drm/msm/dpu: add support for wide planes

It is possible to use multirect feature and split source to use the SSPP
to output two consecutive rectangles. This commit brings in this
capability to support wider screen resolutions.

Tested-by: Abhinav Kumar <quic_abhinavk@quicinc.com> # sc7280
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/527358/
Link: https://lore.kernel.org/r/20230316161653.4106395-28-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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

@@ -481,6 +481,15 @@ static void _dpu_crtc_blend_setup_mixer(struct drm_crtc *crtc,
 					   format, fb ? fb->modifier : 0,
 					   &pstate->pipe, 0, stage_cfg);
 
+		if (pstate->r_pipe.sspp) {
+			set_bit(pstate->r_pipe.sspp->idx, fetch_active);
+			_dpu_crtc_blend_setup_pipe(crtc, plane,
+						   mixer, cstate->num_mixers,
+						   pstate->stage,
+						   format, fb ? fb->modifier : 0,
+						   &pstate->r_pipe, 1, stage_cfg);
+		}
+
 		/* blend config update */
 		for (lm_idx = 0; lm_idx < cstate->num_mixers; lm_idx++) {
 			_dpu_crtc_setup_blend_cfg(mixer + lm_idx, pstate, format);
@@ -1341,10 +1350,16 @@ static int _dpu_debugfs_status_show(struct seq_file *s, void *data)
 		seq_printf(s, "\tdst x:%4d dst_y:%4d dst_w:%4d dst_h:%4d\n",
 			state->crtc_x, state->crtc_y, state->crtc_w,
 			state->crtc_h);
-		seq_printf(s, "\tsspp:%s\n",
+		seq_printf(s, "\tsspp[0]:%s\n",
 			   pstate->pipe.sspp->cap->name);
-		seq_printf(s, "\tmultirect: mode: %d index: %d\n",
+		seq_printf(s, "\tmultirect[0]: mode: %d index: %d\n",
 			pstate->pipe.multirect_mode, pstate->pipe.multirect_index);
+		if (pstate->r_pipe.sspp) {
+			seq_printf(s, "\tsspp[1]:%s\n",
+				   pstate->r_pipe.sspp->cap->name);
+			seq_printf(s, "\tmultirect[1]: mode: %d index: %d\n",
+				   pstate->r_pipe.multirect_mode, pstate->r_pipe.multirect_index);
+		}
 
 		seq_puts(s, "\n");
 	}

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

@@ -702,6 +702,10 @@ static void _dpu_plane_color_fill(struct dpu_plane *pdpu,
 	/* update sspp */
 	_dpu_plane_color_fill_pipe(pstate, &pstate->pipe, &pstate->pipe_cfg.dst_rect,
 				   fill_color, fmt);
+
+	if (pstate->r_pipe.sspp)
+		_dpu_plane_color_fill_pipe(pstate, &pstate->r_pipe, &pstate->r_pipe_cfg.dst_rect,
+					   fill_color, fmt);
 }
 
 int dpu_plane_validate_multirect_v2(struct dpu_multirect_plane_states *plane)
@@ -960,9 +964,12 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 	int ret = 0, min_scale;
 	struct dpu_plane *pdpu = to_dpu_plane(plane);
 	struct dpu_plane_state *pstate = to_dpu_plane_state(new_plane_state);
+	struct dpu_sw_pipe *pipe = &pstate->pipe;
+	struct dpu_sw_pipe *r_pipe = &pstate->r_pipe;
 	const struct drm_crtc_state *crtc_state = NULL;
 	const struct dpu_format *fmt;
 	struct dpu_sw_pipe_cfg *pipe_cfg = &pstate->pipe_cfg;
+	struct dpu_sw_pipe_cfg *r_pipe_cfg = &pstate->r_pipe_cfg;
 	struct drm_rect fb_rect = { 0 };
 	uint32_t max_linewidth;
 	unsigned int rotation;
@@ -986,8 +993,11 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 	if (!new_plane_state->visible)
 		return 0;
 
-	pstate->pipe.multirect_index = DPU_SSPP_RECT_SOLO;
-	pstate->pipe.multirect_mode = DPU_SSPP_MULTIRECT_NONE;
+	pipe->multirect_index = DPU_SSPP_RECT_SOLO;
+	pipe->multirect_mode = DPU_SSPP_MULTIRECT_NONE;
+	r_pipe->multirect_index = DPU_SSPP_RECT_SOLO;
+	r_pipe->multirect_mode = DPU_SSPP_MULTIRECT_NONE;
+	r_pipe->sspp = NULL;
 
 	pstate->stage = DPU_STAGE_0 + pstate->base.normalized_zpos;
 	if (pstate->stage >= pdpu->catalog->caps->max_mixer_blendstages) {
@@ -1017,21 +1027,67 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 		return -E2BIG;
 	}
 
+	fmt = to_dpu_format(msm_framebuffer_format(new_plane_state->fb));
+
 	max_linewidth = pdpu->catalog->caps->max_linewidth;
 
-	/* check decimated source width */
 	if (drm_rect_width(&pipe_cfg->src_rect) > max_linewidth) {
-		DPU_DEBUG_PLANE(pdpu, "invalid src " DRM_RECT_FMT " line:%u\n",
-				DRM_RECT_ARG(&pipe_cfg->src_rect), max_linewidth);
-		return -E2BIG;
-	}
+		/*
+		 * In parallel multirect case only the half of the usual width
+		 * is supported for tiled formats. If we are here, we know that
+		 * full width is more than max_linewidth, thus each rect is
+		 * wider than allowed.
+		 */
+		if (DPU_FORMAT_IS_UBWC(fmt)) {
+			DPU_DEBUG_PLANE(pdpu, "invalid src " DRM_RECT_FMT " line:%u, tiled format\n",
+					DRM_RECT_ARG(&pipe_cfg->src_rect), max_linewidth);
+			return -E2BIG;
+		}
 
-	fmt = to_dpu_format(msm_framebuffer_format(new_plane_state->fb));
+		if (drm_rect_width(&pipe_cfg->src_rect) > 2 * max_linewidth) {
+			DPU_DEBUG_PLANE(pdpu, "invalid src " DRM_RECT_FMT " line:%u\n",
+					DRM_RECT_ARG(&pipe_cfg->src_rect), max_linewidth);
+			return -E2BIG;
+		}
 
-	ret = dpu_plane_atomic_check_pipe(pdpu, &pstate->pipe, pipe_cfg, fmt);
+		if (drm_rect_width(&pipe_cfg->src_rect) != drm_rect_width(&pipe_cfg->dst_rect) ||
+		    drm_rect_height(&pipe_cfg->src_rect) != drm_rect_height(&pipe_cfg->dst_rect) ||
+		    (!test_bit(DPU_SSPP_SMART_DMA_V1, &pipe->sspp->cap->features) &&
+		     !test_bit(DPU_SSPP_SMART_DMA_V2, &pipe->sspp->cap->features)) ||
+		    DPU_FORMAT_IS_YUV(fmt)) {
+			DPU_DEBUG_PLANE(pdpu, "invalid src " DRM_RECT_FMT " line:%u, can't use split source\n",
+					DRM_RECT_ARG(&pipe_cfg->src_rect), max_linewidth);
+			return -E2BIG;
+		}
+
+		/*
+		 * Use multirect for wide plane. We do not support dynamic
+		 * assignment of SSPPs, so we know the configuration.
+		 */
+		pipe->multirect_index = DPU_SSPP_RECT_0;
+		pipe->multirect_mode = DPU_SSPP_MULTIRECT_PARALLEL;
+
+		r_pipe->sspp = pipe->sspp;
+		r_pipe->multirect_index = DPU_SSPP_RECT_1;
+		r_pipe->multirect_mode = DPU_SSPP_MULTIRECT_PARALLEL;
+
+		*r_pipe_cfg = *pipe_cfg;
+		pipe_cfg->src_rect.x2 = (pipe_cfg->src_rect.x1 + pipe_cfg->src_rect.x2) >> 1;
+		pipe_cfg->dst_rect.x2 = (pipe_cfg->dst_rect.x1 + pipe_cfg->dst_rect.x2) >> 1;
+		r_pipe_cfg->src_rect.x1 = pipe_cfg->src_rect.x2;
+		r_pipe_cfg->dst_rect.x1 = pipe_cfg->dst_rect.x2;
+	}
+
+	ret = dpu_plane_atomic_check_pipe(pdpu, pipe, pipe_cfg, fmt);
 	if (ret)
 		return ret;
 
+	if (r_pipe->sspp) {
+		ret = dpu_plane_atomic_check_pipe(pdpu, r_pipe, r_pipe_cfg, fmt);
+		if (ret)
+			return ret;
+	}
+
 	supported_rotations = DRM_MODE_REFLECT_MASK | DRM_MODE_ROTATE_0;
 
 	if (pipe_hw_caps->features & BIT(DPU_SSPP_INLINE_ROTATION))
@@ -1098,8 +1154,10 @@ void dpu_plane_flush(struct drm_plane *plane)
 	else if (pdpu->color_fill & DPU_PLANE_COLOR_FILL_FLAG)
 		/* force 100% alpha */
 		_dpu_plane_color_fill(pdpu, pdpu->color_fill, 0xFF);
-	else
+	else {
 		dpu_plane_flush_csc(pdpu, &pstate->pipe);
+		dpu_plane_flush_csc(pdpu, &pstate->r_pipe);
+	}
 
 	/* flag h/w flush complete */
 	if (plane->state)
@@ -1211,13 +1269,14 @@ static void dpu_plane_sspp_atomic_update(struct drm_plane *plane)
 	struct drm_plane_state *state = plane->state;
 	struct dpu_plane_state *pstate = to_dpu_plane_state(state);
 	struct dpu_sw_pipe *pipe = &pstate->pipe;
+	struct dpu_sw_pipe *r_pipe = &pstate->r_pipe;
 	struct drm_crtc *crtc = state->crtc;
 	struct drm_framebuffer *fb = state->fb;
 	bool is_rt_pipe;
 	const struct dpu_format *fmt =
 		to_dpu_format(msm_framebuffer_format(fb));
 	struct dpu_sw_pipe_cfg *pipe_cfg = &pstate->pipe_cfg;
-
+	struct dpu_sw_pipe_cfg *r_pipe_cfg = &pstate->r_pipe_cfg;
 	struct dpu_kms *kms = _dpu_plane_get_kms(&pdpu->base);
 	struct msm_gem_address_space *aspace = kms->base.aspace;
 	struct dpu_hw_fmt_layout layout;
@@ -1245,6 +1304,12 @@ static void dpu_plane_sspp_atomic_update(struct drm_plane *plane)
 				   drm_mode_vrefresh(&crtc->mode),
 				   layout_valid ? &layout : NULL);
 
+	if (r_pipe->sspp) {
+		dpu_plane_sspp_update_pipe(plane, r_pipe, r_pipe_cfg, fmt,
+					   drm_mode_vrefresh(&crtc->mode),
+					   layout_valid ? &layout : NULL);
+	}
+
 	if (pstate->needs_qos_remap)
 		pstate->needs_qos_remap = false;
 
@@ -1252,16 +1317,31 @@ static void dpu_plane_sspp_atomic_update(struct drm_plane *plane)
 						    &crtc->mode, pipe_cfg);
 
 	pstate->plane_clk = _dpu_plane_calc_clk(&crtc->mode, pipe_cfg);
+
+	if (r_pipe->sspp) {
+		pstate->plane_fetch_bw += _dpu_plane_calc_bw(pdpu->catalog, fmt, &crtc->mode, r_pipe_cfg);
+
+		pstate->plane_clk = max(pstate->plane_clk, _dpu_plane_calc_clk(&crtc->mode, r_pipe_cfg));
+	}
 }
 
 static void _dpu_plane_atomic_disable(struct drm_plane *plane)
 {
 	struct drm_plane_state *state = plane->state;
 	struct dpu_plane_state *pstate = to_dpu_plane_state(state);
+	struct dpu_sw_pipe *r_pipe = &pstate->r_pipe;
 
 	trace_dpu_plane_disable(DRMID(plane), false,
 				pstate->pipe.multirect_mode);
 
+	if (r_pipe->sspp) {
+		r_pipe->multirect_index = DPU_SSPP_RECT_SOLO;
+		r_pipe->multirect_mode = DPU_SSPP_MULTIRECT_NONE;
+
+		if (r_pipe->sspp->ops.setup_multirect)
+			r_pipe->sspp->ops.setup_multirect(r_pipe);
+	}
+
 	pstate->pending = true;
 }
 
@@ -1294,6 +1374,9 @@ static void dpu_plane_destroy(struct drm_plane *plane)
 		pstate = to_dpu_plane_state(plane->state);
 		_dpu_plane_set_qos_ctrl(plane, &pstate->pipe, false, DPU_PLANE_QOS_PANIC_CTRL);
 
+		if (pstate->r_pipe.sspp)
+			_dpu_plane_set_qos_ctrl(plane, &pstate->r_pipe, false, DPU_PLANE_QOS_PANIC_CTRL);
+
 		mutex_destroy(&pdpu->lock);
 
 		/* this will destroy the states as well */
@@ -1374,12 +1457,29 @@ static void dpu_plane_atomic_print_state(struct drm_printer *p,
 		const struct drm_plane_state *state)
 {
 	const struct dpu_plane_state *pstate = to_dpu_plane_state(state);
+	const struct dpu_sw_pipe *pipe = &pstate->pipe;
+	const struct dpu_sw_pipe_cfg *pipe_cfg = &pstate->pipe_cfg;
+	const struct dpu_sw_pipe *r_pipe = &pstate->r_pipe;
+	const struct dpu_sw_pipe_cfg *r_pipe_cfg = &pstate->r_pipe_cfg;
 
 	drm_printf(p, "\tstage=%d\n", pstate->stage);
-	drm_printf(p, "\tsspp=%s\n", pstate->pipe.sspp->cap->name);
-	drm_printf(p, "\tmultirect_mode=%s\n", dpu_get_multirect_mode(pstate->pipe.multirect_mode));
-	drm_printf(p, "\tmultirect_index=%s\n",
-		   dpu_get_multirect_index(pstate->pipe.multirect_index));
+
+	drm_printf(p, "\tsspp[0]=%s\n", pipe->sspp->cap->name);
+	drm_printf(p, "\tmultirect_mode[0]=%s\n", dpu_get_multirect_mode(pipe->multirect_mode));
+	drm_printf(p, "\tmultirect_index[0]=%s\n",
+		   dpu_get_multirect_index(pipe->multirect_index));
+	drm_printf(p, "\tsrc[0]=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&pipe_cfg->src_rect));
+	drm_printf(p, "\tdst[0]=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&pipe_cfg->dst_rect));
+
+	if (r_pipe->sspp) {
+		drm_printf(p, "\tsspp[1]=%s\n", r_pipe->sspp->cap->name);
+		drm_printf(p, "\tmultirect_mode[1]=%s\n",
+			   dpu_get_multirect_mode(r_pipe->multirect_mode));
+		drm_printf(p, "\tmultirect_index[1]=%s\n",
+			   dpu_get_multirect_index(r_pipe->multirect_index));
+		drm_printf(p, "\tsrc[1]=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&r_pipe_cfg->src_rect));
+		drm_printf(p, "\tdst[1]=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&r_pipe_cfg->dst_rect));
+	}
 }
 
 static void dpu_plane_reset(struct drm_plane *plane)
@@ -1413,6 +1513,10 @@ static void dpu_plane_reset(struct drm_plane *plane)
 	 * This is the place where the state is allocated, so fill it fully.
 	 */
 	pstate->pipe.sspp = dpu_rm_get_sspp(&dpu_kms->rm, pdpu->pipe);
+	pstate->pipe.multirect_index = DPU_SSPP_RECT_SOLO;
+	pstate->pipe.multirect_mode = DPU_SSPP_MULTIRECT_NONE;
+
+	pstate->r_pipe.sspp = NULL;
 
 	__drm_atomic_helper_plane_reset(plane, &pstate->base);
 }
@@ -1429,6 +1533,8 @@ void dpu_plane_danger_signal_ctrl(struct drm_plane *plane, bool enable)
 
 	pm_runtime_get_sync(&dpu_kms->pdev->dev);
 	_dpu_plane_set_qos_ctrl(plane, &pstate->pipe, enable, DPU_PLANE_QOS_PANIC_CTRL);
+	if (pstate->r_pipe.sspp)
+		_dpu_plane_set_qos_ctrl(plane, &pstate->r_pipe, enable, DPU_PLANE_QOS_PANIC_CTRL);
 	pm_runtime_put_sync(&dpu_kms->pdev->dev);
 }
 #endif

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

@@ -19,7 +19,9 @@
  * @base:	base drm plane state object
  * @aspace:	pointer to address space for input/output buffers
  * @pipe:	software pipe description
+ * @r_pipe:	software pipe description of the second pipe
  * @pipe_cfg:	software pipe configuration
+ * @r_pipe_cfg:	software pipe configuration for the second pipe
  * @stage:	assigned by crtc blender
  * @needs_qos_remap: qos remap settings need to be updated
  * @multirect_index: index of the rectangle of SSPP
@@ -34,7 +36,9 @@ struct dpu_plane_state {
 	struct drm_plane_state base;
 	struct msm_gem_address_space *aspace;
 	struct dpu_sw_pipe pipe;
+	struct dpu_sw_pipe r_pipe;
 	struct dpu_sw_pipe_cfg pipe_cfg;
+	struct dpu_sw_pipe_cfg r_pipe_cfg;
 	enum dpu_stage stage;
 	bool needs_qos_remap;
 	bool pending;