[Intel-gfx] [PATCH v2] drm/i915/dp: Debug log MST active links explicitly

[Pandiyan, Dhinakaran]

Jim,
Please let me know if the R-B is still good.

-DK

On Tue, 2016-10-25 at 21:37 -0700, Dhinakaran Pandiyan wrote:
> From: "Pandiyan, Dhinakaran" <dhinakaran.pandiyan at intel.com>
> 
> No functional change. Just printing the number of active links without
> stating what the number means is not very useful. So, add relevant text.
> 
> v2: Included connector info (Chris)
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> Reviewed-by: Jim Bride <jim.bride at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_dp_mst.c | 19 ++++++++++---------
>  1 file changed, 10 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
> index 3ffbd69..8f2016b 100644
> --- a/drivers/gpu/drm/i915/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/intel_dp_mst.c
> @@ -86,8 +86,6 @@ static void intel_mst_disable_dp(struct intel_encoder *encoder,
>  		to_intel_connector(old_conn_state->connector);
>  	int ret;
>  
> -	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
> -
>  	drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
>  
>  	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
> @@ -106,8 +104,6 @@ static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
>  	struct intel_connector *connector =
>  		to_intel_connector(old_conn_state->connector);
>  
> -	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
> -
>  	/* this can fail */
>  	drm_dp_check_act_status(&intel_dp->mst_mgr);
>  	/* and this can also fail */
> @@ -124,6 +120,11 @@ static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
>  
>  		intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
>  	}
> +
> +	DRM_DEBUG_KMS("[CONNECTOR:%d:%s] MST link deactivated, total active links: %d\n",
> +		      old_conn_state->connector->base.id,
> +		      old_conn_state->connector->name,
> +		      intel_dp->active_mst_links);
>  }
>  
>  static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
> @@ -147,8 +148,6 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
>  	connector->encoder = encoder;
>  	intel_mst->connector = connector;
>  
> -	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
> -
>  	if (intel_dp->active_mst_links == 0) {
>  		intel_ddi_clk_select(&intel_dig_port->base,
>  				     pipe_config->shared_dpll);
> @@ -175,7 +174,6 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
>  		return;
>  	}
>  
> -
>  	intel_dp->active_mst_links++;
>  	temp = I915_READ(DP_TP_STATUS(port));
>  	I915_WRITE(DP_TP_STATUS(port), temp);
> @@ -194,8 +192,6 @@ 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_mst_links);
> -
>  	if (intel_wait_for_register(dev_priv,
>  				    DP_TP_STATUS(port),
>  				    DP_TP_STATUS_ACT_SENT,
> @@ -206,6 +202,11 @@ static void intel_mst_enable_dp(struct intel_encoder *encoder,
>  	ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
>  
>  	ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
> +
> +	DRM_DEBUG_KMS("[CONNECTOR:%d:%s] MST link activated, total active links: %d\n",
> +		      conn_state->connector->base.id,
> +		      conn_state->connector->name,
> +		      intel_dp->active_mst_links);
>  }
>  
>  static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,