gpu: ipu-v3: add driver for Prefetch Resolve Gasket (ea9c2605) · Commits · 戴 / test

drivers/gpu/ipu-v3/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -2,4 +2,4 @@ obj-$(CONFIG_IMX_IPUV3_CORE) += imx-ipu-v3.o

		imx-ipu-v3-objs := ipu-common.o ipu-cpmem.o ipu-csi.o ipu-dc.o ipu-di.o \
		ipu-dp.o ipu-dmfc.o ipu-ic.o ipu-image-convert.o \
		ipu-pre.o ipu-smfc.o ipu-vdi.o
		ipu-pre.o ipu-prg.o ipu-smfc.o ipu-vdi.o

drivers/gpu/ipu-v3/ipu-common.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1530,6 +1530,7 @@ static struct platform_driver imx_ipu_driver = {

		static struct platform_driver * const drivers[] = {
		&ipu_pre_drv,
		&ipu_prg_drv,
		&imx_ipu_driver,
		};

drivers/gpu/ipu-v3/ipu-prg.c

0 → 100644

+424 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2016-2017 Lucas Stach, Pengutronix
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms and conditions of the GNU General Public License,
		* version 2, as published by the Free Software Foundation.
		*
		* This program is distributed in the hope it will be useful, but WITHOUT
		* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
		* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
		* more details.
		*/

		#include <drm/drm_fourcc.h>
		#include <linux/clk.h>
		#include <linux/err.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/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);
		prg->id = ipu_id;
		return prg;
		}
		}
		mutex_unlock(&ipu_prg_list_mutex);

		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;

		return true;
		}
		EXPORT_SYMBOL_GPL(ipu_prg_format_supported);

		int ipu_prg_enable(struct ipu_soc *ipu)
		{
		struct ipu_prg *prg = ipu->prg_priv;
		int ret;

		if (!prg)
		return 0;

		ret = clk_prepare_enable(prg->clk_axi);
		if (ret)
		goto fail_disable_ipg;

		return 0;

		fail_disable_ipg:
		clk_disable_unprepare(prg->clk_ipg);

		return ret;
		}
		EXPORT_SYMBOL_GPL(ipu_prg_enable);

		void ipu_prg_disable(struct ipu_soc *ipu)
		{
		struct ipu_prg *prg = ipu->prg_priv;

		if (!prg)
		return;

		clk_disable_unprepare(prg->clk_axi);
		}
		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 = &prg->chan[prg_chan];
		u32 val;

		if (!chan->enabled \|\| prg_chan < 0)
		return;

		clk_prepare_enable(prg->clk_ipg);

		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);

		clk_disable_unprepare(prg->clk_ipg);

		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, 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 = &prg->chan[prg_chan];
		u32 val;
		int ret;

		if (prg_chan < 0)
		return 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, *eba);


		ret = clk_prepare_enable(prg->clk_ipg);
		if (ret) {
		ipu_prg_put_pre(prg, prg_chan);
		return ret;
		}

		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);
		/* counter load enable */
		val \|= IPU_PRG_CTL_CNT_LOAD_EN(prg_chan);
		/* 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);

		clk_disable_unprepare(prg->clk_ipg);

		chan->enabled = true;
		return 0;
		}
		EXPORT_SYMBOL_GPL(ipu_prg_channel_configure);

		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;

		/* 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);

		clk_disable_unprepare(prg->clk_ipg);

		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;
		}

		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",
		.of_match_table = ipu_prg_dt_ids,
		},
		};

drivers/gpu/ipu-v3/ipu-prv.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -174,6 +174,7 @@ struct ipu_vdi;
		struct ipu_image_convert_priv;
		struct ipu_smfc_priv;
		struct ipu_pre;
		struct ipu_prg;

		struct ipu_devtype;

		@@ -208,6 +209,7 @@ struct ipu_soc {
		struct ipu_vdi *vdi_priv;
		struct ipu_image_convert_priv *image_convert_priv;
		struct ipu_smfc_priv *smfc_priv;
		struct ipu_prg *prg_priv;
		};

		static inline u32 ipu_idmac_read(struct ipu_soc *ipu, unsigned offset)
		@@ -276,6 +278,10 @@ void ipu_pre_configure(struct ipu_pre *pre, unsigned int width,
		unsigned int stride, u32 format, unsigned int bufaddr);
		void ipu_pre_update(struct ipu_pre *pre, unsigned int bufaddr);

		struct ipu_prg ipu_prg_lookup_by_phandle(struct device dev, const char *name,
		int ipu_id);

		extern struct platform_driver ipu_pre_drv;
		extern struct platform_driver ipu_prg_drv;

		#endif /* __IPU_PRV_H__ */

include/video/imx-ipu-v3.h

+15 −0

Original line number	Diff line number	Diff line
		@@ -330,6 +330,21 @@ int ipu_dp_set_window_pos(struct ipu_dp *, u16 x_pos, u16 y_pos);
		int ipu_dp_set_global_alpha(struct ipu_dp *dp, bool enable, u8 alpha,
		bool bg_chan);

		/*
		* IPU Prefetch Resolve Gasket (prg) functions
		*/
		int ipu_prg_max_active_channels(void);
		bool ipu_prg_present(struct ipu_soc *ipu);
		bool ipu_prg_format_supported(struct ipu_soc *ipu, uint32_t format,
		uint64_t modifier);
		int ipu_prg_enable(struct ipu_soc *ipu);
		void ipu_prg_disable(struct ipu_soc *ipu);
		void ipu_prg_channel_disable(struct ipuv3_channel *ipu_chan);
		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, unsigned long *eba);

		/*
		* IPU CMOS Sensor Interface (csi) functions
		*/

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