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

From: Rob Clark
Date: Mon Jun 01 2020 - 23:58:12 EST

From: Rob Clark <robdclark@xxxxxxxxxxxx>

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

This reverts commit 04d9044f6c577948609c03b4e33b8fbc8b87c4b1.

Cc: Kalyan Thota <kalyan_t@xxxxxxxxxxxxxx>
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c | 106 +++---------------
.../gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 5 +-
.../gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 4 -
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 37 +-----
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h | 4 -
drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c | 9 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 82 --------------
drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h | 4 -
8 files changed, 23 insertions(+), 228 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 9697abcbec3f..7c230f719ad3 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
+++ b/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;
@@ -118,7 +51,12 @@ 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;
@@ -126,10 +64,6 @@ static void _dpu_core_perf_calc_crtc(struct dpu_kms *kms,
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;
}

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
index 8f2357d9960a..29d4fde3172b 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
+++ b/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,
};

/*************************************************************
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
index f2a5fe2d9d62..f7de43838c69 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
+++ b/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];
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index a5da7aacddba..b8615d4fe8a3 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/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);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
index 94410ca9bd70..4e32d040f1e6 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
+++ b/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 {
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
index df0a9835bfb1..80d3cfc14007 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
+++ b/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);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index c2a6e3dacd68..3b9c33e694bf 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -131,84 +131,6 @@ static struct dpu_kms *_dpu_plane_get_kms(struct drm_plane *plane)
return to_dpu_kms(priv->kms);
}

-/**
- * _dpu_plane_calc_bw - calculate bandwidth required for a plane
- * @Plane: Pointer to drm plane.
- * Result: Updates calculated bandwidth in the plane state.
- * BW Equation: src_w * src_h * bpp * fps * (v_total / v_dest)
- * Prefill BW Equation: line src bytes * line_time
- */
-static void _dpu_plane_calc_bw(struct drm_plane *plane,
- struct drm_framebuffer *fb)
-{
- struct dpu_plane *pdpu = to_dpu_plane(plane);
- struct dpu_plane_state *pstate;
- struct drm_display_mode *mode;
- const struct dpu_format *fmt = NULL;
- struct dpu_kms *dpu_kms = _dpu_plane_get_kms(plane);
- int src_width, src_height, dst_height, fps;
- u64 plane_prefill_bw;
- u64 plane_bw;
- u32 hw_latency_lines;
- u32 scale_factor;
- int vbp, vpw;
-
- pstate = to_dpu_plane_state(plane->state);
- mode = &plane->state->crtc->mode;
-
- fmt = dpu_get_dpu_format_ext(fb->format->format, fb->modifier);
-
- src_width = drm_rect_width(&pdpu->pipe_cfg.src_rect);
- src_height = drm_rect_height(&pdpu->pipe_cfg.src_rect);
- dst_height = drm_rect_height(&pdpu->pipe_cfg.dst_rect);
- fps = drm_mode_vrefresh(mode);
- vbp = mode->vtotal - mode->vsync_end;
- vpw = mode->vsync_end - mode->vsync_start;
- hw_latency_lines = dpu_kms->catalog->perf.min_prefill_lines;
- scale_factor = src_height > dst_height ?
- mult_frac(src_height, 1, dst_height) : 1;
-
- plane_bw =
- src_width * mode->vtotal * fps * fmt->bpp * scale_factor;
-
- plane_prefill_bw =
- src_width * hw_latency_lines * fps * fmt->bpp * scale_factor;
-
- plane_prefill_bw = mult_frac(plane_prefill_bw, mode->vtotal, (vbp+vpw));
-
- pstate->plane_fetch_bw = max(plane_bw, plane_prefill_bw);
-}
-
-
-/**
- * _dpu_plane_calc_clk - calculate clock required for a plane
- * @Plane: Pointer to drm plane.
- * Result: Updates calculated clock in the plane state.
- * Clock equation: dst_w * v_total * fps * (src_h / dst_h)
- */
-static void _dpu_plane_calc_clk(struct drm_plane *plane)
-{
- struct dpu_plane *pdpu = to_dpu_plane(plane);
- struct dpu_plane_state *pstate;
- struct drm_display_mode *mode;
- int dst_width, src_height, dst_height, fps;
-
- pstate = to_dpu_plane_state(plane->state);
- mode = &plane->state->crtc->mode;
-
- src_height = drm_rect_height(&pdpu->pipe_cfg.src_rect);
- dst_width = drm_rect_width(&pdpu->pipe_cfg.dst_rect);
- dst_height = drm_rect_height(&pdpu->pipe_cfg.dst_rect);
- fps = drm_mode_vrefresh(mode);
-
- pstate->plane_clk =
- dst_width * mode->vtotal * fps;
-
- if (src_height > dst_height)
- pstate->plane_clk = mult_frac(pstate->plane_clk,
- src_height, dst_height);
-}
-
/**
* _dpu_plane_calc_fill_level - calculate fill level of the given source format
* @plane: Pointer to drm plane
@@ -1180,10 +1102,6 @@ static void dpu_plane_sspp_atomic_update(struct drm_plane *plane)
}

_dpu_plane_set_qos_remap(plane);
-
- _dpu_plane_calc_bw(plane, fb);
-
- _dpu_plane_calc_clk(plane);
}

static void _dpu_plane_atomic_disable(struct drm_plane *plane)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h
index ca83b8753d59..456949713e90 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h
@@ -25,8 +25,6 @@
* @scaler3_cfg: configuration data for scaler3
* @pixel_ext: configuration data for pixel extensions
* @cdp_cfg: CDP configuration
- * @plane_fetch_bw: calculated BW per plane
- * @plane_clk: calculated clk per plane
*/
struct dpu_plane_state {
struct drm_plane_state base;
@@ -41,8 +39,6 @@ struct dpu_plane_state {
struct dpu_hw_pixel_ext pixel_ext;

struct dpu_hw_pipe_cdp_cfg cdp_cfg;
- u64 plane_fetch_bw;
- u64 plane_clk;
};

/**
--
2.25.4