[Intel-gfx] [PATCH] drm/i915/mtl: Support HBR3 rate with C10 phy and eDP in MTL

[Borah, Chaitanya Kumar]

> -----Original Message-----
> From: Jani Nikula <jani.nikula at linux.intel.com>
> Sent: Monday, October 30, 2023 5:21 PM
> To: Borah, Chaitanya Kumar <chaitanya.kumar.borah at intel.com>; intel-
> gfx at lists.freedesktop.org
> Cc: Syrjala, Ville <ville.syrjala at intel.com>; stable at vger.kernel.org
> Subject: Re: [Intel-gfx] [PATCH] drm/i915/mtl: Support HBR3 rate with C10
> phy and eDP in MTL
> 
> On Wed, 18 Oct 2023, Chaitanya Kumar Borah
> <chaitanya.kumar.borah at intel.com> wrote:
> > eDP specification supports HBR3 link rate since v1.4a. Moreover,
> > C10 phy can support HBR3 link rate for both DP and eDP. Therefore, do
> > not clamp the supported rates for eDP at 6.75Gbps.
> >
> > Cc: <stable at vger.kernel.org>
> >
> > BSpec: 70073 74224
> >
> > Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah at intel.com>
> 
> For future reference, the trailers (Cc, Bspec, Signed-off-by, etc.)  all go together
> with no blank lines in between.
> 

Sure Jani, will keep in mind.

Thanks

Regards

Chaitanya

> BR,
> Jani.
> 
> > ---
> >  drivers/gpu/drm/i915/display/intel_dp.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> > b/drivers/gpu/drm/i915/display/intel_dp.c
> > index 1891c0cc187d..2c1034578984 100644
> > --- a/drivers/gpu/drm/i915/display/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> > @@ -430,7 +430,7 @@ static int mtl_max_source_rate(struct intel_dp
> *intel_dp)
> >  	enum phy phy = intel_port_to_phy(i915, dig_port->base.port);
> >
> >  	if (intel_is_c10phy(i915, phy))
> > -		return intel_dp_is_edp(intel_dp) ? 675000 : 810000;
> > +		return 810000;
> >
> >  	return 2000000;
> >  }
> 
> --
> Jani Nikula, Intel