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

[Pandiyan, Dhinakaran]

On Wed, 2016-10-19 at 08:47 +0100, Chris Wilson wrote:
> On Tue, Oct 18, 2016 at 05:18:48PM -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.
> 
> If you are going to add information, consider also noting which
> connector/encoder you are talking about. Even before we get concurrent
> handling of multiple channels, this is useful!
> -Chris

Yeah, connector and encoder info must be included. But, now I think of
it, printing active links twice while enabling and twice while disabling
is excessive. The value we print in post_disable() is not intuitive too.

-DK 

> > 
> > Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> > Reviewed-by: Jim Bride <jim.bride at linux.intel.com>
> > ---
> > No changes, sending with Jim's R-B
> > 
> >  drivers/gpu/drm/i915/intel_dp_mst.c | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
> > index 3ffbd69..62a69b5 100644
> > --- a/drivers/gpu/drm/i915/intel_dp_mst.c
> > +++ b/drivers/gpu/drm/i915/intel_dp_mst.c
> > @@ -86,7 +86,7 @@ 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_DEBUG_KMS("active MST links: %d\n", intel_dp->active_mst_links);
> >  
> >  	drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
> >  
> > @@ -106,7 +106,7 @@ 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);
> > +	DRM_DEBUG_KMS("active MST links: %d\n", intel_dp->active_mst_links);
> >  
> >  	/* this can fail */
> >  	drm_dp_check_act_status(&intel_dp->mst_mgr);
> > @@ -147,7 +147,7 @@ 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);
> > +	DRM_DEBUG_KMS("active MST links: %d\n", intel_dp->active_mst_links);
> >  
> >  	if (intel_dp->active_mst_links == 0) {
> >  		intel_ddi_clk_select(&intel_dig_port->base,
> > @@ -194,7 +194,7 @@ 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_mst_links);
> > +	DRM_DEBUG_KMS("active MST links: %d\n", intel_dp->active_mst_links);
> >  
> >  	if (intel_wait_for_register(dev_priv,
> >  				    DP_TP_STATUS(port),
> > -- 
> > 2.7.4
> > 
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