Re: [PATCH v19 1/6] soc: mediatek: mutex: add common interface for modules setting

[CK Hu]

Hi, Moudy:

On Tue, 2022-05-31 at 13:52 +0800, Moudy Ho wrote:
> In order to allow multiple modules to operate MUTEX hardware through
> a common interfrace, two flexible indexes "mtk_mutex_mod_index" and
> "mtk_mutex_sof_index" need to be added to replace original component
> ID so that like DDP and MDP can add their own MOD table or SOF
> settings independently.
> 
> In addition, 2 generic interface "mtk_mutex_write_mod" and
> "mtk_mutex_write_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@xxxxxxxxxxxx>
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@xxxxxxxxxxxxx>
> Reviewed-by: Rex-BC Chen <rex-bc.chen@xxxxxxxxxxxx>
> ---
>  drivers/soc/mediatek/mtk-mutex.c       | 59
> ++++++++++++++++++++++++++
>  include/linux/soc/mediatek/mtk-mutex.h | 26 ++++++++++++
>  2 files changed, 85 insertions(+)
> 
> diff --git a/drivers/soc/mediatek/mtk-mutex.c
> b/drivers/soc/mediatek/mtk-mutex.c
> index 981d56967e7a..a3b054b33826 100644
> --- a/drivers/soc/mediatek/mtk-mutex.c
> +++ b/drivers/soc/mediatek/mtk-mutex.c
> @@ -185,6 +185,7 @@ 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 bool no_clk;
>  };
>  
> @@ -606,6 +607,64 @@ void mtk_mutex_release(struct mtk_mutex *mutex)
>  }
>  EXPORT_SYMBOL_GPL(mtk_mutex_release);
>  
> +int mtk_mutex_write_mod(struct mtk_mutex *mutex,
> +			enum mtk_mutex_mod_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_MOD_IDX_MDP_RDMA0 ||
> +	    idx >= MUTEX_MOD_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;
> +}
> +EXPORT_SYMBOL_GPL(mtk_mutex_write_mod);
> +
> +int mtk_mutex_write_sof(struct mtk_mutex *mutex,
> +			enum mtk_mutex_sof_index idx, bool clear)
> +{
> +	struct mtk_mutex_ctx *mtx = container_of(mutex, struct
> mtk_mutex_ctx,
> +						 mutex[mutex->id]);
> +	unsigned int val;
> +
> +	WARN_ON(&mtx->mutex[mutex->id] != mutex);
> +
> +	if (idx < MUTEX_SOF_IDX_SINGLE_MODE ||
> +	    idx >= MUTEX_SOF_IDX_MAX) {
> +		dev_err(mtx->dev, "Not supported SOF index : %d", idx);
> +		return -EINVAL;
> +	}
> +
> +	if (clear)
> +		val = MUTEX_SOF_SINGLE_MODE;

This equal to 'idx = MUTEX_SOF_SINGLE_MODE', so 'clear' is not
necessary.

Regards,
CK

> +	else
> +		val = idx;
> +
> +	writel_relaxed(val, mtx->regs +
> +		       DISP_REG_MUTEX_SOF(mtx->data->mutex_sof_reg,
> mutex->id));
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(mtk_mutex_write_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..829231523e3f 100644
> --- a/include/linux/soc/mediatek/mtk-mutex.h
> +++ b/include/linux/soc/mediatek/mtk-mutex.h
> @@ -10,6 +10,26 @@ struct regmap;
>  struct device;
>  struct mtk_mutex;
>  
> +enum mtk_mutex_mod_index {
> +	/* MDP table index */
> +	MUTEX_MOD_IDX_MDP_RDMA0,
> +	MUTEX_MOD_IDX_MDP_RSZ0,
> +	MUTEX_MOD_IDX_MDP_RSZ1,
> +	MUTEX_MOD_IDX_MDP_TDSHP0,
> +	MUTEX_MOD_IDX_MDP_WROT0,
> +	MUTEX_MOD_IDX_MDP_WDMA,
> +	MUTEX_MOD_IDX_MDP_AAL0,
> +	MUTEX_MOD_IDX_MDP_CCORR0,
> +
> +	MUTEX_MOD_IDX_MAX		/* ALWAYS keep at the end */
> +};
> +
> +enum mtk_mutex_sof_index {
> +	MUTEX_SOF_IDX_SINGLE_MODE,
> +
> +	MUTEX_SOF_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 +42,11 @@ 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_write_mod(struct mtk_mutex *mutex,
> +			enum mtk_mutex_mod_index idx,
> +			bool clear);
> +int mtk_mutex_write_sof(struct mtk_mutex *mutex,
> +			enum mtk_mutex_sof_index idx,
> +			bool clear);
>  
>  #endif /* MTK_MUTEX_H */