[PATCH 12/14] drm/i915/dp: Use clamp for pipe_bpp limits with DSC

[Ankit Nautiyal]

Currently to get the max pipe_bpp with dsc we take the min of
limits->pipe.max_bpp and dsc max bpp (dsc max bpc * 3). This can result
in problems when limits->pipe.max_bpp is less than the computed dsc min bpp
(dsc min bpc * 3).

Replace the min/max functions with clamp while computing
limits->pipe.max/min_bpp to ensure that the pipe_bpp limits are constrained
within the DSC-defined minimum and maximum values.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index c5740b8d2315..8da85eee65a5 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2512,8 +2512,11 @@ intel_dp_dsc_compute_pipe_bpp_limits(struct intel_dp *intel_dp,
 	int dsc_min_bpc = intel_dp_dsc_min_src_input_bpc();
 	int dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(display);
 
-	limits->pipe.max_bpp = min(limits->pipe.max_bpp, dsc_max_bpc * 3);
-	limits->pipe.min_bpp = max(limits->pipe.min_bpp, dsc_min_bpc * 3);
+	limits->pipe.max_bpp = clamp(limits->pipe.max_bpp,
+				     dsc_min_bpc * 3, dsc_max_bpc * 3);
+
+	limits->pipe.min_bpp = clamp(limits->pipe.min_bpp,
+				     dsc_min_bpc * 3, dsc_max_bpc * 3);
 }
 
 static bool
-- 
2.45.2