Commit dc22aa13 authored by Vandita Kulkarni's avatar Vandita Kulkarni
Browse files

drm/i915/display/dsc: Force dsc BPP 



Set DSC BPP to the value forced through
debugfs. It can go from bpc to bpp-1.

v2: Use default dsc bpp when we are just
    doing force_dsc_en, use default dsc bpp
    for invalid force_dsc_bpp values. (Jani)

Signed-off-by: default avatarVandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: default avatarSwati Sharma <swati2.sharma@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210720064907.9771-4-vandita.kulkarni@intel.com
parent da3829ef

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

+17 −0
Original line number Diff line number Diff line
@@ -1274,6 +1274,23 @@ static int intel_dp_dsc_compute_config(struct intel_dp *intel_dp, 
							       pipe_config->pipe_bpp);

		pipe_config->dsc.slice_count = dsc_dp_slice_count;

	}



	/* As of today we support DSC for only RGB */

	if (intel_dp->force_dsc_bpp) {

		if (intel_dp->force_dsc_bpp >= 8 &&

		    intel_dp->force_dsc_bpp < pipe_bpp) {

			drm_dbg_kms(&dev_priv->drm,

				    "DSC BPP forced to %d",

				    intel_dp->force_dsc_bpp);

			pipe_config->dsc.compressed_bpp =

						intel_dp->force_dsc_bpp;

		} else {

			drm_dbg_kms(&dev_priv->drm,

				    "Invalid DSC BPP %d",

				    intel_dp->force_dsc_bpp);

		}

	}



	/*

	 * VDSC engine operates at 1 Pixel per clock, so if peak pixel rate

	 * is greater than the maximum Cdclock and if slice count is even