Now that we have laid the groundwork for YUV420 Enablement
we fill up native_420 field in vdsc_cfg and add appropriate
checks wherever required.
---v2
-adding native_422 field as 0 [Vandita]
-filling in second_line_bpg_offset, second_line_offset_adj
and nsl_bpg_offset in vds_cfg when native_420 is true
---v3
-adding display version check to solve igt issue
--v7
-remove is_pipe_dsc check as its always true for D14 [Jani]
--v10
-keep sink capability check [Jani]
-move from !(x == y || w == z) to x !=y && w != z [Jani]
--v11
-avoid native_420 computation if not gen14 [Uma]
Cc: Uma Shankar <uma.shan...@intel.com>
Cc: Jani Nikula <jani.nik...@linux.intel.com>
Signed-off-by: Suraj Kandpal <suraj.kand...@intel.com>
---
drivers/gpu/drm/i915/display/icl_dsi.c | 2 -
drivers/gpu/drm/i915/display/intel_dp.c | 7 ++-
drivers/gpu/drm/i915/display/intel_vdsc.c | 74 ++++++++++++++++++++++-
3 files changed, 75 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c
b/drivers/gpu/drm/i915/display/icl_dsi.c
index 05e749861658..7065203460d3 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1534,8 +1534,6 @@ static int gen11_dsi_dsc_compute_config(struct
intel_encoder *encoder,
if (crtc_state->dsc.slice_count > 1)
crtc_state->dsc.dsc_split = true;
- vdsc_cfg->convert_rgb = true;
-
/* FIXME: initialize from VBT */
vdsc_cfg->rc_model_size = DSC_RC_MODEL_SIZE_CONST;
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
b/drivers/gpu/drm/i915/display/intel_dp.c
index f2fb3ec2dd99..95e9d0365e23 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1466,9 +1466,10 @@ static int intel_dp_dsc_compute_params(struct
intel_encoder *encoder,
vdsc_cfg->dsc_version_minor =
min(intel_dp_source_dsc_version_minor(intel_dp),
intel_dp_sink_dsc_version_minor(intel_dp));
-
- vdsc_cfg->convert_rgb = intel_dp->dsc_dpcd[DP_DSC_DEC_COLOR_FORMAT_CAP
- DP_DSC_SUPPORT] &
- DP_DSC_RGB;
+ if (vdsc_cfg->convert_rgb)
+ vdsc_cfg->convert_rgb =
+ intel_dp->dsc_dpcd[DP_DSC_DEC_COLOR_FORMAT_CAP -
DP_DSC_SUPPORT] &
+ DP_DSC_RGB;
line_buf_depth = drm_dp_dsc_sink_line_buf_depth(intel_dp->dsc_dpcd);
if (!line_buf_depth) {
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c
b/drivers/gpu/drm/i915/display/intel_vdsc.c
index ed16f63d6355..32997c9773aa 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -460,14 +460,50 @@ int intel_dsc_compute_params(struct intel_crtc_state
*pipe_config)
vdsc_cfg->pic_width = pipe_config->hw.adjusted_mode.crtc_hdisplay;
vdsc_cfg->slice_width = DIV_ROUND_UP(vdsc_cfg->pic_width,
pipe_config->dsc.slice_count);
-
- /* Gen 11 does not support YCbCr */
+ /*
+ * According to DSC 1.2 specs if colorspace is YCbCr then convert_rgb
is 0
+ * else 1
+ */
+ vdsc_cfg->convert_rgb = pipe_config->output_format !=
INTEL_OUTPUT_FORMAT_YCBCR420 &&
+ pipe_config->output_format !=
INTEL_OUTPUT_FORMAT_YCBCR444;
+
+ if (DISPLAY_VER(dev_priv) >= 14 &&
+ pipe_config->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
+ vdsc_cfg->native_420 = true;
+ /* We do not support YcBCr422 as of now */
+ vdsc_cfg->native_422 = false;
vdsc_cfg->simple_422 = false;
/* Gen 11 does not support VBR */
vdsc_cfg->vbr_enable = false;
/* Gen 11 only supports integral values of bpp */
vdsc_cfg->bits_per_pixel = compressed_bpp << 4;
+
+ /*
+ * According to DSC 1.2 specs in Section 4.1 if native_420 is set:
+ * -We need to double the current bpp.
+ * -second_line_bpg_offset is 12 in general and equal to
2*(slice_height-1) if slice
+ * height < 8.
+ * -second_line_offset_adj is 512 as shown by emperical values to yeild
best chroma
+ * preservation in second line.
+ * -nsl_bpg_offset is calculated as second_line_offset/slice_height -1
then rounded
+ * up to 16 fractional bits, we left shift second line offset by 11 to
preserve 11
+ * fractional bits.
+ */
+ if (vdsc_cfg->native_420) {
+ vdsc_cfg->bits_per_pixel <<= 1;
+
+ if (vdsc_cfg->slice_height >= 8)
+ vdsc_cfg->second_line_bpg_offset = 12;
+ else
+ vdsc_cfg->second_line_bpg_offset =
+ 2 * (vdsc_cfg->slice_height - 1);
+
+ vdsc_cfg->second_line_offset_adj = 512;
+ vdsc_cfg->nsl_bpg_offset =
DIV_ROUND_UP(vdsc_cfg->second_line_bpg_offset << 11,
+ vdsc_cfg->slice_height
- 1);
+ }
+
vdsc_cfg->bits_per_component = pipe_config->pipe_bpp / 3;
for (i = 0; i < DSC_NUM_BUF_RANGES - 1; i++) {
@@ -594,8 +630,13 @@ static void intel_dsc_pps_configure(const struct
intel_crtc_state *crtc_state)
DSC_VER_MIN_SHIFT |
vdsc_cfg->bits_per_component << DSC_BPC_SHIFT |
vdsc_cfg->line_buf_depth << DSC_LINE_BUF_DEPTH_SHIFT;
- if (vdsc_cfg->dsc_version_minor == 2)
+ if (vdsc_cfg->dsc_version_minor == 2) {
pps_val |= DSC_ALT_ICH_SEL;
+ if (vdsc_cfg->native_420)
+ pps_val |= DSC_NATIVE_420_ENABLE;
+ if (vdsc_cfg->native_422)
+ pps_val |= DSC_NATIVE_422_ENABLE;
+ }
if (vdsc_cfg->block_pred_enable)
pps_val |= DSC_BLOCK_PREDICTION;
if (vdsc_cfg->convert_rgb)
@@ -906,6 +947,33 @@ static void intel_dsc_pps_configure(const struct
intel_crtc_state *crtc_state)
pps_val);
}
+ if (DISPLAY_VER(dev_priv) >= 14) {
+ /* Populate PICTURE_PARAMETER_SET_17 registers */
+ pps_val = 0;
+ pps_val |= DSC_SL_BPG_OFFSET(vdsc_cfg->second_line_bpg_offset);
+ drm_dbg_kms(&dev_priv->drm, "PPS17 = 0x%08x\n", pps_val);
+ intel_de_write(dev_priv,
+ MTL_DSC0_PICTURE_PARAMETER_SET_17(pipe),
+ pps_val);
+ if (crtc_state->dsc.dsc_split)
+ intel_de_write(dev_priv,
+ MTL_DSC1_PICTURE_PARAMETER_SET_17(pipe),
+ pps_val);
+
+ /* Populate PICTURE_PARAMETER_SET_18 registers */
+ pps_val = 0;
+ pps_val |= DSC_NSL_BPG_OFFSET(vdsc_cfg->nsl_bpg_offset) |
+ DSC_SL_OFFSET_ADJ(vdsc_cfg->second_line_offset_adj);
+ drm_dbg_kms(&dev_priv->drm, "PPS18 = 0x%08x\n", pps_val);
+ intel_de_write(dev_priv,
+ MTL_DSC0_PICTURE_PARAMETER_SET_18(pipe),
+ pps_val);
+ if (crtc_state->dsc.dsc_split)
+ intel_de_write(dev_priv,
+ MTL_DSC1_PICTURE_PARAMETER_SET_18(pipe),
+ pps_val);
+ }
+
/* Populate the RC_BUF_THRESH registers */
memset(rc_buf_thresh_dword, 0, sizeof(rc_buf_thresh_dword));
for (i = 0; i < DSC_NUM_BUF_RANGES - 1; i++) {
--
2.25.1
