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drm/nouveau/kms: Start using drm_dp_read_dpcd_caps() 

Now that we've extracted i915's code for reading both the normal DPCD
caps and extended DPCD caps into a shared helper, let's start using this
in nouveau to enable us to start checking extended DPCD caps for free.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200826182456.322681-21-lyude@redhat.com
This commit is contained in:
Lyude Paul 2020-08-26 14:24:56 -04:00
parent b9936121d9
commit 79416e97dd
1 changed files with 6 additions and 8 deletions
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14
drivers/gpu/drm/nouveau/nouveau_dp.c
View File

@ -54,15 +54,13 @@ nouveau_dp_probe_dpcd(struct nouveau_connector *nv_connector,
int ret;
u8 *dpcd = outp->dp.dpcd;
ret = drm_dp_dpcd_read(aux, DP_DPCD_REV, dpcd, DP_RECEIVER_CAP_SIZE);
if (ret == DP_RECEIVER_CAP_SIZE && dpcd[DP_DPCD_REV]) {
ret = drm_dp_read_desc(aux, &outp->dp.desc,
drm_dp_is_branch(dpcd));
if (ret < 0)
goto out;
} else {
ret = drm_dp_read_dpcd_caps(aux, dpcd);
if (ret < 0)
goto out;
ret = drm_dp_read_desc(aux, &outp->dp.desc, drm_dp_is_branch(dpcd));
if (ret < 0)
goto out;
}
if (nouveau_mst) {
mstm = outp->dp.mstm;