Re: [PATCH v3 3/5] drm/msm/dpu: handle perf mode in _dpu_core_perf_crtc_update_bus()

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On 3/13/2024 6:10 PM, Dmitry Baryshkov wrote:
Move perf mode handling for the bandwidth to
_dpu_core_perf_crtc_update_bus() rather than overriding per-CRTC data
and then aggregating known values.

Note, this changes the fix_core_ab_vote. Previously it would be
multiplied per the CRTC number, now it will be used directly for
interconnect voting.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
  drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c | 39 +++++++++++++--------------
  1 file changed, 19 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
index 87b892069526..ff2942a6a678 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
@@ -118,21 +118,9 @@ static void _dpu_core_perf_calc_crtc(const struct dpu_core_perf *core_perf,
  		return;
  	}
- memset(perf, 0, sizeof(struct dpu_core_perf_params));
-
-	if (core_perf->perf_tune.mode == DPU_PERF_MODE_MINIMUM) {
-		perf->bw_ctl = 0;
-		perf->max_per_pipe_ib = 0;
-		perf->core_clk_rate = 0;
-	} else if (core_perf->perf_tune.mode == DPU_PERF_MODE_FIXED) {
-		perf->bw_ctl = core_perf->fix_core_ab_vote;
-		perf->max_per_pipe_ib = core_perf->fix_core_ib_vote;
-		perf->core_clk_rate = core_perf->fix_core_clk_rate;
-	} else {
-		perf->bw_ctl = _dpu_core_perf_calc_bw(perf_cfg, crtc);
-		perf->max_per_pipe_ib = perf_cfg->min_dram_ib;
-		perf->core_clk_rate = _dpu_core_perf_calc_clk(perf_cfg, crtc, state);
-	}
+	perf->bw_ctl = _dpu_core_perf_calc_bw(perf_cfg, crtc);
+	perf->max_per_pipe_ib = perf_cfg->min_dram_ib;
+	perf->core_clk_rate = _dpu_core_perf_calc_clk(perf_cfg, crtc, state);
DRM_DEBUG_ATOMIC(
  		"crtc=%d clk_rate=%llu core_ib=%llu core_ab=%llu\n",
@@ -233,18 +221,29 @@ static int _dpu_core_perf_crtc_update_bus(struct dpu_kms *kms,
  {
  	struct dpu_core_perf_params perf = { 0 };
  	int i, ret = 0;
-	u64 avg_bw;
+	u32 avg_bw;
+	u32 peak_bw;
if (!kms->num_paths)
  		return 0;
- dpu_core_perf_aggregate(crtc->dev, dpu_crtc_get_client_type(crtc), &perf);
+	if (kms->perf.perf_tune.mode == DPU_PERF_MODE_MINIMUM) {
+		avg_bw = 0;
+		peak_bw = 0;
+	} else if (kms->perf.perf_tune.mode == DPU_PERF_MODE_FIXED) {
+		avg_bw = kms->perf.fix_core_ab_vote;
+		peak_bw = kms->perf.fix_core_ib_vote;
+	} else {
+		dpu_core_perf_aggregate(crtc->dev, dpu_crtc_get_client_type(crtc), &perf);

Where is this function dpu_core_perf_aggregate() defined? I dont see it in msm-next

+
+		avg_bw = div_u64(perf.bw_ctl, 1000); /*Bps_to_icc*/
+		peak_bw = perf.max_per_pipe_ib;
+	}
- avg_bw = perf.bw_ctl;
-	do_div(avg_bw, (kms->num_paths * 1000)); /*Bps_to_icc*/
+	avg_bw /= kms->num_paths;
for (i = 0; i < kms->num_paths; i++)
-		icc_set_bw(kms->path[i], avg_bw, perf.max_per_pipe_ib);
+		icc_set_bw(kms->path[i], avg_bw, peak_bw);
return ret;
  }




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