[PATCH 3/5] drm/i915/psr: Increase psr size limits for Xe2

[Kandpal, Suraj]

> -----Original Message-----
> From: Roper, Matthew D <matthew.d.roper at intel.com>
> Sent: Saturday, October 26, 2024 3:31 AM
> To: Kandpal, Suraj <suraj.kandpal at intel.com>
> Cc: intel-xe at lists.freedesktop.org; intel-gfx at lists.freedesktop.org; Nautiyal,
> Ankit K <ankit.k.nautiyal at intel.com>
> Subject: Re: [PATCH 3/5] drm/i915/psr: Increase psr size limits for Xe2
> 
> On Fri, Oct 25, 2024 at 11:31:34AM +0530, Suraj Kandpal wrote:
> > Increase the psr max_h limit to 4096.
> 
> Commit message doesn't match code (this should probably say max_v
> instead of max_h).
> 
> Since PSR2 size is supported up to the maximum pipe size now (for both
> Xe2 and Xe3) would it be simpler to just make the check on psr_max_{h,v}
> conditional to pre-Xe2?  Then if we don't have any truly PSR-specific limits, we
> don't need to keep duplicating the pipe limits in two places going forward.

Also the reason we may continue to need the ladder of checks here is that when we check
The limits in intel_display we check it considering the num of joined pipes which not only changes width
But also the height to 4320 instead of 4096 which means we need to get these limits separately checked here
As well

Regards,
Suraj Kandpal
> 
> 
> Matt
> 
> >
> > Bspec: 69885, 68858
> > Signed-off-by: Suraj Kandpal <suraj.kandpal at intel.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_psr.c | 6 +++++-
> >  1 file changed, 5 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> > b/drivers/gpu/drm/i915/display/intel_psr.c
> > index 4176163ec19a..c22386a31a63 100644
> > --- a/drivers/gpu/drm/i915/display/intel_psr.c
> > +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> > @@ -1453,7 +1453,11 @@ static bool intel_psr2_config_valid(struct
> intel_dp *intel_dp,
> >  		return false;
> >  	}
> >
> > -	if (DISPLAY_VER(display) >= 12) {
> > +	if (DISPLAY_VER(display) >= 20) {
> > +		psr_max_h = 5120;
> > +		psr_max_v = 4096;
> > +		max_bpp = 30;
> > +	} else if (DISPLAY_VER(display) >= 12) {
> >  		psr_max_h = 5120;
> >  		psr_max_v = 3200;
> >  		max_bpp = 30;
> > --
> > 2.34.1
> >
> 
> --
> Matt Roper
> Graphics Software Engineer
> Linux GPU Platform Enablement
> Intel Corporation