[Intel-gfx] [PATCH 08/23] drm/i915: Unify the TypeC port notation in debug/error messages

[Imre Deak]

On Fri, Jun 07, 2019 at 11:42:31PM +0300, Imre Deak wrote:
> On Fri, Jun 07, 2019 at 11:21:51PM +0300, Souza, Jose wrote:
> > On Tue, 2019-06-04 at 17:58 +0300, Imre Deak wrote:
> > > Unify the TypeC port notation in log messages, so that it matches the
> > > spec. For instance the first ICL TypeC port will read as 'Port
> > > C/TC#1'.
> > > 
> > > Cc: José Roberto de Souza <jose.souza at intel.com>
> > > Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > > Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
> > > Signed-off-by: Imre Deak <imre.deak at intel.com>
> > > ---
> > >  drivers/gpu/drm/i915/intel_tc.c | 41 +++++++++++++++++++++++++++--
> > > ----
> > >  1 file changed, 34 insertions(+), 7 deletions(-)
> > > 
> > > diff --git a/drivers/gpu/drm/i915/intel_tc.c
> > > b/drivers/gpu/drm/i915/intel_tc.c
> > > index a3057c44bec6..07488235b67a 100644
> > > --- a/drivers/gpu/drm/i915/intel_tc.c
> > > +++ b/drivers/gpu/drm/i915/intel_tc.c
> > > @@ -6,6 +6,29 @@
> > >  #include "i915_drv.h"
> > >  #include "intel_tc.h"
> > >  
> > > +static enum port intel_tc_port_to_port(struct drm_i915_private
> > > *dev_priv,
> > > +				       enum tc_port tc_port)
> > > +{
> > > +	return tc_port + PORT_C;
> > > +}
> > > +
> > > +static const char *tc_port_name(struct drm_i915_private *dev_priv,
> > > +				enum tc_port tc_port)
> > > +{
> > > +	static char port_names[I915_MAX_TC_PORTS][8];
> > > +
> > > +	if (WARN_ON(INTEL_GEN(dev_priv) < 11 ||
> > > +	    (unsigned int)tc_port >= I915_MAX_TC_PORTS))
> > > +		tc_port = PORT_TC1;
> > 
> > Why no WARN_ON on the tc_port >= I915_MAX_TC_PORTS?
> 
> Hm, do you mean a seaparate WARN_ON()?

Well, at least it's misindented, I can fix that.

> 
> > 
> > > +
> > > +	snprintf(&port_names[tc_port][0], sizeof(port_names[tc_port]),
> > > +		 "%c/TC#%d",
> > > +		 port_name(intel_tc_port_to_port(dev_priv, tc_port)),
> > > +		 tc_port + 1);
> > 
> > Maybe do it only once for each port?
> > 
> > if (port_names[tc_port][0])
> > 	return port_names[tc_port];
> 
> I thought why not keep it as simple as possible (not really performance
> critical), but your version makes it clearer to the reader what the
> logic is (static array), so can change it.
> 
> > 
> > snprintf(&port_names[tc_port], sizeof....
> > 
> > Other the above:
> > 
> > Reviewed-by: José Roberto de Souza <jose.souza at intel.com>
> > 
> > > +
> > > +	return port_names[tc_port];
> > > +}
> > > +
> > >  static const char *tc_port_mode_name(enum tc_port_mode mode)
> > >  {
> > >  	static const char * const names[] = {
> > > @@ -85,7 +108,8 @@ static bool icl_tc_phy_connect(struct
> > > intel_digital_port *dig_port)
> > >  
> > >  	val = I915_READ(PORT_TX_DFLEXDPPMS);
> > >  	if (!(val & DP_PHY_MODE_STATUS_COMPLETED(tc_port))) {
> > > -		DRM_DEBUG_KMS("DP PHY for TC port %d not ready\n",
> > > tc_port);
> > > +		DRM_DEBUG_KMS("Port %s: PHY not ready\n",
> > > +			      tc_port_name(dev_priv, tc_port));
> > >  		WARN_ON(dig_port->tc_legacy_port);
> > >  		return false;
> > >  	}
> > > @@ -106,7 +130,8 @@ static bool icl_tc_phy_connect(struct
> > > intel_digital_port *dig_port)
> > >  	 */
> > >  	if (dig_port->tc_mode == TC_PORT_DP_ALT &&
> > >  	    !(I915_READ(PORT_TX_DFLEXDPSP) &
> > > TC_LIVE_STATE_TC(tc_port))) {
> > > -		DRM_DEBUG_KMS("TC PHY %d sudden disconnect.\n",
> > > tc_port);
> > > +		DRM_DEBUG_KMS("Port %s: PHY sudden disconnect\n",
> > > +			      tc_port_name(dev_priv, tc_port));
> > >  		icl_tc_phy_disconnect(dig_port);
> > >  		return false;
> > >  	}
> > > @@ -136,8 +161,8 @@ void icl_tc_phy_disconnect(struct
> > > intel_digital_port *dig_port)
> > >  		I915_WRITE(PORT_TX_DFLEXDPCSSS, val);
> > >  	}
> > >  
> > > -	DRM_DEBUG_KMS("Port %c TC type %s disconnected\n",
> > > -		      port_name(dig_port->base.port),
> > > +	DRM_DEBUG_KMS("Port %s: mode %s disconnected\n",
> > > +		      tc_port_name(dev_priv, tc_port),
> > >  		      tc_port_mode_name(dig_port->tc_mode));
> > >  
> > >  	dig_port->tc_mode = TC_PORT_TBT_ALT;
> > > @@ -162,7 +187,9 @@ static void icl_update_tc_port_type(struct
> > > drm_i915_private *dev_priv,
> > >  		return;
> > >  
> > >  	if (old_mode != intel_dig_port->tc_mode)
> > > -		DRM_DEBUG_KMS("Port %c has TC type %s\n",
> > > port_name(port),
> > > +		DRM_DEBUG_KMS("Port %s: port has mode %s\n",
> > > +			      tc_port_name(dev_priv,
> > > +					   intel_port_to_tc(dev_priv,
> > > port)),
> > >  			      tc_port_mode_name(intel_dig_port-
> > > >tc_mode));
> > >  }
> > >  
> > > @@ -191,8 +218,8 @@ bool intel_tc_port_connected(struct
> > > intel_digital_port *dig_port)
> > >  	 */
> > >  	if (!dig_port->tc_legacy_port &&
> > >  	    I915_READ(SDEISR) & SDE_TC_HOTPLUG_ICP(tc_port)) {
> > > -		DRM_ERROR("VBT incorrectly claims port %c is not TypeC
> > > legacy\n",
> > > -			  port_name(port));
> > > +		DRM_ERROR("Port %s: VBT incorrectly claims port is not
> > > TypeC legacy\n",
> > > +			  tc_port_name(dev_priv, tc_port));
> > >  		dig_port->tc_legacy_port = true;
> > >  	}
> > >  	is_legacy = dig_port->tc_legacy_port;
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