diff options
Diffstat (limited to 'drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c')
| -rw-r--r-- | drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c index 29e373d2e7b5..7ea90d25a3b6 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) |