linux-kernel - Re: [Intel-gfx] [PATCH] drm/i915: Return correct EDP voltage swing table for 0.85V

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Message-ID: <20170717211713.GA6173@intel.com>
Date:   Mon, 17 Jul 2017 14:17:13 -0700
From:   Manasi Navare <manasi.d.navare@...el.com>
To:     "Pandiyan, Dhinakaran" <dhinakaran.pandiyan@...el.com>
Cc:     "mka@...omium.org" <mka@...omium.org>,
        "grundler@...omium.org" <grundler@...omium.org>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "Vivi, Rodrigo" <rodrigo.vivi@...el.com>,
        "Vetter, Daniel" <daniel.vetter@...el.com>
Subject: Re: [Intel-gfx] [PATCH] drm/i915: Return correct EDP voltage swing
 table for 0.85V

On Mon, Jul 17, 2017 at 08:59:18PM +0000, Pandiyan, Dhinakaran wrote:
> 
> 
> 
> On Mon, 2017-07-17 at 18:55 +0000, Pandiyan, Dhinakaran wrote:
> > Looks like a typo in 
> > 
> > cf54ca8 ("drm/i915/cnl: Implement voltage swing sequence.")
> > 
> > but Cc'ing Rodrigo, Clint to make sure this wasn't a workaround.
> > 
> > -DK
> 
> Checked with Clint, this wasn't a workaround, a typo indeed.
> 
>

Yup, Like I mentioned in the previous reply, I am positive that this should
return cnl_ddi_translations_edp_0_85 since I had discussed this with Rodrigo
while working on ddi buffer initialization.

Matthias, please go ahead and add the Fixes Tag like I mentioned in my previous
message. Thanks for catching this.

Manasi

> 
> > On Mon, 2017-07-17 at 11:21 -0700, Matthias Kaehlcke wrote:
> > > For 0.85V cnl_get_buf_trans_edp() returns the DP table, instead of EDP.
> > > Use the correct table.
> > > 
> > > The error was pointed out by this clang warning:
> > > 
> > > drivers/gpu/drm/i915/intel_ddi.c:392:39: warning: variable
> > >   'cnl_ddi_translations_edp_0_85V' is not needed and will not be emitted
> > >   [-Wunneeded-internal-declaration]
> > >     static const struct cnl_ddi_buf_trans cnl_ddi_translations_edp_0_85V[] = {
> > > 
> > > Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
> > > ---
> > >  drivers/gpu/drm/i915/intel_ddi.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> > > index efb13582dc73..6fa02e6a7a9b 100644
> > > --- a/drivers/gpu/drm/i915/intel_ddi.c
> > > +++ b/drivers/gpu/drm/i915/intel_ddi.c
> > > @@ -1873,7 +1873,7 @@ cnl_get_buf_trans_edp(struct drm_i915_private *dev_priv,
> > >  	if (dev_priv->vbt.edp.low_vswing) {
> > >  		if (voltage == VOLTAGE_INFO_0_85V) {
> > >  			*n_entries = ARRAY_SIZE(cnl_ddi_translations_edp_0_85V);
> > > -			return cnl_ddi_translations_dp_0_85V;
> > > +			return cnl_ddi_translations_edp_0_85V;
> > >  		} else if (voltage == VOLTAGE_INFO_0_95V) {
> > >  			*n_entries = ARRAY_SIZE(cnl_ddi_translations_edp_0_95V);
> > >  			return cnl_ddi_translations_edp_0_95V;
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@...ts.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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