exynos_drm_scaler.c

/*
 * Copyright (C) 2017 Samsung Electronics Co.Ltd
 * Author:
 *	Andrzej Pietrasiewicz <andrzej.p@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundationr
 */

#include <linux/kernel.h>
#include <linux/component.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>

#include <drm/drmP.h>
#include <drm/exynos_drm.h>
#include "regs-scaler.h"
#include "exynos_drm_fb.h"
#include "exynos_drm_drv.h"
#include "exynos_drm_iommu.h"
#include "exynos_drm_ipp.h"

#define scaler_read(offset)		readl(scaler->regs + (offset))
#define scaler_write(cfg, offset)	writel(cfg, scaler->regs + (offset))
#define SCALER_MAX_CLK			4
#define SCALER_AUTOSUSPEND_DELAY	2000
#define SCALER_RESET_WAIT_RETRIES	100

struct scaler_data {
	const char	*clk_name[SCALER_MAX_CLK];
	unsigned int	num_clk;
	const struct exynos_drm_ipp_formats *formats;
	unsigned int	num_formats;
};

struct scaler_context {
	struct exynos_drm_ipp		ipp;
	struct drm_device		*drm_dev;
	struct device			*dev;
	void __iomem			*regs;
	struct clk			*clock[SCALER_MAX_CLK];
	struct exynos_drm_ipp_task	*task;
	const struct scaler_data	*scaler_data;
};

static u32 scaler_get_format(u32 drm_fmt)
{
	switch (drm_fmt) {
	case DRM_FORMAT_NV12:
		return SCALER_YUV420_2P_UV;
	case DRM_FORMAT_NV21:
		return SCALER_YUV420_2P_VU;
	case DRM_FORMAT_YUV420:
		return SCALER_YUV420_3P;
	case DRM_FORMAT_YUYV:
		return SCALER_YUV422_1P_YUYV;
	case DRM_FORMAT_UYVY:
		return SCALER_YUV422_1P_UYVY;
	case DRM_FORMAT_YVYU:
		return SCALER_YUV422_1P_YVYU;
	case DRM_FORMAT_NV16:
		return SCALER_YUV422_2P_UV;
	case DRM_FORMAT_NV61:
		return SCALER_YUV422_2P_VU;
	case DRM_FORMAT_YUV422:
		return SCALER_YUV422_3P;
	case DRM_FORMAT_NV24:
		return SCALER_YUV444_2P_UV;
	case DRM_FORMAT_NV42:
		return SCALER_YUV444_2P_VU;
	case DRM_FORMAT_YUV444:
		return SCALER_YUV444_3P;
	case DRM_FORMAT_RGB565:
		return SCALER_RGB_565;
	case DRM_FORMAT_XRGB1555:
		return SCALER_ARGB1555;
	case DRM_FORMAT_ARGB1555:
		return SCALER_ARGB1555;
	case DRM_FORMAT_XRGB4444:
		return SCALER_ARGB4444;
	case DRM_FORMAT_ARGB4444:
		return SCALER_ARGB4444;
	case DRM_FORMAT_XRGB8888:
		return SCALER_ARGB8888;
	case DRM_FORMAT_ARGB8888:
		return SCALER_ARGB8888;
	case DRM_FORMAT_RGBX8888:
		return SCALER_RGBA8888;
	case DRM_FORMAT_RGBA8888:
		return SCALER_RGBA8888;
	default:
		break;
	}

	return 0;
}

static inline int scaler_reset(struct scaler_context *scaler)
{
	int retry = SCALER_RESET_WAIT_RETRIES;

	scaler_write(SCALER_CFG_SOFT_RESET, SCALER_CFG);
	do {
		cpu_relax();
	} while (retry > 1 &&
		 scaler_read(SCALER_CFG) & SCALER_CFG_SOFT_RESET);
	do {
		cpu_relax();
		scaler_write(1, SCALER_INT_EN);
	} while (retry > 0 && scaler_read(SCALER_INT_EN) != 1);

	return retry ? 0 : -EIO;
}

static inline void scaler_enable_int(struct scaler_context *scaler)
{
	u32 val;

	val = SCALER_INT_EN_TIMEOUT |
		SCALER_INT_EN_ILLEGAL_BLEND |
		SCALER_INT_EN_ILLEGAL_RATIO |
		SCALER_INT_EN_ILLEGAL_DST_HEIGHT |
		SCALER_INT_EN_ILLEGAL_DST_WIDTH |
		SCALER_INT_EN_ILLEGAL_DST_V_POS |
		SCALER_INT_EN_ILLEGAL_DST_H_POS |
		SCALER_INT_EN_ILLEGAL_DST_C_SPAN |
		SCALER_INT_EN_ILLEGAL_DST_Y_SPAN |
		SCALER_INT_EN_ILLEGAL_DST_CR_BASE |
		SCALER_INT_EN_ILLEGAL_DST_CB_BASE |
		SCALER_INT_EN_ILLEGAL_DST_Y_BASE |
		SCALER_INT_EN_ILLEGAL_DST_COLOR |
		SCALER_INT_EN_ILLEGAL_SRC_HEIGHT |
		SCALER_INT_EN_ILLEGAL_SRC_WIDTH |
		SCALER_INT_EN_ILLEGAL_SRC_CV_POS |
		SCALER_INT_EN_ILLEGAL_SRC_CH_POS |
		SCALER_INT_EN_ILLEGAL_SRC_YV_POS |
		SCALER_INT_EN_ILLEGAL_SRC_YH_POS |
		SCALER_INT_EN_ILLEGAL_DST_SPAN |
		SCALER_INT_EN_ILLEGAL_SRC_Y_SPAN |
		SCALER_INT_EN_ILLEGAL_SRC_CR_BASE |
		SCALER_INT_EN_ILLEGAL_SRC_CB_BASE |
		SCALER_INT_EN_ILLEGAL_SRC_Y_BASE |
		SCALER_INT_EN_ILLEGAL_SRC_COLOR |
		SCALER_INT_EN_FRAME_END;
	scaler_write(val, SCALER_INT_EN);
}

static inline void scaler_set_src_fmt(struct scaler_context *scaler,
	u32 src_fmt)
{
	u32 val;

	val = SCALER_SRC_CFG_SET_COLOR_FORMAT(src_fmt);
	scaler_write(val, SCALER_SRC_CFG);
}

static inline void scaler_set_src_base(struct scaler_context *scaler,
	struct exynos_drm_ipp_buffer *src_buf)
{
	static unsigned int bases[] = {
		SCALER_SRC_Y_BASE,
		SCALER_SRC_CB_BASE,
		SCALER_SRC_CR_BASE,
	};
	int i;

	for (i = 0; i < src_buf->format->num_planes; ++i)
		scaler_write(src_buf->dma_addr[i], bases[i]);
}

static inline void scaler_set_src_span(struct scaler_context *scaler,
	struct exynos_drm_ipp_buffer *src_buf)
{
	u32 val;

	val = SCALER_SRC_SPAN_SET_Y_SPAN(src_buf->buf.pitch[0] /
		src_buf->format->cpp[0]);

	if (src_buf->format->num_planes > 1)
		val |= SCALER_SRC_SPAN_SET_C_SPAN(src_buf->buf.pitch[1]);

	scaler_write(val, SCALER_SRC_SPAN);
}

static inline void scaler_set_src_luma_pos(struct scaler_context *scaler,
	struct drm_exynos_ipp_task_rect *src_pos)
{
	u32 val;

	val = SCALER_SRC_Y_POS_SET_YH_POS(src_pos->x << 2);
	val |=  SCALER_SRC_Y_POS_SET_YV_POS(src_pos->y << 2);
	scaler_write(val, SCALER_SRC_Y_POS);
	scaler_write(val, SCALER_SRC_C_POS); /* ATTENTION! */
}

static inline void scaler_set_src_wh(struct scaler_context *scaler,
	struct drm_exynos_ipp_task_rect *src_pos)
{
	u32 val;

	val = SCALER_SRC_WH_SET_WIDTH(src_pos->w);
	val |= SCALER_SRC_WH_SET_HEIGHT(src_pos->h);
	scaler_write(val, SCALER_SRC_WH);
}

static inline void scaler_set_dst_fmt(struct scaler_context *scaler,
	u32 dst_fmt)
{
	u32 val;

	val = SCALER_DST_CFG_SET_COLOR_FORMAT(dst_fmt);
	scaler_write(val, SCALER_DST_CFG);
}

static inline void scaler_set_dst_base(struct scaler_context *scaler,
	struct exynos_drm_ipp_buffer *dst_buf)
{
	static unsigned int bases[] = {
		SCALER_DST_Y_BASE,
		SCALER_DST_CB_BASE,
		SCALER_DST_CR_BASE,
	};
	int i;

	for (i = 0; i < dst_buf->format->num_planes; ++i)
		scaler_write(dst_buf->dma_addr[i], bases[i]);
}

static inline void scaler_set_dst_span(struct scaler_context *scaler,
	struct exynos_drm_ipp_buffer *dst_buf)
{
	u32 val;

	val = SCALER_DST_SPAN_SET_Y_SPAN(dst_buf->buf.pitch[0] /
		dst_buf->format->cpp[0]);

	if (dst_buf->format->num_planes > 1)
		val |= SCALER_DST_SPAN_SET_C_SPAN(dst_buf->buf.pitch[1]);

	scaler_write(val, SCALER_DST_SPAN);
}

static inline void scaler_set_dst_luma_pos(struct scaler_context *scaler,
	struct drm_exynos_ipp_task_rect *dst_pos)
{
	u32 val;

	val = SCALER_DST_WH_SET_WIDTH(dst_pos->w);
	val |= SCALER_DST_WH_SET_HEIGHT(dst_pos->h);
	scaler_write(val, SCALER_DST_WH);
}

static inline void scaler_set_dst_wh(struct scaler_context *scaler,
	struct drm_exynos_ipp_task_rect *dst_pos)
{
	u32 val;

	val = SCALER_DST_POS_SET_H_POS(dst_pos->x);
	val |= SCALER_DST_POS_SET_V_POS(dst_pos->y);
	scaler_write(val, SCALER_DST_POS);
}

static inline void scaler_set_hv_ratio(struct scaler_context *scaler,
	unsigned int rotation,
	struct drm_exynos_ipp_task_rect *src_pos,
	struct drm_exynos_ipp_task_rect *dst_pos)
{
	u32 val, h_ratio, v_ratio;

	if (drm_rotation_90_or_270(rotation)) {
		h_ratio = (src_pos->h << 16) / dst_pos->w;
		v_ratio = (src_pos->w << 16) / dst_pos->h;
	} else {
		h_ratio = (src_pos->w << 16) / dst_pos->w;
		v_ratio = (src_pos->h << 16) / dst_pos->h;
	}

	val = SCALER_H_RATIO_SET(h_ratio);
	scaler_write(val, SCALER_H_RATIO);

	val = SCALER_V_RATIO_SET(v_ratio);
	scaler_write(val, SCALER_V_RATIO);
}

static inline void scaler_set_rotation(struct scaler_context *scaler,
	unsigned int rotation)
{
	u32 val = 0;

	if (rotation & DRM_MODE_ROTATE_90)
		val |= SCALER_ROT_CFG_SET_ROTMODE(SCALER_ROT_MODE_90);
	else if (rotation & DRM_MODE_ROTATE_180)
		val |= SCALER_ROT_CFG_SET_ROTMODE(SCALER_ROT_MODE_180);
	else if (rotation & DRM_MODE_ROTATE_270)
		val |= SCALER_ROT_CFG_SET_ROTMODE(SCALER_ROT_MODE_270);
	if (rotation & DRM_MODE_REFLECT_X)
		val |= SCALER_ROT_CFG_FLIP_X_EN;
	if (rotation & DRM_MODE_REFLECT_Y)
		val |= SCALER_ROT_CFG_FLIP_Y_EN;
	scaler_write(val, SCALER_ROT_CFG);
}

static inline void scaler_set_csc(struct scaler_context *scaler,
	const struct drm_format_info *fmt)
{
	static const u32 csc_mtx[2][3][3] = {
		{ /* YCbCr to RGB */
			{0x254, 0x000, 0x331},
			{0x254, 0xf38, 0xe60},
			{0x254, 0x409, 0x000},
		},
		{ /* RGB to YCbCr */
			{0x084, 0x102, 0x032},
			{0xfb4, 0xf6b, 0x0e1},
			{0x0e1, 0xf44, 0xfdc},
		},
	};
	int i, j, dir;

	switch (fmt->format) {
	case DRM_FORMAT_RGB565:
	case DRM_FORMAT_XRGB1555:
	case DRM_FORMAT_ARGB1555:
	case DRM_FORMAT_XRGB4444:
	case DRM_FORMAT_ARGB4444:
	case DRM_FORMAT_XRGB8888:
	case DRM_FORMAT_ARGB8888:
	case DRM_FORMAT_RGBX8888:
	case DRM_FORMAT_RGBA8888:
		dir = 1;
		break;
	default:
		dir = 0;
	}

	for (i = 0; i < 3; i++)
		for (j = 0; j < 3; j++)
			scaler_write(csc_mtx[dir][i][j], SCALER_CSC_COEF(j, i));
}

static inline void scaler_set_timer(struct scaler_context *scaler,
	unsigned int timer, unsigned int divider)
{
	u32 val;

	val = SCALER_TIMEOUT_CTRL_TIMER_ENABLE;
	val |= SCALER_TIMEOUT_CTRL_SET_TIMER_VALUE(timer);
	val |= SCALER_TIMEOUT_CTRL_SET_TIMER_DIV(divider);
	scaler_write(val, SCALER_TIMEOUT_CTRL);
}

static inline void scaler_start_hw(struct scaler_context *scaler)
{
	scaler_write(SCALER_CFG_START_CMD, SCALER_CFG);
}

static int scaler_commit(struct exynos_drm_ipp *ipp,
			  struct exynos_drm_ipp_task *task)
{
	struct scaler_context *scaler =
			container_of(ipp, struct scaler_context, ipp);

	u32 src_fmt = scaler_get_format(task->src.buf.fourcc);
	struct drm_exynos_ipp_task_rect *src_pos = &task->src.rect;

	u32 dst_fmt = scaler_get_format(task->dst.buf.fourcc);
	struct drm_exynos_ipp_task_rect *dst_pos = &task->dst.rect;

	pm_runtime_get_sync(scaler->dev);
	if (scaler_reset(scaler)) {
		pm_runtime_put(scaler->dev);
		return -EIO;
	}

	scaler->task = task;

	scaler_set_src_fmt(scaler, src_fmt);
	scaler_set_src_base(scaler, &task->src);
	scaler_set_src_span(scaler, &task->src);
	scaler_set_src_luma_pos(scaler, src_pos);
	scaler_set_src_wh(scaler, src_pos);

	scaler_set_dst_fmt(scaler, dst_fmt);
	scaler_set_dst_base(scaler, &task->dst);
	scaler_set_dst_span(scaler, &task->dst);
	scaler_set_dst_luma_pos(scaler, dst_pos);
	scaler_set_dst_wh(scaler, dst_pos);

	scaler_set_hv_ratio(scaler, task->transform.rotation, src_pos, dst_pos);
	scaler_set_rotation(scaler, task->transform.rotation);

	scaler_set_csc(scaler, task->src.format);

	scaler_set_timer(scaler, 0xffff, 0xf);

	scaler_enable_int(scaler);
	scaler_start_hw(scaler);

	return 0;
}

static struct exynos_drm_ipp_funcs ipp_funcs = {
	.commit = scaler_commit,
};

static inline void scaler_disable_int(struct scaler_context *scaler)
{
	scaler_write(0, SCALER_INT_EN);
}

static inline u32 scaler_get_int_status(struct scaler_context *scaler)
{
	u32 val = scaler_read(SCALER_INT_STATUS);

	scaler_write(val, SCALER_INT_STATUS);

	return val;
}

static inline int scaler_task_done(u32 val)
{
	return val & SCALER_INT_STATUS_FRAME_END ? 0 : -EINVAL;
}

static irqreturn_t scaler_irq_handler(int irq, void *arg)
{
	struct scaler_context *scaler = arg;

	u32 val = scaler_get_int_status(scaler);

	scaler_disable_int(scaler);

	if (scaler->task) {
		struct exynos_drm_ipp_task *task = scaler->task;

		scaler->task = NULL;
		pm_runtime_mark_last_busy(scaler->dev);
		pm_runtime_put_autosuspend(scaler->dev);
		exynos_drm_ipp_task_done(task, scaler_task_done(val));
	}

	return IRQ_HANDLED;
}

static int scaler_bind(struct device *dev, struct device *master, void *data)
{
	struct scaler_context *scaler = dev_get_drvdata(dev);
	struct drm_device *drm_dev = data;
	struct exynos_drm_ipp *ipp = &scaler->ipp;

	scaler->drm_dev = drm_dev;
	drm_iommu_attach_device(drm_dev, dev);

	exynos_drm_ipp_register(drm_dev, ipp, &ipp_funcs,
			DRM_EXYNOS_IPP_CAP_CROP | DRM_EXYNOS_IPP_CAP_ROTATE |
			DRM_EXYNOS_IPP_CAP_SCALE | DRM_EXYNOS_IPP_CAP_CONVERT,
			scaler->scaler_data->formats,
			scaler->scaler_data->num_formats, "scaler");

	dev_info(dev, "The exynos scaler has been probed successfully\n");

	return 0;
}

static void scaler_unbind(struct device *dev, struct device *master,
			void *data)
{
	struct scaler_context *scaler = dev_get_drvdata(dev);
	struct drm_device *drm_dev = data;
	struct exynos_drm_ipp *ipp = &scaler->ipp;

	exynos_drm_ipp_unregister(drm_dev, ipp);
	drm_iommu_detach_device(scaler->drm_dev, scaler->dev);
}

static const struct component_ops scaler_component_ops = {
	.bind	= scaler_bind,
	.unbind = scaler_unbind,
};

static int scaler_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct resource	*regs_res;
	struct scaler_context *scaler;
	int irq;
	int ret, i;

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

	scaler->scaler_data =
		(struct scaler_data *)of_device_get_match_data(dev);

	scaler->dev = dev;
	regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	scaler->regs = devm_ioremap_resource(dev, regs_res);
	if (IS_ERR(scaler->regs))
		return PTR_ERR(scaler->regs);

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(dev, "failed to get irq\n");
		return irq;
	}

	ret = devm_request_threaded_irq(dev, irq, NULL,	scaler_irq_handler,
					IRQF_ONESHOT, "drm_scaler", scaler);
	if (ret < 0) {
		dev_err(dev, "failed to request irq\n");
		return ret;
	}

	for (i = 0; i < scaler->scaler_data->num_clk; ++i) {
		scaler->clock[i] = devm_clk_get(dev,
					      scaler->scaler_data->clk_name[i]);
		if (IS_ERR(scaler->clock[i])) {
			dev_err(dev, "failed to get clock\n");
			return PTR_ERR(scaler->clock[i]);
		}
	}

	pm_runtime_use_autosuspend(dev);
	pm_runtime_set_autosuspend_delay(dev, SCALER_AUTOSUSPEND_DELAY);
	pm_runtime_enable(dev);
	platform_set_drvdata(pdev, scaler);

	ret = component_add(dev, &scaler_component_ops);
	if (ret)
		goto err_ippdrv_register;

	return 0;

err_ippdrv_register:
	pm_runtime_dont_use_autosuspend(dev);
	pm_runtime_disable(dev);
	return ret;
}

static int scaler_remove(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;

	component_del(dev, &scaler_component_ops);
	pm_runtime_dont_use_autosuspend(dev);
	pm_runtime_disable(dev);

	return 0;
}

#ifdef CONFIG_PM

static int clk_disable_unprepare_wrapper(struct clk *clk)
{
	clk_disable_unprepare(clk);

	return 0;
}

static int scaler_clk_ctrl(struct scaler_context *scaler, bool enable)
{
	int (*clk_fun)(struct clk *clk), i;

	clk_fun = enable ? clk_prepare_enable : clk_disable_unprepare_wrapper;

	for (i = 0; i < scaler->scaler_data->num_clk; ++i)
		clk_fun(scaler->clock[i]);

	return 0;
}

static int scaler_runtime_suspend(struct device *dev)
{
	struct scaler_context *scaler = dev_get_drvdata(dev);

	return  scaler_clk_ctrl(scaler, false);
}

static int scaler_runtime_resume(struct device *dev)
{
	struct scaler_context *scaler = dev_get_drvdata(dev);

	return  scaler_clk_ctrl(scaler, true);
}
#endif

static const struct dev_pm_ops scaler_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
				pm_runtime_force_resume)
	SET_RUNTIME_PM_OPS(scaler_runtime_suspend, scaler_runtime_resume, NULL)
};

static const struct drm_exynos_ipp_limit scaler_5420_two_pixel_hv_limits[] = {
	{ IPP_SIZE_LIMIT(BUFFER, .h = { 16, SZ_8K }, .v = { 16, SZ_8K }) },
	{ IPP_SIZE_LIMIT(AREA, .h.align = 2, .v.align = 2) },
	{ IPP_SCALE_LIMIT(.h = { 65536 * 1 / 4, 65536 * 16 },
			  .v = { 65536 * 1 / 4, 65536 * 16 }) },
};

static const struct drm_exynos_ipp_limit scaler_5420_two_pixel_h_limits[] = {
	{ IPP_SIZE_LIMIT(BUFFER, .h = { 16, SZ_8K }, .v = { 16, SZ_8K }) },
	{ IPP_SIZE_LIMIT(AREA, .h.align = 2, .v.align = 1) },
	{ IPP_SCALE_LIMIT(.h = { 65536 * 1 / 4, 65536 * 16 },
			  .v = { 65536 * 1 / 4, 65536 * 16 }) },
};

static const struct drm_exynos_ipp_limit scaler_5420_one_pixel_limits[] = {
	{ IPP_SIZE_LIMIT(BUFFER, .h = { 16, SZ_8K }, .v = { 16, SZ_8K }) },
	{ IPP_SCALE_LIMIT(.h = { 65536 * 1 / 4, 65536 * 16 },
			  .v = { 65536 * 1 / 4, 65536 * 16 }) },
};

static const struct exynos_drm_ipp_formats exynos5420_formats[] = {
	/* SCALER_YUV420_2P_UV */
	{ IPP_SRCDST_FORMAT(NV21, scaler_5420_two_pixel_hv_limits) },

	/* SCALER_YUV420_2P_VU */
	{ IPP_SRCDST_FORMAT(NV12, scaler_5420_two_pixel_hv_limits) },

	/* SCALER_YUV420_3P */
	{ IPP_SRCDST_FORMAT(YUV420, scaler_5420_two_pixel_hv_limits) },

	/* SCALER_YUV422_1P_YUYV */
	{ IPP_SRCDST_FORMAT(YUYV, scaler_5420_two_pixel_h_limits) },

	/* SCALER_YUV422_1P_UYVY */
	{ IPP_SRCDST_FORMAT(UYVY, scaler_5420_two_pixel_h_limits) },

	/* SCALER_YUV422_1P_YVYU */
	{ IPP_SRCDST_FORMAT(YVYU, scaler_5420_two_pixel_h_limits) },

	/* SCALER_YUV422_2P_UV */
	{ IPP_SRCDST_FORMAT(NV61, scaler_5420_two_pixel_h_limits) },

	/* SCALER_YUV422_2P_VU */
	{ IPP_SRCDST_FORMAT(NV16, scaler_5420_two_pixel_h_limits) },

	/* SCALER_YUV422_3P */
	{ IPP_SRCDST_FORMAT(YUV422, scaler_5420_two_pixel_h_limits) },

	/* SCALER_YUV444_2P_UV */
	{ IPP_SRCDST_FORMAT(NV42, scaler_5420_one_pixel_limits) },

	/* SCALER_YUV444_2P_VU */
	{ IPP_SRCDST_FORMAT(NV24, scaler_5420_one_pixel_limits) },

	/* SCALER_YUV444_3P */
	{ IPP_SRCDST_FORMAT(YUV444, scaler_5420_one_pixel_limits) },

	/* SCALER_RGB_565 */
	{ IPP_SRCDST_FORMAT(RGB565, scaler_5420_one_pixel_limits) },

	/* SCALER_ARGB1555 */
	{ IPP_SRCDST_FORMAT(XRGB1555, scaler_5420_one_pixel_limits) },

	/* SCALER_ARGB1555 */
	{ IPP_SRCDST_FORMAT(ARGB1555, scaler_5420_one_pixel_limits) },

	/* SCALER_ARGB4444 */
	{ IPP_SRCDST_FORMAT(XRGB4444, scaler_5420_one_pixel_limits) },

	/* SCALER_ARGB4444 */
	{ IPP_SRCDST_FORMAT(ARGB4444, scaler_5420_one_pixel_limits) },

	/* SCALER_ARGB8888 */
	{ IPP_SRCDST_FORMAT(XRGB8888, scaler_5420_one_pixel_limits) },

	/* SCALER_ARGB8888 */
	{ IPP_SRCDST_FORMAT(ARGB8888, scaler_5420_one_pixel_limits) },

	/* SCALER_RGBA8888 */
	{ IPP_SRCDST_FORMAT(RGBX8888, scaler_5420_one_pixel_limits) },

	/* SCALER_RGBA8888 */
	{ IPP_SRCDST_FORMAT(RGBA8888, scaler_5420_one_pixel_limits) },
};

static const struct scaler_data exynos5420_data = {
	.clk_name	= {"mscl"},
	.num_clk	= 1,
	.formats	= exynos5420_formats,
	.num_formats	= ARRAY_SIZE(exynos5420_formats),
};

static const struct scaler_data exynos5433_data = {
	.clk_name	= {"pclk", "aclk", "aclk_xiu"},
	.num_clk	= 3,
	.formats	= exynos5420_formats, /* intentional */
	.num_formats	= ARRAY_SIZE(exynos5420_formats),
};

static const struct of_device_id exynos_scaler_match[] = {
	{
		.compatible = "samsung,exynos5420-scaler",
		.data = &exynos5420_data,
	}, {
		.compatible = "samsung,exynos5433-scaler",
		.data = &exynos5433_data,
	}, {
	},
};
MODULE_DEVICE_TABLE(of, exynos_scaler_match);

struct platform_driver scaler_driver = {
	.probe		= scaler_probe,
	.remove		= scaler_remove,
	.driver		= {
		.name	= "exynos-scaler",
		.owner	= THIS_MODULE,
		.pm	= &scaler_pm_ops,
		.of_match_table = exynos_scaler_match,
	},
};