Commit 9572bdfe authored by Suraj Kandpal's avatar Suraj Kandpal
Browse files

drm/i915/vdsc: Add bpc check in intel_dsc_compute_params 



DSC does not support bpc under 8 according to DSC 1.2a Section 2
Requirements. Return an error if that happens to be the case.

--v2
-should be bit_per_component [Mitul/Chaitanya]
-Add reference to this restriction [Chaitanya]

--v3
-Add the bpc in which we see this warning [Jani]

Signed-off-by: default avatarSuraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: default avatarChaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240926081327.1409518-2-suraj.kandpal@intel.com
parent df3859a4

drivers/gpu/drm/i915/display/intel_vdsc.c

+6 −0
Original line number Diff line number Diff line
@@ -306,6 +306,12 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config) 


	vdsc_cfg->bits_per_component = pipe_config->pipe_bpp / 3;



	if (vdsc_cfg->bits_per_component < 8) {

		drm_dbg_kms(&dev_priv->drm, "DSC bpc requirements not met bpc: %d\n",

			    vdsc_cfg->bits_per_component);

		return -EINVAL;

	}



	drm_dsc_set_rc_buf_thresh(vdsc_cfg);



	/*