drm/msm/dpu: Implement CTL_PIPE_ACTIVE for v12.0 DPU

v12.0 DPU on SM8750 comes with new CTL_PIPE_ACTIVE register for
selective activation of pipes, which replaces earlier
dpu_hw_ctl_setup_blendstage() code path for newer devices.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/659630/
Link: https://lore.kernel.org/r/20250618-b4-sm8750-display-v7-11-a591c609743d@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

4 files changed, 47 insertions, 2 deletions

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 5e986640c8ce..50897de0ab55 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -453,8 +453,10 @@ static void _dpu_crtc_blend_setup_mixer(struct drm_crtc *crtc,
 	u32 lm_idx;
 	bool bg_alpha_enable = false;
 	DECLARE_BITMAP(active_fetch, SSPP_MAX);
+	DECLARE_BITMAP(active_pipes, SSPP_MAX);
 
 	memset(active_fetch, 0, sizeof(active_fetch));
+	memset(active_pipes, 0, sizeof(active_pipes));
 	drm_atomic_crtc_for_each_plane(plane, crtc) {
 		state = plane->state;
 		if (!state)
@@ -472,6 +474,7 @@ static void _dpu_crtc_blend_setup_mixer(struct drm_crtc *crtc,
 			bg_alpha_enable = true;
 
 		set_bit(pstate->pipe.sspp->idx, active_fetch);
+		set_bit(pstate->pipe.sspp->idx, active_pipes);
 		_dpu_crtc_blend_setup_pipe(crtc, plane,
 					   mixer, cstate->num_mixers,
 					   pstate->stage,
@@ -480,6 +483,7 @@ static void _dpu_crtc_blend_setup_mixer(struct drm_crtc *crtc,
 
 		if (pstate->r_pipe.sspp) {
 			set_bit(pstate->r_pipe.sspp->idx, active_fetch);
+			set_bit(pstate->r_pipe.sspp->idx, active_pipes);
 			_dpu_crtc_blend_setup_pipe(crtc, plane,
 						   mixer, cstate->num_mixers,
 						   pstate->stage,
@@ -503,6 +507,9 @@ static void _dpu_crtc_blend_setup_mixer(struct drm_crtc *crtc,
 	if (ctl->ops.set_active_fetch_pipes)
 		ctl->ops.set_active_fetch_pipes(ctl, active_fetch);
 
+	if (ctl->ops.set_active_pipes)
+		ctl->ops.set_active_pipes(ctl, active_pipes);
+
 	_dpu_crtc_program_lm_output_roi(crtc);
 }
 
@@ -529,6 +536,8 @@ static void _dpu_crtc_blend_setup(struct drm_crtc *crtc)
 					mixer[i].lm_ctl);
 		if (mixer[i].lm_ctl->ops.set_active_fetch_pipes)
 			mixer[i].lm_ctl->ops.set_active_fetch_pipes(mixer[i].lm_ctl, NULL);
+		if (mixer[i].lm_ctl->ops.set_active_pipes)
+			mixer[i].lm_ctl->ops.set_active_pipes(mixer[i].lm_ctl, NULL);
 	}
 
 	/* initialize stage cfg */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index c0ed110a7d30..a52d5a74759e 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -2197,6 +2197,9 @@ static void dpu_encoder_helper_reset_mixers(struct dpu_encoder_phys *phys_enc)
 
 		if (ctl->ops.set_active_fetch_pipes)
 			ctl->ops.set_active_fetch_pipes(ctl, NULL);
+
+		if (ctl->ops.set_active_pipes)
+			ctl->ops.set_active_pipes(ctl, NULL);
 	}
 }
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
index fe4fdfb8774b..4299e94351d5 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
@@ -42,6 +42,7 @@
 #define   CTL_INTF_FLUSH                0x110
 #define   CTL_CDM_FLUSH                0x114
 #define   CTL_PERIPH_FLUSH              0x128
+#define   CTL_PIPE_ACTIVE               0x12c
 #define   CTL_INTF_MASTER               0x134
 #define   CTL_DSPP_n_FLUSH(n)           ((0x13C) + ((n) * 4))
 
@@ -681,6 +682,9 @@ static void dpu_hw_ctl_reset_intf_cfg_v1(struct dpu_hw_ctl *ctx,
 	if (ctx->ops.set_active_fetch_pipes)
 		ctx->ops.set_active_fetch_pipes(ctx, NULL);
 
+	if (ctx->ops.set_active_pipes)
+		ctx->ops.set_active_pipes(ctx, NULL);
+
 	if (cfg->intf) {
 		intf_active = DPU_REG_READ(c, CTL_INTF_ACTIVE);
 		intf_active &= ~BIT(cfg->intf - INTF_0);
@@ -737,6 +741,23 @@ static void dpu_hw_ctl_set_active_fetch_pipes(struct dpu_hw_ctl *ctx,
 	DPU_REG_WRITE(&ctx->hw, CTL_FETCH_PIPE_ACTIVE, val);
 }
 
+static void dpu_hw_ctl_set_active_pipes(struct dpu_hw_ctl *ctx,
+					unsigned long *active_pipes)
+{
+	int i;
+	u32 val = 0;
+
+	if (active_pipes) {
+		for (i = 0; i < SSPP_MAX; i++) {
+			if (test_bit(i, active_pipes) &&
+			    fetch_tbl[i] != CTL_INVALID_BIT)
+				val |= BIT(fetch_tbl[i]);
+		}
+	}
+
+	DPU_REG_WRITE(&ctx->hw, CTL_PIPE_ACTIVE, val);
+}
+
 /**
  * dpu_hw_ctl_init() - Initializes the ctl_path hw driver object.
  * Should be called before accessing any ctl_path register.
@@ -800,8 +821,12 @@ struct dpu_hw_ctl *dpu_hw_ctl_init(struct drm_device *dev,
 	c->ops.trigger_pending = dpu_hw_ctl_trigger_pending;
 	c->ops.reset = dpu_hw_ctl_reset_control;
 	c->ops.wait_reset_status = dpu_hw_ctl_wait_reset_status;
-	c->ops.clear_all_blendstages = dpu_hw_ctl_clear_all_blendstages;
-	c->ops.setup_blendstage = dpu_hw_ctl_setup_blendstage;
+	if (mdss_ver->core_major_ver < 12) {
+		c->ops.clear_all_blendstages = dpu_hw_ctl_clear_all_blendstages;
+		c->ops.setup_blendstage = dpu_hw_ctl_setup_blendstage;
+	} else {
+		c->ops.set_active_pipes = dpu_hw_ctl_set_active_pipes;
+	}
 	c->ops.update_pending_flush_sspp = dpu_hw_ctl_update_pending_flush_sspp;
 	c->ops.update_pending_flush_mixer = dpu_hw_ctl_update_pending_flush_mixer;
 	if (mdss_ver->core_major_ver >= 7)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
index 9cd9959682c2..ca8f34ff3964 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
@@ -258,6 +258,14 @@ struct dpu_hw_ctl_ops {
 
 	void (*set_active_fetch_pipes)(struct dpu_hw_ctl *ctx,
 		unsigned long *fetch_active);
+
+	/**
+	 * Set active pipes attached to this CTL
+	 * @ctx: ctl path ctx pointer
+	 * @active_pipes: bitmap of enum dpu_sspp
+	 */
+	void (*set_active_pipes)(struct dpu_hw_ctl *ctx,
+				 unsigned long *active_pipes);
 };
 
 /**