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drm/nouveau/kms: Use new drm_dp_read_mst_cap() helper for checking MST caps

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Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200826182456.322681-11-lyude@redhat.com
This commit is contained in:
Lyude Paul 2020-08-26 14:24:46 -04:00
parent 4b4659128e
commit 8b75e83e9c
1 changed files with 3 additions and 13 deletions
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16
drivers/gpu/drm/nouveau/nouveau_dp.c
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@ -44,7 +44,6 @@ nouveau_dp_probe_dpcd(struct nouveau_connector *nv_connector,
struct nv50_mstm *mstm = NULL;
int ret;
u8 *dpcd = outp->dp.dpcd;
u8 tmp;
ret = drm_dp_dpcd_read(aux, DP_DPCD_REV, dpcd, DP_RECEIVER_CAP_SIZE);
if (ret == DP_RECEIVER_CAP_SIZE && dpcd[DP_DPCD_REV]) {
@ -56,19 +55,10 @@ nouveau_dp_probe_dpcd(struct nouveau_connector *nv_connector,
return connector_status_disconnected;
}
if (nouveau_mst)
if (nouveau_mst) {
mstm = outp->dp.mstm;
if (mstm) {
if (dpcd[DP_DPCD_REV] >= DP_DPCD_REV_12) {
ret = drm_dp_dpcd_readb(aux, DP_MSTM_CAP, &tmp);
if (ret < 0)
return connector_status_disconnected;
mstm->can_mst = !!(tmp & DP_MST_CAP);
} else {
mstm->can_mst = false;
}
if (mstm)
mstm->can_mst = drm_dp_read_mst_cap(aux, dpcd);
}
return connector_status_connected;