diff options
Diffstat (limited to 'drivers/media/platform/verisilicon/hantro_drv.c')
| -rw-r--r-- | drivers/media/platform/verisilicon/hantro_drv.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/media/platform/verisilicon/hantro_drv.c b/drivers/media/platform/verisilicon/hantro_drv.c index 34b123dafd89..05bbac853c4f 100644 --- a/drivers/media/platform/verisilicon/hantro_drv.c +++ b/drivers/media/platform/verisilicon/hantro_drv.c @@ -722,6 +722,7 @@ static const struct of_device_id of_hantro_match[] = { { .compatible = "rockchip,rk3399-vpu", .data = &rk3399_vpu_variant, }, { .compatible = "rockchip,rk3568-vepu", .data = &rk3568_vepu_variant, }, { .compatible = "rockchip,rk3568-vpu", .data = &rk3568_vpu_variant, }, + { .compatible = "rockchip,rk3588-vepu121", .data = &rk3568_vepu_variant, }, { .compatible = "rockchip,rk3588-av1-vpu", .data = &rk3588_vpu981_variant, }, #endif #ifdef CONFIG_VIDEO_HANTRO_IMX8M @@ -992,6 +993,49 @@ static const struct media_device_ops hantro_m2m_media_ops = { .req_queue = v4l2_m2m_request_queue, }; +/* + * Some SoCs, like RK3588 have multiple identical Hantro cores, but the + * kernel is currently missing support for multi-core handling. Exposing + * separate devices for each core to userspace is bad, since that does + * not allow scheduling tasks properly (and creates ABI). With this workaround + * the driver will only probe for the first core and early exit for the other + * cores. Once the driver gains multi-core support, the same technique + * for detecting the main core can be used to cluster all cores together. + */ +static int hantro_disable_multicore(struct hantro_dev *vpu) +{ + struct device_node *node = NULL; + const char *compatible; + bool is_main_core; + int ret; + + /* Intentionally ignores the fallback strings */ + ret = of_property_read_string(vpu->dev->of_node, "compatible", &compatible); + if (ret) + return ret; + + /* The first compatible and available node found is considered the main core */ + do { + node = of_find_compatible_node(node, NULL, compatible); + if (of_device_is_available(node)) + break; + } while (node); + + if (!node) + return -EINVAL; + + is_main_core = (vpu->dev->of_node == node); + + of_node_put(node); + + if (!is_main_core) { + dev_info(vpu->dev, "missing multi-core support, ignoring this instance\n"); + return -ENODEV; + } + + return 0; +} + static int hantro_probe(struct platform_device *pdev) { const struct of_device_id *match; @@ -1011,6 +1055,10 @@ static int hantro_probe(struct platform_device *pdev) match = of_match_node(of_hantro_match, pdev->dev.of_node); vpu->variant = match->data; + ret = hantro_disable_multicore(vpu); + if (ret) + return ret; + /* * Support for nxp,imx8mq-vpu is kept for backwards compatibility * but it's deprecated. Please update your DTS file to use |