drm/msm/dpu: handle merge_3d configuration in hw_ctl block

Active HW CTL blocks need separate handling for merge_3d flushes.
Implement necessary merge_3d configuration and flushing.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

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

@@ -22,7 +22,9 @@
 #define   CTL_PREPARE                   0x0d0
 #define   CTL_SW_RESET                  0x030
 #define   CTL_LAYER_EXTN_OFFSET         0x40
+#define   CTL_MERGE_3D_ACTIVE           0x0E4
 #define   CTL_INTF_ACTIVE               0x0F4
+#define   CTL_MERGE_3D_FLUSH            0x100
 #define   CTL_INTF_FLUSH                0x110
 #define   CTL_INTF_MASTER               0x134
 
@@ -30,6 +32,7 @@
 #define CTL_FLUSH_MASK_CTL              BIT(17)
 
 #define DPU_REG_RESET_TIMEOUT_US        2000
+#define  MERGE_3D_IDX   23
 #define  INTF_IDX       31
 
 static const struct dpu_ctl_cfg *_ctl_offset(enum dpu_ctl ctl,
@@ -112,6 +115,9 @@ static u32 dpu_hw_ctl_get_pending_flush(struct dpu_hw_ctl *ctx)
 static inline void dpu_hw_ctl_trigger_flush_v1(struct dpu_hw_ctl *ctx)
 {
 
+	if (ctx->pending_flush_mask & BIT(MERGE_3D_IDX))
+		DPU_REG_WRITE(&ctx->hw, CTL_MERGE_3D_FLUSH,
+				ctx->pending_merge_3d_flush_mask);
 	if (ctx->pending_flush_mask & BIT(INTF_IDX))
 		DPU_REG_WRITE(&ctx->hw, CTL_INTF_FLUSH,
 				ctx->pending_intf_flush_mask);
@@ -242,6 +248,13 @@ static void dpu_hw_ctl_update_pending_flush_intf_v1(struct dpu_hw_ctl *ctx,
 	ctx->pending_flush_mask |= BIT(INTF_IDX);
 }
 
+static void dpu_hw_ctl_update_pending_flush_merge_3d_v1(struct dpu_hw_ctl *ctx,
+		enum dpu_merge_3d merge_3d)
+{
+	ctx->pending_merge_3d_flush_mask |= BIT(merge_3d - MERGE_3D_0);
+	ctx->pending_flush_mask |= BIT(MERGE_3D_IDX);
+}
+
 static uint32_t dpu_hw_ctl_get_bitmask_dspp(struct dpu_hw_ctl *ctx,
 	enum dpu_dspp dspp)
 {
@@ -483,6 +496,7 @@ static void dpu_hw_ctl_intf_cfg_v1(struct dpu_hw_ctl *ctx,
 
 	DPU_REG_WRITE(c, CTL_TOP, mode_sel);
 	DPU_REG_WRITE(c, CTL_INTF_ACTIVE, intf_active);
+	DPU_REG_WRITE(c, CTL_MERGE_3D_ACTIVE, BIT(cfg->merge_3d - MERGE_3D_0));
 }
 
 static void dpu_hw_ctl_intf_cfg(struct dpu_hw_ctl *ctx,
@@ -523,6 +537,8 @@ static void _setup_ctl_ops(struct dpu_hw_ctl_ops *ops,
 		ops->setup_intf_cfg = dpu_hw_ctl_intf_cfg_v1;
 		ops->update_pending_flush_intf =
 			dpu_hw_ctl_update_pending_flush_intf_v1;
+		ops->update_pending_flush_merge_3d =
+			dpu_hw_ctl_update_pending_flush_merge_3d_v1;
 	} else {
 		ops->trigger_flush = dpu_hw_ctl_trigger_flush;
 		ops->setup_intf_cfg = dpu_hw_ctl_intf_cfg;

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

@@ -37,12 +37,14 @@ struct dpu_hw_stage_cfg {
  * struct dpu_hw_intf_cfg :Describes how the DPU writes data to output interface
  * @intf :                 Interface id
  * @mode_3d:               3d mux configuration
+ * @merge_3d:              3d merge block used
  * @intf_mode_sel:         Interface mode, cmd / vid
  * @stream_sel:            Stream selection for multi-stream interfaces
  */
 struct dpu_hw_intf_cfg {
 	enum dpu_intf intf;
 	enum dpu_3d_blend_mode mode_3d;
+	enum dpu_merge_3d merge_3d;
 	enum dpu_ctl_mode_sel intf_mode_sel;
 	int stream_sel;
 };
@@ -99,6 +101,15 @@ struct dpu_hw_ctl_ops {
 	void (*update_pending_flush_intf)(struct dpu_hw_ctl *ctx,
 		enum dpu_intf blk);
 
+	/**
+	 * OR in the given flushbits to the cached pending_(merge_3d_)flush_mask
+	 * No effect on hardware
+	 * @ctx       : ctl path ctx pointer
+	 * @blk       : interface block index
+	 */
+	void (*update_pending_flush_merge_3d)(struct dpu_hw_ctl *ctx,
+		enum dpu_merge_3d blk);
+
 	/**
 	 * Write the value of the pending_flush_mask to hardware
 	 * @ctx       : ctl path ctx pointer
@@ -181,6 +192,7 @@ struct dpu_hw_ctl {
 	const struct dpu_lm_cfg *mixer_hw_caps;
 	u32 pending_flush_mask;
 	u32 pending_intf_flush_mask;
+	u32 pending_merge_3d_flush_mask;
 
 	/* ops */
 	struct dpu_hw_ctl_ops ops;