[PATCH 1/4] drm/i915/dp: Add missing slice count check during mode validation

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

Add the missing check for a valid slice count during
mode validation when DSC is enabled.

Cc: Vinod Govindapillai <vinod.govindapillai@intel.com>
Fixes: 745395b51c26 ("drm/i915/dp: Add intel_dp_mode_valid_with_dsc()")
Signed-off-by: Imre Deak <imre.deak@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index b5fe7d8ba5864..d1caa20370123 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2595,6 +2595,9 @@ bool intel_dp_mode_valid_with_dsc(struct intel_connector *connector,
 	if (min_bpp_x16 <= 0 || min_bpp_x16 > max_bpp_x16)
 		return false;
 
+	if (dsc_slice_count == 0)
+		return false;
+
 	return is_bw_sufficient_for_dsc_config(intel_dp,
 					       link_clock, lane_count,
 					       mode_clock, mode_hdisplay,
-- 
2.49.1