[Intel-gfx] [PATCH v2 02/22] drm/i915/dp: Track the pipe and link bpp limits separately
Imre Deak
imre.deak at intel.com
Thu Aug 24 08:04:57 UTC 2023
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.
v2: (Jani)
- Add to_bpp_int(), to_bpp_x16() helpers instead of opencoding them.
- Rename link_config_limits::link.min/max_bpp to min/max_bpp_x16.
Cc: Jani Nikula <jani.nikula at linux.intel.com>
Signed-off-by: Imre Deak <imre.deak at intel.com>
---
.../drm/i915/display/intel_display_types.h | 10 ++++++++
drivers/gpu/drm/i915/display/intel_dp.c | 25 +++++++++++--------
drivers/gpu/drm/i915/display/intel_dp.h | 9 ++++++-
drivers/gpu/drm/i915/display/intel_dp_mst.c | 17 ++++++++-----
4 files changed, 44 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 731f2ec04d5cd..5875eff5012ce 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -2108,4 +2108,14 @@ to_intel_frontbuffer(struct drm_framebuffer *fb)
return fb ? to_intel_framebuffer(fb)->frontbuffer : NULL;
}
+static inline int to_bpp_int(int bpp_x16)
+{
+ return bpp_x16 >> 4;
+}
+
+static inline int to_bpp_x16(int bpp)
+{
+ return bpp << 4;
+}
+
#endif /* __INTEL_DISPLAY_TYPES_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 53697f361f950..cf29562795f75 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1470,7 +1470,7 @@ 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);
@@ -1532,7 +1532,9 @@ 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 = to_bpp_int(limits->link.max_bpp_x16);
+ bpp >= to_bpp_int(limits->link.min_bpp_x16);
+ bpp -= 2 * 3) {
int link_bpp = intel_dp_output_bpp(pipe_config->output_format, bpp);
mode_rate = intel_dp_link_required(clock, link_bpp);
@@ -1958,8 +1960,8 @@ bool is_dsc_pipe_bpp_sufficient(struct drm_i915_private *i915,
dsc_max_bpc = min(intel_dp_dsc_max_src_input_bpc(i915), conn_state->max_requested_bpc);
dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(i915);
- dsc_max_pipe_bpp = min(dsc_max_bpc * 3, limits->max_bpp);
- dsc_min_pipe_bpp = max(dsc_min_bpc * 3, limits->min_bpp);
+ dsc_max_pipe_bpp = min(dsc_max_bpc * 3, limits->pipe.max_bpp);
+ dsc_min_pipe_bpp = max(dsc_min_bpc * 3, limits->pipe.min_bpp);
return pipe_bpp >= dsc_min_pipe_bpp &&
pipe_bpp <= dsc_max_pipe_bpp;
@@ -2019,10 +2021,10 @@ static int intel_dp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
return -EINVAL;
dsc_max_bpc = min_t(u8, dsc_max_bpc, max_req_bpc);
- dsc_max_bpp = min(dsc_max_bpc * 3, limits->max_bpp);
+ dsc_max_bpp = min(dsc_max_bpc * 3, limits->pipe.max_bpp);
dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(i915);
- dsc_min_bpp = max(dsc_min_bpc * 3, limits->min_bpp);
+ dsc_min_bpp = max(dsc_min_bpc * 3, limits->pipe.min_bpp);
/*
* Get the maximum DSC bpc that will be supported by any valid
@@ -2203,9 +2205,9 @@ 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) {
/*
@@ -2222,10 +2224,13 @@ intel_dp_compute_config_limits(struct intel_dp *intel_dp,
intel_dp_adjust_compliance_config(intel_dp, crtc_state, limits);
+ limits->link.min_bpp_x16 = to_bpp_x16(limits->pipe.min_bpp);
+ limits->link.max_bpp_x16 = to_bpp_x16(limits->pipe.max_bpp);
+
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);
+ to_bpp_int(limits->link.max_bpp_x16), 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 788a577ebe16e..ebc7f4e60c777 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_x16, max_bpp_x16;
+ } 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 218c2dfd57adc..6c1c996c74e62 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -157,8 +157,10 @@ static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
int slots = -EINVAL;
int link_bpp;
- 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,
+ to_bpp_int(limits->link.max_bpp_x16),
+ to_bpp_int(limits->link.min_bpp_x16),
+ limits,
conn_state, 2 * 3, false);
if (slots < 0)
@@ -203,8 +205,8 @@ 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);
@@ -321,7 +323,7 @@ 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
@@ -330,9 +332,12 @@ 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_x16 = to_bpp_x16(limits->pipe.min_bpp);
+ limits->link.max_bpp_x16 = to_bpp_x16(limits->pipe.max_bpp);
}
static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
--
2.37.2
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