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From: Dmitry Osipenko <digetx@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Peter De Schrijver <pdeschrijver@nvidia.com>,
	Mikko Perttunen <mperttunen@nvidia.com>,
	Georgi Djakov <georgi.djakov@linaro.org>,
	Rob Herring <robh+dt@kernel.org>
Cc: linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	devicetree@vger.kernel.org
Subject: [PATCH v1 19/29] memory: tegra20-emc: Register as interconnect provider
Date: Mon, 18 Nov 2019 23:02:37 +0300	[thread overview]
Message-ID: <20191118200247.3567-20-digetx@gmail.com> (raw)
In-Reply-To: <20191118200247.3567-1-digetx@gmail.com>

EMC now provides MC with memory bandwidth using interconnect API.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/memory/tegra/tegra20-emc.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c
index 28bd9fd4c3c9..61ce422e102a 100644
--- a/drivers/memory/tegra/tegra20-emc.c
+++ b/drivers/memory/tegra/tegra20-emc.c
@@ -19,6 +19,7 @@
 #include <linux/types.h>
 
 #include <soc/tegra/fuse.h>
+#include <soc/tegra/mc.h>
 
 #define EMC_INTSTATUS				0x000
 #define EMC_INTMASK				0x004
@@ -87,6 +88,8 @@
 #define EMC_DBG_READ_DQM_CTRL			BIT(9)
 #define EMC_DBG_CFG_PRIORITY			BIT(24)
 
+#define EMC_FBIO_CFG5_DRAM_WIDTH_X16		BIT(4)
+
 static const u16 emc_timing_registers[] = {
 	EMC_RC,
 	EMC_RFC,
@@ -486,10 +489,27 @@ static long emc_round_rate(unsigned long rate,
 	return timing->rate;
 }
 
+static unsigned int emc_dram_data_bus_width_bytes(struct tegra_emc *emc)
+{
+	unsigned int bus_width;
+	u32 emc_cfg;
+
+	emc_cfg = readl_relaxed(emc->regs + EMC_FBIO_CFG5);
+	if (emc_cfg & EMC_FBIO_CFG5_DRAM_WIDTH_X16)
+		bus_width = 16;
+	else
+		bus_width = 32;
+
+	dev_info(emc->dev, "DRAM data-bus width: %ubit\n", bus_width);
+
+	return bus_width / 8;
+}
+
 static int tegra_emc_probe(struct platform_device *pdev)
 {
 	struct device_node *np;
 	struct tegra_emc *emc;
+	unsigned int bus_width;
 	int irq, err;
 
 	emc = devm_kzalloc(&pdev->dev, sizeof(*emc), GFP_KERNEL);
@@ -549,6 +569,12 @@ static int tegra_emc_probe(struct platform_device *pdev)
 		goto unset_cb;
 	}
 
+	bus_width = emc_dram_data_bus_width_bytes(emc);
+
+	err = tegra_icc_emc_setup_interconnect(&pdev->dev, bus_width);
+	if (err)
+		dev_err(&pdev->dev, "failed to initialize ICC: %d\n", err);
+
 	return 0;
 
 unset_cb:
-- 
2.23.0


  parent reply	other threads:[~2019-11-18 20:05 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-18 20:02 [PATCH v1 00/29] Introduce memory interconnect for NVIDIA Tegra SoCs Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 01/29] dt-bindings: memory: tegra20: mc: Document new interconnect property Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 02/29] dt-bindings: memory: tegra20: emc: " Dmitry Osipenko
2019-11-19  6:21   ` Thierry Reding
2019-11-19 16:57     ` Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 03/29] dt-bindings: memory: tegra30: mc: " Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 04/29] dt-bindings: memory: tegra30: emc: " Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 05/29] dt-bindings: memory: tegra124: mc: " Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 06/29] dt-bindings: memory: tegra124: emc: " Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 07/29] dt-bindings: host1x: Document new interconnect properties Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 08/29] dt-bindings: interconnect: tegra: Add initial IDs Dmitry Osipenko
2019-11-19  6:25   ` Thierry Reding
2019-11-19 16:56     ` Dmitry Osipenko
2019-11-21 17:14       ` Dmitry Osipenko
2019-11-25 11:32         ` Thierry Reding
2019-11-28 20:06           ` Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 09/29] ARM: tegra: Add interconnect properties to Tegra20 device-tree Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 10/29] ARM: tegra: Add interconnect properties to Tegra30 device-tree Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 11/29] ARM: tegra: Add interconnect properties to Tegra124 device-tree Dmitry Osipenko
2019-11-19  6:27   ` Thierry Reding
2019-11-18 20:02 ` [PATCH v1 12/29] interconnect: Add memory interconnection providers for NVIDIA Tegra SoCs Dmitry Osipenko
2019-11-19  6:30   ` Thierry Reding
2019-11-19 16:58     ` Dmitry Osipenko
2019-11-21 17:33       ` Dmitry Osipenko
2019-11-19  6:31   ` Thierry Reding
2019-11-19 16:59     ` Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 13/29] memory: tegra: Register as interconnect provider Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 14/29] memory: tegra: Add interconnect nodes for Terga20 display controllers Dmitry Osipenko
2019-11-19  6:34   ` Thierry Reding
2019-11-18 20:02 ` [PATCH v1 15/29] memory: tegra: Add interconnect nodes for Terga30 " Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 16/29] memory: tegra: Add interconnect nodes for Terga124 " Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 17/29] memory: tegra20-emc: Use devm_platform_ioremap_resource Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 18/29] memory: tegra20-emc: Continue probing if timings/IRQ are missing in device-tree Dmitry Osipenko
2019-11-18 20:02 ` Dmitry Osipenko [this message]
2019-11-18 20:02 ` [PATCH v1 20/29] memory: tegra30-emc: Continue probing if timings " Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 21/29] memory: tegra30-emc: Register as interconnect provider Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 22/29] memory: tegra124-emc: Use devm_platform_ioremap_resource Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 23/29] memory: tegra124-emc: Register as interconnect provider Dmitry Osipenko
2019-11-19 16:57   ` Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 24/29] drm/tegra: dc: Use devm_platform_ioremap_resource Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 25/29] drm/tegra: dc: Release PM and RGB output when client's registration fails Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 26/29] drm/tegra: dc: Support memory bandwidth management Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 27/29] ARM: tegra: Enable interconnect API in tegra_defconfig Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 28/29] ARM: multi_v7_defconfig: Enable NVIDIA Tegra interconnect providers Dmitry Osipenko
2019-11-18 20:02 ` [PATCH v1 29/29] MAINTAINERS: Add maintainers for NVIDIA Tegra interconnect drivers Dmitry Osipenko
2019-11-19  6:19 ` [PATCH v1 00/29] Introduce memory interconnect for NVIDIA Tegra SoCs Thierry Reding

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