diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_drv.c | 41 |
1 files changed, 31 insertions, 10 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c index 7dcc6392792d..0b756ecb1bc2 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c @@ -589,6 +589,7 @@ static int compare_str(struct device *dev, void *data) static int etnaviv_pdev_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct device_node *first_node = NULL; struct component_match *match = NULL; if (!dev->platform_data) { @@ -598,6 +599,9 @@ static int etnaviv_pdev_probe(struct platform_device *pdev) if (!of_device_is_available(core_node)) continue; + if (!first_node) + first_node = core_node; + drm_of_component_match_add(&pdev->dev, &match, compare_of, core_node); } @@ -609,6 +613,32 @@ static int etnaviv_pdev_probe(struct platform_device *pdev) component_match_add(dev, &match, compare_str, names[i]); } + /* + * PTA and MTLB can have 40 bit base addresses, but + * unfortunately, an entry in the MTLB can only point to a + * 32 bit base address of a STLB. Moreover, to initialize the + * MMU we need a command buffer with a 32 bit address because + * without an MMU there is only an indentity mapping between + * the internal 32 bit addresses and the bus addresses. + * + * To make things easy, we set the dma_coherent_mask to 32 + * bit to make sure we are allocating the command buffers and + * TLBs in the lower 4 GiB address space. + */ + if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(40)) || + dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32))) { + dev_dbg(&pdev->dev, "No suitable DMA available\n"); + return -ENODEV; + } + + /* + * Apply the same DMA configuration to the virtual etnaviv + * device as the GPU we found. This assumes that all Vivante + * GPUs in the system share the same DMA constraints. + */ + if (first_node) + of_dma_configure(&pdev->dev, first_node, true); + return component_master_add_with_match(dev, &etnaviv_master_ops, match); } @@ -653,21 +683,12 @@ static int __init etnaviv_init(void) if (!of_device_is_available(np)) continue; - pdev = platform_device_alloc("etnaviv", -1); + pdev = platform_device_alloc("etnaviv", PLATFORM_DEVID_NONE); if (!pdev) { ret = -ENOMEM; of_node_put(np); goto unregister_platform_driver; } - pdev->dev.coherent_dma_mask = DMA_BIT_MASK(40); - pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; - - /* - * Apply the same DMA configuration to the virtual etnaviv - * device as the GPU we found. This assumes that all Vivante - * GPUs in the system share the same DMA constraints. - */ - of_dma_configure(&pdev->dev, np, true); ret = platform_device_add(pdev); if (ret) { |