1 files changed, 0 insertions, 527 deletions
diff --git a/drivers/gpu/drm/zte/zx_vga.c b/drivers/gpu/drm/zte/zx_vga.c
deleted file mode 100644
index 0f9bbb7e3b8d..000000000000
--- a/drivers/gpu/drm/zte/zx_vga.c
+++ /dev/null
@@ -1,527 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2017 Sanechips Technology Co., Ltd.
- * Copyright 2017 Linaro Ltd.
- */
-
-#include <linux/clk.h>
-#include <linux/component.h>
-#include <linux/mfd/syscon.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/regmap.h>
-
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_print.h>
-#include <drm/drm_probe_helper.h>
-#include <drm/drm_simple_kms_helper.h>
-
-#include "zx_drm_drv.h"
-#include "zx_vga_regs.h"
-#include "zx_vou.h"
-
-struct zx_vga_pwrctrl {
-	struct regmap *regmap;
-	u32 reg;
-	u32 mask;
-};
-
-struct zx_vga_i2c {
-	struct i2c_adapter adap;
-	struct mutex lock;
-};
-
-struct zx_vga {
-	struct drm_connector connector;
-	struct drm_encoder encoder;
-	struct zx_vga_i2c *ddc;
-	struct device *dev;
-	void __iomem *mmio;
-	struct clk *i2c_wclk;
-	struct zx_vga_pwrctrl pwrctrl;
-	struct completion complete;
-	bool connected;
-};
-
-#define to_zx_vga(x) container_of(x, struct zx_vga, x)
-
-static void zx_vga_encoder_enable(struct drm_encoder *encoder)
-{
-	struct zx_vga *vga = to_zx_vga(encoder);
-	struct zx_vga_pwrctrl *pwrctrl = &vga->pwrctrl;
-
-	/* Set bit to power up VGA DACs */
-	regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask,
-			   pwrctrl->mask);
-
-	vou_inf_enable(VOU_VGA, encoder->crtc);
-}
-
-static void zx_vga_encoder_disable(struct drm_encoder *encoder)
-{
-	struct zx_vga *vga = to_zx_vga(encoder);
-	struct zx_vga_pwrctrl *pwrctrl = &vga->pwrctrl;
-
-	vou_inf_disable(VOU_VGA, encoder->crtc);
-
-	/* Clear bit to power down VGA DACs */
-	regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask, 0);
-}
-
-static const struct drm_encoder_helper_funcs zx_vga_encoder_helper_funcs = {
-	.enable	= zx_vga_encoder_enable,
-	.disable = zx_vga_encoder_disable,
-};
-
-static int zx_vga_connector_get_modes(struct drm_connector *connector)
-{
-	struct zx_vga *vga = to_zx_vga(connector);
-	struct edid *edid;
-	int ret;
-
-	/*
-	 * Clear both detection bits to switch I2C bus from device
-	 * detecting to EDID reading.
-	 */
-	zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, 0);
-
-	edid = drm_get_edid(connector, &vga->ddc->adap);
-	if (!edid) {
-		/*
-		 * If EDID reading fails, we set the device state into
-		 * disconnected.  Locking is not required here, since the
-		 * VGA_AUTO_DETECT_SEL register write in irq handler cannot
-		 * be triggered when both detection bits are cleared as above.
-		 */
-		zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL,
-			  VGA_DETECT_SEL_NO_DEVICE);
-		vga->connected = false;
-		return 0;
-	}
-
-	/*
-	 * As edid reading succeeds, device must be connected, so we set
-	 * up detection bit for unplug interrupt here.
-	 */
-	zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, VGA_DETECT_SEL_HAS_DEVICE);
-
-	drm_connector_update_edid_property(connector, edid);
-	ret = drm_add_edid_modes(connector, edid);
-	kfree(edid);
-
-	return ret;
-}
-
-static enum drm_mode_status
-zx_vga_connector_mode_valid(struct drm_connector *connector,
-			    struct drm_display_mode *mode)
-{
-	return MODE_OK;
-}
-
-static struct drm_connector_helper_funcs zx_vga_connector_helper_funcs = {
-	.get_modes = zx_vga_connector_get_modes,
-	.mode_valid = zx_vga_connector_mode_valid,
-};
-
-static enum drm_connector_status
-zx_vga_connector_detect(struct drm_connector *connector, bool force)
-{
-	struct zx_vga *vga = to_zx_vga(connector);
-
-	return vga->connected ? connector_status_connected :
-				connector_status_disconnected;
-}
-
-static const struct drm_connector_funcs zx_vga_connector_funcs = {
-	.fill_modes = drm_helper_probe_single_connector_modes,
-	.detect = zx_vga_connector_detect,
-	.destroy = drm_connector_cleanup,
-	.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 int zx_vga_register(struct drm_device *drm, struct zx_vga *vga)
-{
-	struct drm_encoder *encoder = &vga->encoder;
-	struct drm_connector *connector = &vga->connector;
-	struct device *dev = vga->dev;
-	int ret;
-
-	encoder->possible_crtcs = VOU_CRTC_MASK;
-
-	ret = drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_DAC);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "failed to init encoder: %d\n", ret);
-		return ret;
-	}
-
-	drm_encoder_helper_add(encoder, &zx_vga_encoder_helper_funcs);
-
-	vga->connector.polled = DRM_CONNECTOR_POLL_HPD;
-
-	ret = drm_connector_init_with_ddc(drm, connector,
-					  &zx_vga_connector_funcs,
-					  DRM_MODE_CONNECTOR_VGA,
-					  &vga->ddc->adap);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "failed to init connector: %d\n", ret);
-		goto clean_encoder;
-	}
-
-	drm_connector_helper_add(connector, &zx_vga_connector_helper_funcs);
-
-	ret = drm_connector_attach_encoder(connector, encoder);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "failed to attach encoder: %d\n", ret);
-		goto clean_connector;
-	}
-
-	return 0;
-
-clean_connector:
-	drm_connector_cleanup(connector);
-clean_encoder:
-	drm_encoder_cleanup(encoder);
-	return ret;
-}
-
-static int zx_vga_pwrctrl_init(struct zx_vga *vga)
-{
-	struct zx_vga_pwrctrl *pwrctrl = &vga->pwrctrl;
-	struct device *dev = vga->dev;
-	struct of_phandle_args out_args;
-	struct regmap *regmap;
-	int ret;
-
-	ret = of_parse_phandle_with_fixed_args(dev->of_node,
-				"zte,vga-power-control", 2, 0, &out_args);
-	if (ret)
-		return ret;
-
-	regmap = syscon_node_to_regmap(out_args.np);
-	if (IS_ERR(regmap)) {
-		ret = PTR_ERR(regmap);
-		goto out;
-	}
-
-	pwrctrl->regmap = regmap;
-	pwrctrl->reg = out_args.args[0];
-	pwrctrl->mask = out_args.args[1];
-
-out:
-	of_node_put(out_args.np);
-	return ret;
-}
-
-static int zx_vga_i2c_read(struct zx_vga *vga, struct i2c_msg *msg)
-{
-	int len = msg->len;
-	u8 *buf = msg->buf;
-	u32 offset = 0;
-	int i;
-
-	reinit_completion(&vga->complete);
-
-	/* Select combo write */
-	zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_COMBO, VGA_CMD_COMBO);
-	zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_RW, 0);
-
-	while (len > 0) {
-		u32 cnt;
-
-		/* Clear RX FIFO */
-		zx_writel_mask(vga->mmio + VGA_RXF_CTRL, VGA_RX_FIFO_CLEAR,
-			       VGA_RX_FIFO_CLEAR);
-
-		/* Data offset to read from */
-		zx_writel(vga->mmio + VGA_SUB_ADDR, offset);
-
-		/* Kick off the transfer */
-		zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_TRANS,
-			       VGA_CMD_TRANS);
-
-		if (!wait_for_completion_timeout(&vga->complete,
-						 msecs_to_jiffies(1000))) {
-			DRM_DEV_ERROR(vga->dev, "transfer timeout\n");
-			return -ETIMEDOUT;
-		}
-
-		cnt = zx_readl(vga->mmio + VGA_RXF_STATUS);
-		cnt = (cnt & VGA_RXF_COUNT_MASK) >> VGA_RXF_COUNT_SHIFT;
-		/* FIFO status may report more data than we need to read */
-		cnt = min_t(u32, len, cnt);
-
-		for (i = 0; i < cnt; i++)
-			*buf++ = zx_readl(vga->mmio + VGA_DATA);
-
-		len -= cnt;
-		offset += cnt;
-	}
-
-	return 0;
-}
-
-static int zx_vga_i2c_write(struct zx_vga *vga, struct i2c_msg *msg)
-{
-	/*
-	 * The DDC I2C adapter is only for reading EDID data, so we assume
-	 * that the write to this adapter must be the EDID data offset.
-	 */
-	if ((msg->len != 1) || ((msg->addr != DDC_ADDR)))
-		return -EINVAL;
-
-	/* Hardware will take care of the slave address shifting */
-	zx_writel(vga->mmio + VGA_DEVICE_ADDR, msg->addr);
-
-	return 0;
-}
-
-static int zx_vga_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
-			   int num)
-{
-	struct zx_vga *vga = i2c_get_adapdata(adap);
-	struct zx_vga_i2c *ddc = vga->ddc;
-	int ret = 0;
-	int i;
-
-	mutex_lock(&ddc->lock);
-
-	for (i = 0; i < num; i++) {
-		if (msgs[i].flags & I2C_M_RD)
-			ret = zx_vga_i2c_read(vga, &msgs[i]);
-		else
-			ret = zx_vga_i2c_write(vga, &msgs[i]);
-
-		if (ret < 0)
-			break;
-	}
-
-	if (!ret)
-		ret = num;
-
-	mutex_unlock(&ddc->lock);
-
-	return ret;
-}
-
-static u32 zx_vga_i2c_func(struct i2c_adapter *adapter)
-{
-	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
-}
-
-static const struct i2c_algorithm zx_vga_algorithm = {
-	.master_xfer	= zx_vga_i2c_xfer,
-	.functionality	= zx_vga_i2c_func,
-};
-
-static int zx_vga_ddc_register(struct zx_vga *vga)
-{
-	struct device *dev = vga->dev;
-	struct i2c_adapter *adap;
-	struct zx_vga_i2c *ddc;
-	int ret;
-
-	ddc = devm_kzalloc(dev, sizeof(*ddc), GFP_KERNEL);
-	if (!ddc)
-		return -ENOMEM;
-
-	vga->ddc = ddc;
-	mutex_init(&ddc->lock);
-
-	adap = &ddc->adap;
-	adap->owner = THIS_MODULE;
-	adap->class = I2C_CLASS_DDC;
-	adap->dev.parent = dev;
-	adap->algo = &zx_vga_algorithm;
-	snprintf(adap->name, sizeof(adap->name), "zx vga i2c");
-
-	ret = i2c_add_adapter(adap);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "failed to add I2C adapter: %d\n", ret);
-		return ret;
-	}
-
-	i2c_set_adapdata(adap, vga);
-
-	return 0;
-}
-
-static irqreturn_t zx_vga_irq_thread(int irq, void *dev_id)
-{
-	struct zx_vga *vga = dev_id;
-
-	drm_helper_hpd_irq_event(vga->connector.dev);
-
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t zx_vga_irq_handler(int irq, void *dev_id)
-{
-	struct zx_vga *vga = dev_id;
-	u32 status;
-
-	status = zx_readl(vga->mmio + VGA_I2C_STATUS);
-
-	/* Clear interrupt status */
-	zx_writel_mask(vga->mmio + VGA_I2C_STATUS, VGA_CLEAR_IRQ,
-		       VGA_CLEAR_IRQ);
-
-	if (status & VGA_DEVICE_CONNECTED) {
-		/*
-		 * Since VGA_DETECT_SEL bits need to be reset for switching DDC
-		 * bus from device detection to EDID read, rather than setting
-		 * up HAS_DEVICE bit here, we need to do that in .get_modes
-		 * hook for unplug detecting after EDID read succeeds.
-		 */
-		vga->connected = true;
-		return IRQ_WAKE_THREAD;
-	}
-
-	if (status & VGA_DEVICE_DISCONNECTED) {
-		zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL,
-			  VGA_DETECT_SEL_NO_DEVICE);
-		vga->connected = false;
-		return IRQ_WAKE_THREAD;
-	}
-
-	if (status & VGA_TRANS_DONE) {
-		complete(&vga->complete);
-		return IRQ_HANDLED;
-	}
-
-	return IRQ_NONE;
-}
-
-static void zx_vga_hw_init(struct zx_vga *vga)
-{
-	unsigned long ref = clk_get_rate(vga->i2c_wclk);
-	int div;
-
-	/*
-	 * Set up I2C fast speed divider per formula below to get 400kHz.
-	 *   scl = ref / ((div + 1) * 4)
-	 */
-	div = DIV_ROUND_UP(ref / 1000, 400 * 4) - 1;
-	zx_writel(vga->mmio + VGA_CLK_DIV_FS, div);
-
-	/* Set up device detection */
-	zx_writel(vga->mmio + VGA_AUTO_DETECT_PARA, 0x80);
-	zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, VGA_DETECT_SEL_NO_DEVICE);
-
-	/*
-	 * We need to poke monitor via DDC bus to get connection irq
-	 * start working.
-	 */
-	zx_writel(vga->mmio + VGA_DEVICE_ADDR, DDC_ADDR);
-	zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_TRANS, VGA_CMD_TRANS);
-}
-
-static int zx_vga_bind(struct device *dev, struct device *master, void *data)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct drm_device *drm = data;
-	struct resource *res;
-	struct zx_vga *vga;
-	int irq;
-	int ret;
-
-	vga = devm_kzalloc(dev, sizeof(*vga), GFP_KERNEL);
-	if (!vga)
-		return -ENOMEM;
-
-	vga->dev = dev;
-	dev_set_drvdata(dev, vga);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	vga->mmio = devm_ioremap_resource(dev, res);
-	if (IS_ERR(vga->mmio))
-		return PTR_ERR(vga->mmio);
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return irq;
-
-	vga->i2c_wclk = devm_clk_get(dev, "i2c_wclk");
-	if (IS_ERR(vga->i2c_wclk)) {
-		ret = PTR_ERR(vga->i2c_wclk);
-		DRM_DEV_ERROR(dev, "failed to get i2c_wclk: %d\n", ret);
-		return ret;
-	}
-
-	ret = zx_vga_pwrctrl_init(vga);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "failed to init power control: %d\n", ret);
-		return ret;
-	}
-
-	ret = zx_vga_ddc_register(vga);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "failed to register ddc: %d\n", ret);
-		return ret;
-	}
-
-	ret = zx_vga_register(drm, vga);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "failed to register vga: %d\n", ret);
-		return ret;
-	}
-
-	init_completion(&vga->complete);
-
-	ret = devm_request_threaded_irq(dev, irq, zx_vga_irq_handler,
-					zx_vga_irq_thread, IRQF_SHARED,
-					dev_name(dev), vga);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "failed to request threaded irq: %d\n", ret);
-		return ret;
-	}
-
-	ret = clk_prepare_enable(vga->i2c_wclk);
-	if (ret)
-		return ret;
-
-	zx_vga_hw_init(vga);
-
-	return 0;
-}
-
-static void zx_vga_unbind(struct device *dev, struct device *master,
-			  void *data)
-{
-	struct zx_vga *vga = dev_get_drvdata(dev);
-
-	clk_disable_unprepare(vga->i2c_wclk);
-}
-
-static const struct component_ops zx_vga_component_ops = {
-	.bind = zx_vga_bind,
-	.unbind = zx_vga_unbind,
-};
-
-static int zx_vga_probe(struct platform_device *pdev)
-{
-	return component_add(&pdev->dev, &zx_vga_component_ops);
-}
-
-static int zx_vga_remove(struct platform_device *pdev)
-{
-	component_del(&pdev->dev, &zx_vga_component_ops);
-	return 0;
-}
-
-static const struct of_device_id zx_vga_of_match[] = {
-	{ .compatible = "zte,zx296718-vga", },
-	{ /* end */ },
-};
-MODULE_DEVICE_TABLE(of, zx_vga_of_match);
-
-struct platform_driver zx_vga_driver = {
-	.probe = zx_vga_probe,
-	.remove = zx_vga_remove,
-	.driver	= {
-		.name = "zx-vga",
-		.of_match_table	= zx_vga_of_match,
-	},
-};