Hi

I only have a number of trivial changes listed below. With these fixed:

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

Am 17.05.21 um 13:59 schrieb Deepak Rawat:
> DRM driver for hyperv synthetic video device, based on hyperv_fb
> framebuffer driver. Also added config option "DRM_HYPERV" to enabled
> this driver.
> 
> v2:
> - Add support for gen2 VM
> - Fixed review comments
> 
> v3:
> - Split into multiple files as suggested by Thomas Zimmermann
> - Fixed hibernation issue as suggested by Dexuan Cui
> - Use ioremap_cache as suggested by Dexuan Cui
> - Incorporated other review comments
> 
> v4:
> - Fix bitrotted code
> - Review comments
> - Updated the copyright and license to match hyperv_fb
> 
> Signed-off-by: Deepak Rawat <drawat.floss@gmail.com>
> ---
>   drivers/gpu/drm/Kconfig                     |  12 +
>   drivers/gpu/drm/Makefile                    |   1 +
>   drivers/gpu/drm/hyperv/Makefile             |   8 +
>   drivers/gpu/drm/hyperv/hyperv_drm.h         |  51 +++
>   drivers/gpu/drm/hyperv/hyperv_drm_drv.c     | 310 +++++++++++++
>   drivers/gpu/drm/hyperv/hyperv_drm_modeset.c | 238 ++++++++++
>   drivers/gpu/drm/hyperv/hyperv_drm_proto.c   | 478 ++++++++++++++++++++
>   7 files changed, 1098 insertions(+)
>   create mode 100644 drivers/gpu/drm/hyperv/Makefile
>   create mode 100644 drivers/gpu/drm/hyperv/hyperv_drm.h
>   create mode 100644 drivers/gpu/drm/hyperv/hyperv_drm_drv.c
>   create mode 100644 drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
>   create mode 100644 drivers/gpu/drm/hyperv/hyperv_drm_proto.c
> 
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index 3c16bd1afd87..15bb0165ebf9 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -386,6 +386,18 @@ source "drivers/gpu/drm/xlnx/Kconfig"
>   
>   source "drivers/gpu/drm/gud/Kconfig"
>   
> +config DRM_HYPERV
> +	tristate "DRM Support for hyperv synthetic video device"
> +	depends on DRM && PCI && MMU && HYPERV
> +	select DRM_KMS_HELPER
> +	select DRM_GEM_SHMEM_HELPER
> +	help
> +	 This is a KMS driver for hyperv synthetic video device. Choose this
> +	 option if you would like to enable drm driver for Hyper-V virtual
> +	 machine.
> +
> +	 If M is selected the module will be called hyperv_drm.
> +
>   # Keep legacy drivers last
>   
>   menuconfig DRM_LEGACY
> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> index 5279db4392df..d0ae4feaae33 100644
> --- a/drivers/gpu/drm/Makefile
> +++ b/drivers/gpu/drm/Makefile
> @@ -126,3 +126,4 @@ obj-$(CONFIG_DRM_MCDE) += mcde/
>   obj-$(CONFIG_DRM_TIDSS) += tidss/
>   obj-y			+= xlnx/
>   obj-y			+= gud/
> +obj-$(CONFIG_DRM_HYPERV) += hyperv/
> diff --git a/drivers/gpu/drm/hyperv/Makefile b/drivers/gpu/drm/hyperv/Makefile
> new file mode 100644
> index 000000000000..0039b03db0be
> --- /dev/null
> +++ b/drivers/gpu/drm/hyperv/Makefile
> @@ -0,0 +1,8 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +
> +hyperv_drm-y := \
> +	hyperv_drm_proto.o \
> +	hyperv_drm_modeset.o \
> +	hyperv_drm_drv.o

Alphabetical sorting prefered.

> +
> +obj-$(CONFIG_DRM_HYPERV) += hyperv_drm.o
> diff --git a/drivers/gpu/drm/hyperv/hyperv_drm.h b/drivers/gpu/drm/hyperv/hyperv_drm.h
> new file mode 100644
> index 000000000000..e1d1fdea96f2
> --- /dev/null
> +++ b/drivers/gpu/drm/hyperv/hyperv_drm.h
> @@ -0,0 +1,51 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright 2021 Microsoft
> + */
> +
> +#ifndef _HYPERV_DRM_H_
> +#define _HYPERV_DRM_H_
> +
> +#define VMBUS_MAX_PACKET_SIZE 0x4000
> +
> +struct hyperv_drm_device {
> +	/* drm */
> +	struct drm_device dev;
> +	struct drm_simple_display_pipe pipe;
> +	struct drm_connector connector;
> +
> +	/* mode */
> +	u32 screen_width_max;
> +	u32 screen_height_max;
> +	u32 preferred_width;
> +	u32 preferred_height;
> +	u32 screen_depth;
> +
> +	/* hw */
> +	struct resource *mem;
> +	void __iomem *vram;
> +	unsigned long fb_base;
> +	unsigned long fb_size;
> +	struct completion wait;
> +	u32 synthvid_version;
> +	u32 mmio_megabytes;
> +
> +	u8 init_buf[VMBUS_MAX_PACKET_SIZE];
> +	u8 recv_buf[VMBUS_MAX_PACKET_SIZE];
> +
> +	struct hv_device *hdev;
> +};
> +
> +#define to_hv(_dev) container_of(_dev, struct hyperv_drm_device, dev)
> +
> +/* hyperv_drm_modeset */
> +int hyperv_mode_config_init(struct hyperv_drm_device *hv);
> +
> +/* hyperv_drm_proto */
> +int hyperv_update_vram_location(struct hv_device *hdev, phys_addr_t vram_pp);
> +int hyperv_update_situation(struct hv_device *hdev, u8 active, u32 bpp,
> +			    u32 w, u32 h, u32 pitch);
> +int hyperv_update_dirt(struct hv_device *hdev, struct drm_rect *rect);
> +int hyperv_connect_vsp(struct hv_device *hdev);
> +
> +#endif
> diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_drv.c b/drivers/gpu/drm/hyperv/hyperv_drm_drv.c
> new file mode 100644
> index 000000000000..68a6ba91a486
> --- /dev/null
> +++ b/drivers/gpu/drm/hyperv/hyperv_drm_drv.c
> @@ -0,0 +1,310 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright 2021 Microsoft
> + */
> +
> +#include <linux/efi.h>
> +#include <linux/hyperv.h>
> +#include <linux/module.h>
> +#include <linux/pci.h>
> +
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_drv.h>
> +#include <drm/drm_fb_helper.h>
> +#include <drm/drm_gem_shmem_helper.h>
> +#include <drm/drm_simple_kms_helper.h>
> +
> +#include "hyperv_drm.h"
> +
> +#define DRIVER_NAME "hyperv_drm"
> +#define DRIVER_DESC "DRM driver for hyperv synthetic video device"
> +#define DRIVER_DATE "2020"
> +#define DRIVER_MAJOR 1
> +#define DRIVER_MINOR 0
> +
> +#define PCI_VENDOR_ID_MICROSOFT 0x1414
> +#define PCI_DEVICE_ID_HYPERV_VIDEO 0x5353
> +
> +DEFINE_DRM_GEM_FOPS(hv_fops);
> +
> +static struct drm_driver hyperv_driver = {
> +	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
> +
> +	.name		 = DRIVER_NAME,
> +	.desc		 = DRIVER_DESC,
> +	.date		 = DRIVER_DATE,
> +	.major		 = DRIVER_MAJOR,
> +	.minor		 = DRIVER_MINOR,
> +
> +	.fops		 = &hv_fops,
> +	DRM_GEM_SHMEM_DRIVER_OPS,
> +};
> +
> +static int hyperv_pci_probe(struct pci_dev *pdev,
> +			    const struct pci_device_id *ent)
> +{
> +	return 0;
> +}
> +
> +static void hyperv_pci_remove(struct pci_dev *pdev)
> +{
> +}
> +
> +static const struct pci_device_id hyperv_pci_tbl[] = {
> +	{
> +		.vendor = PCI_VENDOR_ID_MICROSOFT,
> +		.device = PCI_DEVICE_ID_HYPERV_VIDEO,
> +	},
> +	{ /* end of list */ }
> +};
> +
> +static struct pci_driver hyperv_pci_driver = {
> +	.name =		KBUILD_MODNAME,
> +	.id_table =	hyperv_pci_tbl,
> +	.probe =	hyperv_pci_probe,
> +	.remove =	hyperv_pci_remove,
> +};

The PCI code doesn't do anything. Do you need this for gen1 to work 
corretly. If so, there should at least be a short comment. Why don't you 
call hyperv_setup_gen1() in the PCI probe function?

> +
> +static int hyperv_setup_gen1(struct hyperv_drm_device *hv)
> +{
> +	struct drm_device *dev = &hv->dev;
> +	struct pci_dev *pdev;
> +	int ret;
> +
> +	pdev = pci_get_device(PCI_VENDOR_ID_MICROSOFT,
> +			      PCI_DEVICE_ID_HYPERV_VIDEO, NULL);
> +	if (!pdev) {
> +		drm_err(dev, "Unable to find PCI Hyper-V video\n");
> +		return -ENODEV;
> +	}
> +
> +	ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "hypervdrmfb");

This function is no more. There's now 
drm_aperture_remove_conflicting_pci_framebuffers() from 
drm/drm_aperture.h Works the same way.

You probably need to rebase onto the latest drm-misc-next or drm-tip tree.

> +	if (ret) {
> +		drm_err(dev, "Not able to remove boot fb\n");
> +		return ret;
> +	}
> +
> +	if (pci_request_region(pdev, 0, DRIVER_NAME) != 0)
> +		drm_warn(dev, "Cannot request framebuffer, boot fb still active?\n");
> +
> +	if ((pdev->resource[0].flags & IORESOURCE_MEM) == 0) {
> +		drm_err(dev, "Resource at bar 0 is not IORESOURCE_MEM\n");
> +		ret = -ENODEV;
> +		goto error;
> +	}
> +
> +	hv->fb_base = pci_resource_start(pdev, 0);
> +	hv->fb_size = pci_resource_len(pdev, 0);
> +	if (!hv->fb_base) {
> +		drm_err(dev, "Resource not available\n");
> +		ret = -ENODEV;
> +		goto error;
> +	}
> +
> +	hv->fb_size = min(hv->fb_size,
> +			  (unsigned long)(hv->mmio_megabytes * 1024 * 1024));
> +	hv->vram = devm_ioremap(&pdev->dev, hv->fb_base, hv->fb_size);
> +	if (!hv->vram) {
> +		drm_err(dev, "Failed to map vram\n");
> +		ret = -ENOMEM;
> +	}
> +
> +error:
> +	pci_dev_put(pdev);
> +	return ret;
> +}
> +
> +static int hyperv_setup_gen2(struct hyperv_drm_device *hv,
> +			     struct hv_device *hdev)
> +{
> +	struct drm_device *dev = &hv->dev;
> +	struct apertures_struct *ap;
> +	int ret;
> +
> +	ap = alloc_apertures(1);
> +	if (!ap) {
> +		drm_err(dev, "Failed to get apertures\n");
> +		return -ENOMEM;
> +	}
> +
> +	ap->ranges[0].base = screen_info.lfb_base;
> +	ap->ranges[0].size = screen_info.lfb_size;
> +	drm_fb_helper_remove_conflicting_framebuffers(ap, KBUILD_MODNAME, false);

For this function, there's now 
drm_aperture_remove_conflicting_framebuffers().

> +	kfree(ap);
> +
> +	hv->fb_size = (unsigned long)hv->mmio_megabytes * 1024 * 1024;
> +
> +	ret = vmbus_allocate_mmio(&hv->mem, hdev, 0, -1, hv->fb_size, 0x100000,
> +				  true);
> +	if (ret) {
> +		drm_err(dev, "Failed to allocate mmio\n");
> +		return -ENOMEM;
> +	}
> +
> +	/*
> +	 * Map the VRAM cacheable for performance. This is also required for VM
> +	 * connect to display properly for ARM64 Linux VM, as the host also maps
> +	 * the VRAM cacheable.
> +	 */
> +	hv->vram = ioremap_cache(hv->mem->start, hv->fb_size);
> +	if (!hv->vram) {
> +		drm_err(dev, "Failed to map vram\n");
> +		ret = -ENOMEM;
> +		goto error;
> +	}
> +
> +	hv->fb_base = hv->mem->start;
> +	return 0;
> +
> +error:
> +	vmbus_free_mmio(hv->mem->start, hv->fb_size);
> +	return ret;
> +}
> +
> +static int hyperv_vmbus_probe(struct hv_device *hdev,
> +			      const struct hv_vmbus_device_id *dev_id)
> +{
> +	struct hyperv_drm_device *hv;
> +	struct drm_device *dev;
> +	int ret;
> +
> +	hv = devm_drm_dev_alloc(&hdev->device, &hyperv_driver,
> +				struct hyperv_drm_device, dev);
> +	if (IS_ERR(hv))
> +		return PTR_ERR(hv);
> +
> +	dev = &hv->dev;
> +	init_completion(&hv->wait);
> +	hv_set_drvdata(hdev, hv);
> +	hv->hdev = hdev;
> +
> +	ret = hyperv_connect_vsp(hdev);
> +	if (ret) {
> +		drm_err(dev, "Failed to connect to vmbus.\n");
> +		goto err_hv_set_drv_data;
> +	}
> +
> +	if (efi_enabled(EFI_BOOT))
> +		ret = hyperv_setup_gen2(hv, hdev);
> +	else
> +		ret = hyperv_setup_gen1(hv);
> +
> +	if (ret)
> +		goto err_vmbus_close;
> +
> +	/*
> +	 * Should be done only once during init and resume. Failing to update
> +	 * vram location is not fatal. Device will update dirty area till
> +	 * preferred resolution only.
> +	 */
> +	ret = hyperv_update_vram_location(hdev, hv->fb_base);
> +	if (ret)
> +		drm_warn(dev, "Failed to update vram location.\n");
> +
> +	ret = hyperv_mode_config_init(hv);
> +	if (ret)
> +		goto err_vmbus_close;
> +
> +	ret = drm_dev_register(dev, 0);
> +	if (ret) {
> +		drm_err(dev, "Failed to register drm driver.\n");
> +		goto err_vmbus_close;
> +	}
> +
> +	drm_fbdev_generic_setup(dev, 0);
> +
> +	return 0;
> +
> +err_vmbus_close:
> +	vmbus_close(hdev->channel);
> +err_hv_set_drv_data:
> +	hv_set_drvdata(hdev, NULL);
> +	return ret;
> +}
> +
> +static int hyperv_vmbus_remove(struct hv_device *hdev)
> +{
> +	struct drm_device *dev = hv_get_drvdata(hdev);
> +	struct hyperv_drm_device *hv = to_hv(dev);
> +
> +	drm_dev_unplug(dev);
> +	drm_atomic_helper_shutdown(dev);
> +	vmbus_close(hdev->channel);
> +	hv_set_drvdata(hdev, NULL);
> +	vmbus_free_mmio(hv->mem->start, hv->fb_size);
> +
> +	return 0;
> +}
> +
> +static int hyperv_vmbus_suspend(struct hv_device *hdev)
> +{
> +	struct drm_device *dev = hv_get_drvdata(hdev);
> +	int ret;
> +
> +	ret = drm_mode_config_helper_suspend(dev);
> +
> +	vmbus_close(hdev->channel);
> +
> +	return ret;
> +}
> +
> +static int hyperv_vmbus_resume(struct hv_device *hdev)
> +{
> +	struct drm_device *dev = hv_get_drvdata(hdev);
> +	struct hyperv_drm_device *hv = to_hv(dev);
> +	int ret;
> +
> +	ret = hyperv_connect_vsp(hdev);
> +	if (ret)
> +		return ret;
> +
> +	ret = hyperv_update_vram_location(hdev, hv->fb_base);
> +	if (ret)
> +		return ret;
> +
> +	return drm_mode_config_helper_resume(dev);
> +}
> +
> +static const struct hv_vmbus_device_id hyperv_vmbus_tbl[] = {
> +	/* Synthetic Video Device GUID */
> +	{HV_SYNTHVID_GUID},
> +	{}
> +};
> +
> +static struct hv_driver hyperv_hv_driver = {
> +	.name = KBUILD_MODNAME,
> +	.id_table = hyperv_vmbus_tbl,
> +	.probe = hyperv_vmbus_probe,
> +	.remove = hyperv_vmbus_remove,
> +	.suspend = hyperv_vmbus_suspend,
> +	.resume = hyperv_vmbus_resume,
> +	.driver = {
> +		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
> +	},
> +};
> +
> +static int __init hyperv_init(void)
> +{
> +	int ret;
> +
> +	ret = pci_register_driver(&hyperv_pci_driver);
> +	if (ret != 0)
> +		return ret;
> +
> +	return vmbus_driver_register(&hyperv_hv_driver);
> +}
> +
> +static void __exit hyperv_exit(void)
> +{
> +	vmbus_driver_unregister(&hyperv_hv_driver);
> +	pci_unregister_driver(&hyperv_pci_driver);
> +}
> +
> +module_init(hyperv_init);
> +module_exit(hyperv_exit);
> +
> +MODULE_DEVICE_TABLE(pci, hyperv_pci_tbl);
> +MODULE_DEVICE_TABLE(vmbus, hyperv_vmbus_tbl);
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR("Deepak Rawat <drawat.floss@gmail.com>");
> +MODULE_DESCRIPTION("DRM driver for hyperv synthetic video device");
> diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c b/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
> new file mode 100644
> index 000000000000..5d608472d294
> --- /dev/null
> +++ b/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
> @@ -0,0 +1,238 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright 2021 Microsoft
> + */
> +
> +#include <linux/hyperv.h>
> +
> +#include <drm/drm_damage_helper.h>
> +#include <drm/drm_drv.h>
> +#include <drm/drm_fb_helper.h>
> +#include <drm/drm_format_helper.h>
> +#include <drm/drm_fourcc.h>
> +#include <drm/drm_gem_atomic_helper.h>
> +#include <drm/drm_gem_framebuffer_helper.h>
> +#include <drm/drm_gem_shmem_helper.h>
> +#include <drm/drm_probe_helper.h>
> +#include <drm/drm_simple_kms_helper.h>
> +
> +#include "hyperv_drm.h"
> +
> +static int hyperv_blit_to_vram_rect(struct drm_framebuffer *fb,
> +				    const struct dma_buf_map *map,
> +				    struct drm_rect *rect)
> +{
> +	struct hyperv_drm_device *hv = to_hv(fb->dev);
> +	void *vmap = map->vaddr; /* TODO: Use mapping abstraction properly */
> +	int idx;
> +
> +	if (!drm_dev_enter(&hv->dev, &idx))
> +		return -ENODEV;
> +
> +	drm_fb_memcpy_dstclip(hv->vram, vmap, fb, rect);
> +	drm_dev_exit(idx);
> +
> +	return 0;
> +}
> +
> +static int hyperv_blit_to_vram_fullscreen(struct drm_framebuffer *fb, const struct dma_buf_map *map)
> +{
> +	struct drm_rect fullscreen = {
> +		.x1 = 0,
> +		.x2 = fb->width,
> +		.y1 = 0,
> +		.y2 = fb->height,
> +	};
> +	return hyperv_blit_to_vram_rect(fb, map, &fullscreen);
> +}
> +
> +static int hyperv_connector_get_modes(struct drm_connector *connector)
> +{
> +	struct hyperv_drm_device *hv = to_hv(connector->dev);
> +	int count;
> +
> +	count = drm_add_modes_noedid(connector,
> +				     connector->dev->mode_config.max_width,
> +				     connector->dev->mode_config.max_height);
> +	drm_set_preferred_mode(connector, hv->preferred_width,
> +			       hv->preferred_height);
> +
> +	return count;
> +}
> +
> +static const struct drm_connector_helper_funcs hyperv_connector_helper_funcs = {
> +	.get_modes = hyperv_connector_get_modes,
> +};
> +
> +static const struct drm_connector_funcs hyperv_connector_funcs = {
> +	.fill_modes = drm_helper_probe_single_connector_modes,
> +	.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 inline int hyperv_conn_init(struct hyperv_drm_device *hv)
> +{
> +	drm_connector_helper_add(&hv->connector, &hyperv_connector_helper_funcs);
> +	return drm_connector_init(&hv->dev, &hv->connector,
> +				  &hyperv_connector_funcs,
> +				  DRM_MODE_CONNECTOR_VIRTUAL);
> +}
> +
> +static int hyperv_check_size(struct hyperv_drm_device *hv, int w, int h,
> +			     struct drm_framebuffer *fb)
> +{
> +	u32 pitch = w * (hv->screen_depth / 8);
> +
> +	if (fb)
> +		pitch = fb->pitches[0];
> +
> +	if (pitch * h > hv->fb_size)
> +		return -EINVAL;
> +
> +	return 0;
> +}
> +
> +static void hyperv_pipe_enable(struct drm_simple_display_pipe *pipe,
> +			       struct drm_crtc_state *crtc_state,
> +			       struct drm_plane_state *plane_state)
> +{
> +	struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
> +	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
> +
> +	hyperv_update_situation(hv->hdev, 1,  hv->screen_depth,
> +				crtc_state->mode.hdisplay,
> +				crtc_state->mode.vdisplay,
> +				plane_state->fb->pitches[0]);
> +	hyperv_blit_to_vram_fullscreen(plane_state->fb, &shadow_plane_state->map[0]);
> +}
> +
> +static int hyperv_pipe_check(struct drm_simple_display_pipe *pipe,
> +			     struct drm_plane_state *plane_state,
> +			     struct drm_crtc_state *crtc_state)
> +{
> +	struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
> +	struct drm_framebuffer *fb = plane_state->fb;
> +
> +	if (fb->format->format != DRM_FORMAT_XRGB8888)
> +		return -EINVAL;
> +
> +	if (fb->pitches[0] * fb->height > hv->fb_size)
> +		return -EINVAL;
> +
> +	return 0;
> +}
> +
> +static void hyperv_pipe_update(struct drm_simple_display_pipe *pipe,
> +			       struct drm_plane_state *old_state)
> +{
> +	struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
> +	struct drm_plane_state *state = pipe->plane.state;
> +	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state);
> +	struct drm_rect rect;
> +
> +	if (drm_atomic_helper_damage_merged(old_state, state, &rect)) {
> +		hyperv_blit_to_vram_rect(state->fb, &shadow_plane_state->map[0], &rect);
> +		hyperv_update_dirt(hv->hdev, &rect);
> +	}
> +}
> +
> +static const struct drm_simple_display_pipe_funcs hyperv_pipe_funcs = 
{
> +	.enable	= hyperv_pipe_enable,
> +	.check = hyperv_pipe_check,
> +	.update	= hyperv_pipe_update,
> +	DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS,
> +};
> +
> +static const uint32_t hyperv_formats[] = {
> +	DRM_FORMAT_XRGB8888,
> +};
> +
> +static const uint64_t hyperv_modifiers[] = {
> +	DRM_FORMAT_MOD_LINEAR,
> +	DRM_FORMAT_MOD_INVALID
> +};
> +
> +static inline int hyperv_pipe_init(struct hyperv_drm_device *hv)
> +{
> +	int ret;
> +
> +	ret = drm_simple_display_pipe_init(&hv->dev,
> +					   &hv->pipe,
> +					   &hyperv_pipe_funcs,
> +					   hyperv_formats,
> +					   ARRAY_SIZE(hyperv_formats),
> +					   NULL,
> +					   &hv->connector);
> +	if (ret)
> +		return ret;
> +
> +	drm_plane_enable_fb_damage_clips(&hv->pipe.plane);
> +
> +	return 0;
> +}
> +
> +static struct drm_framebuffer*
> +hyperv_fb_create(struct drm_device *dev, struct drm_file *file_priv,
> +		 const struct drm_mode_fb_cmd2 *mode_cmd)
> +{
> +	return drm_gem_fb_create_with_dirty(dev, file_priv, mode_cmd);

No pointless wrappers, please. Use this function directly.

Best regards
Thomas

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer