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drm/i915/mst: Disable transcoder before deleting the payload 

Bspec tells us that we should disable the transcoder before
deleting the payload. Looks like this has been reversed since
MST support was added.

I suppose this shouldn't matter in practice since the downstream
device shouldn't really do anything with the new payload until
we send the ACT. But I see no compelling reason to deviate from
the bspec sequence regardless.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231018154123.5479-3-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
pull/477/merge
Ville Syrjälä 2023-10-18 18:41:21 +03:00
parent d1727cdd45
commit d068fa5373
1 changed files with 2 additions and 6 deletions
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8
drivers/gpu/drm/i915/display/intel_dp_mst.c
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@ -587,10 +587,6 @@ static void intel_mst_disable_dp(struct intel_atomic_state *state,
struct intel_dp *intel_dp = &dig_port->dp;
struct intel_connector *connector =
to_intel_connector(old_conn_state->connector);
struct drm_dp_mst_topology_state *new_mst_state =
drm_atomic_get_new_mst_topology_state(&state->base, &intel_dp->mst_mgr);
struct drm_dp_mst_atomic_payload *new_payload =
drm_atomic_get_mst_payload_state(new_mst_state, connector->port);
struct drm_i915_private *i915 = to_i915(connector->base.dev);
drm_dbg_kms(&i915->drm, "active links %d\n",
@ -598,8 +594,6 @@ static void intel_mst_disable_dp(struct intel_atomic_state *state,
intel_hdcp_disable(intel_mst->connector);
drm_dp_remove_payload_part1(&intel_dp->mst_mgr, new_mst_state, new_payload);
intel_audio_codec_disable(encoder, old_crtc_state, old_conn_state);
}
@ -634,6 +628,8 @@ static void intel_mst_post_disable_dp(struct intel_atomic_state *state,
intel_disable_transcoder(old_crtc_state);
drm_dp_remove_payload_part1(&intel_dp->mst_mgr, new_mst_state, new_payload);
clear_act_sent(encoder, old_crtc_state);
intel_de_rmw(dev_priv, TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder),