Revert "drm/i915: Track active streams also for DP SST"

This reverts commit f64425a82bdb5c3d7e09ba765716da88a9b00eec.

active_streams will get totally out of whack with SST unless we
sync up with the hw state at readout, obviously! We don't yet
do that, so now the WARNs fire all the time. Let's revert :(

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470413142-26402-1-git-send-email-ville.syrjala@linux.intel.com
References: https://bugs.freedesktop.org/show_bug.cgi?id=95472#c14
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>

4 files changed, 10 insertions, 26 deletions

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index b8f729a176ff..c2df4e429b19 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1641,9 +1641,6 @@ static void intel_ddi_pre_enable(struct intel_encoder *intel_encoder)
 
                 intel_ddi_init_dp_buf_reg(intel_encoder);
 
-                WARN_ON(intel_dp->active_streams != 0);
-                intel_dp->active_streams++;
-
                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
                 intel_dp_start_link_train(intel_dp);
                 if (port != PORT_A || INTEL_INFO(dev_priv)->gen >= 9)
@@ -1770,13 +1767,6 @@ static void intel_disable_ddi(struct intel_encoder *intel_encoder)
                 intel_psr_disable(intel_dp);
                 intel_edp_backlight_off(intel_dp);
         }
-
-        if (type == INTEL_OUTPUT_DP || type == INTEL_OUTPUT_EDP) {
-                struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-
-                intel_dp->active_streams--;
-                WARN_ON(intel_dp->active_streams != 0);
-        }
 }
 
 bool bxt_ddi_phy_is_enabled(struct drm_i915_private *dev_priv,
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 0aadc65ff035..8fe2afa5439e 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2685,9 +2685,6 @@ static void intel_enable_dp(struct intel_encoder *encoder)
                                     lane_mask);
         }
 
-        WARN_ON(intel_dp->active_streams != 0);
-        intel_dp->active_streams++;
-
         intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
         intel_dp_start_link_train(intel_dp);
         intel_dp_stop_link_train(intel_dp);
@@ -3347,9 +3344,6 @@ intel_dp_link_down(struct intel_dp *intel_dp)
 
         DRM_DEBUG_KMS("\n");
 
-        intel_dp->active_streams--;
-        WARN_ON(intel_dp->active_streams != 0);
-
         if ((IS_GEN7(dev) && port == PORT_A) ||
             (HAS_PCH_CPT(dev) && port != PORT_A)) {
                 DP &= ~DP_LINK_TRAIN_MASK_CPT;
@@ -3851,7 +3845,7 @@ go_again:
                 if (bret == true) {
 
                         /* check link status - esi[10] = 0x200c */
-                        if (intel_dp->active_streams &&
+                        if (intel_dp->active_mst_links &&
                             !drm_dp_channel_eq_ok(&esi[10], intel_dp->lane_count)) {
                                 DRM_DEBUG_KMS("channel EQ not ok, retraining\n");
                                 intel_dp_start_link_train(intel_dp);
diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index 0beca9197a1f..629337dbca3d 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -99,7 +99,7 @@ static void intel_mst_disable_dp(struct intel_encoder *encoder)
         struct intel_dp *intel_dp = &intel_dig_port->dp;
         int ret;
 
-        DRM_DEBUG_KMS("%d\n", intel_dp->active_streams);
+        DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 
         drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->connector->port);
 
@@ -115,7 +115,7 @@ static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
         struct intel_digital_port *intel_dig_port = intel_mst->primary;
         struct intel_dp *intel_dp = &intel_dig_port->dp;
 
-        DRM_DEBUG_KMS("%d\n", intel_dp->active_streams);
+        DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 
         /* this can fail */
         drm_dp_check_act_status(&intel_dp->mst_mgr);
@@ -124,10 +124,10 @@ static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
 
         drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->connector->port);
 
-        intel_dp->active_streams--;
+        intel_dp->active_mst_links--;
 
         intel_mst->connector = NULL;
-        if (intel_dp->active_streams == 0) {
+        if (intel_dp->active_mst_links == 0) {
                 intel_dig_port->base.post_disable(&intel_dig_port->base);
                 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
         }
@@ -165,11 +165,11 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
          */
         found->encoder = encoder;
 
-        DRM_DEBUG_KMS("%d\n", intel_dp->active_streams);
+        DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 
         intel_mst->connector = found;
 
-        if (intel_dp->active_streams == 0) {
+        if (intel_dp->active_mst_links == 0) {
                 intel_ddi_clk_select(&intel_dig_port->base, intel_crtc->config);
 
                 intel_prepare_dp_ddi_buffers(&intel_dig_port->base);
@@ -193,7 +193,7 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
         }
 
 
-        intel_dp->active_streams++;
+        intel_dp->active_mst_links++;
         temp = I915_READ(DP_TP_STATUS(port));
         I915_WRITE(DP_TP_STATUS(port), temp);
 
@@ -210,7 +210,7 @@ static void intel_mst_enable_dp(struct intel_encoder *encoder)
         enum port port = intel_dig_port->port;
         int ret;
 
-        DRM_DEBUG_KMS("%d\n", intel_dp->active_streams);
+        DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
 
         if (intel_wait_for_register(dev_priv,
                                     DP_TP_STATUS(port),
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index a97886632870..b1fc67ed8bc2 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -894,7 +894,7 @@ struct intel_dp {
 
         bool can_mst; /* this port supports mst */
         bool is_mst;
-        int active_streams; /* number of active streams (for SST and MST both) */
+        int active_mst_links;
         /* connector directly attached - won't be use for modeset in mst world */
         struct intel_connector *attached_connector;