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Message-ID: <CAF6AEGvibErbc-VJWvp9kRz_PwLaBLcfw4xjABwZwh6vg9BbKQ@mail.gmail.com>
Date: Mon, 13 Jul 2020 10:20:31 -0700
From: Rob Clark <robdclark@...il.com>
To: Kalyan Thota <kalyan_t@...eaurora.org>
Cc: "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@...r.kernel.org>,
Krishna Manikandan <mkrishn@...eaurora.org>,
linux-arm-msm <linux-arm-msm@...r.kernel.org>,
Raviteja Tamatam <travitej@...eaurora.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
dri-devel <dri-devel@...ts.freedesktop.org>,
Douglas Anderson <dianders@...omium.org>,
nganji@...eaurora.org, Sean Paul <seanpaul@...omium.org>,
"Kristian H. Kristensen" <hoegsberg@...omium.org>,
freedreno <freedreno@...ts.freedesktop.org>
Subject: Re: [Freedreno] [v1] drm/msm/dpu: add support for clk and bw scaling
for display
On Mon, Jul 13, 2020 at 8:59 AM <kalyan_t@...eaurora.org> wrote:
>
> On 2020-07-10 22:38, Rob Clark wrote:
> > On Thu, Jun 18, 2020 at 7:09 AM Kalyan Thota <kalyan_t@...eaurora.org>
> > wrote:
> >>
> >> This change adds support to scale src clk and bandwidth as
> >> per composition requirements.
> >>
> >> Interconnect registration for bw has been moved to mdp
> >> device node from mdss to facilitate the scaling.
> >>
> >> Changes in v1:
> >> - Address armv7 compilation issues with the patch (Rob)
> >>
> >> Signed-off-by: Kalyan Thota <kalyan_t@...eaurora.org>
> >> ---
> >> drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c | 109
> >> +++++++++++++++++++++----
> >> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 5 +-
> >> drivers/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 | 84
> >> +++++++++++++++++++
> >> drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h | 4 +
> >> 8 files changed, 233 insertions(+), 23 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 7c230f7..e52bc44 100644
> >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
> >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
> >> @@ -29,6 +29,74 @@ 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 *= bw_factor;
> >> + do_div(crtc_plane_bw, 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 *= clk_factor;
> >> + do_div(crtc_clk, 100);
> >> + }
> >> +
> >> + return crtc_clk;
> >> +}
> >> +
> >> static struct dpu_kms *_dpu_crtc_get_kms(struct drm_crtc *crtc)
> >> {
> >> struct msm_drm_private *priv;
> >> @@ -51,12 +119,7 @@ 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 (!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)
> >> {
> >> + 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;
> >> @@ -64,6 +127,10 @@ 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(
> >> @@ -115,11 +182,7 @@ 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;
> >> }
> >>
> >> @@ -131,9 +194,7 @@ int dpu_core_perf_crtc_check(struct drm_crtc
> >> *crtc,
> >>
> >> DPU_DEBUG("final threshold bw limit = %d\n",
> >> threshold);
> >>
> >> - if (!dpu_cstate->bw_control) {
> >> - DPU_DEBUG("bypass bandwidth check\n");
> >> - } else if (!threshold) {
> >> + if (!threshold) {
> >> DPU_ERROR("no bandwidth limits specified\n");
> >> return -E2BIG;
> >> } else if (bw > threshold) {
> >> @@ -154,7 +215,11 @@ 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 ret = 0;
> >> + int i, ret = 0;
> >> + u64 avg_bw;
> >> +
> >> + if (!kms->num_paths)
> >> + return -EINVAL;
> >>
> >> drm_for_each_crtc(tmp_crtc, crtc->dev) {
> >> if (tmp_crtc->enabled &&
> >> @@ -165,10 +230,20 @@ 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);
> >>
> >> - DPU_DEBUG("crtc=%d bw=%llu\n",
> >> tmp_crtc->base.id,
> >> - dpu_cstate->new_perf.bw_ctl);
> >> + 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);
> >> }
> >> }
> >> +
> >> + avg_bw = perf.bw_ctl;
> >> + do_div(avg_bw, (kms->num_paths * 1000)); /*Bps_to_icc*/
> >> +
> >> + for (i = 0; i < kms->num_paths; i++)
> >> + icc_set_bw(kms->path[i], 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 29d4fde..8f2357d 100644
> >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
> >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
> >> @@ -541,7 +541,8 @@
> >> .max_bw_high = 6800000,
> >> .min_core_ib = 2400000,
> >> .min_llcc_ib = 800000,
> >> - .min_dram_ib = 800000,
> >> + .min_dram_ib = 1600000,
> >> + .min_prefill_lines = 24,
> >> .danger_lut_tbl = {0xff, 0xffff, 0x0},
> >> .qos_lut_tbl = {
> >> {.nentry = ARRAY_SIZE(sc7180_qos_linear),
> >> @@ -558,6 +559,8 @@
> >> {.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 f7de438..f2a5fe2 100644
> >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> >> @@ -651,6 +651,8 @@ 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
> >> @@ -675,6 +677,8 @@ 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 b8615d4..a5da7aa 100644
> >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> >> @@ -303,6 +303,28 @@ 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;
> >> +}
> >
> >
> > so wait, why do we need a 2nd nearly identical copy of
> > dpu_mdss_parse_data_bus_icc_path() for sc7180? And tracking of the
> > path in dpu_mdss for some gens and dpu_kms in other gens?
> >
> > (I have a suspicion that the answer is dpu has too much indirection
> > and abstraction.)
> >
> > BR,
> > -R
> Hi Rob,
>
> If you could remember, we have discussed this earlier. We don't want to
> change the way interconnects are defined in the DT.
> but since the change is about scaling the BW as per composition cycle,
> icc paths are needed to be available for MDP node in the kms structure
Right, we don't want to change the bindings.. but I think we could
just move the icc paths to dpu_kms in both cases, and not have this
duplication?
> In summary behavior will be as follows
>
> 1) if icc paths are enumerated at dpu_mdss then BW vote will be once
> during power up. ( for cheza )
>
> 2) if icc paths are enumerated at dpu_kms then BW vote will scale on
> every commit. ( for Trogdor )
If we move it all to dpu_kms, we could decide on dynamic vs static
vote based on whether the necessary parameters (inefficiency_factors,
etc) are set in the hwcatalog.
That said, I would kinda like to enable bw scaling on 845 as well at
some point. I assume the logic should all be the same, other than the
hwcatalog values. If they are called roughly the same thing in the
android kernel, I could probably figure out the values and test this
on my sdm850 laptop.
BR,
-R
>
> >
> >> +
> >> static int dpu_kms_enable_vblank(struct msm_kms *kms, struct drm_crtc
> >> *crtc)
> >> {
> >> return dpu_crtc_vblank(crtc, true);
> >> @@ -972,6 +994,9 @@ 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;
> >> @@ -1077,7 +1102,7 @@ static int dpu_dev_remove(struct platform_device
> >> *pdev)
> >>
> >> static int __maybe_unused dpu_runtime_suspend(struct device *dev)
> >> {
> >> - int rc = -1;
> >> + int i, 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;
> >> @@ -1086,6 +1111,9 @@ 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;
> >> }
> >>
> >> @@ -1097,8 +1125,15 @@ 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 4e32d04..94410ca 100644
> >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
> >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
> >> @@ -8,6 +8,8 @@
> >> #ifndef __DPU_KMS_H__
> >> #define __DPU_KMS_H__
> >>
> >> +#include <linux/interconnect.h>
> >> +
> >> #include <drm/drm_drv.h>
> >>
> >> #include "msm_drv.h"
> >> @@ -137,6 +139,8 @@ 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 80d3cfc..df0a983 100644
> >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
> >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
> >> @@ -8,7 +8,6 @@
> >> #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)
> >>
> >> @@ -315,9 +314,11 @@ int dpu_mdss_init(struct drm_device *dev)
> >> }
> >> dpu_mdss->mmio_len = resource_size(res);
> >>
> >> - ret = dpu_mdss_parse_data_bus_icc_path(dev, dpu_mdss);
> >> - if (ret)
> >> - return ret;
> >> + 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;
> >> + }
> >>
> >> 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 3b9c33e..6379fe1 100644
> >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> >> @@ -132,6 +132,86 @@ static struct dpu_kms *_dpu_plane_get_kms(struct
> >> drm_plane *plane)
> >> }
> >>
> >> /**
> >> + * _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;
> >> + u64 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 * mode->vtotal;
> >> +
> >> + do_div(plane_prefill_bw, (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 *= src_height;
> >> + do_div(pstate->plane_clk, dst_height);
> >> + }
> >> +}
> >> +
> >> +/**
> >> * _dpu_plane_calc_fill_level - calculate fill level of the given
> >> source format
> >> * @plane: Pointer to drm plane
> >> * @fmt: Pointer to source buffer format
> >> @@ -1102,6 +1182,10 @@ 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 4569497..ca83b87 100644
> >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h
> >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h
> >> @@ -25,6 +25,8 @@
> >> * @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;
> >> @@ -39,6 +41,8 @@ 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;
> >> };
> >>
> >> /**
> >> --
> >> 1.9.1
> >>
> > _______________________________________________
> > Freedreno mailing list
> > Freedreno@...ts.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/freedreno
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