From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/gpu/ipu-v3/ipu-prg.c | 483 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 483 insertions(+)
 create mode 100644 drivers/gpu/ipu-v3/ipu-prg.c

(limited to 'drivers/gpu/ipu-v3/ipu-prg.c')

diff --git a/drivers/gpu/ipu-v3/ipu-prg.c b/drivers/gpu/ipu-v3/ipu-prg.c
new file mode 100644
index 000000000..196797c1b
--- /dev/null
+++ b/drivers/gpu/ipu-v3/ipu-prg.c
@@ -0,0 +1,483 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2016-2017 Lucas Stach, Pengutronix
+ */
+
+#include <drm/drm_fourcc.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/iopoll.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <video/imx-ipu-v3.h>
+
+#include "ipu-prv.h"
+
+#define IPU_PRG_CTL				0x00
+#define  IPU_PRG_CTL_BYPASS(i)			(1 << (0 + i))
+#define  IPU_PRG_CTL_SOFT_ARID_MASK		0x3
+#define  IPU_PRG_CTL_SOFT_ARID_SHIFT(i)		(8 + i * 2)
+#define  IPU_PRG_CTL_SOFT_ARID(i, v)		((v & 0x3) << (8 + 2 * i))
+#define  IPU_PRG_CTL_SO(i)			(1 << (16 + i))
+#define  IPU_PRG_CTL_VFLIP(i)			(1 << (19 + i))
+#define  IPU_PRG_CTL_BLOCK_MODE(i)		(1 << (22 + i))
+#define  IPU_PRG_CTL_CNT_LOAD_EN(i)		(1 << (25 + i))
+#define  IPU_PRG_CTL_SOFTRST			(1 << 30)
+#define  IPU_PRG_CTL_SHADOW_EN			(1 << 31)
+
+#define IPU_PRG_STATUS				0x04
+#define  IPU_PRG_STATUS_BUFFER0_READY(i)	(1 << (0 + i * 2))
+#define  IPU_PRG_STATUS_BUFFER1_READY(i)	(1 << (1 + i * 2))
+
+#define IPU_PRG_QOS				0x08
+#define  IPU_PRG_QOS_ARID_MASK			0xf
+#define  IPU_PRG_QOS_ARID_SHIFT(i)		(0 + i * 4)
+
+#define IPU_PRG_REG_UPDATE			0x0c
+#define  IPU_PRG_REG_UPDATE_REG_UPDATE		(1 << 0)
+
+#define IPU_PRG_STRIDE(i)			(0x10 + i * 0x4)
+#define  IPU_PRG_STRIDE_STRIDE_MASK		0x3fff
+
+#define IPU_PRG_CROP_LINE			0x1c
+
+#define IPU_PRG_THD				0x20
+
+#define IPU_PRG_BADDR(i)			(0x24 + i * 0x4)
+
+#define IPU_PRG_OFFSET(i)			(0x30 + i * 0x4)
+
+#define IPU_PRG_ILO(i)				(0x3c + i * 0x4)
+
+#define IPU_PRG_HEIGHT(i)			(0x48 + i * 0x4)
+#define  IPU_PRG_HEIGHT_PRE_HEIGHT_MASK		0xfff
+#define  IPU_PRG_HEIGHT_PRE_HEIGHT_SHIFT	0
+#define  IPU_PRG_HEIGHT_IPU_HEIGHT_MASK		0xfff
+#define  IPU_PRG_HEIGHT_IPU_HEIGHT_SHIFT	16
+
+struct ipu_prg_channel {
+	bool			enabled;
+	int			used_pre;
+};
+
+struct ipu_prg {
+	struct list_head	list;
+	struct device		*dev;
+	int			id;
+
+	void __iomem		*regs;
+	struct clk		*clk_ipg, *clk_axi;
+	struct regmap		*iomuxc_gpr;
+	struct ipu_pre		*pres[3];
+
+	struct ipu_prg_channel	chan[3];
+};
+
+static DEFINE_MUTEX(ipu_prg_list_mutex);
+static LIST_HEAD(ipu_prg_list);
+
+struct ipu_prg *
+ipu_prg_lookup_by_phandle(struct device *dev, const char *name, int ipu_id)
+{
+	struct device_node *prg_node = of_parse_phandle(dev->of_node,
+							name, 0);
+	struct ipu_prg *prg;
+
+	mutex_lock(&ipu_prg_list_mutex);
+	list_for_each_entry(prg, &ipu_prg_list, list) {
+		if (prg_node == prg->dev->of_node) {
+			mutex_unlock(&ipu_prg_list_mutex);
+			device_link_add(dev, prg->dev,
+					DL_FLAG_AUTOREMOVE_CONSUMER);
+			prg->id = ipu_id;
+			of_node_put(prg_node);
+			return prg;
+		}
+	}
+	mutex_unlock(&ipu_prg_list_mutex);
+
+	of_node_put(prg_node);
+
+	return NULL;
+}
+
+int ipu_prg_max_active_channels(void)
+{
+	return ipu_pre_get_available_count();
+}
+EXPORT_SYMBOL_GPL(ipu_prg_max_active_channels);
+
+bool ipu_prg_present(struct ipu_soc *ipu)
+{
+	if (ipu->prg_priv)
+		return true;
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(ipu_prg_present);
+
+bool ipu_prg_format_supported(struct ipu_soc *ipu, uint32_t format,
+			      uint64_t modifier)
+{
+	const struct drm_format_info *info = drm_format_info(format);
+
+	if (info->num_planes != 1)
+		return false;
+
+	switch (modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+	case DRM_FORMAT_MOD_VIVANTE_TILED:
+	case DRM_FORMAT_MOD_VIVANTE_SUPER_TILED:
+		return true;
+	default:
+		return false;
+	}
+}
+EXPORT_SYMBOL_GPL(ipu_prg_format_supported);
+
+int ipu_prg_enable(struct ipu_soc *ipu)
+{
+	struct ipu_prg *prg = ipu->prg_priv;
+
+	if (!prg)
+		return 0;
+
+	return pm_runtime_get_sync(prg->dev);
+}
+EXPORT_SYMBOL_GPL(ipu_prg_enable);
+
+void ipu_prg_disable(struct ipu_soc *ipu)
+{
+	struct ipu_prg *prg = ipu->prg_priv;
+
+	if (!prg)
+		return;
+
+	pm_runtime_put(prg->dev);
+}
+EXPORT_SYMBOL_GPL(ipu_prg_disable);
+
+/*
+ * The channel configuartion functions below are not thread safe, as they
+ * must be only called from the atomic commit path in the DRM driver, which
+ * is properly serialized.
+ */
+static int ipu_prg_ipu_to_prg_chan(int ipu_chan)
+{
+	/*
+	 * This isn't clearly documented in the RM, but IPU to PRG channel
+	 * assignment is fixed, as only with this mapping the control signals
+	 * match up.
+	 */
+	switch (ipu_chan) {
+	case IPUV3_CHANNEL_MEM_BG_SYNC:
+		return 0;
+	case IPUV3_CHANNEL_MEM_FG_SYNC:
+		return 1;
+	case IPUV3_CHANNEL_MEM_DC_SYNC:
+		return 2;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ipu_prg_get_pre(struct ipu_prg *prg, int prg_chan)
+{
+	int i, ret;
+
+	/* channel 0 is special as it is hardwired to one of the PREs */
+	if (prg_chan == 0) {
+		ret = ipu_pre_get(prg->pres[0]);
+		if (ret)
+			goto fail;
+		prg->chan[prg_chan].used_pre = 0;
+		return 0;
+	}
+
+	for (i = 1; i < 3; i++) {
+		ret = ipu_pre_get(prg->pres[i]);
+		if (!ret) {
+			u32 val, mux;
+			int shift;
+
+			prg->chan[prg_chan].used_pre = i;
+
+			/* configure the PRE to PRG channel mux */
+			shift = (i == 1) ? 12 : 14;
+			mux = (prg->id << 1) | (prg_chan - 1);
+			regmap_update_bits(prg->iomuxc_gpr, IOMUXC_GPR5,
+					   0x3 << shift, mux << shift);
+
+			/* check other mux, must not point to same channel */
+			shift = (i == 1) ? 14 : 12;
+			regmap_read(prg->iomuxc_gpr, IOMUXC_GPR5, &val);
+			if (((val >> shift) & 0x3) == mux) {
+				regmap_update_bits(prg->iomuxc_gpr, IOMUXC_GPR5,
+						   0x3 << shift,
+						   (mux ^ 0x1) << shift);
+			}
+
+			return 0;
+		}
+	}
+
+fail:
+	dev_err(prg->dev, "could not get PRE for PRG chan %d", prg_chan);
+	return ret;
+}
+
+static void ipu_prg_put_pre(struct ipu_prg *prg, int prg_chan)
+{
+	struct ipu_prg_channel *chan = &prg->chan[prg_chan];
+
+	ipu_pre_put(prg->pres[chan->used_pre]);
+	chan->used_pre = -1;
+}
+
+void ipu_prg_channel_disable(struct ipuv3_channel *ipu_chan)
+{
+	int prg_chan = ipu_prg_ipu_to_prg_chan(ipu_chan->num);
+	struct ipu_prg *prg = ipu_chan->ipu->prg_priv;
+	struct ipu_prg_channel *chan;
+	u32 val;
+
+	if (prg_chan < 0)
+		return;
+
+	chan = &prg->chan[prg_chan];
+	if (!chan->enabled)
+		return;
+
+	pm_runtime_get_sync(prg->dev);
+
+	val = readl(prg->regs + IPU_PRG_CTL);
+	val |= IPU_PRG_CTL_BYPASS(prg_chan);
+	writel(val, prg->regs + IPU_PRG_CTL);
+
+	val = IPU_PRG_REG_UPDATE_REG_UPDATE;
+	writel(val, prg->regs + IPU_PRG_REG_UPDATE);
+
+	pm_runtime_put(prg->dev);
+
+	ipu_prg_put_pre(prg, prg_chan);
+
+	chan->enabled = false;
+}
+EXPORT_SYMBOL_GPL(ipu_prg_channel_disable);
+
+int ipu_prg_channel_configure(struct ipuv3_channel *ipu_chan,
+			      unsigned int axi_id, unsigned int width,
+			      unsigned int height, unsigned int stride,
+			      u32 format, uint64_t modifier, unsigned long *eba)
+{
+	int prg_chan = ipu_prg_ipu_to_prg_chan(ipu_chan->num);
+	struct ipu_prg *prg = ipu_chan->ipu->prg_priv;
+	struct ipu_prg_channel *chan;
+	u32 val;
+	int ret;
+
+	if (prg_chan < 0)
+		return prg_chan;
+
+	chan = &prg->chan[prg_chan];
+
+	if (chan->enabled) {
+		ipu_pre_update(prg->pres[chan->used_pre], *eba);
+		return 0;
+	}
+
+	ret = ipu_prg_get_pre(prg, prg_chan);
+	if (ret)
+		return ret;
+
+	ipu_pre_configure(prg->pres[chan->used_pre],
+			  width, height, stride, format, modifier, *eba);
+
+
+	pm_runtime_get_sync(prg->dev);
+
+	val = (stride - 1) & IPU_PRG_STRIDE_STRIDE_MASK;
+	writel(val, prg->regs + IPU_PRG_STRIDE(prg_chan));
+
+	val = ((height & IPU_PRG_HEIGHT_PRE_HEIGHT_MASK) <<
+	       IPU_PRG_HEIGHT_PRE_HEIGHT_SHIFT) |
+	      ((height & IPU_PRG_HEIGHT_IPU_HEIGHT_MASK) <<
+	       IPU_PRG_HEIGHT_IPU_HEIGHT_SHIFT);
+	writel(val, prg->regs + IPU_PRG_HEIGHT(prg_chan));
+
+	val = ipu_pre_get_baddr(prg->pres[chan->used_pre]);
+	*eba = val;
+	writel(val, prg->regs + IPU_PRG_BADDR(prg_chan));
+
+	val = readl(prg->regs + IPU_PRG_CTL);
+	/* config AXI ID */
+	val &= ~(IPU_PRG_CTL_SOFT_ARID_MASK <<
+		 IPU_PRG_CTL_SOFT_ARID_SHIFT(prg_chan));
+	val |= IPU_PRG_CTL_SOFT_ARID(prg_chan, axi_id);
+	/* enable channel */
+	val &= ~IPU_PRG_CTL_BYPASS(prg_chan);
+	writel(val, prg->regs + IPU_PRG_CTL);
+
+	val = IPU_PRG_REG_UPDATE_REG_UPDATE;
+	writel(val, prg->regs + IPU_PRG_REG_UPDATE);
+
+	/* wait for both double buffers to be filled */
+	readl_poll_timeout(prg->regs + IPU_PRG_STATUS, val,
+			   (val & IPU_PRG_STATUS_BUFFER0_READY(prg_chan)) &&
+			   (val & IPU_PRG_STATUS_BUFFER1_READY(prg_chan)),
+			   5, 1000);
+
+	pm_runtime_put(prg->dev);
+
+	chan->enabled = true;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_prg_channel_configure);
+
+bool ipu_prg_channel_configure_pending(struct ipuv3_channel *ipu_chan)
+{
+	int prg_chan = ipu_prg_ipu_to_prg_chan(ipu_chan->num);
+	struct ipu_prg *prg = ipu_chan->ipu->prg_priv;
+	struct ipu_prg_channel *chan;
+
+	if (prg_chan < 0)
+		return false;
+
+	chan = &prg->chan[prg_chan];
+	WARN_ON(!chan->enabled);
+
+	return ipu_pre_update_pending(prg->pres[chan->used_pre]);
+}
+EXPORT_SYMBOL_GPL(ipu_prg_channel_configure_pending);
+
+static int ipu_prg_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct ipu_prg *prg;
+	u32 val;
+	int i, ret;
+
+	prg = devm_kzalloc(dev, sizeof(*prg), GFP_KERNEL);
+	if (!prg)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	prg->regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(prg->regs))
+		return PTR_ERR(prg->regs);
+
+
+	prg->clk_ipg = devm_clk_get(dev, "ipg");
+	if (IS_ERR(prg->clk_ipg))
+		return PTR_ERR(prg->clk_ipg);
+
+	prg->clk_axi = devm_clk_get(dev, "axi");
+	if (IS_ERR(prg->clk_axi))
+		return PTR_ERR(prg->clk_axi);
+
+	prg->iomuxc_gpr =
+		syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
+	if (IS_ERR(prg->iomuxc_gpr))
+		return PTR_ERR(prg->iomuxc_gpr);
+
+	for (i = 0; i < 3; i++) {
+		prg->pres[i] = ipu_pre_lookup_by_phandle(dev, "fsl,pres", i);
+		if (!prg->pres[i])
+			return -EPROBE_DEFER;
+	}
+
+	ret = clk_prepare_enable(prg->clk_ipg);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(prg->clk_axi);
+	if (ret) {
+		clk_disable_unprepare(prg->clk_ipg);
+		return ret;
+	}
+
+	/* init to free running mode */
+	val = readl(prg->regs + IPU_PRG_CTL);
+	val |= IPU_PRG_CTL_SHADOW_EN;
+	writel(val, prg->regs + IPU_PRG_CTL);
+
+	/* disable address threshold */
+	writel(0xffffffff, prg->regs + IPU_PRG_THD);
+
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+
+	prg->dev = dev;
+	platform_set_drvdata(pdev, prg);
+	mutex_lock(&ipu_prg_list_mutex);
+	list_add(&prg->list, &ipu_prg_list);
+	mutex_unlock(&ipu_prg_list_mutex);
+
+	return 0;
+}
+
+static int ipu_prg_remove(struct platform_device *pdev)
+{
+	struct ipu_prg *prg = platform_get_drvdata(pdev);
+
+	mutex_lock(&ipu_prg_list_mutex);
+	list_del(&prg->list);
+	mutex_unlock(&ipu_prg_list_mutex);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int prg_suspend(struct device *dev)
+{
+	struct ipu_prg *prg = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(prg->clk_axi);
+	clk_disable_unprepare(prg->clk_ipg);
+
+	return 0;
+}
+
+static int prg_resume(struct device *dev)
+{
+	struct ipu_prg *prg = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_prepare_enable(prg->clk_ipg);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(prg->clk_axi);
+	if (ret) {
+		clk_disable_unprepare(prg->clk_ipg);
+		return ret;
+	}
+
+	return 0;
+}
+#endif
+
+static const struct dev_pm_ops prg_pm_ops = {
+	SET_RUNTIME_PM_OPS(prg_suspend, prg_resume, NULL)
+};
+
+static const struct of_device_id ipu_prg_dt_ids[] = {
+	{ .compatible = "fsl,imx6qp-prg", },
+	{ /* sentinel */ },
+};
+
+struct platform_driver ipu_prg_drv = {
+	.probe		= ipu_prg_probe,
+	.remove		= ipu_prg_remove,
+	.driver		= {
+		.name	= "imx-ipu-prg",
+		.pm	= &prg_pm_ops,
+		.of_match_table = ipu_prg_dt_ids,
+	},
+};
-- 
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