drivers/gpu/drm/mediatek/mtk_ethdr.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2021 MediaTek Inc.
  */

 #include <drm/drm_blend.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/platform_device.h>
 #include <linux/reset.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>
 #include <linux/soc/mediatek/mtk-mmsys.h>

 #include "mtk_crtc.h"
 #include "mtk_ddp_comp.h"
 #include "mtk_drm_drv.h"
 #include "mtk_ethdr.h"

 #define MIX_INTEN			0x4
 #define MIX_FME_CPL_INTEN			BIT(1)
 #define MIX_INTSTA			0x8
 #define MIX_EN				0xc
 #define MIX_RST				0x14
 #define MIX_ROI_SIZE			0x18
 #define MIX_DATAPATH_CON		0x1c
 #define OUTPUT_NO_RND				BIT(3)
 #define SOURCE_RGB_SEL				BIT(7)
 #define BACKGROUND_RELAY			(4 << 9)
 #define MIX_ROI_BGCLR			0x20
 #define BGCLR_BLACK				0xff000000
 #define MIX_SRC_CON			0x24
 #define MIX_SRC_L0_EN				BIT(0)
 #define MIX_L_SRC_CON(n)		(0x28 + 0x18 * (n))
 #define NON_PREMULTI_SOURCE			(2 << 12)
 #define PREMULTI_SOURCE				(3 << 12)
 #define MIX_L_SRC_SIZE(n)		(0x30 + 0x18 * (n))
 #define MIX_L_SRC_OFFSET(n)		(0x34 + 0x18 * (n))
 #define MIX_FUNC_DCM0			0x120
 #define MIX_FUNC_DCM1			0x124
 #define MIX_FUNC_DCM_ENABLE			0xffffffff

 #define HDR_VDO_FE_0804_HDR_DM_FE	0x804
 #define HDR_VDO_FE_0804_BYPASS_ALL		0xfd
 #define HDR_GFX_FE_0204_GFX_HDR_FE	0x204
 #define HDR_GFX_FE_0204_BYPASS_ALL		0xfd
 #define HDR_VDO_BE_0204_VDO_DM_BE	0x204
 #define HDR_VDO_BE_0204_BYPASS_ALL		0x7e

 #define MIXER_INX_MODE_BYPASS			0
 #define MIXER_INX_MODE_EVEN_EXTEND		1
 #define	MIXER_ALPHA_AEN				BIT(8)
 #define	MIXER_ALPHA				0xff
 #define ETHDR_CLK_NUM				13

 enum mtk_ethdr_comp_id {
 	ETHDR_MIXER,
 	ETHDR_VDO_FE0,
 	ETHDR_VDO_FE1,
 	ETHDR_GFX_FE0,
 	ETHDR_GFX_FE1,
 	ETHDR_VDO_BE,
 	ETHDR_ADL_DS,
 	ETHDR_ID_MAX
 };

 struct mtk_ethdr_comp {
 	struct device		*dev;
 	void __iomem		*regs;
 	struct cmdq_client_reg	cmdq_base;
 };

 struct mtk_ethdr {
 	struct mtk_ethdr_comp	ethdr_comp[ETHDR_ID_MAX];
 	struct clk_bulk_data	ethdr_clk[ETHDR_CLK_NUM];
 	struct device		*mmsys_dev;
 	void			(*vblank_cb)(void *data);
 	void			*vblank_cb_data;
 	int			irq;
 	struct reset_control	*reset_ctl;
 };

 static const char * const ethdr_clk_str[] = {
 	"ethdr_top",
 	"mixer",
 	"vdo_fe0",
 	"vdo_fe1",
 	"gfx_fe0",
 	"gfx_fe1",
 	"vdo_be",
 	"adl_ds",
 	"vdo_fe0_async",
 	"vdo_fe1_async",
 	"gfx_fe0_async",
 	"gfx_fe1_async",
 	"vdo_be_async",
 };

 void mtk_ethdr_register_vblank_cb(struct device *dev,
 				  void (*vblank_cb)(void *),
 				  void *vblank_cb_data)
 {
 	struct mtk_ethdr *priv = dev_get_drvdata(dev);

 	priv->vblank_cb = vblank_cb;
 	priv->vblank_cb_data = vblank_cb_data;
 }

 void mtk_ethdr_unregister_vblank_cb(struct device *dev)
 {
 	struct mtk_ethdr *priv = dev_get_drvdata(dev);

 	priv->vblank_cb = NULL;
 	priv->vblank_cb_data = NULL;
 }

 void mtk_ethdr_enable_vblank(struct device *dev)
 {
 	struct mtk_ethdr *priv = dev_get_drvdata(dev);

 	writel(MIX_FME_CPL_INTEN, priv->ethdr_comp[ETHDR_MIXER].regs + MIX_INTEN);
 }

 void mtk_ethdr_disable_vblank(struct device *dev)
 {
 	struct mtk_ethdr *priv = dev_get_drvdata(dev);

 	writel(0x0, priv->ethdr_comp[ETHDR_MIXER].regs + MIX_INTEN);
 }

 static irqreturn_t mtk_ethdr_irq_handler(int irq, void *dev_id)
 {
 	struct mtk_ethdr *priv = dev_id;

 	writel(0x0, priv->ethdr_comp[ETHDR_MIXER].regs + MIX_INTSTA);

 	if (!priv->vblank_cb)
 		return IRQ_NONE;

 	priv->vblank_cb(priv->vblank_cb_data);

 	return IRQ_HANDLED;
 }

 u32 mtk_ethdr_get_blend_modes(struct device *dev)
 {
 	return BIT(DRM_MODE_BLEND_PREMULTI) |
 	       BIT(DRM_MODE_BLEND_COVERAGE) |
 	       BIT(DRM_MODE_BLEND_PIXEL_NONE);
 }

 void mtk_ethdr_layer_config(struct device *dev, unsigned int idx,
 			    struct mtk_plane_state *state,
 			    struct cmdq_pkt *cmdq_pkt)
 {
 	struct mtk_ethdr *priv = dev_get_drvdata(dev);
 	struct mtk_ethdr_comp *mixer = &priv->ethdr_comp[ETHDR_MIXER];
 	struct mtk_plane_pending_state *pending = &state->pending;
 	unsigned int offset = (pending->x & 1) << 31 | pending->y << 16 | pending->x;
 	unsigned int align_width = ALIGN_DOWN(pending->width, 2);
 	unsigned int alpha_con = 0;
 	bool replace_src_a = false;

 	dev_dbg(dev, "%s+ idx:%d", __func__, idx);

 	if (idx >= 4)
 		return;

 	if (!pending->enable || !pending->width || !pending->height) {
 		/*
 		 * instead of disabling layer with MIX_SRC_CON directly
 		 * set the size to 0 to avoid screen shift due to mixer
 		 * mode switch (hardware behavior)
 		 */
 		mtk_ddp_write(cmdq_pkt, 0, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_SIZE(idx));
 		return;
 	}

 	if (state->base.fb) {
 		alpha_con |= MIXER_ALPHA_AEN;
 		alpha_con |= state->base.alpha & MIXER_ALPHA;
 	}

 	if (state->base.pixel_blend_mode == DRM_MODE_BLEND_PREMULTI)
 		alpha_con |= PREMULTI_SOURCE;
 	else
 		alpha_con |= NON_PREMULTI_SOURCE;

 	if ((state->base.fb && !state->base.fb->format->has_alpha) ||
 	    state->base.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE) {
 		/*
 		 * Mixer doesn't support CONST_BLD mode,
 		 * use a trick to make the output equivalent
 		 */
 		replace_src_a = true;
 	}

 	mtk_mmsys_mixer_in_config(priv->mmsys_dev, idx + 1, replace_src_a,
 				  MIXER_ALPHA,
 				  pending->x & 1 ? MIXER_INX_MODE_EVEN_EXTEND :
 				  MIXER_INX_MODE_BYPASS, align_width / 2 - 1, cmdq_pkt);

 	mtk_ddp_write(cmdq_pkt, pending->height << 16 | align_width, &mixer->cmdq_base,
 		      mixer->regs, MIX_L_SRC_SIZE(idx));
 	mtk_ddp_write(cmdq_pkt, offset, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_OFFSET(idx));
 	mtk_ddp_write(cmdq_pkt, alpha_con, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_CON(idx));
 	mtk_ddp_write_mask(cmdq_pkt, BIT(idx), &mixer->cmdq_base, mixer->regs, MIX_SRC_CON,
 			   BIT(idx));
 }

 void mtk_ethdr_config(struct device *dev, unsigned int w,
 		      unsigned int h, unsigned int vrefresh,
 		      unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
 {
 	struct mtk_ethdr *priv = dev_get_drvdata(dev);
 	struct mtk_ethdr_comp *vdo_fe0 = &priv->ethdr_comp[ETHDR_VDO_FE0];
 	struct mtk_ethdr_comp *vdo_fe1 = &priv->ethdr_comp[ETHDR_VDO_FE1];
 	struct mtk_ethdr_comp *gfx_fe0 = &priv->ethdr_comp[ETHDR_GFX_FE0];
 	struct mtk_ethdr_comp *gfx_fe1 = &priv->ethdr_comp[ETHDR_GFX_FE1];
 	struct mtk_ethdr_comp *vdo_be = &priv->ethdr_comp[ETHDR_VDO_BE];
 	struct mtk_ethdr_comp *mixer = &priv->ethdr_comp[ETHDR_MIXER];

 	dev_dbg(dev, "%s-w:%d, h:%d\n", __func__, w, h);

 	mtk_ddp_write(cmdq_pkt, HDR_VDO_FE_0804_BYPASS_ALL, &vdo_fe0->cmdq_base,
 		      vdo_fe0->regs, HDR_VDO_FE_0804_HDR_DM_FE);

 	mtk_ddp_write(cmdq_pkt, HDR_VDO_FE_0804_BYPASS_ALL, &vdo_fe1->cmdq_base,
 		      vdo_fe1->regs, HDR_VDO_FE_0804_HDR_DM_FE);

 	mtk_ddp_write(cmdq_pkt, HDR_GFX_FE_0204_BYPASS_ALL, &gfx_fe0->cmdq_base,
 		      gfx_fe0->regs, HDR_GFX_FE_0204_GFX_HDR_FE);

 	mtk_ddp_write(cmdq_pkt, HDR_GFX_FE_0204_BYPASS_ALL, &gfx_fe1->cmdq_base,
 		      gfx_fe1->regs, HDR_GFX_FE_0204_GFX_HDR_FE);

 	mtk_ddp_write(cmdq_pkt, HDR_VDO_BE_0204_BYPASS_ALL, &vdo_be->cmdq_base,
 		      vdo_be->regs, HDR_VDO_BE_0204_VDO_DM_BE);

 	mtk_ddp_write(cmdq_pkt, MIX_FUNC_DCM_ENABLE, &mixer->cmdq_base, mixer->regs, MIX_FUNC_DCM0);
 	mtk_ddp_write(cmdq_pkt, MIX_FUNC_DCM_ENABLE, &mixer->cmdq_base, mixer->regs, MIX_FUNC_DCM1);
 	mtk_ddp_write(cmdq_pkt, h << 16 | w, &mixer->cmdq_base, mixer->regs, MIX_ROI_SIZE);
 	mtk_ddp_write(cmdq_pkt, BGCLR_BLACK, &mixer->cmdq_base, mixer->regs, MIX_ROI_BGCLR);
 	mtk_ddp_write(cmdq_pkt, NON_PREMULTI_SOURCE, &mixer->cmdq_base, mixer->regs,
 		      MIX_L_SRC_CON(0));
 	mtk_ddp_write(cmdq_pkt, NON_PREMULTI_SOURCE, &mixer->cmdq_base, mixer->regs,
 		      MIX_L_SRC_CON(1));
 	mtk_ddp_write(cmdq_pkt, NON_PREMULTI_SOURCE, &mixer->cmdq_base, mixer->regs,
 		      MIX_L_SRC_CON(2));
 	mtk_ddp_write(cmdq_pkt, NON_PREMULTI_SOURCE, &mixer->cmdq_base, mixer->regs,
 		      MIX_L_SRC_CON(3));
 	mtk_ddp_write(cmdq_pkt, 0x0, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_SIZE(0));
 	mtk_ddp_write(cmdq_pkt, OUTPUT_NO_RND | SOURCE_RGB_SEL | BACKGROUND_RELAY,
 		      &mixer->cmdq_base, mixer->regs, MIX_DATAPATH_CON);
 	mtk_ddp_write_mask(cmdq_pkt, MIX_SRC_L0_EN, &mixer->cmdq_base, mixer->regs,
 			   MIX_SRC_CON, MIX_SRC_L0_EN);

 	mtk_mmsys_hdr_config(priv->mmsys_dev, w / 2, h, cmdq_pkt);
 	mtk_mmsys_mixer_in_channel_swap(priv->mmsys_dev, 4, 0, cmdq_pkt);
 }

 void mtk_ethdr_start(struct device *dev)
 {
 	struct mtk_ethdr *priv = dev_get_drvdata(dev);
 	struct mtk_ethdr_comp *mixer = &priv->ethdr_comp[ETHDR_MIXER];

 	writel(1, mixer->regs + MIX_EN);
 }

 void mtk_ethdr_stop(struct device *dev)
 {
 	struct mtk_ethdr *priv = dev_get_drvdata(dev);
 	struct mtk_ethdr_comp *mixer = &priv->ethdr_comp[ETHDR_MIXER];

 	writel(0, mixer->regs + MIX_EN);
 	writel(1, mixer->regs + MIX_RST);
 	reset_control_reset(priv->reset_ctl);
 	writel(0, mixer->regs + MIX_RST);
 }

 int mtk_ethdr_clk_enable(struct device *dev)
 {
 	int ret;
 	struct mtk_ethdr *priv = dev_get_drvdata(dev);

 	ret = clk_bulk_prepare_enable(ETHDR_CLK_NUM, priv->ethdr_clk);
 	if (ret)
 		dev_err(dev,
 			"ethdr_clk prepare enable failed\n");
 	return ret;
 }

 void mtk_ethdr_clk_disable(struct device *dev)
 {
 	struct mtk_ethdr *priv = dev_get_drvdata(dev);

 	clk_bulk_disable_unprepare(ETHDR_CLK_NUM, priv->ethdr_clk);
 }

 static int mtk_ethdr_bind(struct device *dev, struct device *master,
 			  void *data)
 {
 	struct mtk_ethdr *priv = dev_get_drvdata(dev);

 	priv->mmsys_dev = data;
 	return 0;
 }

 static void mtk_ethdr_unbind(struct device *dev, struct device *master, void *data)
 {
 }

 static const struct component_ops mtk_ethdr_component_ops = {
 	.bind	= mtk_ethdr_bind,
 	.unbind = mtk_ethdr_unbind,
 };

 static int mtk_ethdr_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct mtk_ethdr *priv;
 	int ret;
 	int i;

 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	for (i = 0; i < ETHDR_ID_MAX; i++) {
 		priv->ethdr_comp[i].dev = dev;
 		priv->ethdr_comp[i].regs = of_iomap(dev->of_node, i);
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 		ret = cmdq_dev_get_client_reg(dev,
 					      &priv->ethdr_comp[i].cmdq_base, i);
 		if (ret)
 			dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
 #endif
 		dev_dbg(dev, "[DRM]regs:0x%p, node:%d\n", priv->ethdr_comp[i].regs, i);
 	}

 	for (i = 0; i < ETHDR_CLK_NUM; i++)
 		priv->ethdr_clk[i].id = ethdr_clk_str[i];
 	ret = devm_clk_bulk_get_optional(dev, ETHDR_CLK_NUM, priv->ethdr_clk);
 	if (ret)
 		return ret;

 	priv->irq = platform_get_irq(pdev, 0);
 	if (priv->irq < 0)
 		priv->irq = 0;

 	if (priv->irq) {
 		ret = devm_request_irq(dev, priv->irq, mtk_ethdr_irq_handler,
 				       IRQF_TRIGGER_NONE, dev_name(dev), priv);
 		if (ret < 0)
 			return dev_err_probe(dev, ret,
 					     "Failed to request irq %d\n",
 					     priv->irq);
 	}

 	priv->reset_ctl = devm_reset_control_array_get_optional_exclusive(dev);
 	if (IS_ERR(priv->reset_ctl))
 		return dev_err_probe(dev, PTR_ERR(priv->reset_ctl),
 				     "cannot get ethdr reset control\n");

 	platform_set_drvdata(pdev, priv);

 	ret = component_add(dev, &mtk_ethdr_component_ops);
 	if (ret)
 		return dev_err_probe(dev, ret, "Failed to add component\n");

 	return 0;
 }

 static void mtk_ethdr_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &mtk_ethdr_component_ops);
 }

 static const struct of_device_id mtk_ethdr_driver_dt_match[] = {
 	{ .compatible = "mediatek,mt8195-disp-ethdr"},
 	{},
 };

 MODULE_DEVICE_TABLE(of, mtk_ethdr_driver_dt_match);

 struct platform_driver mtk_ethdr_driver = {
 	.probe		= mtk_ethdr_probe,
 	.remove_new	= mtk_ethdr_remove,
 	.driver		= {
 		.name	= "mediatek-disp-ethdr",
 		.of_match_table = mtk_ethdr_driver_dt_match,
 	},
 };
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* Copyright (c) 2021 MediaTek Inc.
	*/

	#include <drm/drm_blend.h>
	#include <drm/drm_fourcc.h>
	#include <drm/drm_framebuffer.h>
	#include <linux/clk.h>
	#include <linux/component.h>
	#include <linux/of.h>
	#include <linux/of_address.h>
	#include <linux/platform_device.h>
	#include <linux/reset.h>
	#include <linux/soc/mediatek/mtk-cmdq.h>
	#include <linux/soc/mediatek/mtk-mmsys.h>

	#include "mtk_crtc.h"
	#include "mtk_ddp_comp.h"
	#include "mtk_drm_drv.h"
	#include "mtk_ethdr.h"

	#define MIX_INTEN 0x4
	#define MIX_FME_CPL_INTEN BIT(1)
	#define MIX_INTSTA 0x8
	#define MIX_EN 0xc
	#define MIX_RST 0x14
	#define MIX_ROI_SIZE 0x18
	#define MIX_DATAPATH_CON 0x1c
	#define OUTPUT_NO_RND BIT(3)
	#define SOURCE_RGB_SEL BIT(7)
	#define BACKGROUND_RELAY (4 << 9)
	#define MIX_ROI_BGCLR 0x20
	#define BGCLR_BLACK 0xff000000
	#define MIX_SRC_CON 0x24
	#define MIX_SRC_L0_EN BIT(0)
	#define MIX_L_SRC_CON(n) (0x28 + 0x18 * (n))
	#define NON_PREMULTI_SOURCE (2 << 12)
	#define PREMULTI_SOURCE (3 << 12)
	#define MIX_L_SRC_SIZE(n) (0x30 + 0x18 * (n))
	#define MIX_L_SRC_OFFSET(n) (0x34 + 0x18 * (n))
	#define MIX_FUNC_DCM0 0x120
	#define MIX_FUNC_DCM1 0x124
	#define MIX_FUNC_DCM_ENABLE 0xffffffff

	#define HDR_VDO_FE_0804_HDR_DM_FE 0x804
	#define HDR_VDO_FE_0804_BYPASS_ALL 0xfd
	#define HDR_GFX_FE_0204_GFX_HDR_FE 0x204
	#define HDR_GFX_FE_0204_BYPASS_ALL 0xfd
	#define HDR_VDO_BE_0204_VDO_DM_BE 0x204
	#define HDR_VDO_BE_0204_BYPASS_ALL 0x7e

	#define MIXER_INX_MODE_BYPASS 0
	#define MIXER_INX_MODE_EVEN_EXTEND 1
	#define MIXER_ALPHA_AEN BIT(8)
	#define MIXER_ALPHA 0xff
	#define ETHDR_CLK_NUM 13

	enum mtk_ethdr_comp_id {
	ETHDR_MIXER,
	ETHDR_VDO_FE0,
	ETHDR_VDO_FE1,
	ETHDR_GFX_FE0,
	ETHDR_GFX_FE1,
	ETHDR_VDO_BE,
	ETHDR_ADL_DS,
	ETHDR_ID_MAX
	};

	struct mtk_ethdr_comp {
	struct device *dev;
	void __iomem *regs;
	struct cmdq_client_reg cmdq_base;
	};

	struct mtk_ethdr {
	struct mtk_ethdr_comp ethdr_comp[ETHDR_ID_MAX];
	struct clk_bulk_data ethdr_clk[ETHDR_CLK_NUM];
	struct device *mmsys_dev;
	void (vblank_cb)(void data);
	void *vblank_cb_data;
	int irq;
	struct reset_control *reset_ctl;
	};

	static const char * const ethdr_clk_str[] = {
	"ethdr_top",
	"mixer",
	"vdo_fe0",
	"vdo_fe1",
	"gfx_fe0",
	"gfx_fe1",
	"vdo_be",
	"adl_ds",
	"vdo_fe0_async",
	"vdo_fe1_async",
	"gfx_fe0_async",
	"gfx_fe1_async",
	"vdo_be_async",
	};

	void mtk_ethdr_register_vblank_cb(struct device *dev,
	void (vblank_cb)(void ),
	void *vblank_cb_data)
	{
	struct mtk_ethdr *priv = dev_get_drvdata(dev);

	priv->vblank_cb = vblank_cb;
	priv->vblank_cb_data = vblank_cb_data;
	}

	void mtk_ethdr_unregister_vblank_cb(struct device *dev)
	{
	struct mtk_ethdr *priv = dev_get_drvdata(dev);

	priv->vblank_cb = NULL;
	priv->vblank_cb_data = NULL;
	}

	void mtk_ethdr_enable_vblank(struct device *dev)
	{
	struct mtk_ethdr *priv = dev_get_drvdata(dev);

	writel(MIX_FME_CPL_INTEN, priv->ethdr_comp[ETHDR_MIXER].regs + MIX_INTEN);
	}

	void mtk_ethdr_disable_vblank(struct device *dev)
	{
	struct mtk_ethdr *priv = dev_get_drvdata(dev);

	writel(0x0, priv->ethdr_comp[ETHDR_MIXER].regs + MIX_INTEN);
	}

	static irqreturn_t mtk_ethdr_irq_handler(int irq, void *dev_id)
	{
	struct mtk_ethdr *priv = dev_id;

	writel(0x0, priv->ethdr_comp[ETHDR_MIXER].regs + MIX_INTSTA);

	if (!priv->vblank_cb)
	return IRQ_NONE;

	priv->vblank_cb(priv->vblank_cb_data);

	return IRQ_HANDLED;
	}

	u32 mtk_ethdr_get_blend_modes(struct device *dev)
	{
	return BIT(DRM_MODE_BLEND_PREMULTI) \|
	BIT(DRM_MODE_BLEND_COVERAGE) \|
	BIT(DRM_MODE_BLEND_PIXEL_NONE);
	}

	void mtk_ethdr_layer_config(struct device *dev, unsigned int idx,
	struct mtk_plane_state *state,
	struct cmdq_pkt *cmdq_pkt)
	{
	struct mtk_ethdr *priv = dev_get_drvdata(dev);
	struct mtk_ethdr_comp *mixer = &priv->ethdr_comp[ETHDR_MIXER];
	struct mtk_plane_pending_state *pending = &state->pending;
	unsigned int offset = (pending->x & 1) << 31 \| pending->y << 16 \| pending->x;
	unsigned int align_width = ALIGN_DOWN(pending->width, 2);
	unsigned int alpha_con = 0;
	bool replace_src_a = false;

	dev_dbg(dev, "%s+ idx:%d", __func__, idx);

	if (idx >= 4)
	return;

	if (!pending->enable \|\| !pending->width \|\| !pending->height) {
	/*
	* instead of disabling layer with MIX_SRC_CON directly
	* set the size to 0 to avoid screen shift due to mixer
	* mode switch (hardware behavior)
	*/
	mtk_ddp_write(cmdq_pkt, 0, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_SIZE(idx));
	return;
	}

	if (state->base.fb) {
	alpha_con \|= MIXER_ALPHA_AEN;
	alpha_con \|= state->base.alpha & MIXER_ALPHA;
	}

	if (state->base.pixel_blend_mode == DRM_MODE_BLEND_PREMULTI)
	alpha_con \|= PREMULTI_SOURCE;
	else
	alpha_con \|= NON_PREMULTI_SOURCE;

	if ((state->base.fb && !state->base.fb->format->has_alpha) \|\|
	state->base.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE) {
	/*
	* Mixer doesn't support CONST_BLD mode,
	* use a trick to make the output equivalent
	*/
	replace_src_a = true;
	}

	mtk_mmsys_mixer_in_config(priv->mmsys_dev, idx + 1, replace_src_a,
	MIXER_ALPHA,
	pending->x & 1 ? MIXER_INX_MODE_EVEN_EXTEND :
	MIXER_INX_MODE_BYPASS, align_width / 2 - 1, cmdq_pkt);

	mtk_ddp_write(cmdq_pkt, pending->height << 16 \| align_width, &mixer->cmdq_base,
	mixer->regs, MIX_L_SRC_SIZE(idx));
	mtk_ddp_write(cmdq_pkt, offset, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_OFFSET(idx));
	mtk_ddp_write(cmdq_pkt, alpha_con, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_CON(idx));
	mtk_ddp_write_mask(cmdq_pkt, BIT(idx), &mixer->cmdq_base, mixer->regs, MIX_SRC_CON,
	BIT(idx));
	}

	void mtk_ethdr_config(struct device *dev, unsigned int w,
	unsigned int h, unsigned int vrefresh,
	unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
	{
	struct mtk_ethdr *priv = dev_get_drvdata(dev);
	struct mtk_ethdr_comp *vdo_fe0 = &priv->ethdr_comp[ETHDR_VDO_FE0];
	struct mtk_ethdr_comp *vdo_fe1 = &priv->ethdr_comp[ETHDR_VDO_FE1];
	struct mtk_ethdr_comp *gfx_fe0 = &priv->ethdr_comp[ETHDR_GFX_FE0];
	struct mtk_ethdr_comp *gfx_fe1 = &priv->ethdr_comp[ETHDR_GFX_FE1];
	struct mtk_ethdr_comp *vdo_be = &priv->ethdr_comp[ETHDR_VDO_BE];
	struct mtk_ethdr_comp *mixer = &priv->ethdr_comp[ETHDR_MIXER];

	dev_dbg(dev, "%s-w:%d, h:%d\n", __func__, w, h);

	mtk_ddp_write(cmdq_pkt, HDR_VDO_FE_0804_BYPASS_ALL, &vdo_fe0->cmdq_base,
	vdo_fe0->regs, HDR_VDO_FE_0804_HDR_DM_FE);

	mtk_ddp_write(cmdq_pkt, HDR_VDO_FE_0804_BYPASS_ALL, &vdo_fe1->cmdq_base,
	vdo_fe1->regs, HDR_VDO_FE_0804_HDR_DM_FE);

	mtk_ddp_write(cmdq_pkt, HDR_GFX_FE_0204_BYPASS_ALL, &gfx_fe0->cmdq_base,
	gfx_fe0->regs, HDR_GFX_FE_0204_GFX_HDR_FE);

	mtk_ddp_write(cmdq_pkt, HDR_GFX_FE_0204_BYPASS_ALL, &gfx_fe1->cmdq_base,
	gfx_fe1->regs, HDR_GFX_FE_0204_GFX_HDR_FE);

	mtk_ddp_write(cmdq_pkt, HDR_VDO_BE_0204_BYPASS_ALL, &vdo_be->cmdq_base,
	vdo_be->regs, HDR_VDO_BE_0204_VDO_DM_BE);

	mtk_ddp_write(cmdq_pkt, MIX_FUNC_DCM_ENABLE, &mixer->cmdq_base, mixer->regs, MIX_FUNC_DCM0);
	mtk_ddp_write(cmdq_pkt, MIX_FUNC_DCM_ENABLE, &mixer->cmdq_base, mixer->regs, MIX_FUNC_DCM1);
	mtk_ddp_write(cmdq_pkt, h << 16 \| w, &mixer->cmdq_base, mixer->regs, MIX_ROI_SIZE);
	mtk_ddp_write(cmdq_pkt, BGCLR_BLACK, &mixer->cmdq_base, mixer->regs, MIX_ROI_BGCLR);
	mtk_ddp_write(cmdq_pkt, NON_PREMULTI_SOURCE, &mixer->cmdq_base, mixer->regs,
	MIX_L_SRC_CON(0));
	mtk_ddp_write(cmdq_pkt, NON_PREMULTI_SOURCE, &mixer->cmdq_base, mixer->regs,
	MIX_L_SRC_CON(1));
	mtk_ddp_write(cmdq_pkt, NON_PREMULTI_SOURCE, &mixer->cmdq_base, mixer->regs,
	MIX_L_SRC_CON(2));
	mtk_ddp_write(cmdq_pkt, NON_PREMULTI_SOURCE, &mixer->cmdq_base, mixer->regs,
	MIX_L_SRC_CON(3));
	mtk_ddp_write(cmdq_pkt, 0x0, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_SIZE(0));
	mtk_ddp_write(cmdq_pkt, OUTPUT_NO_RND \| SOURCE_RGB_SEL \| BACKGROUND_RELAY,
	&mixer->cmdq_base, mixer->regs, MIX_DATAPATH_CON);
	mtk_ddp_write_mask(cmdq_pkt, MIX_SRC_L0_EN, &mixer->cmdq_base, mixer->regs,
	MIX_SRC_CON, MIX_SRC_L0_EN);

	mtk_mmsys_hdr_config(priv->mmsys_dev, w / 2, h, cmdq_pkt);
	mtk_mmsys_mixer_in_channel_swap(priv->mmsys_dev, 4, 0, cmdq_pkt);
	}

	void mtk_ethdr_start(struct device *dev)
	{
	struct mtk_ethdr *priv = dev_get_drvdata(dev);
	struct mtk_ethdr_comp *mixer = &priv->ethdr_comp[ETHDR_MIXER];

	writel(1, mixer->regs + MIX_EN);
	}

	void mtk_ethdr_stop(struct device *dev)
	{
	struct mtk_ethdr *priv = dev_get_drvdata(dev);
	struct mtk_ethdr_comp *mixer = &priv->ethdr_comp[ETHDR_MIXER];

	writel(0, mixer->regs + MIX_EN);
	writel(1, mixer->regs + MIX_RST);
	reset_control_reset(priv->reset_ctl);
	writel(0, mixer->regs + MIX_RST);
	}

	int mtk_ethdr_clk_enable(struct device *dev)
	{
	int ret;
	struct mtk_ethdr *priv = dev_get_drvdata(dev);

	ret = clk_bulk_prepare_enable(ETHDR_CLK_NUM, priv->ethdr_clk);
	if (ret)
	dev_err(dev,
	"ethdr_clk prepare enable failed\n");
	return ret;
	}

	void mtk_ethdr_clk_disable(struct device *dev)
	{
	struct mtk_ethdr *priv = dev_get_drvdata(dev);

	clk_bulk_disable_unprepare(ETHDR_CLK_NUM, priv->ethdr_clk);
	}

	static int mtk_ethdr_bind(struct device dev, struct device master,
	void *data)
	{
	struct mtk_ethdr *priv = dev_get_drvdata(dev);

	priv->mmsys_dev = data;
	return 0;
	}

	static void mtk_ethdr_unbind(struct device dev, struct device master, void *data)
	{
	}

	static const struct component_ops mtk_ethdr_component_ops = {
	.bind = mtk_ethdr_bind,
	.unbind = mtk_ethdr_unbind,
	};

	static int mtk_ethdr_probe(struct platform_device *pdev)
	{
	struct device *dev = &pdev->dev;
	struct mtk_ethdr *priv;
	int ret;
	int i;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	for (i = 0; i < ETHDR_ID_MAX; i++) {
	priv->ethdr_comp[i].dev = dev;
	priv->ethdr_comp[i].regs = of_iomap(dev->of_node, i);
	#if IS_REACHABLE(CONFIG_MTK_CMDQ)
	ret = cmdq_dev_get_client_reg(dev,
	&priv->ethdr_comp[i].cmdq_base, i);
	if (ret)
	dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
	#endif
	dev_dbg(dev, "[DRM]regs:0x%p, node:%d\n", priv->ethdr_comp[i].regs, i);
	}

	for (i = 0; i < ETHDR_CLK_NUM; i++)
	priv->ethdr_clk[i].id = ethdr_clk_str[i];
	ret = devm_clk_bulk_get_optional(dev, ETHDR_CLK_NUM, priv->ethdr_clk);
	if (ret)
	return ret;

	priv->irq = platform_get_irq(pdev, 0);
	if (priv->irq < 0)
	priv->irq = 0;

	if (priv->irq) {
	ret = devm_request_irq(dev, priv->irq, mtk_ethdr_irq_handler,
	IRQF_TRIGGER_NONE, dev_name(dev), priv);
	if (ret < 0)
	return dev_err_probe(dev, ret,
	"Failed to request irq %d\n",
	priv->irq);
	}

	priv->reset_ctl = devm_reset_control_array_get_optional_exclusive(dev);
	if (IS_ERR(priv->reset_ctl))
	return dev_err_probe(dev, PTR_ERR(priv->reset_ctl),
	"cannot get ethdr reset control\n");

	platform_set_drvdata(pdev, priv);

	ret = component_add(dev, &mtk_ethdr_component_ops);
	if (ret)
	return dev_err_probe(dev, ret, "Failed to add component\n");

	return 0;
	}

	static void mtk_ethdr_remove(struct platform_device *pdev)
	{
	component_del(&pdev->dev, &mtk_ethdr_component_ops);
	}

	static const struct of_device_id mtk_ethdr_driver_dt_match[] = {
	{ .compatible = "mediatek,mt8195-disp-ethdr"},
	{},
	};

	MODULE_DEVICE_TABLE(of, mtk_ethdr_driver_dt_match);

	struct platform_driver mtk_ethdr_driver = {
	.probe = mtk_ethdr_probe,
	.remove_new = mtk_ethdr_remove,
	.driver = {
	.name = "mediatek-disp-ethdr",
	.of_match_table = mtk_ethdr_driver_dt_match,
	},
	};