drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /* Hisilicon Hibmc SoC drm driver
  *
  * Based on the bochs drm driver.
  *
  * Copyright (c) 2016 Huawei Limited.
  *
  * Author:
  *	Rongrong Zou <zourongrong@huawei.com>
  *	Rongrong Zou <zourongrong@gmail.com>
  *	Jianhua Li <lijianhua@huawei.com>
  */

 #include <linux/module.h>
 #include <linux/pci.h>

 #include <drm/drm_aperture.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_gem_vram_helper.h>
 #include <drm/drm_managed.h>
 #include <drm/drm_vblank.h>

 #include "hibmc_drm_drv.h"
 #include "hibmc_drm_regs.h"

 DEFINE_DRM_GEM_FOPS(hibmc_fops);

 static irqreturn_t hibmc_interrupt(int irq, void *arg)
 {
 	struct drm_device *dev = (struct drm_device *)arg;
 	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
 	u32 status;

 	status = readl(priv->mmio + HIBMC_RAW_INTERRUPT);

 	if (status & HIBMC_RAW_INTERRUPT_VBLANK(1)) {
 		writel(HIBMC_RAW_INTERRUPT_VBLANK(1),
 		       priv->mmio + HIBMC_RAW_INTERRUPT);
 		drm_handle_vblank(dev, 0);
 	}

 	return IRQ_HANDLED;
 }

 static int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
 			     struct drm_mode_create_dumb *args)
 {
 	return drm_gem_vram_fill_create_dumb(file, dev, 0, 128, args);
 }

 static const struct drm_driver hibmc_driver = {
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 	.fops			= &hibmc_fops,
 	.name			= "hibmc",
 	.date			= "20160828",
 	.desc			= "hibmc drm driver",
 	.major			= 1,
 	.minor			= 0,
 	.debugfs_init		= drm_vram_mm_debugfs_init,
 	.dumb_create            = hibmc_dumb_create,
 	.dumb_map_offset        = drm_gem_ttm_dumb_map_offset,
 	.gem_prime_mmap		= drm_gem_prime_mmap,
 };

 static int __maybe_unused hibmc_pm_suspend(struct device *dev)
 {
 	struct drm_device *drm_dev = dev_get_drvdata(dev);

 	return drm_mode_config_helper_suspend(drm_dev);
 }

 static int  __maybe_unused hibmc_pm_resume(struct device *dev)
 {
 	struct drm_device *drm_dev = dev_get_drvdata(dev);

 	return drm_mode_config_helper_resume(drm_dev);
 }

 static const struct dev_pm_ops hibmc_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(hibmc_pm_suspend,
 				hibmc_pm_resume)
 };

 static const struct drm_mode_config_funcs hibmc_mode_funcs = {
 	.mode_valid = drm_vram_helper_mode_valid,
 	.atomic_check = drm_atomic_helper_check,
 	.atomic_commit = drm_atomic_helper_commit,
 	.fb_create = drm_gem_fb_create,
 };

 static int hibmc_kms_init(struct hibmc_drm_private *priv)
 {
 	struct drm_device *dev = &priv->dev;
 	int ret;

 	ret = drmm_mode_config_init(dev);
 	if (ret)
 		return ret;

 	dev->mode_config.min_width = 0;
 	dev->mode_config.min_height = 0;
 	dev->mode_config.max_width = 1920;
 	dev->mode_config.max_height = 1200;

 	dev->mode_config.fb_base = priv->fb_base;
 	dev->mode_config.preferred_depth = 32;
 	dev->mode_config.prefer_shadow = 1;

 	dev->mode_config.funcs = (void *)&hibmc_mode_funcs;

 	ret = hibmc_de_init(priv);
 	if (ret) {
 		drm_err(dev, "failed to init de: %d\n", ret);
 		return ret;
 	}

 	ret = hibmc_vdac_init(priv);
 	if (ret) {
 		drm_err(dev, "failed to init vdac: %d\n", ret);
 		return ret;
 	}

 	return 0;
 }

 /*
  * It can operate in one of three modes: 0, 1 or Sleep.
  */
 void hibmc_set_power_mode(struct hibmc_drm_private *priv, u32 power_mode)
 {
 	u32 control_value = 0;
 	void __iomem   *mmio = priv->mmio;
 	u32 input = 1;

 	if (power_mode > HIBMC_PW_MODE_CTL_MODE_SLEEP)
 		return;

 	if (power_mode == HIBMC_PW_MODE_CTL_MODE_SLEEP)
 		input = 0;

 	control_value = readl(mmio + HIBMC_POWER_MODE_CTRL);
 	control_value &= ~(HIBMC_PW_MODE_CTL_MODE_MASK |
 			   HIBMC_PW_MODE_CTL_OSC_INPUT_MASK);
 	control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_MODE, power_mode);
 	control_value |= HIBMC_FIELD(HIBMC_PW_MODE_CTL_OSC_INPUT, input);
 	writel(control_value, mmio + HIBMC_POWER_MODE_CTRL);
 }

 void hibmc_set_current_gate(struct hibmc_drm_private *priv, unsigned int gate)
 {
 	u32 gate_reg;
 	u32 mode;
 	void __iomem   *mmio = priv->mmio;

 	/* Get current power mode. */
 	mode = (readl(mmio + HIBMC_POWER_MODE_CTRL) &
 		HIBMC_PW_MODE_CTL_MODE_MASK) >> HIBMC_PW_MODE_CTL_MODE_SHIFT;

 	switch (mode) {
 	case HIBMC_PW_MODE_CTL_MODE_MODE0:
 		gate_reg = HIBMC_MODE0_GATE;
 		break;

 	case HIBMC_PW_MODE_CTL_MODE_MODE1:
 		gate_reg = HIBMC_MODE1_GATE;
 		break;

 	default:
 		gate_reg = HIBMC_MODE0_GATE;
 		break;
 	}
 	writel(gate, mmio + gate_reg);
 }

 static void hibmc_hw_config(struct hibmc_drm_private *priv)
 {
 	u32 reg;

 	/* On hardware reset, power mode 0 is default. */
 	hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);

 	/* Enable display power gate & LOCALMEM power gate*/
 	reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
 	reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
 	reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
 	reg |= HIBMC_CURR_GATE_DISPLAY(1);
 	reg |= HIBMC_CURR_GATE_LOCALMEM(1);

 	hibmc_set_current_gate(priv, reg);

 	/*
 	 * Reset the memory controller. If the memory controller
 	 * is not reset in chip,the system might hang when sw accesses
 	 * the memory.The memory should be resetted after
 	 * changing the MXCLK.
 	 */
 	reg = readl(priv->mmio + HIBMC_MISC_CTRL);
 	reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
 	reg |= HIBMC_MSCCTL_LOCALMEM_RESET(0);
 	writel(reg, priv->mmio + HIBMC_MISC_CTRL);

 	reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
 	reg |= HIBMC_MSCCTL_LOCALMEM_RESET(1);

 	writel(reg, priv->mmio + HIBMC_MISC_CTRL);
 }

 static int hibmc_hw_map(struct hibmc_drm_private *priv)
 {
 	struct drm_device *dev = &priv->dev;
 	struct pci_dev *pdev = to_pci_dev(dev->dev);
 	resource_size_t addr, size, ioaddr, iosize;

 	ioaddr = pci_resource_start(pdev, 1);
 	iosize = pci_resource_len(pdev, 1);
 	priv->mmio = devm_ioremap(dev->dev, ioaddr, iosize);
 	if (!priv->mmio) {
 		drm_err(dev, "Cannot map mmio region\n");
 		return -ENOMEM;
 	}

 	addr = pci_resource_start(pdev, 0);
 	size = pci_resource_len(pdev, 0);
 	priv->fb_map = devm_ioremap(dev->dev, addr, size);
 	if (!priv->fb_map) {
 		drm_err(dev, "Cannot map framebuffer\n");
 		return -ENOMEM;
 	}
 	priv->fb_base = addr;
 	priv->fb_size = size;

 	return 0;
 }

 static int hibmc_hw_init(struct hibmc_drm_private *priv)
 {
 	int ret;

 	ret = hibmc_hw_map(priv);
 	if (ret)
 		return ret;

 	hibmc_hw_config(priv);

 	return 0;
 }

 static int hibmc_unload(struct drm_device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev->dev);

 	drm_atomic_helper_shutdown(dev);

 	free_irq(pdev->irq, dev);

 	pci_disable_msi(to_pci_dev(dev->dev));

 	return 0;
 }

 static int hibmc_load(struct drm_device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev->dev);
 	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
 	int ret;

 	ret = hibmc_hw_init(priv);
 	if (ret)
 		goto err;

 	ret = drmm_vram_helper_init(dev, pci_resource_start(pdev, 0), priv->fb_size);
 	if (ret) {
 		drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
 		goto err;
 	}

 	ret = hibmc_kms_init(priv);
 	if (ret)
 		goto err;

 	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
 	if (ret) {
 		drm_err(dev, "failed to initialize vblank: %d\n", ret);
 		goto err;
 	}

 	ret = pci_enable_msi(pdev);
 	if (ret) {
 		drm_warn(dev, "enabling MSI failed: %d\n", ret);
 	} else {
 		/* PCI devices require shared interrupts. */
 		ret = request_irq(pdev->irq, hibmc_interrupt, IRQF_SHARED,
 				  dev->driver->name, dev);
 		if (ret)
 			drm_warn(dev, "install irq failed: %d\n", ret);
 	}

 	/* reset all the states of crtc/plane/encoder/connector */
 	drm_mode_config_reset(dev);

 	return 0;

 err:
 	hibmc_unload(dev);
 	drm_err(dev, "failed to initialize drm driver: %d\n", ret);
 	return ret;
 }

 static int hibmc_pci_probe(struct pci_dev *pdev,
 			   const struct pci_device_id *ent)
 {
 	struct hibmc_drm_private *priv;
 	struct drm_device *dev;
 	int ret;

 	ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &hibmc_driver);
 	if (ret)
 		return ret;

 	priv = devm_drm_dev_alloc(&pdev->dev, &hibmc_driver,
 				  struct hibmc_drm_private, dev);
 	if (IS_ERR(priv)) {
 		DRM_ERROR("failed to allocate drm_device\n");
 		return PTR_ERR(priv);
 	}

 	dev = &priv->dev;
 	pci_set_drvdata(pdev, dev);

 	ret = pcim_enable_device(pdev);
 	if (ret) {
 		drm_err(dev, "failed to enable pci device: %d\n", ret);
 		goto err_return;
 	}

 	ret = hibmc_load(dev);
 	if (ret) {
 		drm_err(dev, "failed to load hibmc: %d\n", ret);
 		goto err_return;
 	}

 	ret = drm_dev_register(dev, 0);
 	if (ret) {
 		drm_err(dev, "failed to register drv for userspace access: %d\n",
 			  ret);
 		goto err_unload;
 	}

 	drm_fbdev_generic_setup(dev, dev->mode_config.preferred_depth);

 	return 0;

 err_unload:
 	hibmc_unload(dev);
 err_return:
 	return ret;
 }

 static void hibmc_pci_remove(struct pci_dev *pdev)
 {
 	struct drm_device *dev = pci_get_drvdata(pdev);

 	drm_dev_unregister(dev);
 	hibmc_unload(dev);
 }

 static const struct pci_device_id hibmc_pci_table[] = {
 	{ PCI_VDEVICE(HUAWEI, 0x1711) },
 	{0,}
 };

 static struct pci_driver hibmc_pci_driver = {
 	.name =		"hibmc-drm",
 	.id_table =	hibmc_pci_table,
 	.probe =	hibmc_pci_probe,
 	.remove =	hibmc_pci_remove,
 	.driver.pm =    &hibmc_pm_ops,
 };

 module_pci_driver(hibmc_pci_driver);

 MODULE_DEVICE_TABLE(pci, hibmc_pci_table);
 MODULE_AUTHOR("RongrongZou <zourongrong@huawei.com>");
 MODULE_DESCRIPTION("DRM Driver for Hisilicon Hibmc");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: GPL-2.0-or-later
	/* Hisilicon Hibmc SoC drm driver
	*
	* Based on the bochs drm driver.
	*
	* Copyright (c) 2016 Huawei Limited.
	*
	* Author:
	* Rongrong Zou <zourongrong@huawei.com>
	* Rongrong Zou <zourongrong@gmail.com>
	* Jianhua Li <lijianhua@huawei.com>
	*/

	#include <linux/module.h>
	#include <linux/pci.h>

	#include <drm/drm_aperture.h>
	#include <drm/drm_atomic_helper.h>
	#include <drm/drm_drv.h>
	#include <drm/drm_gem_framebuffer_helper.h>
	#include <drm/drm_gem_vram_helper.h>
	#include <drm/drm_managed.h>
	#include <drm/drm_vblank.h>

	#include "hibmc_drm_drv.h"
	#include "hibmc_drm_regs.h"

	DEFINE_DRM_GEM_FOPS(hibmc_fops);

	static irqreturn_t hibmc_interrupt(int irq, void *arg)
	{
	struct drm_device dev = (struct drm_device )arg;
	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
	u32 status;

	status = readl(priv->mmio + HIBMC_RAW_INTERRUPT);

	if (status & HIBMC_RAW_INTERRUPT_VBLANK(1)) {
	writel(HIBMC_RAW_INTERRUPT_VBLANK(1),
	priv->mmio + HIBMC_RAW_INTERRUPT);
	drm_handle_vblank(dev, 0);
	}

	return IRQ_HANDLED;
	}

	static int hibmc_dumb_create(struct drm_file file, struct drm_device dev,
	struct drm_mode_create_dumb *args)
	{
	return drm_gem_vram_fill_create_dumb(file, dev, 0, 128, args);
	}

	static const struct drm_driver hibmc_driver = {
	.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_ATOMIC,
	.fops = &hibmc_fops,
	.name = "hibmc",
	.date = "20160828",
	.desc = "hibmc drm driver",
	.major = 1,
	.minor = 0,
	.debugfs_init = drm_vram_mm_debugfs_init,
	.dumb_create = hibmc_dumb_create,
	.dumb_map_offset = drm_gem_ttm_dumb_map_offset,
	.gem_prime_mmap = drm_gem_prime_mmap,
	};

	static int __maybe_unused hibmc_pm_suspend(struct device *dev)
	{
	struct drm_device *drm_dev = dev_get_drvdata(dev);

	return drm_mode_config_helper_suspend(drm_dev);
	}

	static int __maybe_unused hibmc_pm_resume(struct device *dev)
	{
	struct drm_device *drm_dev = dev_get_drvdata(dev);

	return drm_mode_config_helper_resume(drm_dev);
	}

	static const struct dev_pm_ops hibmc_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(hibmc_pm_suspend,
	hibmc_pm_resume)
	};

	static const struct drm_mode_config_funcs hibmc_mode_funcs = {
	.mode_valid = drm_vram_helper_mode_valid,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
	.fb_create = drm_gem_fb_create,
	};

	static int hibmc_kms_init(struct hibmc_drm_private *priv)
	{
	struct drm_device *dev = &priv->dev;
	int ret;

	ret = drmm_mode_config_init(dev);
	if (ret)
	return ret;

	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;
	dev->mode_config.max_width = 1920;
	dev->mode_config.max_height = 1200;

	dev->mode_config.fb_base = priv->fb_base;
	dev->mode_config.preferred_depth = 32;
	dev->mode_config.prefer_shadow = 1;

	dev->mode_config.funcs = (void *)&hibmc_mode_funcs;

	ret = hibmc_de_init(priv);
	if (ret) {
	drm_err(dev, "failed to init de: %d\n", ret);
	return ret;
	}

	ret = hibmc_vdac_init(priv);
	if (ret) {
	drm_err(dev, "failed to init vdac: %d\n", ret);
	return ret;
	}

	return 0;
	}

	/*
	* It can operate in one of three modes: 0, 1 or Sleep.
	*/
	void hibmc_set_power_mode(struct hibmc_drm_private *priv, u32 power_mode)
	{
	u32 control_value = 0;
	void __iomem *mmio = priv->mmio;
	u32 input = 1;

	if (power_mode > HIBMC_PW_MODE_CTL_MODE_SLEEP)
	return;

	if (power_mode == HIBMC_PW_MODE_CTL_MODE_SLEEP)
	input = 0;

	control_value = readl(mmio + HIBMC_POWER_MODE_CTRL);
	control_value &= ~(HIBMC_PW_MODE_CTL_MODE_MASK \|
	HIBMC_PW_MODE_CTL_OSC_INPUT_MASK);
	control_value \|= HIBMC_FIELD(HIBMC_PW_MODE_CTL_MODE, power_mode);
	control_value \|= HIBMC_FIELD(HIBMC_PW_MODE_CTL_OSC_INPUT, input);
	writel(control_value, mmio + HIBMC_POWER_MODE_CTRL);
	}

	void hibmc_set_current_gate(struct hibmc_drm_private *priv, unsigned int gate)
	{
	u32 gate_reg;
	u32 mode;
	void __iomem *mmio = priv->mmio;

	/* Get current power mode. */
	mode = (readl(mmio + HIBMC_POWER_MODE_CTRL) &
	HIBMC_PW_MODE_CTL_MODE_MASK) >> HIBMC_PW_MODE_CTL_MODE_SHIFT;

	switch (mode) {
	case HIBMC_PW_MODE_CTL_MODE_MODE0:
	gate_reg = HIBMC_MODE0_GATE;
	break;

	case HIBMC_PW_MODE_CTL_MODE_MODE1:
	gate_reg = HIBMC_MODE1_GATE;
	break;

	default:
	gate_reg = HIBMC_MODE0_GATE;
	break;
	}
	writel(gate, mmio + gate_reg);
	}

	static void hibmc_hw_config(struct hibmc_drm_private *priv)
	{
	u32 reg;

	/* On hardware reset, power mode 0 is default. */
	hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);

	/* Enable display power gate & LOCALMEM power gate*/
	reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
	reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
	reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
	reg \|= HIBMC_CURR_GATE_DISPLAY(1);
	reg \|= HIBMC_CURR_GATE_LOCALMEM(1);

	hibmc_set_current_gate(priv, reg);

	/*
	* Reset the memory controller. If the memory controller
	* is not reset in chip,the system might hang when sw accesses
	* the memory.The memory should be resetted after
	* changing the MXCLK.
	*/
	reg = readl(priv->mmio + HIBMC_MISC_CTRL);
	reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
	reg \|= HIBMC_MSCCTL_LOCALMEM_RESET(0);
	writel(reg, priv->mmio + HIBMC_MISC_CTRL);

	reg &= ~HIBMC_MSCCTL_LOCALMEM_RESET_MASK;
	reg \|= HIBMC_MSCCTL_LOCALMEM_RESET(1);

	writel(reg, priv->mmio + HIBMC_MISC_CTRL);
	}

	static int hibmc_hw_map(struct hibmc_drm_private *priv)
	{
	struct drm_device *dev = &priv->dev;
	struct pci_dev *pdev = to_pci_dev(dev->dev);
	resource_size_t addr, size, ioaddr, iosize;

	ioaddr = pci_resource_start(pdev, 1);
	iosize = pci_resource_len(pdev, 1);
	priv->mmio = devm_ioremap(dev->dev, ioaddr, iosize);
	if (!priv->mmio) {
	drm_err(dev, "Cannot map mmio region\n");
	return -ENOMEM;
	}

	addr = pci_resource_start(pdev, 0);
	size = pci_resource_len(pdev, 0);
	priv->fb_map = devm_ioremap(dev->dev, addr, size);
	if (!priv->fb_map) {
	drm_err(dev, "Cannot map framebuffer\n");
	return -ENOMEM;
	}
	priv->fb_base = addr;
	priv->fb_size = size;

	return 0;
	}

	static int hibmc_hw_init(struct hibmc_drm_private *priv)
	{
	int ret;

	ret = hibmc_hw_map(priv);
	if (ret)
	return ret;

	hibmc_hw_config(priv);

	return 0;
	}

	static int hibmc_unload(struct drm_device *dev)
	{
	struct pci_dev *pdev = to_pci_dev(dev->dev);

	drm_atomic_helper_shutdown(dev);

	free_irq(pdev->irq, dev);

	pci_disable_msi(to_pci_dev(dev->dev));

	return 0;
	}

	static int hibmc_load(struct drm_device *dev)
	{
	struct pci_dev *pdev = to_pci_dev(dev->dev);
	struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
	int ret;

	ret = hibmc_hw_init(priv);
	if (ret)
	goto err;

	ret = drmm_vram_helper_init(dev, pci_resource_start(pdev, 0), priv->fb_size);
	if (ret) {
	drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
	goto err;
	}

	ret = hibmc_kms_init(priv);
	if (ret)
	goto err;

	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
	if (ret) {
	drm_err(dev, "failed to initialize vblank: %d\n", ret);
	goto err;
	}

	ret = pci_enable_msi(pdev);
	if (ret) {
	drm_warn(dev, "enabling MSI failed: %d\n", ret);
	} else {
	/* PCI devices require shared interrupts. */
	ret = request_irq(pdev->irq, hibmc_interrupt, IRQF_SHARED,
	dev->driver->name, dev);
	if (ret)
	drm_warn(dev, "install irq failed: %d\n", ret);
	}

	/* reset all the states of crtc/plane/encoder/connector */
	drm_mode_config_reset(dev);

	return 0;

	err:
	hibmc_unload(dev);
	drm_err(dev, "failed to initialize drm driver: %d\n", ret);
	return ret;
	}

	static int hibmc_pci_probe(struct pci_dev *pdev,
	const struct pci_device_id *ent)
	{
	struct hibmc_drm_private *priv;
	struct drm_device *dev;
	int ret;

	ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &hibmc_driver);
	if (ret)
	return ret;

	priv = devm_drm_dev_alloc(&pdev->dev, &hibmc_driver,
	struct hibmc_drm_private, dev);
	if (IS_ERR(priv)) {
	DRM_ERROR("failed to allocate drm_device\n");
	return PTR_ERR(priv);
	}

	dev = &priv->dev;
	pci_set_drvdata(pdev, dev);

	ret = pcim_enable_device(pdev);
	if (ret) {
	drm_err(dev, "failed to enable pci device: %d\n", ret);
	goto err_return;
	}

	ret = hibmc_load(dev);
	if (ret) {
	drm_err(dev, "failed to load hibmc: %d\n", ret);
	goto err_return;
	}

	ret = drm_dev_register(dev, 0);
	if (ret) {
	drm_err(dev, "failed to register drv for userspace access: %d\n",
	ret);
	goto err_unload;
	}

	drm_fbdev_generic_setup(dev, dev->mode_config.preferred_depth);

	return 0;

	err_unload:
	hibmc_unload(dev);
	err_return:
	return ret;
	}

	static void hibmc_pci_remove(struct pci_dev *pdev)
	{
	struct drm_device *dev = pci_get_drvdata(pdev);

	drm_dev_unregister(dev);
	hibmc_unload(dev);
	}

	static const struct pci_device_id hibmc_pci_table[] = {
	{ PCI_VDEVICE(HUAWEI, 0x1711) },
	{0,}
	};

	static struct pci_driver hibmc_pci_driver = {
	.name = "hibmc-drm",
	.id_table = hibmc_pci_table,
	.probe = hibmc_pci_probe,
	.remove = hibmc_pci_remove,
	.driver.pm = &hibmc_pm_ops,
	};

	module_pci_driver(hibmc_pci_driver);

	MODULE_DEVICE_TABLE(pci, hibmc_pci_table);
	MODULE_AUTHOR("RongrongZou <zourongrong@huawei.com>");
	MODULE_DESCRIPTION("DRM Driver for Hisilicon Hibmc");
	MODULE_LICENSE("GPL v2");