drm/i915/chv: Reset data lanes in encoder .post_disable() hook
Seems like we shouldn't leave the data lane resert deasserted when
the port if disabled. So propagate the reset the data lanes in
the encoder .post_disable() hook.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index da1d0df..7235ffb 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1865,6 +1865,30 @@
intel_dp_link_down(intel_dp);
}
+static void chv_post_disable_dp(struct intel_encoder *encoder)
+{
+ struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
+ struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
+ struct drm_device *dev = encoder->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_crtc *intel_crtc =
+ to_intel_crtc(encoder->base.crtc);
+ enum dpio_channel ch = vlv_dport_to_channel(dport);
+ enum pipe pipe = intel_crtc->pipe;
+ u32 val;
+
+ intel_dp_link_down(intel_dp);
+
+ mutex_lock(&dev_priv->dpio_lock);
+
+ /* Propagate soft reset to data lane reset */
+ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW0(ch));
+ val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
+ vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(ch), val);
+
+ mutex_unlock(&dev_priv->dpio_lock);
+}
+
static void intel_enable_dp(struct intel_encoder *encoder)
{
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
@@ -4243,6 +4267,7 @@
if (IS_CHERRYVIEW(dev)) {
intel_encoder->pre_enable = chv_pre_enable_dp;
intel_encoder->enable = vlv_enable_dp;
+ intel_encoder->post_disable = chv_post_disable_dp;
} else if (IS_VALLEYVIEW(dev)) {
intel_encoder->pre_pll_enable = vlv_dp_pre_pll_enable;
intel_encoder->pre_enable = vlv_pre_enable_dp;