[Intel-gfx] [PATCH 4/5] drm/i915: Corrected the platform checks in i915_ring_freq_table function

[Akash Goel]

On Mon, 2015-06-15 at 15:15 +0200, Daniel Vetter wrote:
> On Sun, Jun 07, 2015 at 06:32:23PM +0530, akash.goel at intel.com wrote:
> > From: Akash Goel <akash.goel at intel.com>
> > 
> > Corrected the platform checks in i915_ring_freq_table debugfs function
> > so as to allow the read of ring frequency table for BDW and disallow for VLV
> > 
> > Issue: VIZ-5144
> > Signed-off-by: Akash Goel <akash.goel at intel.com>
> > ---
> >  drivers/gpu/drm/i915/i915_debugfs.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> > index 47636f3..1c83596 100644
> > --- a/drivers/gpu/drm/i915/i915_debugfs.c
> > +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> > @@ -1779,7 +1779,8 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused)
> >  	int ret = 0;
> >  	int gpu_freq, ia_freq;
> >  
> > -	if (!(IS_GEN6(dev) || IS_GEN7(dev))) {
> > +	if (!(IS_GEN6(dev) || (IS_GEN7(dev) && !IS_VALLEYVIEW(dev)) ||
> > +	      IS_BROADWELL(dev))) {
> 
> This is really hard to read with the double negation. What about
> 
> 	if (gen < 6 || IS_VLV(dev))
> 		/* not supported */
> 
> instaed? Presuming I decoded this correctly ...

Yes this way also it is fine. Will make this change.

Accordingly the next patch will also change, like this
	if (gen < 6 || IS_VLV(dev) || IS_BROXTON(dev))
		/* not supported */

Best regards
Akash

> -Daniel
> >  		seq_puts(m, "unsupported on this chipset\n");
> >  		return 0;
> >  	}
> > -- 
> > 1.9.2
> > 
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>