drm_dp_dpcd_read/write and
drm_dp_mst_dpcd_read/write as entry points into the
aux code, have drm_dp_dpcd_read/write handle both.

This means that DRM drivers can make MST DPCD read/writes.

v2: Fix spacing
v3: Dump dpcd access on MST read/writes
v4: Fix calling wrong function on DPCD write
v5: delete deprecated include of drmP.h

Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: David Francis <David.Francis@amd.com>
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
David Francis
2019-06-19 14:46:15 -04:00
committed by Alex Deucher
parent a3c2b0ffc0
commit 2f221a5efe
2 changed files with 22 additions and 20 deletions
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12
drivers/gpu/drm/drm_dp_aux_dev.c
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@@ -163,11 +163,7 @@ static ssize_t auxdev_read_iter(struct kiocb *iocb, struct iov_iter *to)
break;
}
if (aux_dev->aux->is_remote)
res = drm_dp_mst_dpcd_read(aux_dev->aux, pos, buf,
todo);
else
res = drm_dp_dpcd_read(aux_dev->aux, pos, buf, todo);
res = drm_dp_dpcd_read(aux_dev->aux, pos, buf, todo);
if (res <= 0)
break;
@@ -215,11 +211,7 @@ static ssize_t auxdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
break;
}
if (aux_dev->aux->is_remote)
res = drm_dp_mst_dpcd_write(aux_dev->aux, pos, buf,
todo);
else
res = drm_dp_dpcd_write(aux_dev->aux, pos, buf, todo);
res = drm_dp_dpcd_write(aux_dev->aux, pos, buf, todo);
if (res <= 0)
break;