[v2,03/10] drm/hisilicon: Add hisilicon DRM master driver

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 8773fad..038aae8 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -274,3 +274,5 @@  source "drivers/gpu/drm/amd/amdkfd/Kconfig"
 source "drivers/gpu/drm/imx/Kconfig"
 
 source "drivers/gpu/drm/vc4/Kconfig"
+
+source "drivers/gpu/drm/hisilicon/Kconfig"
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 1e9ff4c..e7efcb7 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -75,3 +75,4 @@  obj-y			+= i2c/
 obj-y			+= panel/
 obj-y			+= bridge/
 obj-$(CONFIG_DRM_FSL_DCU) += fsl-dcu/
+obj-$(CONFIG_DRM_HISI) += hisilicon/
diff --git a/drivers/gpu/drm/hisilicon/Kconfig b/drivers/gpu/drm/hisilicon/Kconfig
new file mode 100644
index 0000000..70aa8d1
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/Kconfig
@@ -0,0 +1,9 @@ 
+config DRM_HISI
+	tristate "DRM Support for Hisilicon SoCs Platform"
+	depends on DRM
+	select DRM_KMS_HELPER
+	select DRM_GEM_CMA_HELPER
+	select DRM_KMS_CMA_HELPER
+	help
+	  Choose this option if you have a hisilicon chipsets(hi6220).
+	  If M is selected the module will be called hisi-drm.
diff --git a/drivers/gpu/drm/hisilicon/Makefile b/drivers/gpu/drm/hisilicon/Makefile
new file mode 100644
index 0000000..7375456
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/Makefile
@@ -0,0 +1,3 @@ 
+hisi-drm-y := hisi_drm_drv.o 
+
+obj-$(CONFIG_DRM_HISI)	+= hisi-drm.o
diff --git a/drivers/gpu/drm/hisilicon/hisi_drm_drv.c b/drivers/gpu/drm/hisilicon/hisi_drm_drv.c
new file mode 100644
index 0000000..445e2ec
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hisi_drm_drv.c
@@ -0,0 +1,214 @@ 
+/*
+ * Hisilicon SoCs drm master driver
+ *
+ * Copyright (c) 2014-2015 Hisilicon Limited.
+ * Author:
+ *	Xinliang Liu <xinliang.liu@linaro.org>
+ *	Xinliang Liu <z.liuxinliang@hisilicon.com>
+ *	Xinwei Kong <kong.kongxinwei@hisilicon.com>
+ *
+ * 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/of_platform.h>
+#include <linux/component.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_atomic_helper.h>
+
+#define DRIVER_NAME	"hisi-drm"
+
+static int hisi_drm_unload(struct drm_device *dev)
+{
+	drm_mode_config_cleanup(dev);
+	return 0;
+}
+
+static const struct drm_mode_config_funcs hisi_drm_mode_config_funcs = {
+	.fb_create = drm_fb_cma_create,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+static void hisi_drm_mode_config_init(struct drm_device *dev)
+{
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+
+	dev->mode_config.max_width = 2048;
+	dev->mode_config.max_height = 2048;
+
+	dev->mode_config.funcs = &hisi_drm_mode_config_funcs;
+}
+
+static int hisi_drm_load(struct drm_device *dev, unsigned long flags)
+{
+	int ret;
+
+	dev_set_drvdata(dev->dev, dev);
+
+	/* dev->mode_config initialization */
+	drm_mode_config_init(dev);
+	hisi_drm_mode_config_init(dev);
+
+	/* bind and init sub drivers */
+	ret = component_bind_all(dev->dev, dev);
+	if (ret) {
+		DRM_ERROR("failed to bind all component.\n");
+		goto err_mode_config_cleanup;
+	}
+
+	/* reset all the states of crtc/plane/encoder/connector */
+	drm_mode_config_reset(dev);
+
+	return 0;
+
+err_mode_config_cleanup:
+	drm_mode_config_cleanup(dev);
+
+	return ret;
+}
+
+static const struct file_operations hisi_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		= no_llseek,
+	.mmap		= drm_gem_cma_mmap,
+};
+
+static struct dma_buf *hisi_gem_prime_export(struct drm_device *dev,
+					     struct drm_gem_object *obj,
+					     int flags)
+{
+	/* we want to be able to write in mmapped buffer */
+	flags |= O_RDWR;
+	return drm_gem_prime_export(dev, obj, flags);
+}
+
+static int hisi_gem_cma_dumb_create(struct drm_file *file,
+				    struct drm_device *dev,
+				    struct drm_mode_create_dumb *args)
+{
+	int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
+
+	/* mali gpu need pitch 8 bytes alignment for 32bpp */
+	args->pitch = roundup(min_pitch, 8);
+
+	return drm_gem_cma_dumb_create_internal(file, dev, args);
+}
+
+static struct drm_driver hisi_drm_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
+				  DRIVER_ATOMIC,
+	.load			= hisi_drm_load,
+	.unload                 = hisi_drm_unload,
+	.fops			= &hisi_drm_fops,
+	.set_busid		= drm_platform_set_busid,
+
+	.gem_free_object	= drm_gem_cma_free_object,
+	.gem_vm_ops		= &drm_gem_cma_vm_ops,
+	.dumb_create		= hisi_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	= hisi_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,
+
+	.name			= "hisi",
+	.desc			= "Hisilicon SoCs' DRM Driver",
+	.date			= "20150718",
+	.major			= 1,
+	.minor			= 0,
+};
+
+static int compare_of(struct device *dev, void *data)
+{
+	return dev->of_node == data;
+}
+
+static int hisi_drm_bind(struct device *dev)
+{
+	dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+	return drm_platform_init(&hisi_drm_driver, to_platform_device(dev));
+}
+
+static void hisi_drm_unbind(struct device *dev)
+{
+	drm_put_dev(dev_get_drvdata(dev));
+}
+
+static const struct component_master_ops hisi_drm_ops = {
+	.bind = hisi_drm_bind,
+	.unbind = hisi_drm_unbind,
+};
+
+static int hisi_drm_platform_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *node = dev->of_node;
+	struct device_node *child_np;
+	struct component_match *match = NULL;
+
+	of_platform_populate(node, NULL, NULL, dev);
+
+	child_np = of_get_next_available_child(node, NULL);
+	while (child_np) {
+		component_match_add(dev, &match, compare_of, child_np);
+		of_node_put(child_np);
+		child_np = of_get_next_available_child(node, child_np);
+	}
+
+	return component_master_add_with_match(dev, &hisi_drm_ops, match);
+
+	return 0;
+}
+
+static int hisi_drm_platform_remove(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &hisi_drm_ops);
+	of_platform_depopulate(&pdev->dev);
+	return 0;
+}
+
+static const struct of_device_id hisi_drm_dt_ids[] = {
+	{ .compatible = "hisilicon,hi6220-dss", },
+	{ /* end node */ },
+};
+MODULE_DEVICE_TABLE(of, hisi_drm_dt_ids);
+
+static struct platform_driver hisi_drm_platform_driver = {
+	.probe = hisi_drm_platform_probe,
+	.remove = hisi_drm_platform_remove,
+	.driver = {
+		.owner = THIS_MODULE,
+		.name = DRIVER_NAME,
+		.of_match_table = hisi_drm_dt_ids,
+	},
+};
+
+module_platform_driver(hisi_drm_platform_driver);
+
+MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
+MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
+MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
+MODULE_DESCRIPTION("hisilicon SoCs' DRM master driver");
+MODULE_LICENSE("GPL v2");