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dmaengine: edma: Remove dynamic TPTC power management feature
The dynamic or on demand pm_runtime does not work correctly on am335x and
am437x due to interference with hwmod.
Fall back using the pm_runtime usage as it was in the old driver stack,
meaning that at probe time call pm_runtime_enable() and
pm_runtime_get_sync() for the TPTCs as well.
Fixes: 1be5336bc7
("dmaengine: edma: New device tree binding")
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reported-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
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f55532a0c0
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@ -1570,32 +1570,6 @@ static irqreturn_t dma_ccerr_handler(int irq, void *data)
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return IRQ_HANDLED;
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}
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static void edma_tc_set_pm_state(struct edma_tc *tc, bool enable)
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{
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struct platform_device *tc_pdev;
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int ret;
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if (!IS_ENABLED(CONFIG_OF) || !tc)
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return;
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tc_pdev = of_find_device_by_node(tc->node);
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if (!tc_pdev) {
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pr_err("%s: TPTC device is not found\n", __func__);
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return;
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}
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if (!pm_runtime_enabled(&tc_pdev->dev))
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pm_runtime_enable(&tc_pdev->dev);
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if (enable)
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ret = pm_runtime_get_sync(&tc_pdev->dev);
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else
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ret = pm_runtime_put_sync(&tc_pdev->dev);
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if (ret < 0)
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pr_err("%s: pm_runtime_%s_sync() failed for %s\n", __func__,
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enable ? "get" : "put", dev_name(&tc_pdev->dev));
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}
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/* Alloc channel resources */
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static int edma_alloc_chan_resources(struct dma_chan *chan)
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{
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@ -1632,8 +1606,6 @@ static int edma_alloc_chan_resources(struct dma_chan *chan)
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EDMA_CHAN_SLOT(echan->ch_num), chan->chan_id,
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echan->hw_triggered ? "HW" : "SW");
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edma_tc_set_pm_state(echan->tc, true);
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return 0;
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err_slot:
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@ -1670,7 +1642,6 @@ static void edma_free_chan_resources(struct dma_chan *chan)
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echan->alloced = false;
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}
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edma_tc_set_pm_state(echan->tc, false);
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echan->tc = NULL;
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echan->hw_triggered = false;
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@ -2417,10 +2388,8 @@ static int edma_pm_suspend(struct device *dev)
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int i;
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for (i = 0; i < ecc->num_channels; i++) {
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if (echan[i].alloced) {
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if (echan[i].alloced)
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edma_setup_interrupt(&echan[i], false);
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edma_tc_set_pm_state(echan[i].tc, false);
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}
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}
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return 0;
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@ -2450,8 +2419,6 @@ static int edma_pm_resume(struct device *dev)
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/* Set up channel -> slot mapping for the entry slot */
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edma_set_chmap(&echan[i], echan[i].slot[0]);
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edma_tc_set_pm_state(echan[i].tc, true);
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}
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}
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@ -2475,7 +2442,8 @@ static struct platform_driver edma_driver = {
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static int edma_tptc_probe(struct platform_device *pdev)
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{
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return 0;
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pm_runtime_enable(&pdev->dev);
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return pm_runtime_get_sync(&pdev->dev);
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}
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static struct platform_driver edma_tptc_driver = {
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