[PATCH v17 1/6] soc: mediatek: mutex: add common interface for modules setting

[Moudy Ho <moudy.ho@mediatek.com>]

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 <moudy.ho@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 drivers/soc/mediatek/mtk-mutex.c       | 88 ++++++++++++++++++++++++++
 include/linux/soc/mediatek/mtk-mutex.h | 22 +++++++
 2 files changed, 110 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-mutex.c b/drivers/soc/mediatek/mtk-mutex.c
index aaf8fc1abb43..a62ac1811419 100644
--- a/drivers/soc/mediatek/mtk-mutex.c
+++ b/drivers/soc/mediatek/mtk-mutex.c
@@ -156,6 +156,8 @@ struct mtk_mutex_data {
 	const unsigned int *mutex_sof;
 	const unsigned int mutex_mod_reg;
 	const unsigned int mutex_sof_reg;
+	const unsigned int *mutex_table_mod;
+	const unsigned int *mutex_table_sof;
 	const bool no_clk;
 };
 
@@ -530,6 +532,92 @@ void mtk_mutex_release(struct mtk_mutex *mutex)
 }
 EXPORT_SYMBOL_GPL(mtk_mutex_release);
 
+static int mtk_mutex_write_mod(struct mtk_mutex *mutex,
+			       enum mtk_mutex_table_index idx, bool clear)
+{
+	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) {
+		dev_err(mtx->dev, "Not supported MOD table index : %d", idx);
+		return -EINVAL;
+	}
+
+	offset = DISP_REG_MUTEX_MOD(mtx->data->mutex_mod_reg,
+				    mutex->id);
+	reg = readl_relaxed(mtx->regs + offset);
+
+	if (clear)
+		reg &= ~BIT(mtx->data->mutex_table_mod[idx]);
+	else
+		reg |= BIT(mtx->data->mutex_table_mod[idx]);
+
+	writel_relaxed(reg, mtx->regs + offset);
+
+	return 0;
+}
+
+int mtk_mutex_set_mod(struct mtk_mutex *mutex,
+		      enum mtk_mutex_table_index idx)
+{
+	return mtk_mutex_write_mod(mutex, idx, false);
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_set_mod);
+
+int mtk_mutex_clear_mod(struct mtk_mutex *mutex,
+			enum mtk_mutex_table_index idx)
+{
+	return mtk_mutex_write_mod(mutex, idx, true);
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_clear_mod);
+
+int mtk_mutex_write_sof(struct mtk_mutex *mutex,
+			enum mtk_mutex_table_index idx, bool clear)
+{
+	struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
+						 mutex[mutex->id]);
+	unsigned int sof_id, val;
+
+	WARN_ON(&mtx->mutex[mutex->id] != mutex);
+
+	if (idx < MUTEX_TABLE_IDX_MDP_RDMA0 ||
+	    idx >= MUTEX_TABLE_IDX_MAX) {
+		dev_err(mtx->dev, "Not supported SOF table index : %d", idx);
+		return -EINVAL;
+	}
+
+	sof_id = mtx->data->mutex_table_sof[idx];
+
+	if (clear)
+		val = MUTEX_SOF_SINGLE_MODE;
+	else
+		val = mtx->data->mutex_sof[sof_id];
+
+	writel_relaxed(val, mtx->regs +
+		       DISP_REG_MUTEX_SOF(mtx->data->mutex_sof_reg, mutex->id));
+
+	return 0;
+}
+
+int mtk_mutex_set_sof(struct mtk_mutex *mutex,
+		      enum mtk_mutex_table_index idx)
+{
+	return mtk_mutex_write_sof(mutex, idx, false);
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_set_sof);
+
+int mtk_mutex_clear_sof(struct mtk_mutex *mutex,
+			enum mtk_mutex_table_index idx)
+{
+	return mtk_mutex_write_sof(mutex, idx, true);
+}
+EXPORT_SYMBOL_GPL(mtk_mutex_clear_sof);
+
 static int mtk_mutex_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
diff --git a/include/linux/soc/mediatek/mtk-mutex.h b/include/linux/soc/mediatek/mtk-mutex.h
index 6fe4ffbde290..f174452212d6 100644
--- a/include/linux/soc/mediatek/mtk-mutex.h
+++ b/include/linux/soc/mediatek/mtk-mutex.h
@@ -10,6 +10,20 @@ 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,
@@ -22,5 +36,13 @@ void mtk_mutex_unprepare(struct mtk_mutex *mutex);
 void mtk_mutex_put(struct mtk_mutex *mutex);
 void mtk_mutex_acquire(struct mtk_mutex *mutex);
 void mtk_mutex_release(struct mtk_mutex *mutex);
+int mtk_mutex_set_mod(struct mtk_mutex *mutex,
+		      enum mtk_mutex_table_index idx);
+int mtk_mutex_clear_mod(struct mtk_mutex *mutex,
+			enum mtk_mutex_table_index idx);
+int mtk_mutex_set_sof(struct mtk_mutex *mutex,
+		      enum mtk_mutex_table_index idx);
+int mtk_mutex_clear_sof(struct mtk_mutex *mutex,
+			enum mtk_mutex_table_index idx);
 
 #endif /* MTK_MUTEX_H */
-- 
2.18.0