RE: [PATCH] drm/i915/vdsc: Correct the conditions of DSC1.1 and DSC 1.2 for rc params calculation

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> -----Original Message-----
> From: Kandpal, Suraj <suraj.kandpal@xxxxxxxxx>
> Sent: Friday, February 21, 2025 12:44 PM
> To: Yu, Gareth <gareth.yu@xxxxxxxxx>; intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> Cc: intel-xe@xxxxxxxxxxxxxxxxxxxxx; Tseng, William <william.tseng@xxxxxxxxx>;
> Nautiyal, Ankit K <ankit.k.nautiyal@xxxxxxxxx>; Heikkila, Juha-pekka <juha-
> pekka.heikkila@xxxxxxxxx>
> Subject: RE: [PATCH] drm/i915/vdsc: Correct the conditions of DSC1.1 and
> DSC 1.2 for rc params calculation
> 
> 
> 
> > -----Original Message-----
> > From: Yu, Gareth <gareth.yu@xxxxxxxxx>
> > Sent: Friday, February 21, 2025 9:44 AM
> > To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > Cc: intel-xe@xxxxxxxxxxxxxxxxxxxxx; shawn.c.lee.intel.om; Tseng,
> > William <william.tseng@xxxxxxxxx>; Nautiyal, Ankit K
> > <ankit.k.nautiyal@xxxxxxxxx>; Yu, Gareth <gareth.yu@xxxxxxxxx>;
> > Kandpal, Suraj <suraj.kandpal@xxxxxxxxx>; Heikkila, Juha-pekka
> > <juha-pekka.heikkila@xxxxxxxxx>
> > Subject: [PATCH] drm/i915/vdsc: Correct the conditions of DSC1.1 and
> > DSC 1.2 for rc params calculation
> >
> > From: Gareth Yu <gareth.yu@xxxxxxxxx>
> >
> > The condition change is because Gen 14 begins to support DSC 1.2 and
> > need to check if the sink supports DSC1.2
> >
> > Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13719
> >
> > Cc: Suraj Kandpal <suraj.kandpal@xxxxxxxxx>
> > Cc: Juha-Pekka Heikkil <juha-pekka.heikkila@xxxxxxxxx>
> > Signed-off-by: Gareth Yu <gareth.yu@xxxxxxxxx>
> 
> Why has the authorship and Signed-off-by changed for essentially the same
> patch.
> Also the commit message and versioning information has been removed any
> changes Needs to go as a new version to the previous patch.
This is a new patch to check both source and sink DSC version. The previous one (https://patchwork.freedesktop.org/patch/638403/?series=145136) is only to check sink condition.
> 
> 
> > ---
> >  drivers/gpu/drm/i915/display/intel_vdsc.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c
> > b/drivers/gpu/drm/i915/display/intel_vdsc.c
> > index b355c479eda3..555180e40b72 100644
> > --- a/drivers/gpu/drm/i915/display/intel_vdsc.c
> > +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
> > @@ -320,7 +320,7 @@ int intel_dsc_compute_params(struct
> > intel_crtc_state
> > *pipe_config)
> >  	 * upto uncompressed bpp-1, hence add calculations for all the rc
> >  	 * parameters
> >  	 */
> > -	if (DISPLAY_VER(dev_priv) >= 13) {
> > +	if ((DISPLAY_VER(dev_priv) >= 14) && (vdsc_cfg->dsc_version_minor
> >=
> > +2)) {
> 
> Please add a bspec reference number in the commit message where it says
> we started support of DSC 1.2 from MTL
BSPEC: 49259. Will add in the next version.
> 
> Regards,
> Suraj Kandpal
> 
> >  		calculate_rc_params(vdsc_cfg);
> >  	} else {
> >  		if ((compressed_bpp == 8 ||
> > --
> > 2.34.1





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