Re: [PATCH] drm/i915: Bump max TMDS bitrate to 6 Gbps on ADL/DG2+

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Mon, May 20, 2024 at 01:37:26PM +0300, Jani Nikula wrote:
> On Thu, 16 May 2024, Ville Syrjala <ville.syrjala@linux.intel.com> wrote:
> > From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> >
> > Bspec lists the mas TMDS bitrate as 6 Gbps on ADL/DG2.
> 
> *max
> 
> There's also ADL-S with display 12 and 6 Gbps support?

Looks like it. Too many weird platform variants...

> 
> BR,
> Jani.
> 
> > Bump our limit to match.
> >
> > Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_hdmi.c | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
> > index 0faf2afa1c09..bd0ba4edcd1d 100644
> > --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> > +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> > @@ -1784,7 +1784,9 @@ static int intel_hdmi_source_max_tmds_clock(struct intel_encoder *encoder)
> >  	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> >  	int max_tmds_clock, vbt_max_tmds_clock;
> >  
> > -	if (DISPLAY_VER(dev_priv) >= 10)
> > +	if (DISPLAY_VER(dev_priv) >= 13)
> > +		max_tmds_clock = 600000;
> > +	else if (DISPLAY_VER(dev_priv) >= 10)
> >  		max_tmds_clock = 594000;
> >  	else if (DISPLAY_VER(dev_priv) >= 8 || IS_HASWELL(dev_priv))
> >  		max_tmds_clock = 300000;
> 
> -- 
> Jani Nikula, Intel

-- 
Ville Syrjälä
Intel