drm: zte: add initial vou drm driver (0a886f59) · Commits · e / devices / android_kernel_teracube_emerald

drivers/gpu/drm/Kconfig

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		@@ -223,6 +223,8 @@ source "drivers/gpu/drm/hisilicon/Kconfig"

		source "drivers/gpu/drm/mediatek/Kconfig"

		source "drivers/gpu/drm/zte/Kconfig"

		# Keep legacy drivers last

		menuconfig DRM_LEGACY

drivers/gpu/drm/Makefile

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		@@ -86,3 +86,4 @@ obj-$(CONFIG_DRM_FSL_DCU) += fsl-dcu/
		obj-$(CONFIG_DRM_ETNAVIV) += etnaviv/
		obj-$(CONFIG_DRM_ARCPGU)+= arc/
		obj-y += hisilicon/
		obj-$(CONFIG_DRM_ZTE) += zte/

drivers/gpu/drm/zte/Kconfig

0 → 100644

+8 −0

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		config DRM_ZTE
		tristate "DRM Support for ZTE SoCs"
		depends on DRM && ARCH_ZX
		select DRM_KMS_CMA_HELPER
		select DRM_KMS_FB_HELPER
		select DRM_KMS_HELPER
		help
		Choose this option to enable DRM on ZTE ZX SoCs.

drivers/gpu/drm/zte/Makefile

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		zxdrm-y := \
		zx_drm_drv.o \
		zx_hdmi.o \
		zx_plane.o \
		zx_vou.o

		obj-$(CONFIG_DRM_ZTE) += zxdrm.o

drivers/gpu/drm/zte/zx_drm_drv.c

0 → 100644

+267 −0

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		/*
		* Copyright 2016 Linaro Ltd.
		* Copyright 2016 ZTE Corporation.
		*
		* 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 Foundation.
		*
		*/

		#include <linux/clk.h>
		#include <linux/component.h>
		#include <linux/list.h>
		#include <linux/module.h>
		#include <linux/of_graph.h>
		#include <linux/of_platform.h>
		#include <linux/spinlock.h>

		#include <drm/drm_atomic_helper.h>
		#include <drm/drm_crtc.h>
		#include <drm/drm_crtc_helper.h>
		#include <drm/drm_fb_cma_helper.h>
		#include <drm/drm_fb_helper.h>
		#include <drm/drm_gem_cma_helper.h>
		#include <drm/drm_of.h>
		#include <drm/drmP.h>

		#include "zx_drm_drv.h"
		#include "zx_vou.h"

		struct zx_drm_private {
		struct drm_fbdev_cma *fbdev;
		};

		static void zx_drm_fb_output_poll_changed(struct drm_device *drm)
		{
		struct zx_drm_private *priv = drm->dev_private;

		drm_fbdev_cma_hotplug_event(priv->fbdev);
		}

		static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
		.fb_create = drm_fb_cma_create,
		.output_poll_changed = zx_drm_fb_output_poll_changed,
		.atomic_check = drm_atomic_helper_check,
		.atomic_commit = drm_atomic_helper_commit,
		};

		static void zx_drm_lastclose(struct drm_device *drm)
		{
		struct zx_drm_private *priv = drm->dev_private;

		drm_fbdev_cma_restore_mode(priv->fbdev);
		}

		static const struct file_operations zx_drm_fops = {
		.owner = THIS_MODULE,
		.open = drm_open,
		.release = drm_release,
		.unlocked_ioctl = drm_ioctl,
		#ifdef CONFIG_COMPAT
		.compat_ioctl = drm_compat_ioctl,
		#endif
		.poll = drm_poll,
		.read = drm_read,
		.llseek = noop_llseek,
		.mmap = drm_gem_cma_mmap,
		};

		static struct drm_driver zx_drm_driver = {
		.driver_features = DRIVER_GEM \| DRIVER_MODESET \| DRIVER_PRIME \|
		DRIVER_ATOMIC,
		.lastclose = zx_drm_lastclose,
		.get_vblank_counter = drm_vblank_no_hw_counter,
		.enable_vblank = zx_vou_enable_vblank,
		.disable_vblank = zx_vou_disable_vblank,
		.gem_free_object = drm_gem_cma_free_object,
		.gem_vm_ops = &drm_gem_cma_vm_ops,
		.dumb_create = drm_gem_cma_dumb_create,
		.dumb_map_offset = drm_gem_cma_dumb_map_offset,
		.dumb_destroy = drm_gem_dumb_destroy,
		.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
		.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
		.gem_prime_export = drm_gem_prime_export,
		.gem_prime_import = drm_gem_prime_import,
		.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
		.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
		.gem_prime_vmap = drm_gem_cma_prime_vmap,
		.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
		.gem_prime_mmap = drm_gem_cma_prime_mmap,
		.fops = &zx_drm_fops,
		.name = "zx-vou",
		.desc = "ZTE VOU Controller DRM",
		.date = "20160811",
		.major = 1,
		.minor = 0,
		};

		static int zx_drm_bind(struct device *dev)
		{
		struct drm_device *drm;
		struct zx_drm_private *priv;
		int ret;

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

		drm = drm_dev_alloc(&zx_drm_driver, dev);
		if (!drm)
		return -ENOMEM;

		drm->dev_private = priv;
		dev_set_drvdata(dev, drm);

		drm_mode_config_init(drm);
		drm->mode_config.min_width = 16;
		drm->mode_config.min_height = 16;
		drm->mode_config.max_width = 4096;
		drm->mode_config.max_height = 4096;
		drm->mode_config.funcs = &zx_drm_mode_config_funcs;

		ret = component_bind_all(dev, drm);
		if (ret) {
		DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
		goto out_unregister;
		}

		ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
		if (ret < 0) {
		DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
		goto out_unbind;
		}

		/*
		* We will manage irq handler on our own. In this case, irq_enabled
		* need to be true for using vblank core support.
		*/
		drm->irq_enabled = true;

		drm_mode_config_reset(drm);
		drm_kms_helper_poll_init(drm);

		priv->fbdev = drm_fbdev_cma_init(drm, 32, drm->mode_config.num_crtc,
		drm->mode_config.num_connector);
		if (IS_ERR(priv->fbdev)) {
		ret = PTR_ERR(priv->fbdev);
		DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret);
		priv->fbdev = NULL;
		goto out_poll_fini;
		}

		ret = drm_dev_register(drm, 0);
		if (ret)
		goto out_fbdev_fini;

		return 0;

		out_fbdev_fini:
		if (priv->fbdev) {
		drm_fbdev_cma_fini(priv->fbdev);
		priv->fbdev = NULL;
		}
		out_poll_fini:
		drm_kms_helper_poll_fini(drm);
		drm_mode_config_cleanup(drm);
		drm_vblank_cleanup(drm);
		out_unbind:
		component_unbind_all(dev, drm);
		out_unregister:
		dev_set_drvdata(dev, NULL);
		drm->dev_private = NULL;
		drm_dev_unref(drm);
		return ret;
		}

		static void zx_drm_unbind(struct device *dev)
		{
		struct drm_device *drm = dev_get_drvdata(dev);
		struct zx_drm_private *priv = drm->dev_private;

		drm_dev_unregister(drm);
		if (priv->fbdev) {
		drm_fbdev_cma_fini(priv->fbdev);
		priv->fbdev = NULL;
		}
		drm_kms_helper_poll_fini(drm);
		drm_mode_config_cleanup(drm);
		drm_vblank_cleanup(drm);
		component_unbind_all(dev, drm);
		dev_set_drvdata(dev, NULL);
		drm->dev_private = NULL;
		drm_dev_unref(drm);
		}

		static const struct component_master_ops zx_drm_master_ops = {
		.bind = zx_drm_bind,
		.unbind = zx_drm_unbind,
		};

		static int compare_of(struct device dev, void data)
		{
		return dev->of_node == data;
		}

		static int zx_drm_probe(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		struct device_node *parent = dev->of_node;
		struct device_node *child;
		struct component_match *match = NULL;
		int ret;

		ret = of_platform_populate(parent, NULL, NULL, dev);
		if (ret)
		return ret;

		for_each_available_child_of_node(parent, child) {
		component_match_add(dev, &match, compare_of, child);
		of_node_put(child);
		}

		return component_master_add_with_match(dev, &zx_drm_master_ops, match);
		}

		static int zx_drm_remove(struct platform_device *pdev)
		{
		component_master_del(&pdev->dev, &zx_drm_master_ops);
		return 0;
		}

		static const struct of_device_id zx_drm_of_match[] = {
		{ .compatible = "zte,zx296718-vou", },
		{ /* end */ },
		};
		MODULE_DEVICE_TABLE(of, zx_drm_of_match);

		static struct platform_driver zx_drm_platform_driver = {
		.probe = zx_drm_probe,
		.remove = zx_drm_remove,
		.driver = {
		.name = "zx-drm",
		.of_match_table = zx_drm_of_match,
		},
		};

		static struct platform_driver *drivers[] = {
		&zx_crtc_driver,
		&zx_hdmi_driver,
		&zx_drm_platform_driver,
		};

		static int zx_drm_init(void)
		{
		return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
		}
		module_init(zx_drm_init);

		static void zx_drm_exit(void)
		{
		platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
		}
		module_exit(zx_drm_exit);

		MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
		MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
		MODULE_LICENSE("GPL v2");