On Fri, Jan 31, 2025 at 01:10:25AM -0500, Borah, Chaitanya Kumar wrote: > > > > -----Original Message----- > > From: Intel-xe <intel-xe-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Ankit > > Nautiyal > > Sent: Friday, January 31, 2025 9:44 AM > > To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; intel-xe@xxxxxxxxxxxxxxxxxxxxx > > Cc: jani.nikula@xxxxxxxxxxxxxxx; Kandpal, Suraj <suraj.kandpal@xxxxxxxxx>; > > Vivi, Rodrigo <rodrigo.vivi@xxxxxxxxx>; david.laight.linux@xxxxxxxxx; > > naresh.kamboju@xxxxxxxxxx > > Subject: [PATCH] drm/i915/dp: Return min bpc supported by source instead > > of 0 > > > > Currently, intel_dp_dsc_max_src_input_bpc can return 0 for platforms not > > supporting DSC, which could theoretically cause issues in clamp() due to a > > low limit being greater than the high limit. > > > > Instead, return the minimum bpc supported by the source to prevent such > > issues. > > > > Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx> > > Closes: > > https://lore.kernel.org/all/CA+G9fYtNfM399_=_ff81zeRJv=0+z7oFJfPGmJgTp6y > > rJmU+1w@xxxxxxxxxxxxxx/ > > Fixes: 160672b86b0d ("drm/i915/dp: Use clamp for pipe_bpp limits with > > DSC") > > Cc: Suraj Kandpal <suraj.kandpal@xxxxxxxxx> > > Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> > > Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> > > Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx> > > Solves the build issue for linux-next. > > Tested-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@xxxxxxxxx> pushed to drm-intel-next. Thank you all > > > > > --- > > 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 80214a559013..d28abf081844 100644 > > --- a/drivers/gpu/drm/i915/display/intel_dp.c > > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > > @@ -1791,7 +1791,7 @@ int intel_dp_dsc_max_src_input_bpc(struct > > intel_display *display) > > if (DISPLAY_VER(display) == 11) > > return 10; > > > > - return 0; > > + return intel_dp_dsc_min_src_input_bpc(); > > } > > > > int intel_dp_dsc_compute_max_bpp(const struct intel_connector *connector, > > -- > > 2.45.2 >
