From: José Roberto de Souza <jose.souza@xxxxxxxxx> Commit c457d9cf256e ("drm/i915: Make sure we have enough memory bandwidth on ICL") assumes that we always have a non-zero dram_info->channels and uses it as a divisor. We need num memory channels to be at least 1 for sane bw limits checking, even when PCode returns 0, so lets force it to 1 in this case. Cc: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx> Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_bw.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c index 584ab5ce4106..c5f70f3e930e 100644 --- a/drivers/gpu/drm/i915/display/intel_bw.c +++ b/drivers/gpu/drm/i915/display/intel_bw.c @@ -175,6 +175,7 @@ static int icl_get_bw_info(struct drm_i915_private *dev_priv, const struct intel "Failed to get memory subsystem information, ignoring bandwidth limits"); return ret; } + num_channels = max_t(u8, 1, num_channels); deinterleave = DIV_ROUND_UP(num_channels, is_y_tile ? 4 : 2); dclk_max = icl_sagv_max_dclk(&qi); -- 2.26.3 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel