Revert "drm/msm/dpu: add support for clk and bw scaling for display"

This is causing multiple armv7 missing do_div() errors, so lets drop it
for now.

This reverts commit 04d9044.

Cc: Kalyan Thota <kalyan_t@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c

@@ -29,73 +29,6 @@ enum dpu_perf_mode {
 	DPU_PERF_MODE_MAX
 };
 
-/**
- * @_dpu_core_perf_calc_bw() - to calculate BW per crtc
- * @kms -  pointer to the dpu_kms
- * @crtc - pointer to a crtc
- * Return: returns aggregated BW for all planes in crtc.
- */
-static u64 _dpu_core_perf_calc_bw(struct dpu_kms *kms,
-		struct drm_crtc *crtc)
-{
-	struct drm_plane *plane;
-	struct dpu_plane_state *pstate;
-	u64 crtc_plane_bw = 0;
-	u32 bw_factor;
-
-	drm_atomic_crtc_for_each_plane(plane, crtc) {
-		pstate = to_dpu_plane_state(plane->state);
-
-		if (!pstate)
-			continue;
-
-		crtc_plane_bw += pstate->plane_fetch_bw;
-	}
-
-	bw_factor = kms->catalog->perf.bw_inefficiency_factor;
-	if (bw_factor)
-		crtc_plane_bw = mult_frac(crtc_plane_bw, bw_factor, 100);
-
-	return crtc_plane_bw;
-}
-
-/**
- * _dpu_core_perf_calc_clk() - to calculate clock per crtc
- * @kms -  pointer to the dpu_kms
- * @crtc - pointer to a crtc
- * @state - pointer to a crtc state
- * Return: returns max clk for all planes in crtc.
- */
-static u64 _dpu_core_perf_calc_clk(struct dpu_kms *kms,
-		struct drm_crtc *crtc, struct drm_crtc_state *state)
-{
-	struct drm_plane *plane;
-	struct dpu_plane_state *pstate;
-	struct drm_display_mode *mode;
-	u64 crtc_clk;
-	u32 clk_factor;
-
-	mode = &state->adjusted_mode;
-
-	crtc_clk = mode->vtotal * mode->hdisplay * drm_mode_vrefresh(mode);
-
-	drm_atomic_crtc_for_each_plane(plane, crtc) {
-		pstate = to_dpu_plane_state(plane->state);
-
-		if (!pstate)
-			continue;
-
-		crtc_clk = max(pstate->plane_clk, crtc_clk);
-	}
-
-	clk_factor = kms->catalog->perf.clk_inefficiency_factor;
-	if (clk_factor)
-		crtc_clk = mult_frac(crtc_clk, clk_factor, 100);
-
-	return crtc_clk;
-}
-
-
 static struct dpu_kms *_dpu_crtc_get_kms(struct drm_crtc *crtc)
 {
 	struct msm_drm_private *priv;
@@ -118,18 +51,19 @@ static void _dpu_core_perf_calc_crtc(struct dpu_kms *kms,
 	dpu_cstate = to_dpu_crtc_state(state);
 	memset(perf, 0, sizeof(struct dpu_core_perf_params));
 
-	if (kms->perf.perf_tune.mode == DPU_PERF_MODE_MINIMUM) {
+	if (!dpu_cstate->bw_control) {
+		perf->bw_ctl = kms->catalog->perf.max_bw_high *
+					1000ULL;
+		perf->max_per_pipe_ib = perf->bw_ctl;
+		perf->core_clk_rate = kms->perf.max_core_clk_rate;
+	} else if (kms->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 (kms->perf.perf_tune.mode == DPU_PERF_MODE_FIXED) {
 		perf->bw_ctl = kms->perf.fix_core_ab_vote;
 		perf->max_per_pipe_ib = kms->perf.fix_core_ib_vote;
 		perf->core_clk_rate = kms->perf.fix_core_clk_rate;
-	} else {
-		perf->bw_ctl = _dpu_core_perf_calc_bw(kms, crtc);
-		perf->max_per_pipe_ib = kms->catalog->perf.min_dram_ib;
-		perf->core_clk_rate = _dpu_core_perf_calc_clk(kms, crtc, state);
 	}
 
 	DPU_DEBUG(
@@ -181,7 +115,11 @@ int dpu_core_perf_crtc_check(struct drm_crtc *crtc,
 			DPU_DEBUG("crtc:%d bw:%llu ctrl:%d\n",
 				tmp_crtc->base.id, tmp_cstate->new_perf.bw_ctl,
 				tmp_cstate->bw_control);
-
+			/*
+			 * For bw check only use the bw if the
+			 * atomic property has been already set
+			 */
+			if (tmp_cstate->bw_control)
 				bw_sum_of_intfs += tmp_cstate->new_perf.bw_ctl;
 		}
 
@@ -193,7 +131,9 @@ int dpu_core_perf_crtc_check(struct drm_crtc *crtc,
 
 		DPU_DEBUG("final threshold bw limit = %d\n", threshold);
 
-		if (!threshold) {
+		if (!dpu_cstate->bw_control) {
+			DPU_DEBUG("bypass bandwidth check\n");
+		} else if (!threshold) {
 			DPU_ERROR("no bandwidth limits specified\n");
 			return -E2BIG;
 		} else if (bw > threshold) {
@@ -214,8 +154,7 @@ static int _dpu_core_perf_crtc_update_bus(struct dpu_kms *kms,
 					= dpu_crtc_get_client_type(crtc);
 	struct drm_crtc *tmp_crtc;
 	struct dpu_crtc_state *dpu_cstate;
-	int i, ret = 0;
-	u64 avg_bw;
+	int ret = 0;
 
 	drm_for_each_crtc(tmp_crtc, crtc->dev) {
 		if (tmp_crtc->enabled &&
@@ -226,21 +165,10 @@ static int _dpu_core_perf_crtc_update_bus(struct dpu_kms *kms,
 			perf.max_per_pipe_ib = max(perf.max_per_pipe_ib,
 					dpu_cstate->new_perf.max_per_pipe_ib);
 
-			perf.bw_ctl += dpu_cstate->new_perf.bw_ctl;
-
-			DPU_DEBUG("crtc=%d bw=%llu paths:%d\n",
-				  tmp_crtc->base.id,
-				  dpu_cstate->new_perf.bw_ctl, kms->num_paths);
+			DPU_DEBUG("crtc=%d bw=%llu\n", tmp_crtc->base.id,
+					dpu_cstate->new_perf.bw_ctl);
 		}
 	}
-
-	avg_bw = kms->num_paths ?
-			perf.bw_ctl / kms->num_paths : 0;
-
-	for (i = 0; i < kms->num_paths; i++)
-		icc_set_bw(kms->path[i],
-			Bps_to_icc(avg_bw), (perf.max_per_pipe_ib));
-
 	return ret;
 }
 

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c

@@ -541,8 +541,7 @@ static const struct dpu_perf_cfg sc7180_perf_data = {
 	.max_bw_high = 6800000,
 	.min_core_ib = 2400000,
 	.min_llcc_ib = 800000,
-	.min_dram_ib = 1600000,
-	.min_prefill_lines = 24,
+	.min_dram_ib = 800000,
 	.danger_lut_tbl = {0xff, 0xffff, 0x0},
 	.qos_lut_tbl = {
 		{.nentry = ARRAY_SIZE(sc7180_qos_linear),
@@ -559,8 +558,6 @@ static const struct dpu_perf_cfg sc7180_perf_data = {
 		{.rd_enable = 1, .wr_enable = 1},
 		{.rd_enable = 1, .wr_enable = 0}
 	},
-	.clk_inefficiency_factor = 105,
-	.bw_inefficiency_factor = 120,
 };
 
 /*************************************************************

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h

@@ -651,8 +651,6 @@ struct dpu_perf_cdp_cfg {
  * @downscaling_prefill_lines  downscaling latency in lines
  * @amortizable_theshold minimum y position for traffic shaping prefill
  * @min_prefill_lines  minimum pipeline latency in lines
- * @clk_inefficiency_factor DPU src clock inefficiency factor
- * @bw_inefficiency_factor DPU axi bus bw inefficiency factor
  * @safe_lut_tbl: LUT tables for safe signals
  * @danger_lut_tbl: LUT tables for danger signals
  * @qos_lut_tbl: LUT tables for QoS signals
@@ -677,8 +675,6 @@ struct dpu_perf_cfg {
 	u32 downscaling_prefill_lines;
 	u32 amortizable_threshold;
 	u32 min_prefill_lines;
-	u32 clk_inefficiency_factor;
-	u32 bw_inefficiency_factor;
 	u32 safe_lut_tbl[DPU_QOS_LUT_USAGE_MAX];
 	u32 danger_lut_tbl[DPU_QOS_LUT_USAGE_MAX];
 	struct dpu_qos_lut_tbl qos_lut_tbl[DPU_QOS_LUT_USAGE_MAX];

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c

@@ -303,28 +303,6 @@ static int dpu_kms_global_obj_init(struct dpu_kms *dpu_kms)
 	return 0;
 }
 
-static int dpu_kms_parse_data_bus_icc_path(struct dpu_kms *dpu_kms)
-{
-	struct icc_path *path0;
-	struct icc_path *path1;
-	struct drm_device *dev = dpu_kms->dev;
-
-	path0 = of_icc_get(dev->dev, "mdp0-mem");
-	path1 = of_icc_get(dev->dev, "mdp1-mem");
-
-	if (IS_ERR_OR_NULL(path0))
-		return PTR_ERR_OR_ZERO(path0);
-
-	dpu_kms->path[0] = path0;
-	dpu_kms->num_paths = 1;
-
-	if (!IS_ERR_OR_NULL(path1)) {
-		dpu_kms->path[1] = path1;
-		dpu_kms->num_paths++;
-	}
-	return 0;
-}
-
 static int dpu_kms_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 {
 	return dpu_crtc_vblank(crtc, true);
@@ -994,9 +972,6 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 
 	dpu_vbif_init_memtypes(dpu_kms);
 
-	if (of_device_is_compatible(dev->dev->of_node, "qcom,sc7180-mdss"))
-		dpu_kms_parse_data_bus_icc_path(dpu_kms);
-
 	pm_runtime_put_sync(&dpu_kms->pdev->dev);
 
 	return 0;
@@ -1102,7 +1077,7 @@ static int dpu_dev_remove(struct platform_device *pdev)
 
 static int __maybe_unused dpu_runtime_suspend(struct device *dev)
 {
-	int i, rc = -1;
+	int rc = -1;
 	struct platform_device *pdev = to_platform_device(dev);
 	struct dpu_kms *dpu_kms = platform_get_drvdata(pdev);
 	struct dss_module_power *mp = &dpu_kms->mp;
@@ -1111,9 +1086,6 @@ static int __maybe_unused dpu_runtime_suspend(struct device *dev)
 	if (rc)
 		DPU_ERROR("clock disable failed rc:%d\n", rc);
 
-	for (i = 0; i < dpu_kms->num_paths; i++)
-		icc_set_bw(dpu_kms->path[i], 0, 0);
-
 	return rc;
 }
 
@@ -1125,15 +1097,8 @@ static int __maybe_unused dpu_runtime_resume(struct device *dev)
 	struct drm_encoder *encoder;
 	struct drm_device *ddev;
 	struct dss_module_power *mp = &dpu_kms->mp;
-	int i;
 
 	ddev = dpu_kms->dev;
-
-	/* Min vote of BW is required before turning on AXI clk */
-	for (i = 0; i < dpu_kms->num_paths; i++)
-		icc_set_bw(dpu_kms->path[i], 0,
-			dpu_kms->catalog->perf.min_dram_ib);
-
 	rc = msm_dss_enable_clk(mp->clk_config, mp->num_clk, true);
 	if (rc) {
 		DPU_ERROR("clock enable failed rc:%d\n", rc);

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h

@@ -8,8 +8,6 @@
 #ifndef __DPU_KMS_H__
 #define __DPU_KMS_H__
 
-#include <linux/interconnect.h>
-
 #include <drm/drm_drv.h>
 
 #include "msm_drv.h"
@@ -139,8 +137,6 @@ struct dpu_kms {
 	 * when disabled.
 	 */
 	atomic_t bandwidth_ref;
-	struct icc_path *path[2];
-	u32 num_paths;
 };
 
 struct vsync_info {

drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c

@@ -8,6 +8,7 @@
 #include <linux/irqdesc.h>
 #include <linux/irqchip/chained_irq.h>
 #include "dpu_kms.h"
+#include <linux/interconnect.h>
 
 #define to_dpu_mdss(x) container_of(x, struct dpu_mdss, base)
 
@@ -314,11 +315,9 @@ int dpu_mdss_init(struct drm_device *dev)
 	}
 	dpu_mdss->mmio_len = resource_size(res);
 
-	if (!of_device_is_compatible(dev->dev->of_node, "qcom,sc7180-mdss")) {
-		ret = dpu_mdss_parse_data_bus_icc_path(dev, dpu_mdss);
-		if (ret)
-			return ret;
-	}
+	ret = dpu_mdss_parse_data_bus_icc_path(dev, dpu_mdss);
+	if (ret)
+		return ret;
 
 	mp = &dpu_mdss->mp;
 	ret = msm_dss_parse_clock(pdev, mp);