Hi Moudy,
> #define MT2701_MUTEX0_MOD0 0x2c
> #define MT2701_MUTEX0_SOF0 0x30
> @@ -180,6 +184,9 @@ struct mtk_mutex_ctx {
> void __iomem *regs;
> struct mtk_mutex mutex[10];
> const struct mtk_mutex_data *data;
> + phys_addr_t addr;
> + struct cmdq_client_reg cmdq_reg;
> + bool has_gce_client_reg;
> };
>
...snip...
> static const unsigned int mt2701_mutex_mod[DDP_COMPONENT_ID_MAX] = {
> @@ -638,6 +645,29 @@ void mtk_mutex_enable(struct mtk_mutex *mutex)
> }
> EXPORT_SYMBOL_GPL(mtk_mutex_enable);
>
> +void mtk_mutex_enable_by_cmdq(struct mtk_mutex *mutex, void *pkt)
> +{
> +#if IS_REACHABLE(CONFIG_MTK_CMDQ)
> + struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
> + mutex[mutex->id]);
> + struct cmdq_pkt *cmdq_pkt = (struct cmdq_pkt *)pkt;
> +
> + WARN_ON(&mtx->mutex[mutex->id] != mutex);
> +
> + if (!mtx->has_gce_client_reg) {
> + dev_dbg(mtx->dev, "mediatek,gce-client-reg hasn't been set in dts");
> + return;
> + }
> +
> + cmdq_pkt_write_mask(cmdq_pkt, mtx->cmdq_reg.subsys,
> + mtx->addr + DISP_REG_MUTEX_EN(mutex->id),
> + MTK_MUTEX_ENABLE, MTK_MUTEX_ENABLE);
We do not check if mtx->addr is valid.
> +#else
> + dev_dbg(mtx->dev, "Not support for enable MUTEX by CMDQ");
> +#endif
> +}
> +EXPORT_SYMBOL_GPL(mtk_mutex_enable_by_cmdq);
> +
> void mtk_mutex_disable(struct mtk_mutex *mutex)
> {
> struct mtk_mutex_ctx *mtx = container_of(mutex, struct mtk_mutex_ctx,
> @@ -676,7 +706,7 @@ static int mtk_mutex_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> struct mtk_mutex_ctx *mtx;
> - struct resource *regs;
> + struct resource *regs, addr;
> int i;
>
> mtx = devm_kzalloc(dev, sizeof(*mtx), GFP_KERNEL);
> @@ -697,6 +727,19 @@ static int mtk_mutex_probe(struct platform_device *pdev)
> }
> }
>
> + if (of_address_to_resource(dev->of_node, 0, &addr) < 0)
> + mtx->addr = 0L;
addr is phys_addr_t, which means that it holds a physical address.
0 may be a valid address in some platforms, so I think
we should not set mtx->addr = 0L when of_address_to_resource fails.
Maybe probe fail by returning dev_err_probe()?
Thanks,
Miles
