[PATCH v5 10/20] drm/nouveau/kms: Use new drm_dp_read_mst_cap() helper for checking MST caps

Lyude Paul
2020-08-26T18:26:19Z

drivers/gpu/drm/nouveau/nouveau_dp.c | 16 +++-------------
1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c
index 032afc73e2a33..a5934064a75ea 100644
--- a/drivers/gpu/drm/nouveau/nouveau_dp.c
+++ b/drivers/gpu/drm/nouveau/nouveau_dp.c
@@ -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;
--
2.26.2