[PATCH v4 11/12] drm/i915/dsc: use additional DSC helpers

[Dmitry Baryshkov]

Switch to drm_dsc_set_const_params() to set some semi-constant
parameters. The rc_model_size, which is set beforehand, is preserved by
the helper. Also make use of drm_dsc_set_initial_scale_value().

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
 drivers/gpu/drm/i915/display/intel_vdsc.c | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index bd9116d2cd76..2d4917ca1f14 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -216,6 +216,7 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 
 	vdsc_cfg->bits_per_component = pipe_config->pipe_bpp / 3;
 
+	drm_dsc_set_const_params(vdsc_cfg);
 	drm_dsc_set_rc_buf_thresh(vdsc_cfg);
 
 	/*
@@ -251,19 +252,7 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 			vdsc_cfg->rc_range_params[0].range_bpg_offset = 0;
 	}
 
-	/*
-	 * BitsPerComponent value determines mux_word_size:
-	 * When BitsPerComponent is less than or 10bpc, muxWordSize will be equal to
-	 * 48 bits otherwise 64
-	 */
-	if (vdsc_cfg->bits_per_component <= 10)
-		vdsc_cfg->mux_word_size = DSC_MUX_WORD_SIZE_8_10_BPC;
-	else
-		vdsc_cfg->mux_word_size = DSC_MUX_WORD_SIZE_12_BPC;
-
-	/* InitialScaleValue is a 6 bit value with 3 fractional bits (U3.3) */
-	vdsc_cfg->initial_scale_value = (vdsc_cfg->rc_model_size << 3) /
-		(vdsc_cfg->rc_model_size - vdsc_cfg->initial_offset);
+	drm_dsc_set_initial_scale_value(vdsc_cfg);
 
 	return 0;
 }
-- 
2.39.2