drm/msm/dpu: add support of new peripheral flush mechanism

Introduce a peripheral flushing mechanism to decouple peripheral
metadata flushing from timing engine related flush.

Changes in v2:
	- Fixed some misalignment issues

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Signed-off-by: Paloma Arellano <quic_parellan@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/579619/
Link: https://lore.kernel.org/r/20240222194025.25329-15-quic_parellan@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Author: Kuogee Hsieh

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

@@ -39,6 +39,7 @@
 #define   CTL_WB_FLUSH                  0x108
 #define   CTL_INTF_FLUSH                0x110
 #define   CTL_CDM_FLUSH                0x114
+#define   CTL_PERIPH_FLUSH              0x128
 #define   CTL_INTF_MASTER               0x134
 #define   CTL_DSPP_n_FLUSH(n)           ((0x13C) + ((n) * 4))
 
@@ -49,6 +50,7 @@
 #define  MERGE_3D_IDX   23
 #define  DSC_IDX        22
 #define CDM_IDX         26
+#define  PERIPH_IDX     30
 #define  INTF_IDX       31
 #define WB_IDX          16
 #define  DSPP_IDX       29  /* From DPU hw rev 7.x.x */
@@ -151,6 +153,10 @@ static inline void dpu_hw_ctl_trigger_flush_v1(struct dpu_hw_ctl *ctx)
 				ctx->pending_dspp_flush_mask[dspp - DSPP_0]);
 		}
 
+	if (ctx->pending_flush_mask & BIT(PERIPH_IDX))
+		DPU_REG_WRITE(&ctx->hw, CTL_PERIPH_FLUSH,
+			      ctx->pending_periph_flush_mask);
+
 	if (ctx->pending_flush_mask & BIT(DSC_IDX))
 		DPU_REG_WRITE(&ctx->hw, CTL_DSC_FLUSH,
 			      ctx->pending_dsc_flush_mask);
@@ -311,6 +317,13 @@ 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_periph_v1(struct dpu_hw_ctl *ctx,
+						      enum dpu_intf intf)
+{
+	ctx->pending_periph_flush_mask |= BIT(intf - INTF_0);
+	ctx->pending_flush_mask |= BIT(PERIPH_IDX);
+}
+
 static void dpu_hw_ctl_update_pending_flush_merge_3d_v1(struct dpu_hw_ctl *ctx,
 		enum dpu_merge_3d merge_3d)
 {
@@ -680,6 +693,10 @@ static void _setup_ctl_ops(struct dpu_hw_ctl_ops *ops,
 		ops->reset_intf_cfg = dpu_hw_ctl_reset_intf_cfg_v1;
 		ops->update_pending_flush_intf =
 			dpu_hw_ctl_update_pending_flush_intf_v1;
+
+		ops->update_pending_flush_periph =
+			dpu_hw_ctl_update_pending_flush_periph_v1;
+
 		ops->update_pending_flush_merge_3d =
 			dpu_hw_ctl_update_pending_flush_merge_3d_v1;
 		ops->update_pending_flush_wb = dpu_hw_ctl_update_pending_flush_wb_v1;

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

@@ -122,6 +122,15 @@ 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_(periph_)flush_mask
+	 * No effect on hardware
+	 * @ctx       : ctl path ctx pointer
+	 * @blk       : interface block index
+	 */
+	void (*update_pending_flush_periph)(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
@@ -264,6 +273,7 @@ struct dpu_hw_ctl {
 	u32 pending_flush_mask;
 	u32 pending_intf_flush_mask;
 	u32 pending_wb_flush_mask;
+	u32 pending_periph_flush_mask;
 	u32 pending_merge_3d_flush_mask;
 	u32 pending_dspp_flush_mask[DSPP_MAX - DSPP_0];
 	u32 pending_dsc_flush_mask;