On 21/12/22 22:24, Dmitry Osipenko wrote:
External email: Use caution opening links or attachments 20.12.2022 19:02, Sumit Gupta пишет:static int tegra186_emc_probe(struct platform_device *pdev) { struct mrq_emc_dvfs_latency_response response; struct tegra_bpmp_message msg; struct tegra186_emc *emc; + struct tegra_mc *mc; unsigned int i; int err; @@ -158,6 +307,9 @@ static int tegra186_emc_probe(struct platform_device *pdev) if (!emc) return -ENOMEM; + platform_set_drvdata(pdev, emc); + emc->dev = &pdev->dev; + emc->bpmp = tegra_bpmp_get(&pdev->dev); if (IS_ERR(emc->bpmp)) return dev_err_probe(&pdev->dev, PTR_ERR(emc->bpmp), "failed to get BPMP\n"); @@ -236,6 +388,19 @@ static int tegra186_emc_probe(struct platform_device *pdev) debugfs_create_file("max_rate", S_IRUGO | S_IWUSR, emc->debugfs.root, emc, &tegra186_emc_debug_max_rate_fops); + mc = dev_get_drvdata(emc->dev->parent); + if (mc && mc->soc->icc_ops) { + if (tegra_bpmp_mrq_is_supported(emc->bpmp, MRQ_BWMGR_INT)) { + err = tegra_emc_interconnect_init(emc); + if (!err) + return err; + dev_err(&pdev->dev, "tegra_emc_interconnect_init failed:%d\n", err); + goto put_bpmp; + } else { + dev_info(&pdev->dev, "MRQ_BWMGR_INT not present\n"); + }If there is no MRQ_BWMGR_INT, then device drivers using ICC won't probe. This is either a error condition, or ICC should inited and then ICC changes should be skipped.
If the MRQ_BW_MGR is not supported by a BPMP-FW binary, then the MC & EMC drivers will still probe successfully and scaling will be disabled.
