[PATCH 17/32] drm/i915/dp: Separate out functions for edp/DP for computing DSC bpp
Ankit Nautiyal
ankit.k.nautiyal at intel.com
Fri Jun 30 10:18:54 UTC 2023
Refactor code to separate functions for eDP and DP for computing
pipe_bpp/compressed bpp when DSC is involved.
This will help to optimize the link configuration for DP later.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
drivers/gpu/drm/i915/display/intel_dp.c | 190 ++++++++++++++++--------
1 file changed, 126 insertions(+), 64 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 9e0f2de90435..16f7ee74ed5e 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1714,6 +1714,115 @@ bool is_dsc_pipe_bpp_sufficient(struct drm_i915_private *i915, int pipe_bpp)
return pipe_bpp >= intel_dp_dsc_min_src_input_bpc(i915) * 3;
}
+static
+int intel_dp_force_dsc_pipe_bpp(struct intel_dp *intel_dp)
+{
+ struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+ int forced_bpp;
+
+ if (!intel_dp->force_dsc_bpc)
+ return 0;
+
+ forced_bpp = intel_dp->force_dsc_bpc * 3;
+
+ if (is_dsc_pipe_bpp_sufficient(i915, forced_bpp)) {
+ drm_dbg_kms(&i915->drm, "Input DSC BPC forced to %d\n", intel_dp->force_dsc_bpc);
+ return forced_bpp;
+ }
+
+ drm_dbg_kms(&i915->drm, "Cannot force DSC BPC:%d, due to DSC BPC limits\n", intel_dp->force_dsc_bpc);
+
+ return 0;
+}
+
+static int intel_dp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
+ struct intel_crtc_state *pipe_config,
+ struct drm_connector_state *conn_state,
+ struct link_config_limits *limits,
+ int timeslots)
+{
+ const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
+ struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+ u16 output_bpp, dsc_max_compressed_bpp = 0;
+ int forced_bpp, pipe_bpp;
+
+ forced_bpp = intel_dp_force_dsc_pipe_bpp(intel_dp);
+
+ if (forced_bpp) {
+ pipe_bpp = forced_bpp;
+ } else {
+ pipe_bpp = intel_dp_dsc_compute_max_bpp(intel_dp, conn_state->max_requested_bpc);
+
+ if (!is_dsc_pipe_bpp_sufficient(i915, pipe_bpp)) {
+ drm_dbg_kms(&i915->drm,
+ "Computed BPC less than min supported by source for DSC\n");
+ return -EINVAL;
+ }
+ }
+ /*
+ * For now enable DSC for max link rate, max lane count.
+ * Optimize this later for the minimum possible link rate/lane count
+ * with DSC enabled for the requested mode.
+ */
+ pipe_config->port_clock = limits->max_rate;
+ pipe_config->lane_count = limits->max_lane_count;
+ dsc_max_compressed_bpp = intel_dp_dsc_get_max_compressed_bpp(i915,
+ pipe_config->port_clock,
+ pipe_config->lane_count,
+ adjusted_mode->crtc_clock,
+ adjusted_mode->crtc_hdisplay,
+ pipe_config->bigjoiner_pipes,
+ pipe_config->output_format,
+ pipe_bpp,
+ timeslots);
+ if (!dsc_max_compressed_bpp) {
+ drm_dbg_kms(&i915->drm, "Compressed BPP not supported\n");
+ return -EINVAL;
+ }
+
+
+ output_bpp = intel_dp_output_bpp(pipe_config->output_format, pipe_bpp);
+
+ pipe_config->dsc.compressed_bpp = min_t(u16, dsc_max_compressed_bpp, output_bpp);
+
+ pipe_config->pipe_bpp = pipe_bpp;
+
+ return 0;
+}
+
+static int intel_edp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
+ struct intel_crtc_state *pipe_config,
+ struct drm_connector_state *conn_state,
+ struct link_config_limits *limits)
+{
+ struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+ int pipe_bpp, forced_bpp;
+
+ forced_bpp = intel_dp_force_dsc_pipe_bpp(intel_dp);
+
+ if (forced_bpp) {
+ pipe_bpp = forced_bpp;
+ } else {
+ /* For eDP use max bpp that can be supported with DSC. */
+ pipe_bpp = intel_dp_dsc_compute_max_bpp(intel_dp,
+ conn_state->max_requested_bpc);
+ if (!is_dsc_pipe_bpp_sufficient(i915, pipe_bpp)) {
+ drm_dbg_kms(&i915->drm,
+ "Computed BPC less than min supported by source for DSC\n");
+ return -EINVAL;
+ }
+ }
+ pipe_config->port_clock = limits->max_rate;
+ pipe_config->lane_count = limits->max_lane_count;
+ pipe_config->dsc.compressed_bpp =
+ min_t(u16, drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4,
+ pipe_bpp);
+
+ pipe_config->pipe_bpp = pipe_bpp;
+
+ return 0;
+}
+
int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
struct intel_crtc_state *pipe_config,
struct drm_connector_state *conn_state,
@@ -1736,43 +1845,28 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
if (!intel_dp_dsc_supports_format(intel_dp, pipe_config->output_format))
return -EINVAL;
+ /*
+ * compute pipe bpp is set to false for DP MST DSC case
+ * and compressed_bpp is calculated same time once
+ * vpci timeslots are allocated, because overall bpp
+ * calculation procedure is bit different for MST case.
+ */
if (compute_pipe_bpp) {
- int pipe_bpp;
- int forced_bpp = intel_dp->force_dsc_bpc * 3;
-
- if (forced_bpp && is_dsc_pipe_bpp_sufficient(dev_priv, forced_bpp)) {
- pipe_bpp = forced_bpp;
- drm_dbg_kms(&dev_priv->drm, "Input DSC BPC forced to %d\n", intel_dp->force_dsc_bpc);
- } else {
- drm_WARN(&dev_priv->drm, forced_bpp,
- "Cannot force DSC BPC:%d, due to DSC BPC limits\n",
- intel_dp->force_dsc_bpc);
-
- pipe_bpp = intel_dp_dsc_compute_max_bpp(intel_dp,
- conn_state->max_requested_bpc);
-
- if (!is_dsc_pipe_bpp_sufficient(dev_priv, pipe_bpp)) {
- drm_dbg_kms(&dev_priv->drm,
- "Computed BPC less than min supported by source for DSC\n");
- return -EINVAL;
- }
+ if (intel_dp_is_edp(intel_dp))
+ ret = intel_edp_dsc_compute_pipe_bpp(intel_dp, pipe_config,
+ conn_state, limits);
+ else
+ ret = intel_dp_dsc_compute_pipe_bpp(intel_dp, pipe_config,
+ conn_state, limits, timeslots);
+ if (ret) {
+ drm_dbg_kms(&dev_priv->drm,
+ "No Valid pipe bpp for given mode ret = %d\n", ret);
+ return ret;
}
-
- pipe_config->pipe_bpp = pipe_bpp;
}
- /*
- * For now enable DSC for max link rate, max lane count.
- * Optimize this later for the minimum possible link rate/lane count
- * with DSC enabled for the requested mode.
- */
- pipe_config->port_clock = limits->max_rate;
- pipe_config->lane_count = limits->max_lane_count;
-
+ /* Calculate Slice count */
if (intel_dp_is_edp(intel_dp)) {
- pipe_config->dsc.compressed_bpp =
- min_t(u16, drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4,
- pipe_config->pipe_bpp);
pipe_config->dsc.slice_count =
drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
true);
@@ -1782,26 +1876,8 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
return -EINVAL;
}
} else {
- u16 dsc_max_compressed_bpp = 0;
u8 dsc_dp_slice_count;
- if (compute_pipe_bpp) {
- dsc_max_compressed_bpp =
- intel_dp_dsc_get_max_compressed_bpp(dev_priv,
- pipe_config->port_clock,
- pipe_config->lane_count,
- adjusted_mode->crtc_clock,
- adjusted_mode->crtc_hdisplay,
- pipe_config->bigjoiner_pipes,
- pipe_config->output_format,
- pipe_config->pipe_bpp,
- timeslots);
- if (!dsc_max_compressed_bpp) {
- drm_dbg_kms(&dev_priv->drm,
- "Compressed BPP not supported\n");
- return -EINVAL;
- }
- }
dsc_dp_slice_count =
intel_dp_dsc_get_slice_count(intel_dp,
adjusted_mode->crtc_clock,
@@ -1813,20 +1889,6 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
return -EINVAL;
}
- /*
- * compute pipe bpp is set to false for DP MST DSC case
- * and compressed_bpp is calculated same time once
- * vpci timeslots are allocated, because overall bpp
- * calculation procedure is bit different for MST case.
- */
- if (compute_pipe_bpp) {
- u16 output_bpp = intel_dp_output_bpp(pipe_config->output_format,
- pipe_config->pipe_bpp);
-
- pipe_config->dsc.compressed_bpp = min_t(u16,
- dsc_max_compressed_bpp,
- output_bpp);
- }
pipe_config->dsc.slice_count = dsc_dp_slice_count;
}
/*
--
2.40.1
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