drivers/gpu/drm/imx/dc/dc-fl.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2024 NXP
 */

#include <linux/component.h>
#include <linux/ioport.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>

#include <drm/drm_fourcc.h>

#include "dc-drv.h"
#include "dc-fu.h"

#define BASEADDRESS(x)			(0x10 + FRAC_OFFSET * (x))
#define SOURCEBUFFERATTRIBUTES(x)	(0x14 + FRAC_OFFSET * (x))
#define SOURCEBUFFERDIMENSION(x)	(0x18 + FRAC_OFFSET * (x))
#define COLORCOMPONENTBITS(x)		(0x1c + FRAC_OFFSET * (x))
#define COLORCOMPONENTSHIFT(x)		(0x20 + FRAC_OFFSET * (x))
#define LAYEROFFSET(x)			(0x24 + FRAC_OFFSET * (x))
#define CLIPWINDOWOFFSET(x)		(0x28 + FRAC_OFFSET * (x))
#define CLIPWINDOWDIMENSIONS(x)		(0x2c + FRAC_OFFSET * (x))
#define CONSTANTCOLOR(x)		(0x30 + FRAC_OFFSET * (x))
#define LAYERPROPERTY(x)		(0x34 + FRAC_OFFSET * (x))
#define FRAMEDIMENSIONS			0x150

struct dc_fl {
	struct dc_fu fu;
};

static const struct dc_subdev_info dc_fl_info[] = {
	{ .reg_start = 0x56180ac0, .id = 0, },
};

static const struct regmap_range dc_fl_regmap_ranges[] = {
	regmap_reg_range(STATICCONTROL, FRAMEDIMENSIONS),
};

static const struct regmap_access_table dc_fl_regmap_access_table = {
	.yes_ranges = dc_fl_regmap_ranges,
	.n_yes_ranges = ARRAY_SIZE(dc_fl_regmap_ranges),
};

static const struct regmap_config dc_fl_cfg_regmap_config = {
	.name = "cfg",
	.reg_bits = 32,
	.reg_stride = 4,
	.val_bits = 32,
	.fast_io = true,
	.wr_table = &dc_fl_regmap_access_table,
	.rd_table = &dc_fl_regmap_access_table,
	.max_register = FRAMEDIMENSIONS,
};

static void dc_fl_set_fmt(struct dc_fu *fu, enum dc_fu_frac frac,
			  const struct drm_format_info *format)
{
	u32 bits = 0, shifts = 0;

	dc_fu_set_src_bpp(fu, frac, format->cpp[0] * 8);

	regmap_write_bits(fu->reg_cfg, LAYERPROPERTY(frac),
			  YUVCONVERSIONMODE_MASK,
			  YUVCONVERSIONMODE(YUVCONVERSIONMODE_OFF));

	dc_fu_get_pixel_format_bits(fu, format->format, &bits);
	dc_fu_get_pixel_format_shifts(fu, format->format, &shifts);

	regmap_write(fu->reg_cfg, COLORCOMPONENTBITS(frac), bits);
	regmap_write(fu->reg_cfg, COLORCOMPONENTSHIFT(frac), shifts);
}

static void dc_fl_set_framedimensions(struct dc_fu *fu, int w, int h)
{
	regmap_write(fu->reg_cfg, FRAMEDIMENSIONS,
		     FRAMEWIDTH(w) | FRAMEHEIGHT(h));
}

static void dc_fl_init(struct dc_fu *fu)
{
	dc_fu_common_hw_init(fu);
	dc_fu_shdldreq_sticky(fu, 0xff);
}

static void dc_fl_set_ops(struct dc_fu *fu)
{
	memcpy(&fu->ops, &dc_fu_common_ops, sizeof(dc_fu_common_ops));
	fu->ops.init = dc_fl_init;
	fu->ops.set_fmt = dc_fl_set_fmt;
	fu->ops.set_framedimensions = dc_fl_set_framedimensions;
}

static int dc_fl_bind(struct device *dev, struct device *master, void *data)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct dc_drm_device *dc_drm = data;
	struct resource *res_pec;
	void __iomem *base_cfg;
	struct dc_fl *fl;
	struct dc_fu *fu;
	int i, id;

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

	fu = &fl->fu;

	res_pec = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	base_cfg = devm_platform_ioremap_resource_byname(pdev, "cfg");
	if (IS_ERR(base_cfg))
		return PTR_ERR(base_cfg);

	fu->reg_cfg = devm_regmap_init_mmio(dev, base_cfg,
					    &dc_fl_cfg_regmap_config);
	if (IS_ERR(fu->reg_cfg))
		return PTR_ERR(fu->reg_cfg);

	id = dc_subdev_get_id(dc_fl_info, ARRAY_SIZE(dc_fl_info), res_pec);
	if (id < 0) {
		dev_err(dev, "failed to get instance number: %d\n", id);
		return id;
	}

	fu->link_id = LINK_ID_FETCHLAYER0;
	fu->id = DC_FETCHUNIT_FL0;
	for (i = 0; i < DC_FETCHUNIT_FRAC_NUM; i++) {
		fu->reg_baseaddr[i]		  = BASEADDRESS(i);
		fu->reg_sourcebufferattributes[i] = SOURCEBUFFERATTRIBUTES(i);
		fu->reg_sourcebufferdimension[i]  = SOURCEBUFFERDIMENSION(i);
		fu->reg_layeroffset[i]		  = LAYEROFFSET(i);
		fu->reg_clipwindowoffset[i]	  = CLIPWINDOWOFFSET(i);
		fu->reg_clipwindowdimensions[i]	  = CLIPWINDOWDIMENSIONS(i);
		fu->reg_constantcolor[i]	  = CONSTANTCOLOR(i);
		fu->reg_layerproperty[i]	  = LAYERPROPERTY(i);
	}
	snprintf(fu->name, sizeof(fu->name), "FetchLayer%d", id);

	dc_fl_set_ops(fu);

	dc_drm->fu_disp[fu->id] = fu;

	return 0;
}

static const struct component_ops dc_fl_ops = {
	.bind = dc_fl_bind,
};

static int dc_fl_probe(struct platform_device *pdev)
{
	int ret;

	ret = component_add(&pdev->dev, &dc_fl_ops);
	if (ret)
		return dev_err_probe(&pdev->dev, ret,
				     "failed to add component\n");

	return 0;
}

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

static const struct of_device_id dc_fl_dt_ids[] = {
	{ .compatible = "fsl,imx8qxp-dc-fetchlayer" },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, dc_fl_dt_ids);

struct platform_driver dc_fl_driver = {
	.probe = dc_fl_probe,
	.remove = dc_fl_remove,
	.driver = {
		.name = "imx8-dc-fetchlayer",
		.suppress_bind_attrs = true,
		.of_match_table = dc_fl_dt_ids,
	},
};