Hi,
On 2023/8/1 18:10, Keith Zhao wrote:
Implement drm device registration interface
Signed-off-by: Keith Zhao <keith.zhao@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/Kconfig | 2 +
drivers/gpu/drm/Makefile | 1 +
drivers/gpu/drm/verisilicon/Kconfig | 25 ++
drivers/gpu/drm/verisilicon/Makefile | 13 +
drivers/gpu/drm/verisilicon/vs_drv.c | 273 +++++++++++++++++++++
drivers/gpu/drm/verisilicon/vs_drv.h | 54 ++++
drivers/gpu/drm/verisilicon/vs_gem.c | 298 +++++++++++++++++++++++
drivers/gpu/drm/verisilicon/vs_gem.h | 50 ++++
drivers/gpu/drm/verisilicon/vs_modeset.c | 92 +++++++
drivers/gpu/drm/verisilicon/vs_modeset.h | 13 +
include/uapi/drm/vs_drm.h | 50 ++++
11 files changed, 871 insertions(+)
create mode 100644 drivers/gpu/drm/verisilicon/Kconfig
create mode 100644 drivers/gpu/drm/verisilicon/Makefile
create mode 100644 drivers/gpu/drm/verisilicon/vs_drv.c
create mode 100644 drivers/gpu/drm/verisilicon/vs_drv.h
create mode 100644 drivers/gpu/drm/verisilicon/vs_gem.c
create mode 100644 drivers/gpu/drm/verisilicon/vs_gem.h
create mode 100644 drivers/gpu/drm/verisilicon/vs_modeset.c
create mode 100644 drivers/gpu/drm/verisilicon/vs_modeset.h
create mode 100644 include/uapi/drm/vs_drm.h
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index afb3b2f5f..9ede80ef9 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -363,6 +363,8 @@ source "drivers/gpu/drm/solomon/Kconfig"
source "drivers/gpu/drm/sprd/Kconfig"
+source "drivers/gpu/drm/verisilicon/Kconfig"
+
config DRM_HYPERV
tristate "DRM Support for Hyper-V synthetic video device"
depends on DRM && PCI && MMU && HYPERV
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 7a09a89b4..6db3bc397 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -194,3 +194,4 @@ obj-y += gud/
obj-$(CONFIG_DRM_HYPERV) += hyperv/
obj-y += solomon/
obj-$(CONFIG_DRM_SPRD) += sprd/
+obj-$(CONFIG_DRM_VERISILICON) += verisilicon/
diff --git a/drivers/gpu/drm/verisilicon/Kconfig b/drivers/gpu/drm/verisilicon/Kconfig
new file mode 100644
index 000000000..fcc39dded
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/Kconfig
@@ -0,0 +1,25 @@
+# SPDX-License-Identifier: GPL-2.0
+config DRM_VERISILICON
+ tristate "DRM Support for VeriSilicon"
+ depends on DRM
+ select DRM_KMS_HELPER
+ select DRM_GEM_DMA_HELPER
+ select CMA
+ select DMA_CMA
+ help
+ Choose this option if you have a VeriSilicon soc chipset.
+ This driver provides VeriSilicon kernel mode
+ setting and buffer management. It does not
+ provide 2D or 3D acceleration.
+
+if DRM_VERISILICON
+
+config STARFIVE_HDMI
+ bool "Starfive specific extensions HDMI"
+ help
+ This selects support for StarFive SoC specific extensions
+ for the Innosilicon HDMI driver. If you want to enable
+ HDMI on JH7110 based SoC, you should select this option.
+
+ To compile this driver as a module, choose M here.
+endif
Why not use
diff --git a/drivers/gpu/drm/verisilicon/Makefile b/drivers/gpu/drm/verisilicon/Makefile
new file mode 100644
index 000000000..26cc7e21b
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/Makefile
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0
+
+vs_drm-objs := vs_dc_hw.o \
+ vs_dc.o \
+ vs_crtc.o \
+ vs_drv.o \
+ vs_modeset.o \
+ vs_gem.o \
+ vs_plane.o
+
+vs_drm-$(CONFIG_STARFIVE_HDMI) += starfive_hdmi.o
+obj-$(CONFIG_DRM_VERISILICON) += vs_drm.o
+
diff --git a/drivers/gpu/drm/verisilicon/vs_drv.c b/drivers/gpu/drm/verisilicon/vs_drv.c
new file mode 100644
index 000000000..69591e640
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_drv.c
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ */
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/iommu.h>
+#include <linux/of_graph.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/version.h>
+
+#include <drm/drm_aperture.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_debugfs.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fbdev_generic.h>
+#include <drm/drm_file.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_ioctl.h>
+#include <drm/drm_of.h>
+#include <drm/drm_prime.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "vs_drv.h"
+#include "vs_modeset.h"
+#include "vs_gem.h"
+
+#define DRV_NAME "starfive"
+#define DRV_DESC "Starfive DRM driver"
+#define DRV_DATE "202305161"
The date is not correct here, generally it should have 8 numbers,
while you have 9 digits, why you are so special ?
+#define DRV_MAJOR 1
+#define DRV_MINOR 0
+
+static struct platform_driver vs_drm_platform_driver;
+
+static const struct file_operations fops = {
+ .owner = THIS_MODULE,
+ .open = drm_open,
+ .release = drm_release,
+ .unlocked_ioctl = drm_ioctl,
+ .compat_ioctl = drm_compat_ioctl,
+ .poll = drm_poll,
+ .read = drm_read,
+ .mmap = drm_gem_mmap,
+};
+
+static struct drm_driver vs_drm_driver = {
+ .driver_features = DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_GEM,
+ .lastclose = drm_fb_helper_lastclose,
+ .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
+ .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
You are not using drm-tip branch, in normal case, new patch for drm
should be compile against the drm-tip branch.
the drm_gem_prime_handle_to_fd() and drm_gem_prime_fd_to_handle() function is not be exported anymore.
see 71a7974ac7019 ('drm/prime: Unexport helpers for fd/handle conversion')
So, you patch will be pass the compile test, I guess.
+ .gem_prime_import_sg_table = vs_gem_prime_import_sg_table,
By implement gem_prime_import_sg_table, while in curiosity,
which drivers you are import the shared buffer from ?
Is this vs_gem_prime_import_sg_table() function really has been used and
tested ?
As far as I could understand, most embedded SoC using KMS-RO framework.
By using the KMS-RO framework, typically the GPU driver will import
buffer from the Display controller.
So, why you need implement this function interface?
+ .gem_prime_mmap = drm_gem_prime_mmap,
This hook is(or going to be) obsolete, see 0adec22702d4 ('drm: Remove
struct drm_driver.gem_prime_mmap')
+ .dumb_create = vs_gem_dumb_create,
+ .fops = &fops,
+ .name = DRV_NAME,
+ .desc = DRV_DESC,
+ .date = DRV_DATE,
+ .major = DRV_MAJOR,
+ .minor = DRV_MINOR,
+};
+
+void vs_drm_update_pitch_alignment(struct drm_device *drm_dev,
+ unsigned int alignment)
+{
+ struct vs_drm_private *priv = to_vs_dev(drm_dev);
+
+ if (alignment > priv->pitch_alignment)
+ priv->pitch_alignment = alignment;
+}
+
+static int vs_drm_bind(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct vs_drm_private *priv;
+ int ret;
+ static u64 dma_mask = DMA_BIT_MASK(40);
+ struct drm_device *drm_dev;
+
+ /* Remove existing drivers that may own the framebuffer memory. */
+ ret = drm_aperture_remove_framebuffers(&vs_drm_driver);
+ if (ret) {
+ dev_err(dev,
+ "Failed to remove existing framebuffers - %d.\n",
+ ret);
+ return ret;
+ }
+
+ priv = devm_drm_dev_alloc(dev, &vs_drm_driver, struct vs_drm_private, base);
+ if (IS_ERR(priv))
+ return PTR_ERR(priv);
+
+ priv->pitch_alignment = 64;
+ priv->dma_dev = priv->base.dev;
+ priv->dma_dev->coherent_dma_mask = dma_mask;
+ drm_dev = &priv->base;
+ platform_set_drvdata(pdev, drm_dev);
+
+ vs_mode_config_init(drm_dev);
+
+ /* Now try and bind all our sub-components */
+ ret = component_bind_all(dev, drm_dev);
+ if (ret)
+ goto err_mode;
+
+ ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
+ if (ret)
+ goto err_bind;
+
+ drm_mode_config_reset(drm_dev);
+
+ drm_kms_helper_poll_init(drm_dev);
+
+ ret = drm_dev_register(drm_dev, 0);
+ if (ret)
+ goto err_helper;
+
+ drm_fbdev_generic_setup(drm_dev, 32);
+
+ return 0;
+
+err_helper:
+ drm_kms_helper_poll_fini(drm_dev);
+err_bind:
+ component_unbind_all(drm_dev->dev, drm_dev);
+err_mode:
+ drm_mode_config_cleanup(drm_dev);
+
+ return ret;
+}
+
+static void vs_drm_unbind(struct device *dev)
+{
+ struct drm_device *drm_dev = dev_get_drvdata(dev);
+
+ drm_dev_unregister(drm_dev);
+
+ drm_kms_helper_poll_fini(drm_dev);
+
+ component_unbind_all(drm_dev->dev, drm_dev);
+}
+
+static const struct component_master_ops vs_drm_ops = {
+ .bind = vs_drm_bind,
+ .unbind = vs_drm_unbind,
+};
+
+static struct platform_driver *drm_sub_drivers[] = {
+
+
+ /* connector + encoder*/
+#ifdef CONFIG_STARFIVE_HDMI
+ &starfive_hdmi_driver,
+#endif
+
+};
+
+#define NUM_DRM_DRIVERS \
+ (sizeof(drm_sub_drivers) / sizeof(struct platform_driver *))
I think, the macro is bad name,
you have only one drm drivers, all of the rest are sub platform drivers
which need to bind to the only one drm master.
+static int compare_dev(struct device *dev, void *data)
+{
+ return dev == (struct device *)data;
+}
+
There already has a 'component_compare_dev()' defined in component.c
(see include/linux/component.h)
why you need want implement one yourself.
+static struct component_match *vs_drm_match_add(struct device *dev)
+{
+ struct component_match *match = NULL;
+ int i;
+
+ for (i = 0; i < NUM_DRM_DRIVERS; ++i) {
+ struct platform_driver *drv = drm_sub_drivers[i];
+ struct device *p = NULL, *d;
+
+ while ((d = platform_find_device_by_driver(p, &drv->driver))) {
+ put_device(p);
+
+ component_match_add(dev, &match, compare_dev, d);
+ p = d;
+ }
+ put_device(p);
+ }
+
+ return match ?: ERR_PTR(-ENODEV);
+}
+
+static int vs_drm_platform_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct component_match *match;
+
+ match = vs_drm_match_add(dev);
+ if (IS_ERR(match))
+ return PTR_ERR(match);
+
+ return component_master_add_with_match(dev, &vs_drm_ops, match);
+}
+
+static int vs_drm_platform_remove(struct platform_device *pdev)
+{
+ component_master_del(&pdev->dev, &vs_drm_ops);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int vs_drm_suspend(struct device *dev)
+{
+ return drm_mode_config_helper_suspend(dev_get_drvdata(dev));
+}
+
+static int vs_drm_resume(struct device *dev)
+{
+ drm_mode_config_helper_resume(dev_get_drvdata(dev));
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(vs_drm_pm_ops, vs_drm_suspend, vs_drm_resume);
+
+static const struct of_device_id vs_drm_dt_ids[] = {
+ { .compatible = "starfive,display-subsystem", },
+ { },
+};
+
+MODULE_DEVICE_TABLE(of, vs_drm_dt_ids);
+
+static struct platform_driver vs_drm_platform_driver = {
+ .probe = vs_drm_platform_probe,
+ .remove = vs_drm_platform_remove,
+
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = vs_drm_dt_ids,
+ .pm = &vs_drm_pm_ops,
+ },
+};
+
+static int __init vs_drm_init(void)
+{
+ int ret;
+
+ ret = platform_register_drivers(drm_sub_drivers, NUM_DRM_DRIVERS);
+ if (ret)
+ return ret;
+
+ ret = platform_driver_register(&vs_drm_platform_driver);
+ if (ret)
+ platform_unregister_drivers(drm_sub_drivers, NUM_DRM_DRIVERS);
+
+ return ret;
+}
+
+static void __exit vs_drm_fini(void)
+{
+ platform_driver_unregister(&vs_drm_platform_driver);
+ platform_unregister_drivers(drm_sub_drivers, NUM_DRM_DRIVERS);
+}
+
+module_init(vs_drm_init);
+module_exit(vs_drm_fini);
+
+MODULE_DESCRIPTION("VeriSilicon DRM Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/verisilicon/vs_drv.h b/drivers/gpu/drm/verisilicon/vs_drv.h
new file mode 100644
index 000000000..6ddc99dcf
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_drv.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ */
+
+#ifndef __VS_DRV_H__
+#define __VS_DRV_H__
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/version.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_managed.h>
+
+/*
+ *
+ * @dma_dev: device for DMA API.
+ * - use the first attached device if support iommu
+ else use drm device (only contiguous buffer support)
+ * @domain: iommu domain for DRM.
+ * - all DC IOMMU share same domain to reduce mapping
+ * @pitch_alignment: buffer pitch alignment required by sub-devices.
+ *
+ */
+struct vs_drm_private {
+ struct drm_device base;
+ struct device *dma_dev;
+ struct iommu_domain *domain;
+ unsigned int pitch_alignment;
+};
+
+static inline struct vs_drm_private *
+to_vs_dev(const struct drm_device *dev)
+{
+ return container_of(dev, struct vs_drm_private, base);
+}
+
+void vs_drm_update_pitch_alignment(struct drm_device *drm_dev,
+ unsigned int alignment);
+
+
+static inline bool is_iommu_enabled(struct drm_device *dev)
+{
+ struct vs_drm_private *priv = to_vs_dev(dev);
+
+ return priv->domain ? true : false;
+}
+
+#ifdef CONFIG_STARFIVE_HDMI
+extern struct platform_driver starfive_hdmi_driver;
+#endif
+
+#endif /* __VS_DRV_H__ */
diff --git a/drivers/gpu/drm/verisilicon/vs_gem.c b/drivers/gpu/drm/verisilicon/vs_gem.c
new file mode 100644
index 000000000..a7d5a5c7b
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_gem.c
@@ -0,0 +1,298 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ */
+
+#include <linux/dma-buf.h>
+#include <linux/of_reserved_mem.h>
+#include <drm/drm_gem_dma_helper.h>
+
+#include "vs_drv.h"
+#include "vs_gem.h"
+
+MODULE_IMPORT_NS(DMA_BUF);
+
+static const struct drm_gem_object_funcs vs_gem_default_funcs;
+
+static int vs_gem_alloc_buf(struct vs_gem_object *vs_obj)
+{
+ struct drm_device *dev = vs_obj->base.base.dev;
+ unsigned int nr_pages;
+ struct sg_table sgt;
+ int ret = -ENOMEM;
+
+ if (vs_obj->base.dma_addr) {
+ drm_dbg_kms(dev, "already allocated.\n");
+ return 0;
+ }
+
+ vs_obj->base.dma_addr = DMA_ATTR_WRITE_COMBINE | DMA_ATTR_FORCE_CONTIGUOUS
+ | DMA_ATTR_NO_KERNEL_MAPPING;
+
+ nr_pages = vs_obj->base.base.size >> PAGE_SHIFT;
+
+ vs_obj->pages = kvmalloc_array(nr_pages, sizeof(struct page *),
+ GFP_KERNEL | __GFP_ZERO);
+ if (!vs_obj->pages)
+ return -ENOMEM;
+
+ vs_obj->cookie = dma_alloc_attrs(dev->dev, vs_obj->base.base.size,
+ &vs_obj->base.dma_addr, GFP_KERNEL,
+ vs_obj->dma_attrs);
+
+ if (!vs_obj->cookie) {
+ dev_err(dev->dev, "failed to allocate buffer.\n");
+ goto err_free;
+ }
+
+ vs_obj->iova = vs_obj->base.dma_addr;
+
+ ret = dma_get_sgtable_attrs(dev->dev, &sgt,
+ vs_obj->cookie, vs_obj->base.dma_addr,
+ vs_obj->base.base.size, vs_obj->dma_attrs);
+ if (ret < 0) {
+ dev_err(dev->dev, "failed to get sgtable.\n");
+ goto err_mem_free;
+ }
+
+ if (drm_prime_sg_to_page_array(&sgt, vs_obj->pages, nr_pages)) {
+ dev_err(dev->dev, "invalid sgtable.\n");
+ ret = -EINVAL;
+ goto err_sgt_free;
+ }
+
+ sg_free_table(&sgt);
+
+ return 0;
+
+err_sgt_free:
+ sg_free_table(&sgt);
+err_mem_free:
+ dma_free_attrs(dev->dev, vs_obj->base.base.size, vs_obj->cookie,
+ vs_obj->base.dma_addr, vs_obj->dma_attrs);
+err_free:
+ kvfree(vs_obj->pages);
+
+ return ret;
+}
+
+static void vs_gem_free_buf(struct vs_gem_object *vs_obj)
+{
+ struct drm_device *dev = vs_obj->base.base.dev;
+
+ if (!vs_obj->base.dma_addr) {
+ drm_dbg_kms(dev, "dma_addr is invalid.\n");
+ return;
+ }
+
+ dma_free_attrs(dev->dev, vs_obj->base.base.size, vs_obj->cookie,
+ (dma_addr_t)vs_obj->base.dma_addr,
+ vs_obj->dma_attrs);
+
+ kvfree(vs_obj->pages);
+}
+
+static void vs_gem_free_object(struct drm_gem_object *obj)
+{
+ struct vs_gem_object *vs_obj = to_vs_gem_object(obj);
+
+ if (obj->import_attach)
+ drm_prime_gem_destroy(obj, vs_obj->base.sgt);
+ else
+ vs_gem_free_buf(vs_obj);
+
+ drm_gem_object_release(obj);
+
+ kfree(vs_obj);
+}
+
+static struct vs_gem_object *vs_gem_alloc_object(struct drm_device *dev,
+ size_t size)
+{
+ struct vs_gem_object *vs_obj;
+ struct drm_gem_object *obj;
+ int ret;
+
+ vs_obj = kzalloc(sizeof(*vs_obj), GFP_KERNEL);
+ if (!vs_obj)
+ return ERR_PTR(-ENOMEM);
+
+ vs_obj->base.base.size = size;
+ obj = &vs_obj->base.base;
+
+ ret = drm_gem_object_init(dev, obj, size);
+ if (ret)
+ goto err_free;
+
+ vs_obj->base.base.funcs = &vs_gem_default_funcs;
+
+ ret = drm_gem_create_mmap_offset(obj);
+ if (ret) {
+ drm_gem_object_release(obj);
+ goto err_free;
+ }
+
+ return vs_obj;
+
+err_free:
+ kfree(vs_obj);
+ return ERR_PTR(ret);
+}
+
+static struct vs_gem_object *vs_gem_create_object(struct drm_device *dev,
+ size_t size)
+{
+ struct vs_gem_object *vs_obj;
+ int ret;
+
+ size = PAGE_ALIGN(size);
+
+ vs_obj = vs_gem_alloc_object(dev, size);
+ if (IS_ERR(vs_obj))
+ return vs_obj;
+
+ ret = vs_gem_alloc_buf(vs_obj);
+ if (ret) {
+ drm_gem_object_release(&vs_obj->base.base);
+ kfree(vs_obj);
+ return ERR_PTR(ret);
+ }
+
+ return vs_obj;
+}
+
+static struct vs_gem_object *vs_gem_create_with_handle(struct drm_device *dev,
+ struct drm_file *file,
+ size_t size,
+ unsigned int *handle)
+{
+ struct vs_gem_object *vs_obj;
+ struct drm_gem_object *obj;
+ int ret;
+
+ vs_obj = vs_gem_create_object(dev, size);
+ if (IS_ERR(vs_obj))
+ return vs_obj;
+
+ obj = &vs_obj->base.base;
+
+ ret = drm_gem_handle_create(file, obj, handle);
+
+ drm_gem_object_put(obj);
+
+ if (ret)
+ return ERR_PTR(ret);
+
+ return vs_obj;
+}
+
+static struct sg_table *vs_gem_prime_get_sg_table(struct drm_gem_object *obj)
+{
+ struct vs_gem_object *vs_obj = to_vs_gem_object(obj);
+
+ return drm_prime_pages_to_sg(obj->dev, vs_obj->pages,
+ vs_obj->base.base.size >> PAGE_SHIFT);
+}
+
+static int vs_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
+{
+ struct vs_gem_object *vs_obj = to_vs_gem_object(obj);
+
+ vs_obj->base.vaddr = vs_obj->dma_attrs & DMA_ATTR_NO_KERNEL_MAPPING ?
+ page_address(vs_obj->cookie) : vs_obj->cookie;
+
+ return drm_gem_dma_vmap(&vs_obj->base, map);
+}
+
+static const struct vm_operations_struct vs_vm_ops = {
+ .open = drm_gem_vm_open,
+ .close = drm_gem_vm_close,
+};
+
+static const struct drm_gem_object_funcs vs_gem_default_funcs = {
+ .free = vs_gem_free_object,
+ .get_sg_table = vs_gem_prime_get_sg_table,
+ .vmap = vs_gem_prime_vmap,
+ .mmap = drm_gem_dma_object_mmap,
+ .vm_ops = &vs_vm_ops,
+};
+
+int vs_gem_dumb_create(struct drm_file *file,
+ struct drm_device *dev,
+ struct drm_mode_create_dumb *args)
+{
+ struct vs_drm_private *priv = to_vs_dev(dev);
+ struct vs_gem_object *vs_obj;
+ unsigned int pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
+
+ if (args->bpp % 10)
+ args->pitch = ALIGN(pitch, priv->pitch_alignment);
+ else
+ /* for costum 10bit format with no bit gaps */
+ args->pitch = pitch;
+ args->size = PAGE_ALIGN(args->pitch * args->height);
+ vs_obj = vs_gem_create_with_handle(dev, file, args->size,
+ &args->handle);
+ return PTR_ERR_OR_ZERO(vs_obj);
+}
+
+struct drm_gem_object *
+vs_gem_prime_import_sg_table(struct drm_device *dev,
+ struct dma_buf_attachment *attach,
+ struct sg_table *sgt)
+{
+ struct vs_gem_object *vs_obj;
+ int npages;
+ int ret;
+ struct scatterlist *s;
+ u32 i;
+ dma_addr_t expected;
+ size_t size = attach->dmabuf->size;
+
+ size = PAGE_ALIGN(size);
+
+ vs_obj = vs_gem_alloc_object(dev, size);
+ if (IS_ERR(vs_obj))
+ return ERR_CAST(vs_obj);
+
+ expected = sg_dma_address(sgt->sgl);
+ for_each_sg(sgt->sgl, s, sgt->nents, i) {
+ if (sg_dma_address(s) != expected) {
+ DRM_ERROR("sg_table is not contiguous");
+ ret = -EINVAL;
+ goto err;
+ }
+ if (sg_dma_len(s) & (PAGE_SIZE - 1)) {
+ ret = -EINVAL;
+ goto err;
+ }
+ if (i == 0)
+ vs_obj->iova = sg_dma_address(s);
+ expected = sg_dma_address(s) + sg_dma_len(s);
+ }
+
+ vs_obj->base.dma_addr = sg_dma_address(sgt->sgl);
+
+ npages = vs_obj->base.base.size >> PAGE_SHIFT;
+ vs_obj->pages = kvmalloc_array(npages, sizeof(struct page *),
+ GFP_KERNEL);
+ if (!vs_obj->pages) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ ret = drm_prime_sg_to_page_array(sgt, vs_obj->pages, npages);
+ if (ret)
+ goto err_free_page;
+
+ vs_obj->base.sgt = sgt;
+
+ return &vs_obj->base.base;
+
+err_free_page:
+ kvfree(vs_obj->pages);
+err:
+ vs_gem_free_object(&vs_obj->base.base);
+
+ return ERR_PTR(ret);
+}
diff --git a/drivers/gpu/drm/verisilicon/vs_gem.h b/drivers/gpu/drm/verisilicon/vs_gem.h
new file mode 100644
index 000000000..d9ff6d23b
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_gem.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ */
+
+#ifndef __VS_GEM_H__
+#define __VS_GEM_H__
+
+#include <linux/dma-buf.h>
+
+#include <drm/drm_gem.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_prime.h>
+
+#include "vs_drv.h"
+/*
+ *
+ * @base: drm_gem_dma_object.
+ * @cookie: cookie returned by dma_alloc_attrs
+ * - not kernel virtual address with DMA_ATTR_NO_KERNEL_MAPPING
+ * @dma_attrs: attribute for DMA API
+ * @get_pages: flag for manually applying for non-contiguous memory.
+ * @pages: Array of backing pages.
+ *
+ */
+struct vs_gem_object {
+ struct drm_gem_dma_object base;
+ void *cookie;
+ u32 iova;
+ unsigned long dma_attrs;
+ bool get_pages;
+ struct page **pages;
+};
+
+static inline struct vs_gem_object *
+to_vs_gem_object(const struct drm_gem_object *bo)
+{
+ return container_of(to_drm_gem_dma_obj(bo), struct vs_gem_object, base);
+}
+
+int vs_gem_dumb_create(struct drm_file *file_priv,
+ struct drm_device *drm,
+ struct drm_mode_create_dumb *args);
+
+struct drm_gem_object *
+vs_gem_prime_import_sg_table(struct drm_device *dev,
+ struct dma_buf_attachment *attach,
+ struct sg_table *sgt);
+
+#endif /* __VS_GEM_H__ */
diff --git a/drivers/gpu/drm/verisilicon/vs_modeset.c b/drivers/gpu/drm/verisilicon/vs_modeset.c
new file mode 100644
index 000000000..cd0bdf530
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_modeset.c
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_gem_dma_helper.h>
+
+#include "vs_modeset.h"
+#include "vs_gem.h"
+
+#define fourcc_mod_vs_get_type(val) \
+ (((val) & DRM_FORMAT_MOD_VS_TYPE_MASK) >> 54)
+
+struct vs_gem_object *vs_fb_get_gem_obj(struct drm_framebuffer *fb,
+ unsigned char plane)
+{
+ if (plane > DRM_FORMAT_MAX_PLANES)
+ return NULL;
+
+ return to_vs_gem_object(fb->obj[plane]);
+}
+
+static const struct drm_format_info vs_formats[] = {
+ {.format = DRM_FORMAT_NV12, .depth = 0, .num_planes = 2, .char_per_block = { 20, 40, 0 },
+ .block_w = { 4, 4, 0 }, .block_h = { 4, 4, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true},
+ {.format = DRM_FORMAT_YUV444, .depth = 0, .num_planes = 3, .char_per_block = { 20, 20, 20 },
+ .block_w = { 4, 4, 4 }, .block_h = { 4, 4, 4 }, .hsub = 1, .vsub = 1, .is_yuv = true},
+};
+
+static const struct drm_format_info *
+vs_lookup_format_info(const struct drm_format_info formats[],
+ int num_formats, u32 format)
+{
+ int i;
+
+ for (i = 0; i < num_formats; i++) {
+ if (formats[i].format == format)
+ return &formats[i];
+ }
+
+ return NULL;
+}
+
+static const struct drm_format_info *
+vs_get_format_info(const struct drm_mode_fb_cmd2 *cmd)
+{
+ if (fourcc_mod_vs_get_type(cmd->modifier[0]) ==
+ DRM_FORMAT_MOD_VS_TYPE_CUSTOM_10BIT)
+ return vs_lookup_format_info(vs_formats, ARRAY_SIZE(vs_formats),
+ cmd->pixel_format);
+ else
+ return NULL;
+}
+
+static const struct drm_mode_config_funcs vs_mode_config_funcs = {
+ .fb_create = drm_gem_fb_create,
+ .get_format_info = vs_get_format_info,
+ .output_poll_changed = drm_fb_helper_output_poll_changed,
+ .atomic_check = drm_atomic_helper_check,
+ .atomic_commit = drm_atomic_helper_commit,
+};
+
+static struct drm_mode_config_helper_funcs vs_mode_config_helpers = {
+ .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
+};
+
+void vs_mode_config_init(struct drm_device *dev)
+{
+ drm_mode_config_init(dev);
+ dev->mode_config.fb_modifiers_not_supported = false;
+
+ if (dev->mode_config.max_width == 0 ||
+ dev->mode_config.max_height == 0) {
Not sure if the 'if' is really needed .
+ dev->mode_config.min_width = 0;
+ dev->mode_config.min_height = 0;
+ dev->mode_config.max_width = 4096;
+ dev->mode_config.max_height = 4096;
+ }
+ dev->mode_config.funcs = &vs_mode_config_funcs;
+ dev->mode_config.helper_private = &vs_mode_config_helpers;
+}
diff --git a/drivers/gpu/drm/verisilicon/vs_modeset.h b/drivers/gpu/drm/verisilicon/vs_modeset.h
new file mode 100644
index 000000000..2e1f04a8a
--- /dev/null
+++ b/drivers/gpu/drm/verisilicon/vs_modeset.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 VeriSilicon Holdings Co., Ltd.
+ */
+
+#ifndef __VS_FB_H__
+#define __VS_FB_H__
+
+struct vs_gem_object *vs_fb_get_gem_obj(struct drm_framebuffer *fb,
+ unsigned char plane);
+
+void vs_mode_config_init(struct drm_device *dev);
+#endif /* __VS_FB_H__ */
diff --git a/include/uapi/drm/vs_drm.h b/include/uapi/drm/vs_drm.h
new file mode 100644
index 000000000..96b7fc95d
--- /dev/null
+++ b/include/uapi/drm/vs_drm.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2020 VeriSilicon Holdings Co., Ltd.
+ */
+
+#ifndef __VS_DRM_H__
+#define __VS_DRM_H__
+
+#include "drm.h"
+
+enum drm_vs_degamma_mode {
+ VS_DEGAMMA_DISABLE = 0,
+ VS_DEGAMMA_BT709 = 1,
+ VS_DEGAMMA_BT2020 = 2,
+};
+
+enum drm_vs_sync_dc_mode {
+ VS_SINGLE_DC = 0,
+ VS_MULTI_DC_PRIMARY = 1,
+ VS_MULTI_DC_SECONDARY = 2,
+};
+
+enum drm_vs_mmu_prefetch_mode {
+ VS_MMU_PREFETCH_DISABLE = 0,
+ VS_MMU_PREFETCH_ENABLE = 1,
+};
+
+struct drm_vs_watermark {
+ __u32 watermark;
+ __u8 qos_low;
+ __u8 qos_high;
+};
+
+struct drm_vs_color_mgmt {
+ __u32 colorkey;
+ __u32 colorkey_high;
+ __u32 clear_value;
+ bool clear_enable;
+ bool transparency;
+};
+
+struct drm_vs_roi {
+ bool enable;
+ __u16 roi_x;
+ __u16 roi_y;
+ __u16 roi_w;
+ __u16 roi_h;
+};
+
+#endif /* __VS_DRM_H__ */
