[PATCH v2 2/2] drm/i915/dp: Verify valid pipe BPP range

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

Ensure that the pipe BPP range is valid after calculating the minimum
and maximum pipe BPP values separately.

Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 7fd20df10f26f..48845899298e4 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2745,6 +2745,15 @@ intel_dp_compute_config_limits(struct intel_dp *intel_dp,
 								     crtc_state)));
 	}
 
+	if (limits->pipe.min_bpp <= 0 ||
+	    limits->pipe.min_bpp > limits->pipe.max_bpp) {
+		drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s] Invalid pipe bpp range: %d-%d\n",
+			    connector->base.base.id, connector->base.name,
+			    limits->pipe.min_bpp, limits->pipe.max_bpp);
+
+		return false;
+	}
+
 	if (dsc && !intel_dp_dsc_compute_pipe_bpp_limits(connector, limits))
 		return false;
 
-- 
2.49.1