diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/tegra186-gpc-dma.c | 37 |
1 files changed, 30 insertions, 7 deletions
diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c index fa9bda4a2bc6..1d1180db6d4e 100644 --- a/drivers/dma/tegra186-gpc-dma.c +++ b/drivers/dma/tegra186-gpc-dma.c @@ -161,7 +161,10 @@ #define TEGRA_GPCDMA_BURST_COMPLETION_TIMEOUT 5000 /* 5 msec */ /* Channel base address offset from GPCDMA base address */ -#define TEGRA_GPCDMA_CHANNEL_BASE_ADD_OFFSET 0x20000 +#define TEGRA_GPCDMA_CHANNEL_BASE_ADDR_OFFSET 0x10000 + +/* Default channel mask reserving channel0 */ +#define TEGRA_GPCDMA_DEFAULT_CHANNEL_MASK 0xfffffffe struct tegra_dma; struct tegra_dma_channel; @@ -246,6 +249,7 @@ struct tegra_dma { const struct tegra_dma_chip_data *chip_data; unsigned long sid_m2d_reserved; unsigned long sid_d2m_reserved; + u32 chan_mask; void __iomem *base_addr; struct device *dev; struct dma_device dma_dev; @@ -1288,7 +1292,7 @@ static struct dma_chan *tegra_dma_of_xlate(struct of_phandle_args *dma_spec, } static const struct tegra_dma_chip_data tegra186_dma_chip_data = { - .nr_channels = 31, + .nr_channels = 32, .channel_reg_size = SZ_64K, .max_dma_count = SZ_1G, .hw_support_pause = false, @@ -1296,7 +1300,7 @@ static const struct tegra_dma_chip_data tegra186_dma_chip_data = { }; static const struct tegra_dma_chip_data tegra194_dma_chip_data = { - .nr_channels = 31, + .nr_channels = 32, .channel_reg_size = SZ_64K, .max_dma_count = SZ_1G, .hw_support_pause = true, @@ -1304,7 +1308,7 @@ static const struct tegra_dma_chip_data tegra194_dma_chip_data = { }; static const struct tegra_dma_chip_data tegra234_dma_chip_data = { - .nr_channels = 31, + .nr_channels = 32, .channel_reg_size = SZ_64K, .max_dma_count = SZ_1G, .hw_support_pause = true, @@ -1380,15 +1384,28 @@ static int tegra_dma_probe(struct platform_device *pdev) } stream_id = iommu_spec->ids[0] & 0xffff; + ret = device_property_read_u32(&pdev->dev, "dma-channel-mask", + &tdma->chan_mask); + if (ret) { + dev_warn(&pdev->dev, + "Missing dma-channel-mask property, using default channel mask %#x\n", + TEGRA_GPCDMA_DEFAULT_CHANNEL_MASK); + tdma->chan_mask = TEGRA_GPCDMA_DEFAULT_CHANNEL_MASK; + } + INIT_LIST_HEAD(&tdma->dma_dev.channels); for (i = 0; i < cdata->nr_channels; i++) { struct tegra_dma_channel *tdc = &tdma->channels[i]; + /* Check for channel mask */ + if (!(tdma->chan_mask & BIT(i))) + continue; + tdc->irq = platform_get_irq(pdev, i); if (tdc->irq < 0) return tdc->irq; - tdc->chan_base_offset = TEGRA_GPCDMA_CHANNEL_BASE_ADD_OFFSET + + tdc->chan_base_offset = TEGRA_GPCDMA_CHANNEL_BASE_ADDR_OFFSET + i * cdata->channel_reg_size; snprintf(tdc->name, sizeof(tdc->name), "gpcdma.%d", i); tdc->tdma = tdma; @@ -1449,8 +1466,8 @@ static int tegra_dma_probe(struct platform_device *pdev) return ret; } - dev_info(&pdev->dev, "GPC DMA driver register %d channels\n", - cdata->nr_channels); + dev_info(&pdev->dev, "GPC DMA driver register %lu channels\n", + hweight_long(tdma->chan_mask)); return 0; } @@ -1473,6 +1490,9 @@ static int __maybe_unused tegra_dma_pm_suspend(struct device *dev) for (i = 0; i < tdma->chip_data->nr_channels; i++) { struct tegra_dma_channel *tdc = &tdma->channels[i]; + if (!(tdma->chan_mask & BIT(i))) + continue; + if (tdc->dma_desc) { dev_err(tdma->dev, "channel %u busy\n", i); return -EBUSY; @@ -1492,6 +1512,9 @@ static int __maybe_unused tegra_dma_pm_resume(struct device *dev) for (i = 0; i < tdma->chip_data->nr_channels; i++) { struct tegra_dma_channel *tdc = &tdma->channels[i]; + if (!(tdma->chan_mask & BIT(i))) + continue; + tegra_dma_program_sid(tdc, tdc->stream_id); } |