Re: [PATCH 00/16] drm/i915/dp: Clean up link BW/DSC slice config computation (fixes)

[Imre Deak <imre.deak@intel.com>]

Hi all,

On Tue, Dec 16, 2025 at 07:30:40PM +0200, Imre Deak wrote:
> Hi Thomas, Maarten, Maxime,
> 
> could you ack merging patch 1 and 2 in this patchset containing changes
> in drm_dp_helper.c via the Intel trees?

any objections to merge patch 1 and 2 via drm-intel? If not, could
someone ack it?

Thanks,
Imre

> They fix an issue in the i915/xe drivers' DP DSC slice-count handling
> and do not affect other drivers.
> 
> Thanks,
> Imre
> 
> On Mon, Dec 15, 2025 at 09:23:40PM +0200, Imre Deak wrote:
> > This is the first part of patchset [1] containing only the fixes for the
> > link BW and DSC slice computation. The remaining patches in [1] refactor
> > the link BW and DSC slice computation simplifying these, to be sent as a
> > follow-up to this patchset.
> > 
> > I moved patches 13-15 in [1] later in the patchset to be sent as part of
> > the follow-up, as these patches are not a dependency for the fixes in
> > this patchset.
> > 
> > [1] https://lore.kernel.org/all/20251127175023.1522538-1-imre.deak@intel.com
> > 
> > Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
> > Cc: Luca Coelho <luciano.coelho@intel.com>
> > Cc: Jouni Högander <jouni.hogander@intel.com>
> > Cc: Vinod Govindapillai <vinod.govindapillai@intel.com>
> > 
> > Imre Deak (16):
> >   drm/dp: Parse all DSC slice count caps for eDP 1.5
> >   drm/dp: Add drm_dp_dsc_sink_slice_count_mask()
> >   drm/i915/dp: Fix DSC sink's slice count capability check
> >   drm/i915/dp: Return a fixed point BPP value from intel_dp_output_bpp()
> >   drm/i915/dp: Use a mode's crtc_clock vs. clock during state
> >     computation
> >   drm/i915/dp: Factor out intel_dp_link_bw_overhead()
> >   drm/i915/dp: Fix BW check in is_bw_sufficient_for_dsc_config()
> >   drm/i915/dp: Use the effective data rate for DP BW calculation
> >   drm/i915/dp: Use the effective data rate for DP compressed BW
> >     calculation
> >   drm/i915/dp: Account with MST, SSC BW overhead for uncompressed DP-MST
> >     stream BW
> >   drm/i915/dp: Account with DSC BW overhead for compressed DP-SST stream
> >     BW
> >   drm/i915/dp: Account with pipe joiner max compressed BPP limit for
> >     DP-MST and eDP
> >   drm/i915/dp: Fail state computation for invalid min/max link BPP
> >     values
> >   drm/i915/dp: Fail state computation for invalid max throughput BPP
> >     value
> >   drm/i915/dp: Fail state computation for invalid max sink compressed
> >     BPP value
> >   drm/i915/dp: Fail state computation for invalid DSC source input BPP
> >     values
> > 
> >  drivers/gpu/drm/display/drm_dp_helper.c       | 103 ++++++---
> >  drivers/gpu/drm/i915/display/intel_dp.c       | 211 ++++++++++++------
> >  drivers/gpu/drm/i915/display/intel_dp.h       |   9 +-
> >  .../drm/i915/display/intel_dp_link_training.c |   4 +-
> >  drivers/gpu/drm/i915/display/intel_dp_mst.c   |  33 ++-
> >  include/drm/display/drm_dp_helper.h           |   3 +
> >  6 files changed, 234 insertions(+), 129 deletions(-)
> > 
> > -- 
> > 2.49.1
> >