[PATCH v14 1/6] soc: mediatek: mutex: add common interface to accommodate... | linux-arm-kernel

[PATCH v14 1/6] soc: mediatek: mutex: add common interface to accommodate multiple modules operationg MUTEX

From: Moudy Ho <hidden>
Date: 2022-03-17 14:39:51
Also in: linux-devicetree, linux-media, linux-mediatek, lkml
Subsystem: arm/mediatek soc support, the rest · Maintainers: Matthias Brugger, AngeloGioacchino Del Regno, Linus Torvalds

In order to allow multiple modules to operate MUTEX hardware through
a common interfrace, a flexible index "mtk_mutex_table_index" needs to
be added to replace original component ID so that like DDP and MDP
can add their own MUTEX table settings independently.

In addition, 4 generic interface "mtk_mutex_set_mod", "mtk_mutex_set_sof",
"mtk_mutex_clear_mod" and "mtk_mutex_clear_sof" have been added, which is
expected to replace the "mtk_mutex_add_comp" and "mtk_mutex_remove_comp"
pair originally dedicated to DDP in the future.

Signed-off-by: Moudy Ho <redacted>
---
 drivers/soc/mediatek/mtk-mutex.c       | 105 +++++++++++++++++++++++++
 include/linux/soc/mediatek/mtk-mutex.h |  21 +++++
 2 files changed, 126 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-mutex.c b/drivers/soc/mediatek/mtk-mutex.c
index aaf8fc1abb43..f8c33186685a 100644
--- a/drivers/soc/mediatek/mtk-mutex.c
+++ b/drivers/soc/mediatek/mtk-mutex.c

@@ -151,11 +151,17 @@ enum mtk_mutex_sof_id {
 	MUTEX_SOF_DSI3,
 };
 
+struct mtk_mutex_mod {
+	u8 tab;
+	u32 value;
+};
+
 struct mtk_mutex_data {
 	const unsigned int *mutex_mod;
 	const unsigned int *mutex_sof;
 	const unsigned int mutex_mod_reg;
 	const unsigned int mutex_sof_reg;
+	const struct mtk_mutex_mod *mutex_table_mod;
 	const bool no_clk;
 };

@@ -445,6 +451,65 @@ void mtk_mutex_add_comp(struct mtk_mutex *mutex,
 }
 EXPORT_SYMBOL_GPL(mtk_mutex_add_comp);
 
+void mtk_mutex_set_mod(struct mtk_mutex *mutex,
+		       enum mtk_mutex_table_index idx)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+	unsigned int reg;
+	unsigned int offset;
+
+	WARN_ON(&mtx->mutex[mutex->id] != mutex);
+
+	if (idx < MUTEX_TABLE_IDX_MDP_RDMA0 ||
+	    idx >= MUTEX_TABLE_IDX_MAX)
+		return;
+
+	if (mtx->data->mutex_table_mod[idx].tab)
+		offset = DISP_REG_MUTEX_MOD2(mutex->id);
+	else
+		offset = DISP_REG_MUTEX_MOD(mtx->data->mutex_mod_reg,
+					    mutex->id);
+
+	reg = readl_relaxed(mtx->regs + offset);
+	reg |= 1 << mtx->data->mutex_table_mod[idx].value;
+	writel_relaxed(reg, mtx->regs + offset);
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_set_mod);
+
+void mtk_mutex_set_sof(struct mtk_mutex *mutex,
+		       enum mtk_mutex_table_index idx)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+	unsigned int sof_id;
+
+	WARN_ON(&mtx->mutex[mutex->id] != mutex);
+
+	if (idx < MUTEX_TABLE_IDX_MDP_RDMA0 ||
+	    idx >= MUTEX_TABLE_IDX_MAX)
+		return;
+
+	switch (idx) {
+	case MUTEX_TABLE_IDX_MDP_RDMA0:
+	case MUTEX_TABLE_IDX_MDP_RSZ0:
+	case MUTEX_TABLE_IDX_MDP_RSZ1:
+	case MUTEX_TABLE_IDX_MDP_TDSHP0:
+	case MUTEX_TABLE_IDX_MDP_WROT0:
+	case MUTEX_TABLE_IDX_MDP_WDMA:
+	case MUTEX_TABLE_IDX_MDP_AAL0:
+	case MUTEX_TABLE_IDX_MDP_CCORR0:
+	default:
+		sof_id = MUTEX_SOF_SINGLE_MODE;
+		break;
+	}
+
+	writel_relaxed(mtx->data->mutex_sof[sof_id],
+		       mtx->regs +
+		       DISP_REG_MUTEX_SOF(mtx->data->mutex_sof_reg, mutex->id));
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_set_sof);
+
 void mtk_mutex_remove_comp(struct mtk_mutex *mutex,
 			   enum mtk_ddp_comp_id id)
 {

@@ -485,6 +550,46 @@ void mtk_mutex_remove_comp(struct mtk_mutex *mutex,
 }
 EXPORT_SYMBOL_GPL(mtk_mutex_remove_comp);
 
+void mtk_mutex_clear_mod(struct mtk_mutex *mutex,
+			 enum mtk_mutex_table_index idx)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+	unsigned int reg;
+	unsigned int offset;
+
+	WARN_ON(&mtx->mutex[mutex->id] != mutex);
+
+	if (idx < MUTEX_TABLE_IDX_MDP_RDMA0 ||
+	    idx >= MUTEX_TABLE_IDX_MAX)
+		return;
+
+	if (mtx->data->mutex_table_mod[idx].tab)
+		offset = DISP_REG_MUTEX_MOD2(mutex->id);
+	else
+		offset = DISP_REG_MUTEX_MOD(mtx->data->mutex_mod_reg,
+					    mutex->id);
+
+	reg = readl_relaxed(mtx->regs + offset);
+	reg &= ~(1 << mtx->data->mutex_table_mod[idx].value);
+	writel_relaxed(reg, mtx->regs + offset);
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_clear_mod);
+
+void mtk_mutex_clear_sof(struct mtk_mutex *mutex)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+
+	WARN_ON(&mtx->mutex[mutex->id] != mutex);
+
+	writel_relaxed(MUTEX_SOF_SINGLE_MODE,
+		       mtx->regs +
+		       DISP_REG_MUTEX_SOF(mtx->data->mutex_sof_reg,
+					  mutex->id));
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_clear_sof);
+
 void mtk_mutex_enable(struct mtk_mutex *mutex)
 {
 	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,

diff --git a/include/linux/soc/mediatek/mtk-mutex.h b/include/linux/soc/mediatek/mtk-mutex.h
index 6fe4ffbde290..200f4365c950 100644
--- a/include/linux/soc/mediatek/mtk-mutex.h
+++ b/include/linux/soc/mediatek/mtk-mutex.h

@@ -10,14 +10,35 @@ struct regmap;
 struct device;
 struct mtk_mutex;
 
+enum mtk_mutex_table_index {
+	/* MDP table index */
+	MUTEX_TABLE_IDX_MDP_RDMA0,
+	MUTEX_TABLE_IDX_MDP_RSZ0,
+	MUTEX_TABLE_IDX_MDP_RSZ1,
+	MUTEX_TABLE_IDX_MDP_TDSHP0,
+	MUTEX_TABLE_IDX_MDP_WROT0,
+	MUTEX_TABLE_IDX_MDP_WDMA,
+	MUTEX_TABLE_IDX_MDP_AAL0,
+	MUTEX_TABLE_IDX_MDP_CCORR0,
+
+	MUTEX_TABLE_IDX_MAX		/* ALWAYS keep at the end */
+};
+
 struct mtk_mutex *mtk_mutex_get(struct device *dev);
 int mtk_mutex_prepare(struct mtk_mutex *mutex);
 void mtk_mutex_add_comp(struct mtk_mutex *mutex,
 			enum mtk_ddp_comp_id id);
+void mtk_mutex_set_mod(struct mtk_mutex *mutex,
+		       enum mtk_mutex_table_index idx);
+void mtk_mutex_set_sof(struct mtk_mutex *mutex,
+		       enum mtk_mutex_table_index idx);
 void mtk_mutex_enable(struct mtk_mutex *mutex);
 void mtk_mutex_disable(struct mtk_mutex *mutex);
 void mtk_mutex_remove_comp(struct mtk_mutex *mutex,
 			   enum mtk_ddp_comp_id id);
+void mtk_mutex_clear_mod(struct mtk_mutex *mutex,
+			 enum mtk_mutex_table_index idx);
+void mtk_mutex_clear_sof(struct mtk_mutex *mutex);
 void mtk_mutex_unprepare(struct mtk_mutex *mutex);
 void mtk_mutex_put(struct mtk_mutex *mutex);
 void mtk_mutex_acquire(struct mtk_mutex *mutex);

-- 
2.18.0


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