[PATCH 2/4] drm/msm/dpu: add SSPP op to program the source split order

[Mahadevan P]

DPU 5.0 introduced SRC_SPLIT_ORDER in bit 4 of SSPP_SRC_OP_MODE and
SSPP_SRC_OP_MODE_REC1. For source-split pairs using legacy CTL routing,
this field identifies the left source with 0 and the right source with 1.

Add a setup_src_split_order() operation for the SSPP register layout
used on DPU 5.0 through 12.x. Select SSPP_SRC_OP_MODE for SOLO or RECT0
and SSPP_SRC_OP_MODE_REC1 for RECT1, and update only the ordering bit.

Assisted-by: LLM
Signed-off-by: Mahadevan P <mahadevan.p@xxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c | 35 +++++++++++++++++++++++++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h | 11 +++++++++
 2 files changed, 46 insertions(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
index b5e50fc1916f..f6ec883f9066 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
@@ -84,6 +84,7 @@
 #define MDSS_MDP_OP_IGC_EN                 BIT(16)
 #define MDSS_MDP_OP_FLIP_UD                BIT(14)
 #define MDSS_MDP_OP_FLIP_LR                BIT(13)
+#define MDSS_MDP_OP_SRC_SPLIT_ORDER        BIT(4)
 #define MDSS_MDP_OP_BWC_EN                 BIT(0)
 #define MDSS_MDP_OP_PE_OVERRIDE            BIT(31)
 #define MDSS_MDP_OP_BWC_LOSSLESS           (0 << 1)
@@ -260,6 +261,38 @@ static void dpu_hw_sspp_setup_format(struct dpu_sw_pipe *pipe,
 				 ubwc_ctrl_off, ubwc_error_off);
 }
 
+void dpu_hw_setup_src_split_order_impl(struct dpu_hw_sspp *ctx,
+				       u32 op_mode_off, bool right)
+{
+	u32 opmode;
+
+	opmode = DPU_REG_READ(&ctx->hw, op_mode_off);
+	if (right)
+		opmode |= MDSS_MDP_OP_SRC_SPLIT_ORDER;
+	else
+		opmode &= ~MDSS_MDP_OP_SRC_SPLIT_ORDER;
+
+	DPU_REG_WRITE(&ctx->hw, op_mode_off, opmode);
+}
+
+static void dpu_hw_sspp_setup_src_split_order(struct dpu_sw_pipe *pipe,
+					      bool right)
+{
+	struct dpu_hw_sspp *ctx = pipe->sspp;
+	u32 op_mode_off;
+
+	if (!ctx)
+		return;
+
+	if (pipe->multirect_index == DPU_SSPP_RECT_SOLO ||
+	    pipe->multirect_index == DPU_SSPP_RECT_0)
+		op_mode_off = SSPP_SRC_OP_MODE;
+	else
+		op_mode_off = SSPP_SRC_OP_MODE_REC1;
+
+	dpu_hw_setup_src_split_order_impl(ctx, op_mode_off, right);
+}
+
 void dpu_hw_setup_format_impl(struct dpu_sw_pipe *pipe, const struct msm_format *fmt,
 			      u32 flags, struct dpu_hw_sspp *ctx, u32 op_mode_off,
 			      u32 unpack_pat_off, u32 format_off, u32 ubwc_ctrl_off,
@@ -636,6 +669,8 @@ static void _setup_layer_ops(struct dpu_hw_sspp *c,
 	c->ops.setup_sourceaddress = dpu_hw_sspp_setup_sourceaddress;
 	c->ops.setup_solidfill = dpu_hw_sspp_setup_solidfill;
 	c->ops.setup_pe = dpu_hw_sspp_setup_pe_config;
+	if (mdss_rev->core_major_ver >= 5)
+		c->ops.setup_src_split_order = dpu_hw_sspp_setup_src_split_order;
 
 	if (test_bit(DPU_SSPP_QOS, &features)) {
 		c->ops.setup_qos_lut = dpu_hw_sspp_setup_qos_lut;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h
index 69d68cc916b2..9b9ea2e00a00 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h
@@ -236,6 +236,14 @@ struct dpu_hw_sspp_ops {
 
 	void (*setup_multirect)(struct dpu_sw_pipe *pipe);
 
+	/**
+	 * @setup_src_split_order: program the position of the pipe within
+	 *                         a source split pair
+	 * @pipe: Pointer to pipe context
+	 * @right: true if the pipe fetches the right half of the pair
+	 */
+	void (*setup_src_split_order)(struct dpu_sw_pipe *pipe, bool right);
+
 	/**
 	 * @setup_sharpening: setup sharpening
 	 * @ctx: Pointer to pipe context
@@ -349,6 +357,9 @@ void dpu_hw_setup_multirect_impl(struct dpu_sw_pipe *pipe,
 				 struct dpu_hw_sspp *ctx,
 				 u32 op_mode_off);
 
+void dpu_hw_setup_src_split_order_impl(struct dpu_hw_sspp *ctx,
+				       u32 op_mode_off, bool right);
+
 void dpu_hw_setup_format_impl(struct dpu_sw_pipe *pipe, const struct msm_format *fmt,
 			      u32 flags, struct dpu_hw_sspp *ctx,
 			      u32 op_mode_off, u32 unpack_pat_off, u32 format_off,

-- 
2.34.1