diff options
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_g2d.c | 78 |
1 files changed, 56 insertions, 22 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c index 0bffd349fcad..7252faeae2cf 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c +++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c @@ -138,6 +138,18 @@ enum g2d_reg_type { MAX_REG_TYPE_NR }; +enum g2d_flag_bits { + /* + * If set, suspends the runqueue worker after the currently + * processed node is finished. + */ + G2D_BIT_SUSPEND_RUNQUEUE, + /* + * If set, indicates that the engine is currently busy. + */ + G2D_BIT_ENGINE_BUSY, +}; + /* cmdlist data structure */ struct g2d_cmdlist { u32 head; @@ -226,7 +238,7 @@ struct g2d_data { struct workqueue_struct *g2d_workq; struct work_struct runqueue_work; struct exynos_drm_subdrv subdrv; - bool suspended; + unsigned long flags; /* cmdlist */ struct g2d_cmdlist_node *cmdlist_node; @@ -803,12 +815,8 @@ static void g2d_dma_start(struct g2d_data *g2d, struct g2d_cmdlist_node *node = list_first_entry(&runqueue_node->run_cmdlist, struct g2d_cmdlist_node, list); - int ret; - - ret = pm_runtime_get_sync(g2d->dev); - if (ret < 0) - return; + set_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags); writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR); writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND); } @@ -858,18 +866,37 @@ static void g2d_runqueue_worker(struct work_struct *work) { struct g2d_data *g2d = container_of(work, struct g2d_data, runqueue_work); + struct g2d_runqueue_node *runqueue_node; + + /* + * The engine is busy and the completion of the current node is going + * to poke the runqueue worker, so nothing to do here. + */ + if (test_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags)) + return; mutex_lock(&g2d->runqueue_mutex); - pm_runtime_put_sync(g2d->dev); - complete(&g2d->runqueue_node->complete); - if (g2d->runqueue_node->async) - g2d_free_runqueue_node(g2d, g2d->runqueue_node); + runqueue_node = g2d->runqueue_node; + g2d->runqueue_node = NULL; + + if (runqueue_node) { + pm_runtime_put(g2d->dev); + + complete(&runqueue_node->complete); + if (runqueue_node->async) + g2d_free_runqueue_node(g2d, runqueue_node); + } + + if (!test_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags)) { + g2d->runqueue_node = g2d_get_runqueue_node(g2d); + + if (g2d->runqueue_node) { + pm_runtime_get_sync(g2d->dev); + g2d_dma_start(g2d, g2d->runqueue_node); + } + } - if (g2d->suspended) - g2d->runqueue_node = NULL; - else - g2d_exec_runqueue(g2d); mutex_unlock(&g2d->runqueue_mutex); } @@ -918,8 +945,10 @@ static irqreturn_t g2d_irq_handler(int irq, void *dev_id) } } - if (pending & G2D_INTP_ACMD_FIN) + if (pending & G2D_INTP_ACMD_FIN) { + clear_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags); queue_work(g2d->g2d_workq, &g2d->runqueue_work); + } return IRQ_HANDLED; } @@ -1259,10 +1288,11 @@ int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data, runqueue_node->pid = current->pid; runqueue_node->filp = file; list_add_tail(&runqueue_node->list, &g2d->runqueue); - if (!g2d->runqueue_node) - g2d_exec_runqueue(g2d); mutex_unlock(&g2d->runqueue_mutex); + /* Let the runqueue know that there is work to do. */ + queue_work(g2d->g2d_workq, &g2d->runqueue_work); + if (runqueue_node->async) goto out; @@ -1400,6 +1430,8 @@ static int g2d_probe(struct platform_device *pdev) } pm_runtime_enable(dev); + clear_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags); + clear_bit(G2D_BIT_ENGINE_BUSY, &g2d->flags); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -1458,6 +1490,9 @@ static int g2d_remove(struct platform_device *pdev) { struct g2d_data *g2d = platform_get_drvdata(pdev); + /* Suspend runqueue operation. */ + set_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags); + cancel_work_sync(&g2d->runqueue_work); exynos_drm_subdrv_unregister(&g2d->subdrv); @@ -1480,9 +1515,8 @@ static int g2d_suspend(struct device *dev) { struct g2d_data *g2d = dev_get_drvdata(dev); - mutex_lock(&g2d->runqueue_mutex); - g2d->suspended = true; - mutex_unlock(&g2d->runqueue_mutex); + /* Suspend runqueue operation. */ + set_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags); while (g2d->runqueue_node) /* FIXME: good range? */ @@ -1497,8 +1531,8 @@ static int g2d_resume(struct device *dev) { struct g2d_data *g2d = dev_get_drvdata(dev); - g2d->suspended = false; - g2d_exec_runqueue(g2d); + clear_bit(G2D_BIT_SUSPEND_RUNQUEUE, &g2d->flags); + queue_work(g2d->g2d_workq, &g2d->runqueue_work); return 0; } |