After cross-checking DSC models (20150914, 20161212, 20210623) change
values in rc_parameters tables to follow config files present inside
the DSC model. Handle two places, where i915 tables diverged from the
model, by patching the rc values in the code.
Note: I left one case uncorrected, 8bpp/10bpc/range_max_qp[0], because
the table in the VESA DSC 1.1 sets it to 4.
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_vdsc.c | 22 ++++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 207b2a648d32..a91b70301640 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -86,7 +86,7 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
}
},
/* 6BPP/14BPC */
- { 768, 15, 6144, 15, 25, 23, 27, {
+ { 768, 15, 6144, 15, 25, 23, 23, {
{ 0, 16, 0 }, { 7, 18, -2 }, { 15, 20, -2 }, { 16, 20, -4 },
{ 17, 21, -6 }, { 17, 21, -6 }, { 18, 21, -6 }, { 18, 22, -8 },
{ 19, 23, -8 }, { 20, 24, -10 }, { 21, 24, -10 },
@@ -115,6 +115,10 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
},
/* 8BPP/10BPC */
{ 512, 12, 6144, 7, 16, 15, 15, {
+ /*
+ * DSC model/pre-SCR-cfg has 8 for range_max_qp[0], however
+ * VESA DSC 1.1 Table E-5 sets it to 4.
+ */
{ 0, 4, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
@@ -132,7 +136,7 @@ static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
},
/* 8BPP/14BPC */
{ 512, 12, 6144, 15, 24, 23, 23, {
- { 0, 12, 0 }, { 5, 13, 0 }, { 11, 15, 0 }, { 12, 17, -2 },
+ { 0, 12, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 12, 17, -2 },
{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
{ 15, 21, -8 }, { 15, 22, -10 }, { 17, 22, -10 },
{ 17, 23, -12 }, { 17, 23, -12 }, { 21, 24, -12 },
@@ -529,6 +533,20 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
DSC_RANGE_BPG_OFFSET_MASK;
}
+ if (DISPLAY_VER(dev_priv) < 13) {
+ /*
+ * FIXME: verify that the hardware actually needs these
+ * modifications rather than them being simple typos.
+ */
+ if (compressed_bpp == 6 &&
+ vdsc_cfg->bits_per_component == 8)
+ vdsc_cfg->rc_quant_incr_limit1 = 23;
+
+ if (compressed_bpp == 8 &&
+ vdsc_cfg->bits_per_component == 14)
+ 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
--
2.39.2
