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drm/nouveau/dp: Use the generic helper to control LTTPR transparent mode

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LTTPRs operating modes are defined by the DisplayPort standard and the
generic framework now provides a helper to switch between them, which
is handling the explicit disabling of non-transparent mode and its
disable->enable sequence mentioned in the DP Standard v2.0 section
3.6.6.1.

So use the new drm generic helper instead as it makes the code a bit
cleaner.

Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Danilo Krummrich <dakr@kernel.org> # via IRC
Link: https://patchwork.freedesktop.org/patch/msgid/20250203-drm-dp-msm-add-lttpr-transparent-mode-set-v5-2-c865d0e56d6e@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Abel Vesa 2025-02-03 12:57:57 +02:00 committed by Dmitry Baryshkov
parent 5e7715478c
commit 226a0baf90
1 changed files with 2 additions and 15 deletions
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17
drivers/gpu/drm/nouveau/nouveau_dp.c
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@ -79,21 +79,8 @@ nouveau_dp_probe_dpcd(struct nouveau_connector *nv_connector,
!drm_dp_read_lttpr_common_caps(aux, dpcd, outp->dp.lttpr.caps)) {
int nr = drm_dp_lttpr_count(outp->dp.lttpr.caps);
if (nr) {
drm_dp_dpcd_writeb(aux, DP_PHY_REPEATER_MODE,
DP_PHY_REPEATER_MODE_TRANSPARENT);
if (nr > 0) {
ret = drm_dp_dpcd_writeb(aux, DP_PHY_REPEATER_MODE,
DP_PHY_REPEATER_MODE_NON_TRANSPARENT);
if (ret != 1) {
drm_dp_dpcd_writeb(aux, DP_PHY_REPEATER_MODE,
DP_PHY_REPEATER_MODE_TRANSPARENT);
} else {
outp->dp.lttpr.nr = nr;
}
}
}
if (!drm_dp_lttpr_init(aux, nr))
outp->dp.lttpr.nr = nr;
}
ret = drm_dp_read_dpcd_caps(aux, dpcd);