Re: [PATCH v3 17/27] drm/msm/dpu: rewrite plane's QoS-related functions to take dpu_sw_pipe and dpu_format

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On 2/3/2023 10:21 AM, Dmitry Baryshkov wrote:
Rewrite dpu_plane's QoS related functions to take struct dpu_sw_pipe and
struct dpu_format as arguments rather than fetching them from the
pstate or drm_framebuffer.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>

Nothing wrong with the change as such but why is this needed?
I looked through tne next patches in the series briefly and unless I am missing something, I am not able to see how this rewrite is helping or needed for the remaining patches.

---
  drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 98 +++++++++++------------
  1 file changed, 47 insertions(+), 51 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 5aabf9694a53..ee261a591d45 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -128,19 +128,18 @@ 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.
- * @fb:   Pointer to framebuffer associated with the given plane
+ * @fmt: Pointer to source buffer format
   * @pipe_cfg: Pointer to pipe configuration
   * 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,
+	const struct dpu_format *fmt,
  	struct dpu_hw_sspp_cfg *pipe_cfg)
  {
  	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;
@@ -152,8 +151,6 @@ static void _dpu_plane_calc_bw(struct drm_plane *plane,
  	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(&pipe_cfg->src_rect);
  	src_height = drm_rect_height(&pipe_cfg->src_rect);
  	dst_height = drm_rect_height(&pipe_cfg->dst_rect);
@@ -217,25 +214,25 @@ static void _dpu_plane_calc_clk(struct drm_plane *plane, struct dpu_hw_sspp_cfg
  /**
   * _dpu_plane_calc_fill_level - calculate fill level of the given source format
   * @plane:		Pointer to drm plane
+ * @pipe:		Pointer to software pipe
   * @fmt:		Pointer to source buffer format
   * @src_width:		width of source buffer
   * Return: fill level corresponding to the source buffer/format or 0 if error
   */
  static int _dpu_plane_calc_fill_level(struct drm_plane *plane,
+		struct dpu_sw_pipe *pipe,
  		const struct dpu_format *fmt, u32 src_width)
  {
  	struct dpu_plane *pdpu;
-	struct dpu_plane_state *pstate;
  	u32 fixed_buff_size;
  	u32 total_fl;
- if (!fmt || !plane->state || !src_width || !fmt->bpp) {
+	if (!fmt || !pipe || !src_width || !fmt->bpp) {
  		DPU_ERROR("invalid arguments\n");
  		return 0;
  	}
pdpu = to_dpu_plane(plane);
-	pstate = to_dpu_plane_state(plane->state);
  	fixed_buff_size = pdpu->catalog->caps->pixel_ram_size;
/* FIXME: in multirect case account for the src_width of all the planes */
@@ -251,7 +248,7 @@ static int _dpu_plane_calc_fill_level(struct drm_plane *plane,
  				((src_width + 32) * fmt->bpp);
  		}
  	} else {
-		if (pstate->pipe.multirect_mode == DPU_SSPP_MULTIRECT_PARALLEL) {
+		if (pipe->multirect_mode == DPU_SSPP_MULTIRECT_PARALLEL) {
  			total_fl = (fixed_buff_size / 2) * 2 /
  				((src_width + 32) * fmt->bpp);
  		} else {
@@ -261,7 +258,7 @@ static int _dpu_plane_calc_fill_level(struct drm_plane *plane,
  	}
DPU_DEBUG_PLANE(pdpu, "pnum:%d fmt: %4.4s w:%u fl:%u\n",
-			pdpu->pipe - SSPP_VIG0,
+			pipe->sspp->idx - SSPP_VIG0,
  			(char *)&fmt->base.pixel_format,
  			src_width, total_fl);
@@ -271,25 +268,22 @@ static int _dpu_plane_calc_fill_level(struct drm_plane *plane,
  /**
   * _dpu_plane_set_qos_lut - set QoS LUT of the given plane
   * @plane:		Pointer to drm plane
- * @fb:			Pointer to framebuffer associated with the given plane
+ * @pipe:		Pointer to software pipe
+ * @fmt:		Pointer to source buffer format
   * @pipe_cfg:		Pointer to pipe configuration
   */
  static void _dpu_plane_set_qos_lut(struct drm_plane *plane,
-		struct drm_framebuffer *fb, struct dpu_hw_sspp_cfg *pipe_cfg)
+		struct dpu_sw_pipe *pipe,
+		const struct dpu_format *fmt, struct dpu_hw_sspp_cfg *pipe_cfg)
  {
  	struct dpu_plane *pdpu = to_dpu_plane(plane);
-	struct dpu_plane_state *pstate = to_dpu_plane_state(plane->state);
-	const struct dpu_format *fmt = NULL;
  	u64 qos_lut;
  	u32 total_fl = 0, lut_usage;
if (!pdpu->is_rt_pipe) {
  		lut_usage = DPU_QOS_LUT_USAGE_NRT;
  	} else {
-		fmt = dpu_get_dpu_format_ext(
-				fb->format->format,
-				fb->modifier);
-		total_fl = _dpu_plane_calc_fill_level(plane, fmt,
+		total_fl = _dpu_plane_calc_fill_level(plane, pipe, fmt,
  				drm_rect_width(&pipe_cfg->src_rect));
if (fmt && DPU_FORMAT_IS_LINEAR(fmt))
@@ -301,7 +295,7 @@ static void _dpu_plane_set_qos_lut(struct drm_plane *plane,
  	qos_lut = _dpu_hw_get_qos_lut(
  			&pdpu->catalog->perf->qos_lut_tbl[lut_usage], total_fl);
- trace_dpu_perf_set_qos_luts(pdpu->pipe - SSPP_VIG0,
+	trace_dpu_perf_set_qos_luts(pipe->sspp->idx - SSPP_VIG0,
  			(fmt) ? fmt->base.pixel_format : 0,
  			pdpu->is_rt_pipe, total_fl, qos_lut, lut_usage);
@@ -310,20 +304,20 @@ static void _dpu_plane_set_qos_lut(struct drm_plane *plane,
  			fmt ? (char *)&fmt->base.pixel_format : NULL,
  			pdpu->is_rt_pipe, total_fl, qos_lut);
- pstate->pipe.sspp->ops.setup_creq_lut(pstate->pipe.sspp, qos_lut);
+	pipe->sspp->ops.setup_creq_lut(pipe->sspp, qos_lut);
  }
/**
   * _dpu_plane_set_danger_lut - set danger/safe LUT of the given plane
   * @plane:		Pointer to drm plane
- * @fb:			Pointer to framebuffer associated with the given plane
+ * @pipe:		Pointer to software pipe
+ * @fmt:		Pointer to source buffer format
   */
  static void _dpu_plane_set_danger_lut(struct drm_plane *plane,
-		struct drm_framebuffer *fb)
+		struct dpu_sw_pipe *pipe,
+		const struct dpu_format *fmt)
  {
  	struct dpu_plane *pdpu = to_dpu_plane(plane);
-	struct dpu_plane_state *pstate = to_dpu_plane_state(plane->state);
-	const struct dpu_format *fmt = NULL;
  	u32 danger_lut, safe_lut;
if (!pdpu->is_rt_pipe) {
@@ -332,10 +326,6 @@ static void _dpu_plane_set_danger_lut(struct drm_plane *plane,
  		safe_lut = pdpu->catalog->perf->safe_lut_tbl
  				[DPU_QOS_LUT_USAGE_NRT];
  	} else {
-		fmt = dpu_get_dpu_format_ext(
-				fb->format->format,
-				fb->modifier);
-
  		if (fmt && DPU_FORMAT_IS_LINEAR(fmt)) {
  			danger_lut = pdpu->catalog->perf->danger_lut_tbl
  					[DPU_QOS_LUT_USAGE_LINEAR];
@@ -362,29 +352,30 @@ static void _dpu_plane_set_danger_lut(struct drm_plane *plane,
  		danger_lut,
  		safe_lut);
- pstate->pipe.sspp->ops.setup_danger_safe_lut(pstate->pipe.sspp,
+	pipe->sspp->ops.setup_danger_safe_lut(pipe->sspp,
  			danger_lut, safe_lut);
  }
/**
   * _dpu_plane_set_qos_ctrl - set QoS control of the given plane
   * @plane:		Pointer to drm plane
+ * @pipe:		Pointer to software pipe
   * @enable:		true to enable QoS control
   * @flags:		QoS control mode (enum dpu_plane_qos)
   */
  static void _dpu_plane_set_qos_ctrl(struct drm_plane *plane,
+	struct dpu_sw_pipe *pipe,
  	bool enable, u32 flags)
  {
  	struct dpu_plane *pdpu = to_dpu_plane(plane);
-	struct dpu_plane_state *pstate = to_dpu_plane_state(plane->state);
  	struct dpu_hw_pipe_qos_cfg pipe_qos_cfg;
memset(&pipe_qos_cfg, 0, sizeof(pipe_qos_cfg)); if (flags & DPU_PLANE_QOS_VBLANK_CTRL) {
-		pipe_qos_cfg.creq_vblank = pstate->pipe.sspp->cap->sblk->creq_vblank;
+		pipe_qos_cfg.creq_vblank = pipe->sspp->cap->sblk->creq_vblank;
  		pipe_qos_cfg.danger_vblank =
-				pstate->pipe.sspp->cap->sblk->danger_vblank;
+				pipe->sspp->cap->sblk->danger_vblank;
  		pipe_qos_cfg.vblank_en = enable;
  	}
@@ -410,33 +401,34 @@ static void _dpu_plane_set_qos_ctrl(struct drm_plane *plane,
  		pipe_qos_cfg.danger_vblank,
  		pdpu->is_rt_pipe);
- pstate->pipe.sspp->ops.setup_qos_ctrl(pstate->pipe.sspp,
+	pipe->sspp->ops.setup_qos_ctrl(pipe->sspp,
  			&pipe_qos_cfg);
  }
/**
   * _dpu_plane_set_ot_limit - set OT limit for the given plane
   * @plane:		Pointer to drm plane
+ * @pipe:		Pointer to software pipe
   * @crtc:		Pointer to drm crtc
   * @pipe_cfg:		Pointer to pipe configuration
   */
  static void _dpu_plane_set_ot_limit(struct drm_plane *plane,
+		struct dpu_sw_pipe *pipe,
  		struct drm_crtc *crtc, struct dpu_hw_sspp_cfg *pipe_cfg)
  {
  	struct dpu_plane *pdpu = to_dpu_plane(plane);
-	struct dpu_plane_state *pstate = to_dpu_plane_state(plane->state);
  	struct dpu_vbif_set_ot_params ot_params;
  	struct dpu_kms *dpu_kms = _dpu_plane_get_kms(plane);
memset(&ot_params, 0, sizeof(ot_params));
-	ot_params.xin_id = pstate->pipe.sspp->cap->xin_id;
-	ot_params.num = pstate->pipe.sspp->idx - SSPP_NONE;
+	ot_params.xin_id = pipe->sspp->cap->xin_id;
+	ot_params.num = pipe->sspp->idx - SSPP_NONE;
  	ot_params.width = drm_rect_width(&pipe_cfg->src_rect);
  	ot_params.height = drm_rect_height(&pipe_cfg->src_rect);
  	ot_params.is_wfd = !pdpu->is_rt_pipe;
  	ot_params.frame_rate = drm_mode_vrefresh(&crtc->mode);
  	ot_params.vbif_idx = VBIF_RT;
-	ot_params.clk_ctrl = pstate->pipe.sspp->cap->clk_ctrl;
+	ot_params.clk_ctrl = pipe->sspp->cap->clk_ctrl;
  	ot_params.rd = true;
dpu_vbif_set_ot_limit(dpu_kms, &ot_params);
@@ -445,19 +437,20 @@ static void _dpu_plane_set_ot_limit(struct drm_plane *plane,
  /**
   * _dpu_plane_set_qos_remap - set vbif QoS for the given plane
   * @plane:		Pointer to drm plane
+ * @pipe:		Pointer to software pipe
   */
-static void _dpu_plane_set_qos_remap(struct drm_plane *plane)
+static void _dpu_plane_set_qos_remap(struct drm_plane *plane,
+		struct dpu_sw_pipe *pipe)
  {
  	struct dpu_plane *pdpu = to_dpu_plane(plane);
-	struct dpu_plane_state *pstate = to_dpu_plane_state(plane->state);
  	struct dpu_vbif_set_qos_params qos_params;
  	struct dpu_kms *dpu_kms = _dpu_plane_get_kms(plane);
memset(&qos_params, 0, sizeof(qos_params));
  	qos_params.vbif_idx = VBIF_RT;
-	qos_params.clk_ctrl = pstate->pipe.sspp->cap->clk_ctrl;
-	qos_params.xin_id = pstate->pipe.sspp->cap->xin_id;
-	qos_params.num = pstate->pipe.sspp->idx - SSPP_VIG0;
+	qos_params.clk_ctrl = pipe->sspp->cap->clk_ctrl;
+	qos_params.xin_id = pipe->sspp->cap->xin_id;
+	qos_params.num = pipe->sspp->idx - SSPP_VIG0;
  	qos_params.is_rt = pdpu->is_rt_pipe;
DPU_DEBUG_PLANE(pdpu, "pipe:%d vbif:%d xin:%d rt:%d, clk_ctrl:%d\n",
@@ -1144,7 +1137,7 @@ static void dpu_plane_sspp_atomic_update(struct drm_plane *plane)
  	pstate->needs_qos_remap |= (is_rt_pipe != pdpu->is_rt_pipe);
  	pdpu->is_rt_pipe = is_rt_pipe;
- _dpu_plane_set_qos_ctrl(plane, false, DPU_PLANE_QOS_PANIC_CTRL);
+	_dpu_plane_set_qos_ctrl(plane, pipe, false, DPU_PLANE_QOS_PANIC_CTRL);
DPU_DEBUG_PLANE(pdpu, "FB[%u] " DRM_RECT_FP_FMT "->crtc%u " DRM_RECT_FMT
  			", %4.4s ubwc %d\n", fb->base.id, DRM_RECT_FP_ARG(&state->src),
@@ -1213,20 +1206,20 @@ static void dpu_plane_sspp_atomic_update(struct drm_plane *plane)
  		}
  	}
- _dpu_plane_set_qos_lut(plane, fb, &pipe_cfg);
-	_dpu_plane_set_danger_lut(plane, fb);
+	_dpu_plane_set_qos_lut(plane, pipe, fmt, &pipe_cfg);
+	_dpu_plane_set_danger_lut(plane, pipe, fmt);
if (plane->type != DRM_PLANE_TYPE_CURSOR) {
-		_dpu_plane_set_qos_ctrl(plane, true, DPU_PLANE_QOS_PANIC_CTRL);
-		_dpu_plane_set_ot_limit(plane, crtc, &pipe_cfg);
+		_dpu_plane_set_qos_ctrl(plane, pipe, true, DPU_PLANE_QOS_PANIC_CTRL);
+		_dpu_plane_set_ot_limit(plane, pipe, crtc, &pipe_cfg);
  	}
if (pstate->needs_qos_remap) {
  		pstate->needs_qos_remap = false;
-		_dpu_plane_set_qos_remap(plane);
+		_dpu_plane_set_qos_remap(plane, pipe);
  	}
- _dpu_plane_calc_bw(plane, fb, &pipe_cfg);
+	_dpu_plane_calc_bw(plane, fmt, &pipe_cfg);
_dpu_plane_calc_clk(plane, &pipe_cfg);
  }
@@ -1263,11 +1256,13 @@ static void dpu_plane_atomic_update(struct drm_plane *plane,
  static void dpu_plane_destroy(struct drm_plane *plane)
  {
  	struct dpu_plane *pdpu = plane ? to_dpu_plane(plane) : NULL;
+	struct dpu_plane_state *pstate;
DPU_DEBUG_PLANE(pdpu, "\n"); if (pdpu) {
-		_dpu_plane_set_qos_ctrl(plane, false, DPU_PLANE_QOS_PANIC_CTRL);
+		pstate = to_dpu_plane_state(plane->state);
+		_dpu_plane_set_qos_ctrl(plane, &pstate->pipe, false, DPU_PLANE_QOS_PANIC_CTRL);
mutex_destroy(&pdpu->lock); @@ -1395,13 +1390,14 @@ static void dpu_plane_reset(struct drm_plane *plane)
  void dpu_plane_danger_signal_ctrl(struct drm_plane *plane, bool enable)
  {
  	struct dpu_plane *pdpu = to_dpu_plane(plane);
+	struct dpu_plane_state *pstate = to_dpu_plane_state(plane->state);
  	struct dpu_kms *dpu_kms = _dpu_plane_get_kms(plane);
if (!pdpu->is_rt_pipe)
  		return;
pm_runtime_get_sync(&dpu_kms->pdev->dev);
-	_dpu_plane_set_qos_ctrl(plane, enable, DPU_PLANE_QOS_PANIC_CTRL);
+	_dpu_plane_set_qos_ctrl(plane, &pstate->pipe, enable, DPU_PLANE_QOS_PANIC_CTRL);
  	pm_runtime_put_sync(&dpu_kms->pdev->dev);
  }
  #endif



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