[deliverable/linux.git] / drivers / gpu / drm / sun4i / sun4i_tv.c

/*
 * Copyright (C) 2015 Free Electrons
 * Copyright (C) 2015 NextThing Co
 *
 * Maxime Ripard <maxime.ripard@free-electrons.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 */

#include <linux/clk.h>
#include <linux/component.h>
#include <linux/of_address.h>
#include <linux/regmap.h>
#include <linux/reset.h>

#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_panel.h>

#include "sun4i_backend.h"
#include "sun4i_drv.h"
#include "sun4i_tcon.h"

#define SUN4I_TVE_EN_REG		0x000
#define SUN4I_TVE_EN_DAC_MAP_MASK		GENMASK(19, 4)
#define SUN4I_TVE_EN_DAC_MAP(dac, out)		(((out) & 0xf) << (dac + 1) * 4)
#define SUN4I_TVE_EN_ENABLE			BIT(0)

#define SUN4I_TVE_CFG0_REG		0x004
#define SUN4I_TVE_CFG0_DAC_CONTROL_54M		BIT(26)
#define SUN4I_TVE_CFG0_CORE_DATAPATH_54M	BIT(25)
#define SUN4I_TVE_CFG0_CORE_CONTROL_54M		BIT(24)
#define SUN4I_TVE_CFG0_YC_EN			BIT(17)
#define SUN4I_TVE_CFG0_COMP_EN			BIT(16)
#define SUN4I_TVE_CFG0_RES(x)			((x) & 0xf)
#define SUN4I_TVE_CFG0_RES_480i			SUN4I_TVE_CFG0_RES(0)
#define SUN4I_TVE_CFG0_RES_576i			SUN4I_TVE_CFG0_RES(1)

#define SUN4I_TVE_DAC0_REG		0x008
#define SUN4I_TVE_DAC0_CLOCK_INVERT		BIT(24)
#define SUN4I_TVE_DAC0_LUMA(x)			(((x) & 3) << 20)
#define SUN4I_TVE_DAC0_LUMA_0_4			SUN4I_TVE_DAC0_LUMA(3)
#define SUN4I_TVE_DAC0_CHROMA(x)		(((x) & 3) << 18)
#define SUN4I_TVE_DAC0_CHROMA_0_75		SUN4I_TVE_DAC0_CHROMA(3)
#define SUN4I_TVE_DAC0_INTERNAL_DAC(x)		(((x) & 3) << 16)
#define SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS	SUN4I_TVE_DAC0_INTERNAL_DAC(3)
#define SUN4I_TVE_DAC0_DAC_EN(dac)		BIT(dac)

#define SUN4I_TVE_NOTCH_REG		0x00c
#define SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(dac, x)	((4 - (x)) << (dac * 3))

#define SUN4I_TVE_CHROMA_FREQ_REG	0x010

#define SUN4I_TVE_PORCH_REG		0x014
#define SUN4I_TVE_PORCH_BACK(x)			((x) << 16)
#define SUN4I_TVE_PORCH_FRONT(x)		(x)

#define SUN4I_TVE_LINE_REG		0x01c
#define SUN4I_TVE_LINE_FIRST(x)			((x) << 16)
#define SUN4I_TVE_LINE_NUMBER(x)		(x)

#define SUN4I_TVE_LEVEL_REG		0x020
#define SUN4I_TVE_LEVEL_BLANK(x)		((x) << 16)
#define SUN4I_TVE_LEVEL_BLACK(x)		(x)

#define SUN4I_TVE_DAC1_REG		0x024
#define SUN4I_TVE_DAC1_AMPLITUDE(dac, x)	((x) << (dac * 8))

#define SUN4I_TVE_DETECT_STA_REG	0x038
#define SUN4I_TVE_DETECT_STA_DAC(dac)		BIT((dac * 8))
#define SUN4I_TVE_DETECT_STA_UNCONNECTED		0
#define SUN4I_TVE_DETECT_STA_CONNECTED			1
#define SUN4I_TVE_DETECT_STA_GROUND			2

#define SUN4I_TVE_CB_CR_LVL_REG		0x10c
#define SUN4I_TVE_CB_CR_LVL_CR_BURST(x)		((x) << 8)
#define SUN4I_TVE_CB_CR_LVL_CB_BURST(x)		(x)

#define SUN4I_TVE_TINT_BURST_PHASE_REG	0x110
#define SUN4I_TVE_TINT_BURST_PHASE_CHROMA(x)	(x)

#define SUN4I_TVE_BURST_WIDTH_REG	0x114
#define SUN4I_TVE_BURST_WIDTH_BREEZEWAY(x)	((x) << 16)
#define SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(x)	((x) << 8)
#define SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(x)	(x)

#define SUN4I_TVE_CB_CR_GAIN_REG	0x118
#define SUN4I_TVE_CB_CR_GAIN_CR(x)		((x) << 8)
#define SUN4I_TVE_CB_CR_GAIN_CB(x)		(x)

#define SUN4I_TVE_SYNC_VBI_REG		0x11c
#define SUN4I_TVE_SYNC_VBI_SYNC(x)		((x) << 16)
#define SUN4I_TVE_SYNC_VBI_VBLANK(x)		(x)

#define SUN4I_TVE_ACTIVE_LINE_REG	0x124
#define SUN4I_TVE_ACTIVE_LINE(x)		(x)

#define SUN4I_TVE_CHROMA_REG		0x128
#define SUN4I_TVE_CHROMA_COMP_GAIN(x)		((x) & 3)
#define SUN4I_TVE_CHROMA_COMP_GAIN_50		SUN4I_TVE_CHROMA_COMP_GAIN(2)

#define SUN4I_TVE_12C_REG		0x12c
#define SUN4I_TVE_12C_NOTCH_WIDTH_WIDE		BIT(8)
#define SUN4I_TVE_12C_COMP_YUV_EN		BIT(0)

#define SUN4I_TVE_RESYNC_REG		0x130
#define SUN4I_TVE_RESYNC_FIELD			BIT(31)
#define SUN4I_TVE_RESYNC_LINE(x)		((x) << 16)
#define SUN4I_TVE_RESYNC_PIXEL(x)		(x)

#define SUN4I_TVE_SLAVE_REG		0x134

#define SUN4I_TVE_WSS_DATA2_REG		0x244

struct color_gains {
	u16	cb;
	u16	cr;
};

struct burst_levels {
	u16	cb;
	u16	cr;
};

struct video_levels {
	u16	black;
	u16	blank;
};

struct resync_parameters {
	bool	field;
	u16	line;
	u16	pixel;
};

struct tv_mode {
	char		*name;

	u32		mode;
	u32		chroma_freq;
	u16		back_porch;
	u16		front_porch;
	u16		line_number;
	u16		vblank_level;

	u32		hdisplay;
	u16		hfront_porch;
	u16		hsync_len;
	u16		hback_porch;

	u32		vdisplay;
	u16		vfront_porch;
	u16		vsync_len;
	u16		vback_porch;

	bool		yc_en;
	bool		dac3_en;
	bool		dac_bit25_en;

	struct color_gains		*color_gains;
	struct burst_levels		*burst_levels;
	struct video_levels		*video_levels;
	struct resync_parameters	*resync_params;
};

struct sun4i_tv {
	struct drm_connector	connector;
	struct drm_encoder	encoder;

	struct clk		*clk;
	struct regmap		*regs;
	struct reset_control	*reset;

	struct sun4i_drv	*drv;
};

struct video_levels ntsc_video_levels = {
	.black = 282,	.blank = 240,
};

struct video_levels pal_video_levels = {
	.black = 252,	.blank = 252,
};

struct burst_levels ntsc_burst_levels = {
	.cb = 79,	.cr = 0,
};

struct burst_levels pal_burst_levels = {
	.cb = 40,	.cr = 40,
};

struct color_gains ntsc_color_gains = {
	.cb = 160,	.cr = 160,
};

struct color_gains pal_color_gains = {
	.cb = 224,	.cr = 224,
};

struct resync_parameters ntsc_resync_parameters = {
	.field = false,	.line = 14,	.pixel = 12,
};

struct resync_parameters pal_resync_parameters = {
	.field = true,	.line = 13,	.pixel = 12,
};

struct tv_mode tv_modes[] = {
	{
		.name		= "NTSC",
		.mode		= SUN4I_TVE_CFG0_RES_480i,
		.chroma_freq	= 0x21f07c1f,
		.yc_en		= true,
		.dac3_en	= true,
		.dac_bit25_en	= true,

		.back_porch	= 118,
		.front_porch	= 32,
		.line_number	= 525,

		.hdisplay	= 720,
		.hfront_porch	= 18,
		.hsync_len	= 2,
		.hback_porch	= 118,

		.vdisplay	= 480,
		.vfront_porch	= 26,
		.vsync_len	= 2,
		.vback_porch	= 17,

		.vblank_level	= 240,

		.color_gains	= &ntsc_color_gains,
		.burst_levels	= &ntsc_burst_levels,
		.video_levels	= &ntsc_video_levels,
		.resync_params	= &ntsc_resync_parameters,
	},
	{
		.name		= "PAL",
		.mode		= SUN4I_TVE_CFG0_RES_576i,
		.chroma_freq	= 0x2a098acb,

		.back_porch	= 138,
		.front_porch	= 24,
		.line_number	= 625,

		.hdisplay	= 720,
		.hfront_porch	= 3,
		.hsync_len	= 2,
		.hback_porch	= 139,

		.vdisplay	= 576,
		.vfront_porch	= 28,
		.vsync_len	= 2,
		.vback_porch	= 19,

		.vblank_level	= 252,

		.color_gains	= &pal_color_gains,
		.burst_levels	= &pal_burst_levels,
		.video_levels	= &pal_video_levels,
		.resync_params	= &pal_resync_parameters,
	},
};

static inline struct sun4i_tv *
drm_encoder_to_sun4i_tv(struct drm_encoder *encoder)
{
	return container_of(encoder, struct sun4i_tv,
			    encoder);
}

static inline struct sun4i_tv *
drm_connector_to_sun4i_tv(struct drm_connector *connector)
{
	return container_of(connector, struct sun4i_tv,
			    connector);
}

/*
 * FIXME: If only the drm_display_mode private field was usable, this
 * could go away...
 *
 * So far, it doesn't seem to be preserved when the mode is passed by
 * to mode_set for some reason.
 */
static struct tv_mode *sun4i_tv_find_tv_by_mode(struct drm_display_mode *mode)
{
	int i;

	/* First try to identify the mode by name */
	for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
		struct tv_mode *tv_mode = &tv_modes[i];

		DRM_DEBUG_DRIVER("Comparing mode %s vs %s",
				 mode->name, tv_mode->name);

		if (!strcmp(mode->name, tv_mode->name))
			return tv_mode;
	}

	/* Then by number of lines */
	for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
		struct tv_mode *tv_mode = &tv_modes[i];

		DRM_DEBUG_DRIVER("Comparing mode %s vs %s (X: %d vs %d)",
				 mode->name, tv_mode->name,
				 mode->vdisplay, tv_mode->vdisplay);

		if (mode->vdisplay == tv_mode->vdisplay)
			return tv_mode;
	}

	return NULL;
}

static void sun4i_tv_mode_to_drm_mode(struct tv_mode *tv_mode,
				      struct drm_display_mode *mode)
{
	DRM_DEBUG_DRIVER("Creating mode %s\n", mode->name);

	mode->type = DRM_MODE_TYPE_DRIVER;
	mode->clock = 13500;
	mode->flags = DRM_MODE_FLAG_INTERLACE;

	mode->hdisplay = tv_mode->hdisplay;
	mode->hsync_start = mode->hdisplay + tv_mode->hfront_porch;
	mode->hsync_end = mode->hsync_start + tv_mode->hsync_len;
	mode->htotal = mode->hsync_end  + tv_mode->hback_porch;

	mode->vdisplay = tv_mode->vdisplay;
	mode->vsync_start = mode->vdisplay + tv_mode->vfront_porch;
	mode->vsync_end = mode->vsync_start + tv_mode->vsync_len;
	mode->vtotal = mode->vsync_end  + tv_mode->vback_porch;
}

static int sun4i_tv_atomic_check(struct drm_encoder *encoder,
				 struct drm_crtc_state *crtc_state,
				 struct drm_connector_state *conn_state)
{
	return 0;
}

static void sun4i_tv_disable(struct drm_encoder *encoder)
{
	struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
	struct sun4i_drv *drv = tv->drv;
	struct sun4i_tcon *tcon = drv->tcon;

	DRM_DEBUG_DRIVER("Disabling the TV Output\n");

	sun4i_tcon_channel_disable(tcon, 1);

	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
			   SUN4I_TVE_EN_ENABLE,
			   0);
	sun4i_backend_disable_color_correction(drv->backend);
}

static void sun4i_tv_enable(struct drm_encoder *encoder)
{
	struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
	struct sun4i_drv *drv = tv->drv;
	struct sun4i_tcon *tcon = drv->tcon;

	DRM_DEBUG_DRIVER("Enabling the TV Output\n");

	sun4i_backend_apply_color_correction(drv->backend);

	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
			   SUN4I_TVE_EN_ENABLE,
			   SUN4I_TVE_EN_ENABLE);

	sun4i_tcon_channel_enable(tcon, 1);
}

static void sun4i_tv_mode_set(struct drm_encoder *encoder,
			      struct drm_display_mode *mode,
			      struct drm_display_mode *adjusted_mode)
{
	struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
	struct sun4i_drv *drv = tv->drv;
	struct sun4i_tcon *tcon = drv->tcon;
	struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode);

	sun4i_tcon1_mode_set(tcon, mode);

	/* Enable and map the DAC to the output */
	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
			   SUN4I_TVE_EN_DAC_MAP_MASK,
			   SUN4I_TVE_EN_DAC_MAP(0, 1) |
			   SUN4I_TVE_EN_DAC_MAP(1, 2) |
			   SUN4I_TVE_EN_DAC_MAP(2, 3) |
			   SUN4I_TVE_EN_DAC_MAP(3, 4));

	/* Set PAL settings */
	regmap_write(tv->regs, SUN4I_TVE_CFG0_REG,
		     tv_mode->mode |
		     (tv_mode->yc_en ? SUN4I_TVE_CFG0_YC_EN : 0) |
		     SUN4I_TVE_CFG0_COMP_EN |
		     SUN4I_TVE_CFG0_DAC_CONTROL_54M |
		     SUN4I_TVE_CFG0_CORE_DATAPATH_54M |
		     SUN4I_TVE_CFG0_CORE_CONTROL_54M);

	/* Configure the DAC for a composite output */
	regmap_write(tv->regs, SUN4I_TVE_DAC0_REG,
		     SUN4I_TVE_DAC0_DAC_EN(0) |
		     (tv_mode->dac3_en ? SUN4I_TVE_DAC0_DAC_EN(3) : 0) |
		     SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS |
		     SUN4I_TVE_DAC0_CHROMA_0_75 |
		     SUN4I_TVE_DAC0_LUMA_0_4 |
		     SUN4I_TVE_DAC0_CLOCK_INVERT |
		     (tv_mode->dac_bit25_en ? BIT(25) : 0) |
		     BIT(30));

	/* Configure the sample delay between DAC0 and the other DAC */
	regmap_write(tv->regs, SUN4I_TVE_NOTCH_REG,
		     SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(1, 0) |
		     SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(2, 0));

	regmap_write(tv->regs, SUN4I_TVE_CHROMA_FREQ_REG,
		     tv_mode->chroma_freq);

	/* Set the front and back porch */
	regmap_write(tv->regs, SUN4I_TVE_PORCH_REG,
		     SUN4I_TVE_PORCH_BACK(tv_mode->back_porch) |
		     SUN4I_TVE_PORCH_FRONT(tv_mode->front_porch));

	/* Set the lines setup */
	regmap_write(tv->regs, SUN4I_TVE_LINE_REG,
		     SUN4I_TVE_LINE_FIRST(22) |
		     SUN4I_TVE_LINE_NUMBER(tv_mode->line_number));

	regmap_write(tv->regs, SUN4I_TVE_LEVEL_REG,
		     SUN4I_TVE_LEVEL_BLANK(tv_mode->video_levels->blank) |
		     SUN4I_TVE_LEVEL_BLACK(tv_mode->video_levels->black));

	regmap_write(tv->regs, SUN4I_TVE_DAC1_REG,
		     SUN4I_TVE_DAC1_AMPLITUDE(0, 0x18) |
		     SUN4I_TVE_DAC1_AMPLITUDE(1, 0x18) |
		     SUN4I_TVE_DAC1_AMPLITUDE(2, 0x18) |
		     SUN4I_TVE_DAC1_AMPLITUDE(3, 0x18));

	regmap_write(tv->regs, SUN4I_TVE_CB_CR_LVL_REG,
		     SUN4I_TVE_CB_CR_LVL_CB_BURST(tv_mode->burst_levels->cb) |
		     SUN4I_TVE_CB_CR_LVL_CR_BURST(tv_mode->burst_levels->cr));

	/* Set burst width for a composite output */
	regmap_write(tv->regs, SUN4I_TVE_BURST_WIDTH_REG,
		     SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(126) |
		     SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(68) |
		     SUN4I_TVE_BURST_WIDTH_BREEZEWAY(22));

	regmap_write(tv->regs, SUN4I_TVE_CB_CR_GAIN_REG,
		     SUN4I_TVE_CB_CR_GAIN_CB(tv_mode->color_gains->cb) |
		     SUN4I_TVE_CB_CR_GAIN_CR(tv_mode->color_gains->cr));

	regmap_write(tv->regs, SUN4I_TVE_SYNC_VBI_REG,
		     SUN4I_TVE_SYNC_VBI_SYNC(0x10) |
		     SUN4I_TVE_SYNC_VBI_VBLANK(tv_mode->vblank_level));

	regmap_write(tv->regs, SUN4I_TVE_ACTIVE_LINE_REG,
		     SUN4I_TVE_ACTIVE_LINE(1440));

	/* Set composite chroma gain to 50 % */
	regmap_write(tv->regs, SUN4I_TVE_CHROMA_REG,
		     SUN4I_TVE_CHROMA_COMP_GAIN_50);

	regmap_write(tv->regs, SUN4I_TVE_12C_REG,
		     SUN4I_TVE_12C_COMP_YUV_EN |
		     SUN4I_TVE_12C_NOTCH_WIDTH_WIDE);

	regmap_write(tv->regs, SUN4I_TVE_RESYNC_REG,
		     SUN4I_TVE_RESYNC_PIXEL(tv_mode->resync_params->pixel) |
		     SUN4I_TVE_RESYNC_LINE(tv_mode->resync_params->line) |
		     (tv_mode->resync_params->field ?
		      SUN4I_TVE_RESYNC_FIELD : 0));

	regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0);

	clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000);
}

static struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = {
	.atomic_check	= sun4i_tv_atomic_check,
	.disable	= sun4i_tv_disable,
	.enable		= sun4i_tv_enable,
	.mode_set	= sun4i_tv_mode_set,
};

static void sun4i_tv_destroy(struct drm_encoder *encoder)
{
	drm_encoder_cleanup(encoder);
}

static struct drm_encoder_funcs sun4i_tv_funcs = {
	.destroy	= sun4i_tv_destroy,
};

static int sun4i_tv_comp_get_modes(struct drm_connector *connector)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
		struct drm_display_mode *mode = drm_mode_create(connector->dev);
		struct tv_mode *tv_mode = &tv_modes[i];

		strcpy(mode->name, tv_mode->name);

		sun4i_tv_mode_to_drm_mode(tv_mode, mode);
		drm_mode_probed_add(connector, mode);
	}

	return i;
}

static int sun4i_tv_comp_mode_valid(struct drm_connector *connector,
				    struct drm_display_mode *mode)
{
	/* TODO */
	return MODE_OK;
}

static struct drm_encoder *
sun4i_tv_comp_best_encoder(struct drm_connector *connector)
{
	struct sun4i_tv *tv = drm_connector_to_sun4i_tv(connector);

	return &tv->encoder;
}

static struct drm_connector_helper_funcs sun4i_tv_comp_connector_helper_funcs = {
	.get_modes	= sun4i_tv_comp_get_modes,
	.mode_valid	= sun4i_tv_comp_mode_valid,
	.best_encoder	= sun4i_tv_comp_best_encoder,
};

static enum drm_connector_status
sun4i_tv_comp_connector_detect(struct drm_connector *connector, bool force)
{
	return connector_status_connected;
}

static void
sun4i_tv_comp_connector_destroy(struct drm_connector *connector)
{
	drm_connector_cleanup(connector);
}

static struct drm_connector_funcs sun4i_tv_comp_connector_funcs = {
	.dpms			= drm_atomic_helper_connector_dpms,
	.detect			= sun4i_tv_comp_connector_detect,
	.fill_modes		= drm_helper_probe_single_connector_modes,
	.destroy		= sun4i_tv_comp_connector_destroy,
	.reset			= drm_atomic_helper_connector_reset,
	.atomic_duplicate_state	= drm_atomic_helper_connector_duplicate_state,
	.atomic_destroy_state	= drm_atomic_helper_connector_destroy_state,
};

static struct regmap_config sun4i_tv_regmap_config = {
	.reg_bits	= 32,
	.val_bits	= 32,
	.reg_stride	= 4,
	.max_register	= SUN4I_TVE_WSS_DATA2_REG,
	.name		= "tv-encoder",
};

static int sun4i_tv_bind(struct device *dev, struct device *master,
			 void *data)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct drm_device *drm = data;
	struct sun4i_drv *drv = drm->dev_private;
	struct sun4i_tv *tv;
	struct resource *res;
	void __iomem *regs;
	int ret;

	tv = devm_kzalloc(dev, sizeof(*tv), GFP_KERNEL);
	if (!tv)
		return -ENOMEM;
	tv->drv = drv;
	dev_set_drvdata(dev, tv);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	regs = devm_ioremap_resource(dev, res);
	if (IS_ERR(regs)) {
		dev_err(dev, "Couldn't map the TV encoder registers\n");
		return PTR_ERR(regs);
	}

	tv->regs = devm_regmap_init_mmio(dev, regs,
					 &sun4i_tv_regmap_config);
	if (IS_ERR(tv->regs)) {
		dev_err(dev, "Couldn't create the TV encoder regmap\n");
		return PTR_ERR(tv->regs);
	}

	tv->reset = devm_reset_control_get(dev, NULL);
	if (IS_ERR(tv->reset)) {
		dev_err(dev, "Couldn't get our reset line\n");
		return PTR_ERR(tv->reset);
	}

	ret = reset_control_deassert(tv->reset);
	if (ret) {
		dev_err(dev, "Couldn't deassert our reset line\n");
		return ret;
	}

	tv->clk = devm_clk_get(dev, NULL);
	if (IS_ERR(tv->clk)) {
		dev_err(dev, "Couldn't get the TV encoder clock\n");
		ret = PTR_ERR(tv->clk);
		goto err_assert_reset;
	}
	clk_prepare_enable(tv->clk);

	drm_encoder_helper_add(&tv->encoder,
			       &sun4i_tv_helper_funcs);
	ret = drm_encoder_init(drm,
			       &tv->encoder,
			       &sun4i_tv_funcs,
			       DRM_MODE_ENCODER_TVDAC,
			       NULL);
	if (ret) {
		dev_err(dev, "Couldn't initialise the TV encoder\n");
		goto err_disable_clk;
	}

	tv->encoder.possible_crtcs = BIT(0);

	drm_connector_helper_add(&tv->connector,
				 &sun4i_tv_comp_connector_helper_funcs);
	ret = drm_connector_init(drm, &tv->connector,
				 &sun4i_tv_comp_connector_funcs,
				 DRM_MODE_CONNECTOR_Composite);
	if (ret) {
		dev_err(dev,
			"Couldn't initialise the Composite connector\n");
		goto err_cleanup_connector;
	}
	tv->connector.interlace_allowed = true;

	drm_mode_connector_attach_encoder(&tv->connector, &tv->encoder);

	return 0;

err_cleanup_connector:
	drm_encoder_cleanup(&tv->encoder);
err_disable_clk:
	clk_disable_unprepare(tv->clk);
err_assert_reset:
	reset_control_assert(tv->reset);
	return ret;
}

static void sun4i_tv_unbind(struct device *dev, struct device *master,
			    void *data)
{
	struct sun4i_tv *tv = dev_get_drvdata(dev);

	drm_connector_cleanup(&tv->connector);
	drm_encoder_cleanup(&tv->encoder);
	clk_disable_unprepare(tv->clk);
}

static struct component_ops sun4i_tv_ops = {
	.bind	= sun4i_tv_bind,
	.unbind	= sun4i_tv_unbind,
};

static int sun4i_tv_probe(struct platform_device *pdev)
{
	return component_add(&pdev->dev, &sun4i_tv_ops);
}

static int sun4i_tv_remove(struct platform_device *pdev)
{
	component_del(&pdev->dev, &sun4i_tv_ops);

	return 0;
}

static const struct of_device_id sun4i_tv_of_table[] = {
	{ .compatible = "allwinner,sun4i-a10-tv-encoder" },
	{ }
};
MODULE_DEVICE_TABLE(of, sun4i_tv_of_table);

static struct platform_driver sun4i_tv_platform_driver = {
	.probe		= sun4i_tv_probe,
	.remove		= sun4i_tv_remove,
	.driver		= {
		.name		= "sun4i-tve",
		.of_match_table	= sun4i_tv_of_table,
	},
};
module_platform_driver(sun4i_tv_platform_driver);

MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
MODULE_DESCRIPTION("Allwinner A10 TV Encoder Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
03c4c71d MR	1	/*
	2	* Copyright (C) 2015 Free Electrons
	3	* Copyright (C) 2015 NextThing Co
	4	*
	5	* Maxime Ripard <maxime.ripard@free-electrons.com>
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License as
	9	* published by the Free Software Foundation; either version 2 of
	10	* the License, or (at your option) any later version.
	11	*/
	12
	13	#include <linux/clk.h>
	14	#include <linux/component.h>
	15	#include <linux/of_address.h>
	16	#include <linux/regmap.h>
	17	#include <linux/reset.h>
	18
	19	#include <drm/drmP.h>
	20	#include <drm/drm_atomic_helper.h>
	21	#include <drm/drm_crtc_helper.h>
	22	#include <drm/drm_panel.h>
	23
	24	#include "sun4i_backend.h"
	25	#include "sun4i_drv.h"
	26	#include "sun4i_tcon.h"
	27
	28	#define SUN4I_TVE_EN_REG 0x000
	29	#define SUN4I_TVE_EN_DAC_MAP_MASK GENMASK(19, 4)
	30	#define SUN4I_TVE_EN_DAC_MAP(dac, out) (((out) & 0xf) << (dac + 1) * 4)
	31	#define SUN4I_TVE_EN_ENABLE BIT(0)
	32
	33	#define SUN4I_TVE_CFG0_REG 0x004
	34	#define SUN4I_TVE_CFG0_DAC_CONTROL_54M BIT(26)
	35	#define SUN4I_TVE_CFG0_CORE_DATAPATH_54M BIT(25)
	36	#define SUN4I_TVE_CFG0_CORE_CONTROL_54M BIT(24)
	37	#define SUN4I_TVE_CFG0_YC_EN BIT(17)
	38	#define SUN4I_TVE_CFG0_COMP_EN BIT(16)
	39	#define SUN4I_TVE_CFG0_RES(x) ((x) & 0xf)
	40	#define SUN4I_TVE_CFG0_RES_480i SUN4I_TVE_CFG0_RES(0)
	41	#define SUN4I_TVE_CFG0_RES_576i SUN4I_TVE_CFG0_RES(1)
	42
	43	#define SUN4I_TVE_DAC0_REG 0x008
	44	#define SUN4I_TVE_DAC0_CLOCK_INVERT BIT(24)
	45	#define SUN4I_TVE_DAC0_LUMA(x) (((x) & 3) << 20)
	46	#define SUN4I_TVE_DAC0_LUMA_0_4 SUN4I_TVE_DAC0_LUMA(3)
	47	#define SUN4I_TVE_DAC0_CHROMA(x) (((x) & 3) << 18)
	48	#define SUN4I_TVE_DAC0_CHROMA_0_75 SUN4I_TVE_DAC0_CHROMA(3)
	49	#define SUN4I_TVE_DAC0_INTERNAL_DAC(x) (((x) & 3) << 16)
	50	#define SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS SUN4I_TVE_DAC0_INTERNAL_DAC(3)
	51	#define SUN4I_TVE_DAC0_DAC_EN(dac) BIT(dac)
	52
	53	#define SUN4I_TVE_NOTCH_REG 0x00c
	54	#define SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(dac, x) ((4 - (x)) << (dac * 3))
	55
	56	#define SUN4I_TVE_CHROMA_FREQ_REG 0x010
	57
	58	#define SUN4I_TVE_PORCH_REG 0x014
	59	#define SUN4I_TVE_PORCH_BACK(x) ((x) << 16)
	60	#define SUN4I_TVE_PORCH_FRONT(x) (x)
	61
	62	#define SUN4I_TVE_LINE_REG 0x01c
	63	#define SUN4I_TVE_LINE_FIRST(x) ((x) << 16)
	64	#define SUN4I_TVE_LINE_NUMBER(x) (x)
65
66	#define SUN4I_TVE_LEVEL_REG 0x020
67	#define SUN4I_TVE_LEVEL_BLANK(x) ((x) << 16)
68	#define SUN4I_TVE_LEVEL_BLACK(x) (x)
69
70	#define SUN4I_TVE_DAC1_REG 0x024
71	#define SUN4I_TVE_DAC1_AMPLITUDE(dac, x) ((x) << (dac * 8))
72
73	#define SUN4I_TVE_DETECT_STA_REG 0x038
74	#define SUN4I_TVE_DETECT_STA_DAC(dac) BIT((dac * 8))
75	#define SUN4I_TVE_DETECT_STA_UNCONNECTED 0
76	#define SUN4I_TVE_DETECT_STA_CONNECTED 1
77	#define SUN4I_TVE_DETECT_STA_GROUND 2
78
79	#define SUN4I_TVE_CB_CR_LVL_REG 0x10c
80	#define SUN4I_TVE_CB_CR_LVL_CR_BURST(x) ((x) << 8)
81	#define SUN4I_TVE_CB_CR_LVL_CB_BURST(x) (x)
82
83	#define SUN4I_TVE_TINT_BURST_PHASE_REG 0x110
84	#define SUN4I_TVE_TINT_BURST_PHASE_CHROMA(x) (x)
85
86	#define SUN4I_TVE_BURST_WIDTH_REG 0x114
87	#define SUN4I_TVE_BURST_WIDTH_BREEZEWAY(x) ((x) << 16)
88	#define SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(x) ((x) << 8)
89	#define SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(x) (x)
90
91	#define SUN4I_TVE_CB_CR_GAIN_REG 0x118
92	#define SUN4I_TVE_CB_CR_GAIN_CR(x) ((x) << 8)
93	#define SUN4I_TVE_CB_CR_GAIN_CB(x) (x)
94
95	#define SUN4I_TVE_SYNC_VBI_REG 0x11c
96	#define SUN4I_TVE_SYNC_VBI_SYNC(x) ((x) << 16)
97	#define SUN4I_TVE_SYNC_VBI_VBLANK(x) (x)
98
99	#define SUN4I_TVE_ACTIVE_LINE_REG 0x124
100	#define SUN4I_TVE_ACTIVE_LINE(x) (x)
101
102	#define SUN4I_TVE_CHROMA_REG 0x128
103	#define SUN4I_TVE_CHROMA_COMP_GAIN(x) ((x) & 3)
104	#define SUN4I_TVE_CHROMA_COMP_GAIN_50 SUN4I_TVE_CHROMA_COMP_GAIN(2)
105
106	#define SUN4I_TVE_12C_REG 0x12c
107	#define SUN4I_TVE_12C_NOTCH_WIDTH_WIDE BIT(8)
108	#define SUN4I_TVE_12C_COMP_YUV_EN BIT(0)
109
110	#define SUN4I_TVE_RESYNC_REG 0x130
111	#define SUN4I_TVE_RESYNC_FIELD BIT(31)
112	#define SUN4I_TVE_RESYNC_LINE(x) ((x) << 16)
113	#define SUN4I_TVE_RESYNC_PIXEL(x) (x)
114
115	#define SUN4I_TVE_SLAVE_REG 0x134
116
117	#define SUN4I_TVE_WSS_DATA2_REG 0x244
118
119	struct color_gains {
120	u16 cb;
121	u16 cr;
122	};
123
124	struct burst_levels {
125	u16 cb;
126	u16 cr;
127	};
128
129	struct video_levels {
130	u16 black;
131	u16 blank;
132	};
133
134	struct resync_parameters {
135	bool field;
136	u16 line;
137	u16 pixel;
138	};
139
140	struct tv_mode {
141	char *name;
142
143	u32 mode;
144	u32 chroma_freq;
145	u16 back_porch;
146	u16 front_porch;
147	u16 line_number;
148	u16 vblank_level;
149
150	u32 hdisplay;
151	u16 hfront_porch;
152	u16 hsync_len;
153	u16 hback_porch;
154
155	u32 vdisplay;
156	u16 vfront_porch;
157	u16 vsync_len;
158	u16 vback_porch;
159
160	bool yc_en;
161	bool dac3_en;
162	bool dac_bit25_en;
163
164	struct color_gains *color_gains;
165	struct burst_levels *burst_levels;
166	struct video_levels *video_levels;
167	struct resync_parameters *resync_params;
168	};
169
170	struct sun4i_tv {
171	struct drm_connector connector;
172	struct drm_encoder encoder;
173
174	struct clk *clk;
175	struct regmap *regs;
176	struct reset_control *reset;
177
178	struct sun4i_drv *drv;
179	};
180
2ff77b16 MR	181	struct video_levels ntsc_video_levels = {
	182	.black = 282, .blank = 240,
	183	};
	184
154f6950 MR	185	struct video_levels pal_video_levels = {
	186	.black = 252, .blank = 252,
	187	};
	188
2ff77b16 MR	189	struct burst_levels ntsc_burst_levels = {
	190	.cb = 79, .cr = 0,
	191	};
	192
154f6950 MR	193	struct burst_levels pal_burst_levels = {
	194	.cb = 40, .cr = 40,
	195	};
	196
2ff77b16 MR	197	struct color_gains ntsc_color_gains = {
	198	.cb = 160, .cr = 160,
	199	};
	200
154f6950 MR	201	struct color_gains pal_color_gains = {
	202	.cb = 224, .cr = 224,
	203	};
	204
2ff77b16 MR	205	struct resync_parameters ntsc_resync_parameters = {
	206	.field = false, .line = 14, .pixel = 12,
	207	};
	208
154f6950 MR	209	struct resync_parameters pal_resync_parameters = {
	210	.field = true, .line = 13, .pixel = 12,
	211	};
	212
03c4c71d	213	struct tv_mode tv_modes[] = {
2ff77b16 MR	214	{
	215	.name = "NTSC",
	216	.mode = SUN4I_TVE_CFG0_RES_480i,
	217	.chroma_freq = 0x21f07c1f,
	218	.yc_en = true,
	219	.dac3_en = true,
	220	.dac_bit25_en = true,
	221
	222	.back_porch = 118,
	223	.front_porch = 32,
	224	.line_number = 525,
	225
	226	.hdisplay = 720,
	227	.hfront_porch = 18,
	228	.hsync_len = 2,
	229	.hback_porch = 118,
	230
	231	.vdisplay = 480,
	232	.vfront_porch = 26,
	233	.vsync_len = 2,
	234	.vback_porch = 17,
	235
	236	.vblank_level = 240,
	237
	238	.color_gains = &ntsc_color_gains,
	239	.burst_levels = &ntsc_burst_levels,
	240	.video_levels = &ntsc_video_levels,
	241	.resync_params = &ntsc_resync_parameters,
	242	},
154f6950 MR	243	{
	244	.name = "PAL",
	245	.mode = SUN4I_TVE_CFG0_RES_576i,
	246	.chroma_freq = 0x2a098acb,
	247
	248	.back_porch = 138,
	249	.front_porch = 24,
	250	.line_number = 625,
	251
	252	.hdisplay = 720,
	253	.hfront_porch = 3,
	254	.hsync_len = 2,
	255	.hback_porch = 139,
	256
	257	.vdisplay = 576,
	258	.vfront_porch = 28,
	259	.vsync_len = 2,
	260	.vback_porch = 19,
	261
	262	.vblank_level = 252,
	263
	264	.color_gains = &pal_color_gains,
	265	.burst_levels = &pal_burst_levels,
	266	.video_levels = &pal_video_levels,
	267	.resync_params = &pal_resync_parameters,
	268	},
03c4c71d MR	269	};
	270
	271	static inline struct sun4i_tv *
	272	drm_encoder_to_sun4i_tv(struct drm_encoder *encoder)
	273	{
	274	return container_of(encoder, struct sun4i_tv,
	275	encoder);
	276	}
	277
	278	static inline struct sun4i_tv *
	279	drm_connector_to_sun4i_tv(struct drm_connector *connector)
	280	{
	281	return container_of(connector, struct sun4i_tv,
	282	connector);
	283	}
	284
	285	/*
	286	* FIXME: If only the drm_display_mode private field was usable, this
	287	* could go away...
	288	*
	289	* So far, it doesn't seem to be preserved when the mode is passed by
	290	* to mode_set for some reason.
	291	*/
	292	static struct tv_mode sun4i_tv_find_tv_by_mode(struct drm_display_mode mode)
	293	{
	294	int i;
	295
	296	/* First try to identify the mode by name */
	297	for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
	298	struct tv_mode *tv_mode = &tv_modes[i];
	299
	300	DRM_DEBUG_DRIVER("Comparing mode %s vs %s",
	301	mode->name, tv_mode->name);
	302
	303	if (!strcmp(mode->name, tv_mode->name))
	304	return tv_mode;
	305	}
	306
	307	/* Then by number of lines */
	308	for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
	309	struct tv_mode *tv_mode = &tv_modes[i];
	310
	311	DRM_DEBUG_DRIVER("Comparing mode %s vs %s (X: %d vs %d)",
	312	mode->name, tv_mode->name,
	313	mode->vdisplay, tv_mode->vdisplay);
	314
	315	if (mode->vdisplay == tv_mode->vdisplay)
	316	return tv_mode;
	317	}
	318
	319	return NULL;
	320	}
	321
	322	static void sun4i_tv_mode_to_drm_mode(struct tv_mode *tv_mode,
	323	struct drm_display_mode *mode)
	324	{
	325	DRM_DEBUG_DRIVER("Creating mode %s\n", mode->name);
	326
	327	mode->type = DRM_MODE_TYPE_DRIVER;
	328	mode->clock = 13500;
	329	mode->flags = DRM_MODE_FLAG_INTERLACE;
	330
	331	mode->hdisplay = tv_mode->hdisplay;
	332	mode->hsync_start = mode->hdisplay + tv_mode->hfront_porch;
333	mode->hsync_end = mode->hsync_start + tv_mode->hsync_len;
334	mode->htotal = mode->hsync_end + tv_mode->hback_porch;
335
336	mode->vdisplay = tv_mode->vdisplay;
337	mode->vsync_start = mode->vdisplay + tv_mode->vfront_porch;
338	mode->vsync_end = mode->vsync_start + tv_mode->vsync_len;
339	mode->vtotal = mode->vsync_end + tv_mode->vback_porch;
340	}
341
342	static int sun4i_tv_atomic_check(struct drm_encoder *encoder,
343	struct drm_crtc_state *crtc_state,
344	struct drm_connector_state *conn_state)
345	{
346	return 0;
347	}
348
349	static void sun4i_tv_disable(struct drm_encoder *encoder)
350	{
351	struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
352	struct sun4i_drv *drv = tv->drv;
353	struct sun4i_tcon *tcon = drv->tcon;
354
355	DRM_DEBUG_DRIVER("Disabling the TV Output\n");
356
357	sun4i_tcon_channel_disable(tcon, 1);
358
359	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
360	SUN4I_TVE_EN_ENABLE,
361	0);
362	sun4i_backend_disable_color_correction(drv->backend);
363	}
364
365	static void sun4i_tv_enable(struct drm_encoder *encoder)
366	{
367	struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
368	struct sun4i_drv *drv = tv->drv;
369	struct sun4i_tcon *tcon = drv->tcon;
370
371	DRM_DEBUG_DRIVER("Enabling the TV Output\n");
372
373	sun4i_backend_apply_color_correction(drv->backend);
374
375	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
376	SUN4I_TVE_EN_ENABLE,
377	SUN4I_TVE_EN_ENABLE);
378
379	sun4i_tcon_channel_enable(tcon, 1);
380	}
381
382	static void sun4i_tv_mode_set(struct drm_encoder *encoder,
383	struct drm_display_mode *mode,
384	struct drm_display_mode *adjusted_mode)
385	{
386	struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
387	struct sun4i_drv *drv = tv->drv;
388	struct sun4i_tcon *tcon = drv->tcon;
389	struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode);
390
391	sun4i_tcon1_mode_set(tcon, mode);
392
393	/* Enable and map the DAC to the output */
394	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
395	SUN4I_TVE_EN_DAC_MAP_MASK,
396	SUN4I_TVE_EN_DAC_MAP(0, 1) \|
397	SUN4I_TVE_EN_DAC_MAP(1, 2) \|
398	SUN4I_TVE_EN_DAC_MAP(2, 3) \|
399	SUN4I_TVE_EN_DAC_MAP(3, 4));
400
401	/* Set PAL settings */
402	regmap_write(tv->regs, SUN4I_TVE_CFG0_REG,
403	tv_mode->mode \|
404	(tv_mode->yc_en ? SUN4I_TVE_CFG0_YC_EN : 0) \|
405	SUN4I_TVE_CFG0_COMP_EN \|
406	SUN4I_TVE_CFG0_DAC_CONTROL_54M \|
407	SUN4I_TVE_CFG0_CORE_DATAPATH_54M \|
408	SUN4I_TVE_CFG0_CORE_CONTROL_54M);
409
410	/* Configure the DAC for a composite output */
411	regmap_write(tv->regs, SUN4I_TVE_DAC0_REG,
412	SUN4I_TVE_DAC0_DAC_EN(0) \|
413	(tv_mode->dac3_en ? SUN4I_TVE_DAC0_DAC_EN(3) : 0) \|
414	SUN4I_TVE_DAC0_INTERNAL_DAC_37_5_OHMS \|
415	SUN4I_TVE_DAC0_CHROMA_0_75 \|
416	SUN4I_TVE_DAC0_LUMA_0_4 \|
417	SUN4I_TVE_DAC0_CLOCK_INVERT \|
418	(tv_mode->dac_bit25_en ? BIT(25) : 0) \|
419	BIT(30));
420
421	/* Configure the sample delay between DAC0 and the other DAC */
422	regmap_write(tv->regs, SUN4I_TVE_NOTCH_REG,
423	SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(1, 0) \|
424	SUN4I_TVE_NOTCH_DAC0_TO_DAC_DLY(2, 0));
425
426	regmap_write(tv->regs, SUN4I_TVE_CHROMA_FREQ_REG,
427	tv_mode->chroma_freq);
428
429	/* Set the front and back porch */
430	regmap_write(tv->regs, SUN4I_TVE_PORCH_REG,
431	SUN4I_TVE_PORCH_BACK(tv_mode->back_porch) \|
432	SUN4I_TVE_PORCH_FRONT(tv_mode->front_porch));
433
434	/* Set the lines setup */
435	regmap_write(tv->regs, SUN4I_TVE_LINE_REG,
436	SUN4I_TVE_LINE_FIRST(22) \|
437	SUN4I_TVE_LINE_NUMBER(tv_mode->line_number));
438
439	regmap_write(tv->regs, SUN4I_TVE_LEVEL_REG,
440	SUN4I_TVE_LEVEL_BLANK(tv_mode->video_levels->blank) \|
441	SUN4I_TVE_LEVEL_BLACK(tv_mode->video_levels->black));
442
443	regmap_write(tv->regs, SUN4I_TVE_DAC1_REG,
444	SUN4I_TVE_DAC1_AMPLITUDE(0, 0x18) \|
445	SUN4I_TVE_DAC1_AMPLITUDE(1, 0x18) \|
446	SUN4I_TVE_DAC1_AMPLITUDE(2, 0x18) \|
447	SUN4I_TVE_DAC1_AMPLITUDE(3, 0x18));
448
449	regmap_write(tv->regs, SUN4I_TVE_CB_CR_LVL_REG,
450	SUN4I_TVE_CB_CR_LVL_CB_BURST(tv_mode->burst_levels->cb) \|
451	SUN4I_TVE_CB_CR_LVL_CR_BURST(tv_mode->burst_levels->cr));
452
453	/* Set burst width for a composite output */
454	regmap_write(tv->regs, SUN4I_TVE_BURST_WIDTH_REG,
455	SUN4I_TVE_BURST_WIDTH_HSYNC_WIDTH(126) \|
456	SUN4I_TVE_BURST_WIDTH_BURST_WIDTH(68) \|
457	SUN4I_TVE_BURST_WIDTH_BREEZEWAY(22));
458
459	regmap_write(tv->regs, SUN4I_TVE_CB_CR_GAIN_REG,
460	SUN4I_TVE_CB_CR_GAIN_CB(tv_mode->color_gains->cb) \|
461	SUN4I_TVE_CB_CR_GAIN_CR(tv_mode->color_gains->cr));
462
463	regmap_write(tv->regs, SUN4I_TVE_SYNC_VBI_REG,
464	SUN4I_TVE_SYNC_VBI_SYNC(0x10) \|
465	SUN4I_TVE_SYNC_VBI_VBLANK(tv_mode->vblank_level));
466
467	regmap_write(tv->regs, SUN4I_TVE_ACTIVE_LINE_REG,
468	SUN4I_TVE_ACTIVE_LINE(1440));
469
470	/* Set composite chroma gain to 50 % */
471	regmap_write(tv->regs, SUN4I_TVE_CHROMA_REG,
472	SUN4I_TVE_CHROMA_COMP_GAIN_50);
473
474	regmap_write(tv->regs, SUN4I_TVE_12C_REG,
475	SUN4I_TVE_12C_COMP_YUV_EN \|
476	SUN4I_TVE_12C_NOTCH_WIDTH_WIDE);
477
478	regmap_write(tv->regs, SUN4I_TVE_RESYNC_REG,
479	SUN4I_TVE_RESYNC_PIXEL(tv_mode->resync_params->pixel) \|
480	SUN4I_TVE_RESYNC_LINE(tv_mode->resync_params->line) \|
481	(tv_mode->resync_params->field ?
482	SUN4I_TVE_RESYNC_FIELD : 0));
483
484	regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0);
485
486	clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000);
487	}
488
489	static struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = {
490	.atomic_check = sun4i_tv_atomic_check,
491	.disable = sun4i_tv_disable,
492	.enable = sun4i_tv_enable,
493	.mode_set = sun4i_tv_mode_set,
494	};
495
496	static void sun4i_tv_destroy(struct drm_encoder *encoder)
497	{
498	drm_encoder_cleanup(encoder);
499	}
500
501	static struct drm_encoder_funcs sun4i_tv_funcs = {
502	.destroy = sun4i_tv_destroy,
503	};
504
505	static int sun4i_tv_comp_get_modes(struct drm_connector *connector)
506	{
507	int i;
508
509	for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
510	struct drm_display_mode *mode = drm_mode_create(connector->dev);
511	struct tv_mode *tv_mode = &tv_modes[i];
512
513	strcpy(mode->name, tv_mode->name);
514
515	sun4i_tv_mode_to_drm_mode(tv_mode, mode);
516	drm_mode_probed_add(connector, mode);
517	}
518
519	return i;
520	}
521
522	static int sun4i_tv_comp_mode_valid(struct drm_connector *connector,
523	struct drm_display_mode *mode)
524	{
525	/* TODO */
526	return MODE_OK;
527	}
528
529	static struct drm_encoder *
530	sun4i_tv_comp_best_encoder(struct drm_connector *connector)
531	{
532	struct sun4i_tv *tv = drm_connector_to_sun4i_tv(connector);
533
534	return &tv->encoder;
535	}
536
537	static struct drm_connector_helper_funcs sun4i_tv_comp_connector_helper_funcs = {
538	.get_modes = sun4i_tv_comp_get_modes,
539	.mode_valid = sun4i_tv_comp_mode_valid,
540	.best_encoder = sun4i_tv_comp_best_encoder,
541	};
542
543	static enum drm_connector_status
544	sun4i_tv_comp_connector_detect(struct drm_connector *connector, bool force)
545	{
546	return connector_status_connected;
547	}
548
549	static void
550	sun4i_tv_comp_connector_destroy(struct drm_connector *connector)
551	{
552	drm_connector_cleanup(connector);
553	}
554
555	static struct drm_connector_funcs sun4i_tv_comp_connector_funcs = {
556	.dpms = drm_atomic_helper_connector_dpms,
557	.detect = sun4i_tv_comp_connector_detect,
558	.fill_modes = drm_helper_probe_single_connector_modes,
559	.destroy = sun4i_tv_comp_connector_destroy,
560	.reset = drm_atomic_helper_connector_reset,
561	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
562	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
563	};
564
565	static struct regmap_config sun4i_tv_regmap_config = {
566	.reg_bits = 32,
567	.val_bits = 32,
568	.reg_stride = 4,
569	.max_register = SUN4I_TVE_WSS_DATA2_REG,
570	.name = "tv-encoder",
571	};
572
573	static int sun4i_tv_bind(struct device dev, struct device master,
574	void *data)
575	{
576	struct platform_device *pdev = to_platform_device(dev);
577	struct drm_device *drm = data;
578	struct sun4i_drv *drv = drm->dev_private;
579	struct sun4i_tv *tv;
580	struct resource *res;
581	void __iomem *regs;
582	int ret;
583
584	tv = devm_kzalloc(dev, sizeof(*tv), GFP_KERNEL);
585	if (!tv)
586	return -ENOMEM;
587	tv->drv = drv;
588	dev_set_drvdata(dev, tv);
589
590	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
591	regs = devm_ioremap_resource(dev, res);
592	if (IS_ERR(regs)) {
593	dev_err(dev, "Couldn't map the TV encoder registers\n");
594	return PTR_ERR(regs);
595	}
596
597	tv->regs = devm_regmap_init_mmio(dev, regs,
598	&sun4i_tv_regmap_config);
599	if (IS_ERR(tv->regs)) {
600	dev_err(dev, "Couldn't create the TV encoder regmap\n");
601	return PTR_ERR(tv->regs);
602	}
603
604	tv->reset = devm_reset_control_get(dev, NULL);
605	if (IS_ERR(tv->reset)) {
606	dev_err(dev, "Couldn't get our reset line\n");
607	return PTR_ERR(tv->reset);
608	}
609
610	ret = reset_control_deassert(tv->reset);
611	if (ret) {
612	dev_err(dev, "Couldn't deassert our reset line\n");
613	return ret;
614	}
615
616	tv->clk = devm_clk_get(dev, NULL);
617	if (IS_ERR(tv->clk)) {
618	dev_err(dev, "Couldn't get the TV encoder clock\n");
619	ret = PTR_ERR(tv->clk);
620	goto err_assert_reset;
621	}
622	clk_prepare_enable(tv->clk);
623
624	drm_encoder_helper_add(&tv->encoder,
625	&sun4i_tv_helper_funcs);
626	ret = drm_encoder_init(drm,
627	&tv->encoder,
628	&sun4i_tv_funcs,
629	DRM_MODE_ENCODER_TVDAC,
630	NULL);
631	if (ret) {
632	dev_err(dev, "Couldn't initialise the TV encoder\n");
633	goto err_disable_clk;
634	}
635
636	tv->encoder.possible_crtcs = BIT(0);
637
638	drm_connector_helper_add(&tv->connector,
639	&sun4i_tv_comp_connector_helper_funcs);
640	ret = drm_connector_init(drm, &tv->connector,
641	&sun4i_tv_comp_connector_funcs,
642	DRM_MODE_CONNECTOR_Composite);
643	if (ret) {
644	dev_err(dev,
645	"Couldn't initialise the Composite connector\n");
646	goto err_cleanup_connector;
647	}
648	tv->connector.interlace_allowed = true;
649
650	drm_mode_connector_attach_encoder(&tv->connector, &tv->encoder);
651
652	return 0;
653
654	err_cleanup_connector:
655	drm_encoder_cleanup(&tv->encoder);
656	err_disable_clk:
657	clk_disable_unprepare(tv->clk);
658	err_assert_reset:
659	reset_control_assert(tv->reset);
660	return ret;
661	}
662
663	static void sun4i_tv_unbind(struct device dev, struct device master,
664	void *data)
665	{
666	struct sun4i_tv *tv = dev_get_drvdata(dev);
667
668	drm_connector_cleanup(&tv->connector);
669	drm_encoder_cleanup(&tv->encoder);
670	clk_disable_unprepare(tv->clk);
671	}
672
673	static struct component_ops sun4i_tv_ops = {
674	.bind = sun4i_tv_bind,
675	.unbind = sun4i_tv_unbind,
676	};
677
678	static int sun4i_tv_probe(struct platform_device *pdev)
679	{
680	return component_add(&pdev->dev, &sun4i_tv_ops);
681	}
682
683	static int sun4i_tv_remove(struct platform_device *pdev)
684	{
685	component_del(&pdev->dev, &sun4i_tv_ops);
686
687	return 0;
688	}
689
690	static const struct of_device_id sun4i_tv_of_table[] = {
691	{ .compatible = "allwinner,sun4i-a10-tv-encoder" },
692	{ }
693	};
694	MODULE_DEVICE_TABLE(of, sun4i_tv_of_table);
695
696	static struct platform_driver sun4i_tv_platform_driver = {
697	.probe = sun4i_tv_probe,
698	.remove = sun4i_tv_remove,
699	.driver = {
700	.name = "sun4i-tve",
701	.of_match_table = sun4i_tv_of_table,
702	},
703	};
704	module_platform_driver(sun4i_tv_platform_driver);
705
706	MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
707	MODULE_DESCRIPTION("Allwinner A10 TV Encoder Driver");
708	MODULE_LICENSE("GPL");