[PATCH] drm/i915/vdsc: Add bpc check in intel_dsc_compute_params

[Suraj Kandpal]

DSC does not support bpc under 8. Return an error if that
happens to be the case.

Signed-off-by: Suraj Kandpal <suraj.kandpal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_vdsc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 8158e3702ed5..39bf8bee106c 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -297,6 +297,11 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 
 	vdsc_cfg->bits_per_pixel = pipe_config->dsc.compressed_bpp_x16;
 
+	if (vdsc_cfg->bites_per_pixel < 8) {
+		drm_dbg_kms(&dev_priv->drm, "DSC bpc requirements not met\n");
+		return -EINVAL;
+	}
+
 	/*
 	 * According to DSC 1.2 specs in Section 4.1 if native_420 is set
 	 * we need to double the current bpp.
-- 
2.43.2