[Intel-gfx] [PATCH v3 5/7] drm/i915/dsc: Fill in native_420 field
Suraj Kandpal
suraj.kandpal at intel.com
Thu Mar 9 06:28:53 UTC 2023
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]
--v12
-fix state mismatch issue of compressed_bpp
Cc: Uma Shankar <uma.shankar at intel.com>
Cc: Jani Nikula <jani.nikula at linux.intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal at intel.com>
Reviewed-by: Uma Shankar <uma.shankar at intel.com>
---
drivers/gpu/drm/i915/display/icl_dsi.c | 2 -
drivers/gpu/drm/i915/display/intel_dp.c | 16 +++-
drivers/gpu/drm/i915/display/intel_vdsc.c | 98 ++++++++++++++++++++---
3 files changed, 100 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 50dcaa895854..dde0269a2778 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1552,8 +1552,6 @@ 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 c725b40e2718..b40bb5fd9abb 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1467,9 +1467,10 @@ 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) {
@@ -1587,6 +1588,15 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
pipe_config->bigjoiner_pipes,
pipe_bpp,
timeslots);
+ /*
+ * According to DSC 1.2a Section 4.1.1 Table 4.1 the maximum
+ * supported PPS value can be 63.9375 and with the further
+ * mention that bpp should be programmed double the target bpp
+ * restricting our target bpp to be 31.9375 at max
+ */
+ if (pipe_config->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
+ dsc_max_output_bpp = min_t(u16, dsc_max_output_bpp, 31 << 4);
+
if (!dsc_max_output_bpp) {
drm_dbg_kms(&dev_priv->drm,
"Compressed BPP not supported\n");
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 6fa70f3c074b..0388efb49b92 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -461,14 +461,50 @@ 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++) {
@@ -595,8 +631,13 @@ 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)
@@ -907,6 +948,33 @@ 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++) {
@@ -1181,7 +1249,7 @@ void intel_dsc_get_config(struct intel_crtc_state *crtc_state)
enum pipe pipe = crtc->pipe;
enum intel_display_power_domain power_domain;
intel_wakeref_t wakeref;
- u32 dss_ctl1, dss_ctl2, val;
+ u32 dss_ctl1, dss_ctl2, pps0 = 0, pps1 = 0;
if (!intel_dsc_source_support(crtc_state))
return;
@@ -1204,13 +1272,21 @@ void intel_dsc_get_config(struct intel_crtc_state *crtc_state)
/* FIXME: add more state readout as needed */
- /* PPS1 */
- if (!is_pipe_dsc(crtc, cpu_transcoder))
- val = intel_de_read(dev_priv, DSCA_PICTURE_PARAMETER_SET_1);
- else
- val = intel_de_read(dev_priv,
- ICL_DSC0_PICTURE_PARAMETER_SET_1(pipe));
- vdsc_cfg->bits_per_pixel = val;
+ /* PPS0 & PPS1 */
+ if (!is_pipe_dsc(crtc, cpu_transcoder)) {
+ pps1 = intel_de_read(dev_priv, DSCA_PICTURE_PARAMETER_SET_1);
+ } else {
+ pps0 = intel_de_read(dev_priv,
+ ICL_DSC0_PICTURE_PARAMETER_SET_0(pipe));
+ pps1 = intel_de_read(dev_priv,
+ ICL_DSC0_PICTURE_PARAMETER_SET_1(pipe));
+ }
+
+ vdsc_cfg->bits_per_pixel = pps1;
+
+ if (pps0 & DSC_NATIVE_420_ENABLE)
+ vdsc_cfg->bits_per_pixel >>= 1;
+
crtc_state->dsc.compressed_bpp = vdsc_cfg->bits_per_pixel >> 4;
out:
intel_display_power_put(dev_priv, power_domain, wakeref);
--
2.25.1
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