diff options
Diffstat (limited to 'drivers/mailbox/mtk-cmdq-mailbox.c')
| -rw-r--r-- | drivers/mailbox/mtk-cmdq-mailbox.c | 80 |
1 files changed, 68 insertions, 12 deletions
diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index 4d62b07c1411..de862e9137d5 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -13,10 +13,13 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/mailbox_controller.h> #include <linux/mailbox/mtk-cmdq-mailbox.h> #include <linux/of.h> +#define CMDQ_MBOX_AUTOSUSPEND_DELAY_MS 100 + #define CMDQ_OP_CODE_MASK (0xff << CMDQ_OP_CODE_SHIFT) #define CMDQ_NUM_CMD(t) (t->cmd_buf_size / CMDQ_INST_SIZE) #define CMDQ_GCE_NUM_MAX (2) @@ -283,10 +286,8 @@ static void cmdq_thread_irq_handler(struct cmdq *cmdq, break; } - if (list_empty(&thread->task_busy_list)) { + if (list_empty(&thread->task_busy_list)) cmdq_thread_disable(cmdq, thread); - clk_bulk_disable(cmdq->pdata->gce_num, cmdq->clocks); - } } static irqreturn_t cmdq_irq_handler(int irq, void *dev) @@ -307,9 +308,26 @@ static irqreturn_t cmdq_irq_handler(int irq, void *dev) spin_unlock_irqrestore(&thread->chan->lock, flags); } + pm_runtime_mark_last_busy(cmdq->mbox.dev); + return IRQ_HANDLED; } +static int cmdq_runtime_resume(struct device *dev) +{ + struct cmdq *cmdq = dev_get_drvdata(dev); + + return clk_bulk_enable(cmdq->pdata->gce_num, cmdq->clocks); +} + +static int cmdq_runtime_suspend(struct device *dev) +{ + struct cmdq *cmdq = dev_get_drvdata(dev); + + clk_bulk_disable(cmdq->pdata->gce_num, cmdq->clocks); + return 0; +} + static int cmdq_suspend(struct device *dev) { struct cmdq *cmdq = dev_get_drvdata(dev); @@ -333,16 +351,14 @@ static int cmdq_suspend(struct device *dev) if (cmdq->pdata->sw_ddr_en) cmdq_sw_ddr_enable(cmdq, false); - clk_bulk_unprepare(cmdq->pdata->gce_num, cmdq->clocks); - - return 0; + return pm_runtime_force_suspend(dev); } static int cmdq_resume(struct device *dev) { struct cmdq *cmdq = dev_get_drvdata(dev); - WARN_ON(clk_bulk_prepare(cmdq->pdata->gce_num, cmdq->clocks)); + WARN_ON(pm_runtime_force_resume(dev)); cmdq->suspended = false; if (cmdq->pdata->sw_ddr_en) @@ -358,6 +374,9 @@ static int cmdq_remove(struct platform_device *pdev) if (cmdq->pdata->sw_ddr_en) cmdq_sw_ddr_enable(cmdq, false); + if (!IS_ENABLED(CONFIG_PM)) + cmdq_runtime_suspend(&pdev->dev); + clk_bulk_unprepare(cmdq->pdata->gce_num, cmdq->clocks); return 0; } @@ -369,13 +388,20 @@ static int cmdq_mbox_send_data(struct mbox_chan *chan, void *data) struct cmdq *cmdq = dev_get_drvdata(chan->mbox->dev); struct cmdq_task *task; unsigned long curr_pa, end_pa; + int ret; /* Client should not flush new tasks if suspended. */ WARN_ON(cmdq->suspended); + ret = pm_runtime_get_sync(cmdq->mbox.dev); + if (ret < 0) + return ret; + task = kzalloc(sizeof(*task), GFP_ATOMIC); - if (!task) + if (!task) { + pm_runtime_put_autosuspend(cmdq->mbox.dev); return -ENOMEM; + } task->cmdq = cmdq; INIT_LIST_HEAD(&task->list_entry); @@ -384,8 +410,6 @@ static int cmdq_mbox_send_data(struct mbox_chan *chan, void *data) task->pkt = pkt; if (list_empty(&thread->task_busy_list)) { - WARN_ON(clk_bulk_enable(cmdq->pdata->gce_num, cmdq->clocks)); - /* * The thread reset will clear thread related register to 0, * including pc, end, priority, irq, suspend and enable. Thus @@ -424,6 +448,9 @@ static int cmdq_mbox_send_data(struct mbox_chan *chan, void *data) } list_move_tail(&task->list_entry, &thread->task_busy_list); + pm_runtime_mark_last_busy(cmdq->mbox.dev); + pm_runtime_put_autosuspend(cmdq->mbox.dev); + return 0; } @@ -439,6 +466,8 @@ static void cmdq_mbox_shutdown(struct mbox_chan *chan) struct cmdq_task *task, *tmp; unsigned long flags; + WARN_ON(pm_runtime_get_sync(cmdq->mbox.dev)); + spin_lock_irqsave(&thread->chan->lock, flags); if (list_empty(&thread->task_busy_list)) goto done; @@ -457,7 +486,6 @@ static void cmdq_mbox_shutdown(struct mbox_chan *chan) } cmdq_thread_disable(cmdq, thread); - clk_bulk_disable(cmdq->pdata->gce_num, cmdq->clocks); done: /* @@ -467,6 +495,9 @@ done: * to do any operation here, only unlock and leave. */ spin_unlock_irqrestore(&thread->chan->lock, flags); + + pm_runtime_mark_last_busy(cmdq->mbox.dev); + pm_runtime_put_autosuspend(cmdq->mbox.dev); } static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout) @@ -477,6 +508,11 @@ static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout) struct cmdq_task *task, *tmp; unsigned long flags; u32 enable; + int ret; + + ret = pm_runtime_get_sync(cmdq->mbox.dev); + if (ret < 0) + return ret; spin_lock_irqsave(&thread->chan->lock, flags); if (list_empty(&thread->task_busy_list)) @@ -497,10 +533,12 @@ static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout) cmdq_thread_resume(thread); cmdq_thread_disable(cmdq, thread); - clk_bulk_disable(cmdq->pdata->gce_num, cmdq->clocks); out: spin_unlock_irqrestore(&thread->chan->lock, flags); + pm_runtime_mark_last_busy(cmdq->mbox.dev); + pm_runtime_put_autosuspend(cmdq->mbox.dev); + return 0; wait: @@ -513,6 +551,8 @@ wait: return -EFAULT; } + pm_runtime_mark_last_busy(cmdq->mbox.dev); + pm_runtime_put_autosuspend(cmdq->mbox.dev); return 0; } @@ -642,12 +682,28 @@ static int cmdq_probe(struct platform_device *pdev) return err; } + /* If Runtime PM is not available enable the clocks now. */ + if (!IS_ENABLED(CONFIG_PM)) { + err = cmdq_runtime_resume(dev); + if (err) + return err; + } + + err = devm_pm_runtime_enable(dev); + if (err) + return err; + + pm_runtime_set_autosuspend_delay(dev, CMDQ_MBOX_AUTOSUSPEND_DELAY_MS); + pm_runtime_use_autosuspend(dev); + return 0; } static const struct dev_pm_ops cmdq_pm_ops = { .suspend = cmdq_suspend, .resume = cmdq_resume, + SET_RUNTIME_PM_OPS(cmdq_runtime_suspend, + cmdq_runtime_resume, NULL) }; static const struct gce_plat gce_plat_v2 = { |