From fbbdd32f90080e6f4628291469334f2a847f1868 Mon Sep 17 00:00:00 2001 From: Thomas Makin Date: Wed, 5 Nov 2025 05:55:09 +0000 Subject: [PATCH] [DEBUG] emc logging --- drivers/memory/tegra/tegra186-emc.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/memory/tegra/tegra186-emc.c b/drivers/memory/tegra/tegra186-emc.c index 3021e76d8478..92651f9daab3 100644 --- a/drivers/memory/tegra/tegra186-emc.c +++ b/drivers/memory/tegra/tegra186-emc.c @@ -395,8 +395,12 @@ static int tegra_emc_interconnect_init(struct tegra186_emc *emc) emc->provider.xlate = tegra_emc_of_icc_xlate; emc->provider.get_bw = tegra_emc_icc_get_init_bw; + printk("186-emc: init icc provider\n"); + icc_provider_init(&emc->provider); + printk("186-emc: create icc node\n"); + /* create External Memory Controller node */ node = icc_node_create(TEGRA_ICC_EMC); if (IS_ERR(node)) { @@ -404,14 +408,20 @@ static int tegra_emc_interconnect_init(struct tegra186_emc *emc) goto err_msg; } + printk("186-emc: add icc node\n"); + node->name = "External Memory Controller"; icc_node_add(node, &emc->provider); + printk("186-emc: link emc icc to dram\n"); + /* link External Memory Controller to External Memory (DRAM) */ err = icc_link_create(node, TEGRA_ICC_EMEM); if (err) goto remove_nodes; + printk("186-emc: create dram node\n"); + /* create External Memory node */ node = icc_node_create(TEGRA_ICC_EMEM); if (IS_ERR(node)) { @@ -419,16 +429,23 @@ static int tegra_emc_interconnect_init(struct tegra186_emc *emc) goto remove_nodes; } + printk("186-emc: add dram node\n"); + node->name = "External Memory (DRAM)"; icc_node_add(node, &emc->provider); + printk("186-emc: register icc provider\n"); + err = icc_provider_register(&emc->provider); if (err) goto remove_nodes; + printk("186-emc: icc init success\n"); + return 0; remove_nodes: + printk("186-emc: removing icc nodes\n"); icc_nodes_remove(&emc->provider); err_msg: dev_err(emc->dev, "failed to initialize ICC: %d\n", err); @@ -460,16 +477,24 @@ static int tegra186_emc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, emc); emc->dev = &pdev->dev; + printk("186-emc: emc_rate_requests_init\n"); + tegra_emc_rate_requests_init(emc); + printk("186-emc: mrq supported?\n"); + if (tegra_bpmp_mrq_is_supported(emc->bpmp, MRQ_EMC_DVFS_LATENCY)) { + printk("186-emc: mrq supported\n"); err = tegra186_emc_get_emc_dvfs_latency(emc); if (err) goto put_bpmp; + printk("186-emc: got emc dvfs latency\n"); } if (mc && mc->soc->icc_ops) { + printk("186-emc: icc ops -> mrq supported?\n"); if (tegra_bpmp_mrq_is_supported(emc->bpmp, MRQ_BWMGR_INT)) { + printk("186-emc: mrq supported, configuring mc\n"); mc->bwmgr_mrq_supported = true; /* @@ -481,6 +506,8 @@ static int tegra186_emc_probe(struct platform_device *pdev) barrier(); } + printk("186-emc: init emc interconnect\n"); + /* * Initialize the ICC even if BPMP-FW doesn't support 'MRQ_BWMGR_INT'. * Use the flag 'mc->bwmgr_mrq_supported' within MC driver and return @@ -497,6 +524,7 @@ static int tegra186_emc_probe(struct platform_device *pdev) return 0; put_bpmp: + printk("186-emc: FAILED\n"); tegra_bpmp_put(emc->bpmp); return err; }