The CWB mux has its own registers and set of operations. Add dpu_hw_cwb
abstraction to allow driver to configure the CWB mux.
Signed-off-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/Makefile | 1 +
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.c | 73 +++++++++++++++++++++++++++++
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.h | 70 +++++++++++++++++++++++++++
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h | 5 +-
4 files changed, 148 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
index 13110fcc46a8..e05bb740246b 100644
--- a/drivers/gpu/drm/msm/Makefile
+++ b/drivers/gpu/drm/msm/Makefile
@@ -77,6 +77,7 @@ msm-display-$(CONFIG_DRM_MSM_DPU) += \
disp/dpu1/dpu_hw_catalog.o \
disp/dpu1/dpu_hw_cdm.o \
disp/dpu1/dpu_hw_ctl.o \
+ disp/dpu1/dpu_hw_cwb.o \
disp/dpu1/dpu_hw_dsc.o \
disp/dpu1/dpu_hw_dsc_1_2.o \
disp/dpu1/dpu_hw_interrupts.o \
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.c
new file mode 100644
index 000000000000..5fbf52906ea9
--- /dev/null
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved
+ */
+
+#include <drm/drm_managed.h>
+#include "dpu_hw_cwb.h"
+
+#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_cwb_config(struct dpu_hw_cwb *ctx,
+ struct dpu_hw_cwb_setup_cfg *cwb_cfg)
+{
+ struct dpu_hw_blk_reg_map *c = &ctx->hw;
+ int cwb_mux_cfg = 0xF;
+ enum dpu_pingpong pp;
+ enum cwb_mode_input input;
+
+ if (!cwb_cfg)
+ return;
+
+ input = cwb_cfg->input;
+ pp = cwb_cfg->pp_idx;
+
+ if (input >= INPUT_MODE_MAX)
+ return;
+
+ /*
+ * The CWB_MUX register takes the pingpong index for the real-time
+ * display
+ */
+ if ((pp != PINGPONG_NONE) && (pp < PINGPONG_MAX))
+ cwb_mux_cfg = FIELD_PREP(CWB_MUX_MASK, pp - PINGPONG_0);
+
+ input = FIELD_PREP(CWB_MODE_MASK, input);
+
+ DPU_REG_WRITE(c, CWB_MUX, cwb_mux_cfg);
+ DPU_REG_WRITE(c, CWB_MODE, input);
+}
+
+/**
+ * dpu_hw_cwb_init() - 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
+ * Return: Error code or allocated dpu_hw_wb context
+ */
+struct dpu_hw_cwb *dpu_hw_cwb_init(struct drm_device *dev,
+ const struct dpu_cwb_cfg *cfg,
+ void __iomem *addr)
+{
+ struct dpu_hw_cwb *c;
+
+ if (!addr)
+ return ERR_PTR(-EINVAL);
+
+ c = drmm_kzalloc(dev, sizeof(*c), GFP_KERNEL);
+ if (!c)
+ return ERR_PTR(-ENOMEM);
+
+ c->hw.blk_addr = addr + cfg->base;
+ c->hw.log_mask = DPU_DBG_MASK_CWB;
+
+ c->idx = cfg->id;
+ c->ops.config_cwb = dpu_hw_cwb_config;
+
+ return c;
+}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.h
new file mode 100644
index 000000000000..96b6edf6b2bb
--- /dev/null
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.h
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved
+ */
+
+#ifndef _DPU_HW_CWB_H
+#define _DPU_HW_CWB_H
+
+#include "dpu_hw_util.h"
+
+struct dpu_hw_cwb;
+
+enum cwb_mode_input {
+ INPUT_MODE_LM_OUT,
+ INPUT_MODE_DSPP_OUT,
+ INPUT_MODE_MAX
+};
+
+/**
+ * struct dpu_hw_cwb_setup_cfg : Describes configuration for CWB mux
+ * @pp_idx: Index of the real-time pinpong that the CWB mux will
+ * feed the CWB mux
+ * @input: Input tap point
+ */
+struct dpu_hw_cwb_setup_cfg {
+ enum dpu_pingpong pp_idx;
+ enum cwb_mode_input input;
+};
+
+/**
+ *
+ * struct dpu_hw_cwb_ops : Interface to the cwb hw driver functions
+ * @config_cwb: configure CWB mux
+ */
+struct dpu_hw_cwb_ops {
+ void (*config_cwb)(struct dpu_hw_cwb *ctx,
+ struct dpu_hw_cwb_setup_cfg *cwb_cfg);
+};
+
+/**
+ * struct dpu_hw_cwb : CWB mux driver object
+ * @base: Hardware block base structure
+ * @hw: Block hardware details
+ * @idx: CWB index
+ * @ops: handle to operations possible for this CWB
+ */
+struct dpu_hw_cwb {
+ struct dpu_hw_blk base;
+ struct dpu_hw_blk_reg_map hw;
+
+ enum dpu_cwb idx;
+
+ struct dpu_hw_cwb_ops ops;
+};
+
+/**
+ * dpu_hw_cwb - convert base object dpu_hw_base to container
+ * @hw: Pointer to base hardware block
+ * return: Pointer to hardware block container
+ */
+static inline struct dpu_hw_cwb *to_dpu_hw_cwb(struct dpu_hw_blk *hw)
+{
+ return container_of(hw, struct dpu_hw_cwb, base);
+}
+
+struct dpu_hw_cwb *dpu_hw_cwb_init(struct drm_device *dev,
+ const struct dpu_cwb_cfg *cfg,
+ void __iomem *addr);
+
+#endif /*_DPU_HW_CWB_H */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h
index c17d2d356f7a..c43cb55fe1d2 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h
@@ -1,5 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0-only */
-/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
+/*
+ * Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
*/
#ifndef _DPU_HW_MDSS_H
@@ -352,6 +354,7 @@ struct dpu_mdss_color {
#define DPU_DBG_MASK_DSPP (1 << 10)
#define DPU_DBG_MASK_DSC (1 << 11)
#define DPU_DBG_MASK_CDM (1 << 12)
+#define DPU_DBG_MASK_CWB (1 << 13)
/**
* struct dpu_hw_tear_check - Struct contains parameters to configure
--
2.34.1
