[Intel-gfx] [PATCH v2] drm/i915/icl: reverse uninit order

[Lucas De Marchi]

On Tue, Nov 13, 2018 at 10:31:25PM +0200, Jani Nikula wrote:
> On Tue, 13 Nov 2018, Lucas De Marchi <lucas.demarchi at intel.com> wrote:
> > Bspec 21257 says "DDIA PHY is the comp master, so it must
> > not be un-initialized if other combo PHYs are in use". Here
> > we are shutting down all phys, so it's not strictly required.
> > However let's be consistent on deinitializing things in the
> > reversed order we initialized them.
> >
> > v2: simplify protection for enum port being unsigned in future
> >
> > Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
> > ---
> >  drivers/gpu/drm/i915/intel_combo_phy.c | 6 +++++-
> >  1 file changed, 5 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_combo_phy.c b/drivers/gpu/drm/i915/intel_combo_phy.c
> > index 49f3a533860d..62939df048d7 100644
> > --- a/drivers/gpu/drm/i915/intel_combo_phy.c
> > +++ b/drivers/gpu/drm/i915/intel_combo_phy.c
> > @@ -9,6 +9,10 @@
> >  	for ((__port) = PORT_A; (__port) < I915_MAX_PORTS; (__port)++)	\
> >  		for_each_if(intel_port_is_combophy(__dev_priv, __port))
> >  
> > +#define for_each_combo_port_rev(__dev_priv, __port) \
> 
> The list.h list macros use _reverse suffix for reverse traversal. I
> think we can afford to spend the extra letters here too.

I followed what we do on other for_each macro:
for_each_power_well_rev
for_each_power_domain_well_rev

Should those be reverse as well?

Lucas De Marchi

> 
> BR,
> Jani.
> 
> > +	for ((__port) = I915_MAX_PORTS; (__port)-- > PORT_A;) \
> > +		for_each_if(intel_port_is_combophy(__dev_priv, __port))
> > +
> >  enum {
> >  	PROCMON_0_85V_DOT_0,
> >  	PROCMON_0_95V_DOT_0,
> > @@ -232,7 +236,7 @@ void icl_combo_phys_uninit(struct drm_i915_private *dev_priv)
> >  {
> >  	enum port port;
> >  
> > -	for_each_combo_port(dev_priv, port) {
> > +	for_each_combo_port_rev(dev_priv, port) {
> >  		u32 val;
> >  
> >  		if (!icl_combo_phy_verify_state(dev_priv, port))
> 
> -- 
> Jani Nikula, Intel Open Source Graphics Center