A follow-up patch will need to limit the output link bpp both in the
non-DSC and DSC configuration, so track the pipe and link bpp limits
separately in the link_config_limits struct.
Use .4 fixed point format for link bpp matching the 1/16 bpp granularity
in DSC mode and for now keep this limit matching the pipe bpp limit.
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp.c | 17 +++++++++++------
drivers/gpu/drm/i915/display/intel_dp.h | 9 ++++++++-
drivers/gpu/drm/i915/display/intel_dp_mst.c | 17 +++++++++++------
3 files changed, 30 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 89de444cfc4da..f4952fcfb16e9 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1419,7 +1419,7 @@ intel_dp_adjust_compliance_config(struct intel_dp *intel_dp,
if (intel_dp->compliance.test_data.bpc != 0) {
int bpp = 3 * intel_dp->compliance.test_data.bpc;
- limits->min_bpp = limits->max_bpp = bpp;
+ limits->pipe.min_bpp = limits->pipe.max_bpp = bpp;
pipe_config->dither_force_disable = bpp == 6 * 3;
drm_dbg_kms(&i915->drm, "Setting pipe_bpp to %d\n", bpp);
@@ -1481,7 +1481,9 @@ intel_dp_compute_link_config_wide(struct intel_dp *intel_dp,
int bpp, i, lane_count, clock = intel_dp_mode_clock(pipe_config, conn_state);
int mode_rate, link_rate, link_avail;
- for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
+ for (bpp = limits->link.max_bpp >> 4;
+ bpp >= limits->link.min_bpp >> 4;
+ bpp -= 2 * 3) {
int output_bpp = intel_dp_output_bpp(pipe_config->output_format, bpp);
mode_rate = intel_dp_link_required(clock, output_bpp);
@@ -1812,9 +1814,9 @@ intel_dp_compute_config_limits(struct intel_dp *intel_dp,
limits->min_lane_count = 1;
limits->max_lane_count = intel_dp_max_lane_count(intel_dp);
- limits->min_bpp = intel_dp_min_bpp(crtc_state->output_format);
- limits->max_bpp = intel_dp_max_bpp(intel_dp, crtc_state,
- respect_downstream_limits);
+ limits->pipe.min_bpp = intel_dp_min_bpp(crtc_state->output_format);
+ limits->pipe.max_bpp = intel_dp_max_bpp(intel_dp, crtc_state,
+ respect_downstream_limits);
if (intel_dp->use_max_params) {
/*
@@ -1831,10 +1833,13 @@ intel_dp_compute_config_limits(struct intel_dp *intel_dp,
intel_dp_adjust_compliance_config(intel_dp, crtc_state, limits);
+ limits->link.min_bpp = limits->pipe.min_bpp << 4;
+ limits->link.max_bpp = limits->pipe.max_bpp << 4;
+
drm_dbg_kms(&i915->drm, "DP link computation with max lane count %i "
"max rate %d max bpp %d pixel clock %iKHz\n",
limits->max_lane_count, limits->max_rate,
- limits->max_bpp, adjusted_mode->crtc_clock);
+ limits->link.max_bpp >> 4, adjusted_mode->crtc_clock);
}
static int
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 22099de3ca458..a1789419c0d19 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -26,7 +26,14 @@ struct intel_encoder;
struct link_config_limits {
int min_rate, max_rate;
int min_lane_count, max_lane_count;
- int min_bpp, max_bpp;
+ struct {
+ /* Uncompressed DSC input or link output bpp in 1 bpp units */
+ int min_bpp, max_bpp;
+ } pipe;
+ struct {
+ /* Compressed or uncompressed link output bpp in 1/16 bpp units */
+ int min_bpp, max_bpp;
+ } link;
};
void intel_edp_fixup_vbt_bpp(struct intel_encoder *encoder, int pipe_bpp);
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 998d8a186cc6f..1809643538d08 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -156,8 +156,10 @@ static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
&crtc_state->hw.adjusted_mode;
int slots = -EINVAL;
- slots = intel_dp_mst_find_vcpi_slots_for_bpp(encoder, crtc_state, limits->max_bpp,
- limits->min_bpp, limits,
+ slots = intel_dp_mst_find_vcpi_slots_for_bpp(encoder, crtc_state,
+ limits->link.max_bpp >> 4,
+ limits->link.min_bpp >> 4,
+ limits,
conn_state, 2 * 3, false);
if (slots < 0)
@@ -200,8 +202,8 @@ static int intel_dp_dsc_mst_compute_link_config(struct intel_encoder *encoder,
else
dsc_max_bpc = min_t(u8, 10, conn_state->max_requested_bpc);
- max_bpp = min_t(u8, dsc_max_bpc * 3, limits->max_bpp);
- min_bpp = limits->min_bpp;
+ max_bpp = min_t(u8, dsc_max_bpc * 3, limits->pipe.max_bpp);
+ min_bpp = limits->pipe.min_bpp;
num_bpc = drm_dp_dsc_sink_supported_input_bpcs(intel_dp->dsc_dpcd,
dsc_bpc);
@@ -318,7 +320,7 @@ intel_dp_mst_compute_config_limits(struct intel_dp *intel_dp,
limits->min_lane_count = limits->max_lane_count =
intel_dp_max_lane_count(intel_dp);
- limits->min_bpp = intel_dp_min_bpp(crtc_state->output_format);
+ limits->pipe.min_bpp = intel_dp_min_bpp(crtc_state->output_format);
/*
* FIXME: If all the streams can't fit into the link with
* their current pipe_bpp we should reduce pipe_bpp across
@@ -327,9 +329,12 @@ intel_dp_mst_compute_config_limits(struct intel_dp *intel_dp,
* MST streams previously. This hack should be removed once
* we have the proper retry logic in place.
*/
- limits->max_bpp = min(crtc_state->pipe_bpp, 24);
+ limits->pipe.max_bpp = min(crtc_state->pipe_bpp, 24);
intel_dp_adjust_compliance_config(intel_dp, crtc_state, limits);
+
+ limits->link.min_bpp = limits->pipe.min_bpp << 4;
+ limits->link.max_bpp = limits->pipe.max_bpp << 4;
}
static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
--
2.37.2
