[PATCH 10/21] drm/msm/dpu: add CWB support to dpu_hw_wb

[Jessica Zhang]

From: Esha Bharadwaj <quic_ebharadw at quicinc.com>

Add function ops to allow hw_wb to configure CWB registers and adjust
the WB_MUX configuration to account for using dedicated CWB pingpong
blocks.

Signed-off-by: Esha Bharadwaj <quic_ebharadw at quicinc.com>
Signed-off-by: Jessica Zhang <quic_jesszhan at quicinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c | 69 ++++++++++++++++++++++++++++++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h | 34 +++++++++++++++
 2 files changed, 102 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
index 93ff01c889b5..998c9fbd22a6 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
@@ -51,6 +51,12 @@
 #define WB_CDP_CNTL                           0x2B4
 #define WB_OUT_IMAGE_SIZE                     0x2C0
 #define WB_OUT_XY                             0x2C4
+#define CWB_MUX                               0x000
+#define CWB_MODE                              0x004
+
+/* CWB mux block bit definitions */
+#define CWB_MUX_MASK                          GENMASK(3, 0)
+#define CWB_MODE_MASK                         GENMASK(2, 0)
 
 static void dpu_hw_wb_setup_outaddress(struct dpu_hw_wb *ctx,
 		struct dpu_hw_wb_cfg *data)
@@ -173,7 +179,9 @@ static void dpu_hw_wb_bind_pingpong_blk(
 	mux_cfg = DPU_REG_READ(c, WB_MUX);
 	mux_cfg &= ~0xf;
 
-	if (pp)
+	if (pp >= PINGPONG_CWB_0)
+		mux_cfg |= (pp < PINGPONG_CWB_2) ? 0xd : 0xb;
+	else if (pp)
 		mux_cfg |= (pp - PINGPONG_0) & 0x7;
 	else
 		mux_cfg |= 0xf;
@@ -237,3 +245,62 @@ struct dpu_hw_wb *dpu_hw_wb_init(struct drm_device *dev,
 
 	return c;
 }
+
+static void dpu_hw_cwb_setup_input_ctrl(struct dpu_hw_wb *ctx,
+				enum dpu_cwb cwb_idx,
+				const enum dpu_pingpong pp)
+{
+	struct dpu_hw_blk_reg_map *c;
+	int cwb_mux_cfg = 0xF;
+
+	if (cwb_idx < CWB_0 || cwb_idx >= CWB_MAX)
+		return;
+
+	c = &ctx->cwb_hw[cwb_idx - CWB_0];
+
+	/*
+	 * The CWB_MUX register takes the pingpong index relative to
+	 * PINGPONG_CWB_0 and not PINGPONG_0
+	 */
+	if ((pp != PINGPONG_NONE) && (pp < PINGPONG_MAX))
+		cwb_mux_cfg = FIELD_PREP(CWB_MUX_MASK, pp - PINGPONG_CWB_0);
+
+	DPU_REG_WRITE(c, CWB_MUX, cwb_mux_cfg);
+}
+
+static void dpu_hw_cwb_setup_input_mode(struct dpu_hw_wb *ctx,
+				enum dpu_cwb cwb_idx,
+				const enum cwb_mode_input input)
+{
+	struct dpu_hw_blk_reg_map *c;
+	int cwb_mux_cfg;
+
+	if (cwb_idx < CWB_0 || cwb_idx >= CWB_MAX || input >= INPUT_MODE_MAX)
+		return;
+
+	c = &ctx->cwb_hw[cwb_idx - CWB_0];
+	cwb_mux_cfg = FIELD_PREP(CWB_MODE_MASK, input);
+
+	DPU_REG_WRITE(c, CWB_MODE, cwb_mux_cfg);
+}
+
+static void _setup_cwb_ops(struct dpu_hw_wb_ops *ops)
+{
+	ops->setup_input_ctrl = dpu_hw_cwb_setup_input_ctrl;
+	ops->setup_input_mode = dpu_hw_cwb_setup_input_mode;
+}
+
+struct dpu_hw_wb *dpu_hw_wb_init_with_cwb(struct drm_device *dev,
+				 const struct dpu_wb_cfg *cfg,
+				 void __iomem *addr,
+				 const struct dpu_mdss_version *mdss_rev,
+				 struct dpu_hw_blk_reg_map *cwb_hw)
+{
+	struct dpu_hw_wb *c = dpu_hw_wb_init(dev, cfg, addr, mdss_rev);
+
+	c->cwb_hw = cwb_hw;
+
+	_setup_cwb_ops(&c->ops);
+
+	return c;
+}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h
index 37497473e16c..1ff40f8325e5 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h
@@ -21,6 +21,12 @@ struct dpu_hw_wb_cfg {
 	struct drm_rect crop;
 };
 
+enum cwb_mode_input {
+	INPUT_MODE_LM_OUT,
+	INPUT_MODE_DSPP_OUT,
+	INPUT_MODE_MAX
+};
+
 /**
  *
  * struct dpu_hw_wb_ops : Interface to the wb hw driver functions
@@ -31,6 +37,8 @@ struct dpu_hw_wb_cfg {
  *  @setup_cdp:       setup chroma down prefetch block for writeback block
  *  @setup_clk_force_ctrl: setup clock force control
  *  @bind_pingpong_blk: enable/disable the connection with ping-pong block
+ *  @setup_ctrl: setup ctrl register for cwb
+ *  @setup_mode: setup mode register for cwb
  */
 struct dpu_hw_wb_ops {
 	void (*setup_outaddress)(struct dpu_hw_wb *ctx,
@@ -54,11 +62,20 @@ struct dpu_hw_wb_ops {
 
 	void (*bind_pingpong_blk)(struct dpu_hw_wb *ctx,
 				  const enum dpu_pingpong pp);
+
+	void (*setup_input_ctrl)(struct dpu_hw_wb *ctx,
+				 enum dpu_cwb cwb_idx,
+				 const enum dpu_pingpong pp);
+
+	void (*setup_input_mode)(struct dpu_hw_wb *ctx,
+				 enum dpu_cwb cwb_idx,
+				 const enum cwb_mode_input input);
 };
 
 /**
  * struct dpu_hw_wb : WB driver object
  * @hw: block hardware details
+ * @cwb_hw: block hardware details of cwb_muxes
  * @idx: hardware index number within type
  * @wb_hw_caps: hardware capabilities
  * @ops: function pointers
@@ -66,6 +83,9 @@ struct dpu_hw_wb_ops {
 struct dpu_hw_wb {
 	struct dpu_hw_blk_reg_map hw;
 
+	/* cwb data */
+	struct dpu_hw_blk_reg_map *cwb_hw;
+
 	/* wb path */
 	int idx;
 	const struct dpu_wb_cfg *caps;
@@ -87,4 +107,18 @@ struct dpu_hw_wb *dpu_hw_wb_init(struct drm_device *dev,
 				 void __iomem *addr,
 				 const struct dpu_mdss_version *mdss_rev);
 
+/**
+ * dpu_hw_wb_init_with_cwb() - Initializes the writeback hw driver object with cwb.
+ * @dev:  Corresponding device for devres management
+ * @cfg:  wb_path catalog entry for which driver object is required
+ * @addr: mapped register io address of MDP
+ * @hw: array of cwb muxes
+ * Return: Error code or allocated dpu_hw_wb context
+ */
+struct dpu_hw_wb *dpu_hw_wb_init_with_cwb(struct drm_device *dev,
+					const struct dpu_wb_cfg *cfg,
+					void __iomem *addr,
+					const struct dpu_mdss_version *mdss_rev,
+					struct dpu_hw_blk_reg_map *hw);
+
 #endif /*_DPU_HW_WB_H */

-- 
2.34.1