drm/i915/dp: Fail state computation for invalid max sink compressed BPP value

There is no reason to accept an invalid maximum sink compressed BPP
value (i.e. 0), fail the state computation in this case.

Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20251215192357.172201-16-imre.deak@intel.com

Author: ideak

drivers/gpu/drm/i915/display/intel_dp.c

@@ -2623,8 +2623,7 @@ intel_dp_compute_config_link_bpp_limits(struct intel_dp *intel_dp,
 		dsc_sink_max_bpp = intel_dp_dsc_sink_max_compressed_bpp(connector,
 									crtc_state,
 									limits->pipe.max_bpp / 3);
-		dsc_max_bpp = dsc_sink_max_bpp ?
-			      min(dsc_sink_max_bpp, dsc_src_max_bpp) : dsc_src_max_bpp;
+		dsc_max_bpp = min(dsc_sink_max_bpp, dsc_src_max_bpp);
 		dsc_max_bpp = min(dsc_max_bpp, joiner_max_bpp);
 
 		max_link_bpp_x16 = min(max_link_bpp_x16, fxp_q4_from_int(dsc_max_bpp));