[PATCH RFC v1 2/6] drm/sprd: add Unisoc's drm kms master
Thomas Zimmermann
tzimmermann at suse.de
Mon Jan 6 10:17:00 UTC 2020
Hi
Am 06.01.20 um 11:11 schrieb Thomas Zimmermann:
> Hi Kevin
>
> Am 16.12.19 um 12:40 schrieb Kevin Tang:
>> From: Kevin Tang <kevin.tang at unisoc.com>
>>
>> Adds drm support for the Unisoc's display subsystem.
>>
>> This is drm device and gem driver. This driver provides support for the
>> Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
>>
>> Cc: Orson Zhai <orsonzhai at gmail.com>
>> Cc: Baolin Wang <baolin.wang at linaro.org>
>> Cc: Chunyan Zhang <zhang.lyra at gmail.com>
>> Signed-off-by: Kevin Tang <kevin.tang at unisoc.com>
>> ---
>> drivers/gpu/drm/Kconfig | 2 +
>> drivers/gpu/drm/Makefile | 1 +
>> drivers/gpu/drm/sprd/Kconfig | 14 ++
>> drivers/gpu/drm/sprd/Makefile | 8 ++
>> drivers/gpu/drm/sprd/sprd_drm.c | 286 ++++++++++++++++++++++++++++++++++++++++
>> drivers/gpu/drm/sprd/sprd_drm.h | 16 +++
>> drivers/gpu/drm/sprd/sprd_gem.c | 178 +++++++++++++++++++++++++
>> drivers/gpu/drm/sprd/sprd_gem.h | 30 +++++
>> 8 files changed, 535 insertions(+)
>> create mode 100644 drivers/gpu/drm/sprd/Kconfig
>> create mode 100644 drivers/gpu/drm/sprd/Makefile
>> create mode 100644 drivers/gpu/drm/sprd/sprd_drm.c
>> create mode 100644 drivers/gpu/drm/sprd/sprd_drm.h
>> create mode 100644 drivers/gpu/drm/sprd/sprd_gem.c
>> create mode 100644 drivers/gpu/drm/sprd/sprd_gem.h
>>
>> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
>> index bfdadc3..cead12c 100644
>> --- a/drivers/gpu/drm/Kconfig
>> +++ b/drivers/gpu/drm/Kconfig
>> @@ -387,6 +387,8 @@ source "drivers/gpu/drm/aspeed/Kconfig"
>>
>> source "drivers/gpu/drm/mcde/Kconfig"
>>
>> +source "drivers/gpu/drm/sprd/Kconfig"
>> +
>> # Keep legacy drivers last
>>
>> menuconfig DRM_LEGACY
>> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
>> index 9f1c7c4..85ca211 100644
>> --- a/drivers/gpu/drm/Makefile
>> +++ b/drivers/gpu/drm/Makefile
>> @@ -122,3 +122,4 @@ obj-$(CONFIG_DRM_LIMA) += lima/
>> obj-$(CONFIG_DRM_PANFROST) += panfrost/
>> obj-$(CONFIG_DRM_ASPEED_GFX) += aspeed/
>> obj-$(CONFIG_DRM_MCDE) += mcde/
>> +obj-$(CONFIG_DRM_SPRD) += sprd/
>> diff --git a/drivers/gpu/drm/sprd/Kconfig b/drivers/gpu/drm/sprd/Kconfig
>> new file mode 100644
>> index 0000000..79f286b
>> --- /dev/null
>> +++ b/drivers/gpu/drm/sprd/Kconfig
>> @@ -0,0 +1,14 @@
>> +config DRM_SPRD
>> + tristate "DRM Support for Unisoc SoCs Platform"
>> + depends on ARCH_SPRD
>> + depends on DRM && OF
>> + select DRM_KMS_HELPER
>> + select DRM_GEM_CMA_HELPER
>> + select DRM_KMS_CMA_HELPER
>> + select DRM_MIPI_DSI
>> + select DRM_PANEL
>> + select VIDEOMODE_HELPERS
>> + select BACKLIGHT_CLASS_DEVICE
>> + help
>> + Choose this option if you have a Unisoc chipsets.
>> + If M is selected the module will be called sprd-drm.
>> \ No newline at end of file
>> diff --git a/drivers/gpu/drm/sprd/Makefile b/drivers/gpu/drm/sprd/Makefile
>> new file mode 100644
>> index 0000000..df0b316
>> --- /dev/null
>> +++ b/drivers/gpu/drm/sprd/Makefile
>> @@ -0,0 +1,8 @@
>> +# SPDX-License-Identifier: GPL-2.0
>> +
>> +ccflags-y += -Iinclude/drm
>> +
>> +subdir-ccflags-y += -I$(src)
>> +
>> +obj-y := sprd_drm.o \
>> + sprd_gem.o
>> \ No newline at end of file
>> diff --git a/drivers/gpu/drm/sprd/sprd_drm.c b/drivers/gpu/drm/sprd/sprd_drm.c
>> new file mode 100644
>> index 0000000..4aee25fa4
>> --- /dev/null
>> +++ b/drivers/gpu/drm/sprd/sprd_drm.c
>> @@ -0,0 +1,286 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (C) 2019 Unisoc Inc.
>> + */
>> +
>> +#include <linux/component.h>
>> +#include <linux/dma-mapping.h>
>> +#include <linux/module.h>
>> +#include <linux/mutex.h>
>> +#include <linux/of_graph.h>
>> +#include <linux/of_platform.h>
>> +
>> +#include <drm/drm_atomic_helper.h>
>> +#include <drm/drm_crtc_helper.h>
>> +#include <drm/drm_drv.h>
>> +#include <drm/drm_gem_cma_helper.h>
>> +#include <drm/drm_gem_framebuffer_helper.h>
>> +#include <drm/drm_probe_helper.h>
>> +#include <drm/drm_vblank.h>
>> +
>> +#include "sprd_drm.h"
>> +#include "sprd_gem.h"
>> +
>> +#define DRIVER_NAME "sprd"
>> +#define DRIVER_DESC "Spreadtrum SoCs' DRM Driver"
>> +#define DRIVER_DATE "20191101"
>> +#define DRIVER_MAJOR 1
>> +#define DRIVER_MINOR 0
>> +
>> +static const struct drm_mode_config_helper_funcs sprd_drm_mode_config_helper = {
>> + .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
>> +};
>> +
>> +static const struct drm_mode_config_funcs sprd_drm_mode_config_funcs = {
>> + .fb_create = drm_gem_fb_create,
>> + .atomic_check = drm_atomic_helper_check,
>> + .atomic_commit = drm_atomic_helper_commit,
>> +};
>> +
>> +static void sprd_drm_mode_config_init(struct drm_device *drm)
>> +{
>> + drm_mode_config_init(drm);
>> +
>> + drm->mode_config.min_width = 0;
>> + drm->mode_config.min_height = 0;
>> + drm->mode_config.max_width = 8192;
>> + drm->mode_config.max_height = 8192;
>> + drm->mode_config.allow_fb_modifiers = true;
>> +
>> + drm->mode_config.funcs = &sprd_drm_mode_config_funcs;
>> + drm->mode_config.helper_private = &sprd_drm_mode_config_helper;
>> +}
>> +
>> +static const struct file_operations sprd_drm_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,
>> + .llseek = no_llseek,
>> + .mmap = sprd_gem_mmap,
>> +};
>> +
>> +static struct drm_driver sprd_drm_drv = {
>> + .driver_features = DRIVER_GEM | DRIVER_ATOMIC,
>> + .fops = &sprd_drm_fops,
>> + .gem_vm_ops = &drm_gem_cma_vm_ops,
>> + .gem_free_object_unlocked = sprd_gem_free_object,
>> + .dumb_create = sprd_gem_dumb_create,
>> + .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
>> + .gem_prime_import = drm_gem_prime_import,
>> + .gem_prime_import_sg_table = sprd_gem_prime_import_sg_table,
>> +
>> + .name = DRIVER_NAME,
>> + .desc = DRIVER_DESC,
>> + .date = DRIVER_DATE,
>> + .major = DRIVER_MAJOR,
>> + .minor = DRIVER_MINOR,
>> +};
>> +
>> +static int sprd_drm_bind(struct device *dev)
>> +{
>> + struct drm_device *drm;
>> + struct sprd_drm *sprd;
>> + int err;
>> +
>> + drm = drm_dev_alloc(&sprd_drm_drv, dev);
>> + if (IS_ERR(drm))
>> + return PTR_ERR(drm);
>> +
>> + dev_set_drvdata(dev, drm);
>> +
>> + sprd = devm_kzalloc(drm->dev, sizeof(*sprd), GFP_KERNEL);
>> + if (!sprd) {
>> + err = -ENOMEM;
>> + goto err_free_drm;
>> + }
>> + drm->dev_private = sprd;
>> +
>> + sprd_drm_mode_config_init(drm);
>> +
>> + /* bind and init sub drivers */
>> + err = component_bind_all(drm->dev, drm);
>> + if (err) {
>> + DRM_ERROR("failed to bind all component.\n");
>> + goto err_dc_cleanup;
>> + }
>> +
>> + /* vblank init */
>> + err = drm_vblank_init(drm, drm->mode_config.num_crtc);
>> + if (err) {
>> + DRM_ERROR("failed to initialize vblank.\n");
>> + goto err_unbind_all;
>> + }
>> + /* with irq_enabled = true, we can use the vblank feature. */
>> + drm->irq_enabled = true;
>> +
>> + /* reset all the states of crtc/plane/encoder/connector */
>> + drm_mode_config_reset(drm);
>> +
>> + /* init kms poll for handling hpd */
>> + drm_kms_helper_poll_init(drm);
>> +
>> + err = drm_dev_register(drm, 0);
>> + if (err < 0)
>> + goto err_kms_helper_poll_fini;
>> +
>> + return 0;
>> +
>> +err_kms_helper_poll_fini:
>> + drm_kms_helper_poll_fini(drm);
>> +err_unbind_all:
>> + component_unbind_all(drm->dev, drm);
>> +err_dc_cleanup:
>> + drm_mode_config_cleanup(drm);
>> +err_free_drm:
>> + drm_dev_put(drm);
>> + return err;
>> +}
>> +
>> +static void sprd_drm_unbind(struct device *dev)
>> +{
>> + drm_put_dev(dev_get_drvdata(dev));
>> +}
>> +
>> +static const struct component_master_ops sprd_drm_component_ops = {
>> + .bind = sprd_drm_bind,
>> + .unbind = sprd_drm_unbind,
>> +};
>> +
>> +static int compare_of(struct device *dev, void *data)
>> +{
>> + struct device_node *np = data;
>> +
>> + DRM_DEBUG("compare %s\n", np->full_name);
>> +
>> + return dev->of_node == np;
>> +}
>> +
>> +static int sprd_drm_component_probe(struct device *dev,
>> + const struct component_master_ops *m_ops)
>> +{
>> + struct device_node *ep, *port, *remote;
>> + struct component_match *match = NULL;
>> + int i;
>> +
>> + if (!dev->of_node)
>> + return -EINVAL;
>> +
>> + /*
>> + * Bind the crtc's ports first, so that drm_of_find_possible_crtcs()
>> + * called from encoder's .bind callbacks works as expected
>> + */
>> + for (i = 0; ; i++) {
>> + port = of_parse_phandle(dev->of_node, "ports", i);
>> + if (!port)
>> + break;
>> +
>> + if (!of_device_is_available(port->parent)) {
>> + of_node_put(port);
>> + continue;
>> + }
>> +
>> + component_match_add(dev, &match, compare_of, port->parent);
>> + of_node_put(port);
>> + }
>> +
>> + if (i == 0) {
>> + dev_err(dev, "missing 'ports' property\n");
>> + return -ENODEV;
>> + }
>> +
>> + if (!match) {
>> + dev_err(dev, "no available port\n");
>> + return -ENODEV;
>> + }
>> +
>> + /*
>> + * For bound crtcs, bind the encoders attached to their remote endpoint
>> + */
>> + for (i = 0; ; i++) {
>> + port = of_parse_phandle(dev->of_node, "ports", i);
>> + if (!port)
>> + break;
>> +
>> + if (!of_device_is_available(port->parent)) {
>> + of_node_put(port);
>> + continue;
>> + }
>> +
>> + for_each_child_of_node(port, ep) {
>> + remote = of_graph_get_remote_port_parent(ep);
>> + if (!remote || !of_device_is_available(remote)) {
>> + of_node_put(remote);
>> + continue;
>> + } else if (!of_device_is_available(remote->parent)) {
>> + dev_warn(dev, "parent device of %s is not available\n",
>> + remote->full_name);
>> + of_node_put(remote);
>> + continue;
>> + }
>> +
>> + component_match_add(dev, &match, compare_of, remote);
>> + of_node_put(remote);
>> + }
>> + of_node_put(port);
>> + }
>> +
>> + return component_master_add_with_match(dev, m_ops, match);
>> +}
>> +
>> +static int sprd_drm_probe(struct platform_device *pdev)
>> +{
>> + int ret;
>> +
>> + ret = dma_set_mask_and_coherent(&pdev->dev, ~0);
>> + if (ret) {
>> + DRM_ERROR("dma_set_mask_and_coherent failed (%d)\n", ret);
>> + return ret;
>> + }
>> +
>> + return sprd_drm_component_probe(&pdev->dev, &sprd_drm_component_ops);
>> +}
>> +
>> +static int sprd_drm_remove(struct platform_device *pdev)
>> +{
>> + component_master_del(&pdev->dev, &sprd_drm_component_ops);
>> + return 0;
>> +}
>> +
>> +static void sprd_drm_shutdown(struct platform_device *pdev)
>> +{
>> + struct drm_device *drm = platform_get_drvdata(pdev);
>> +
>> + if (!drm) {
>> + DRM_WARN("drm device is not available, no shutdown\n");
>> + return;
>> + }
>> +
>> + drm_atomic_helper_shutdown(drm);
>> +}
>> +
>> +static const struct of_device_id sprd_drm_match_table[] = {
>> + { .compatible = "sprd,display-subsystem",},
>> + {},
>> +};
>> +MODULE_DEVICE_TABLE(of, sprd_drm_match_table);
>> +
>> +static struct platform_driver sprd_drm_driver = {
>> + .probe = sprd_drm_probe,
>> + .remove = sprd_drm_remove,
>> + .shutdown = sprd_drm_shutdown,
>> + .driver = {
>> + .name = "sprd-drm-drv",
>> + .of_match_table = sprd_drm_match_table,
>> + },
>> +};
>> +
>> +module_platform_driver(sprd_drm_driver);
>> +
>> +MODULE_AUTHOR("Leon He <leon.he at unisoc.com>");
>> +MODULE_AUTHOR("Kevin Tang <kevin.tang at unisoc.com>");
>> +MODULE_DESCRIPTION("Unisoc DRM KMS Master Driver");
>> +MODULE_LICENSE("GPL v2");
>> diff --git a/drivers/gpu/drm/sprd/sprd_drm.h b/drivers/gpu/drm/sprd/sprd_drm.h
>> new file mode 100644
>> index 0000000..137cb27
>> --- /dev/null
>> +++ b/drivers/gpu/drm/sprd/sprd_drm.h
>> @@ -0,0 +1,16 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * Copyright (C) 2019 Unisoc Inc.
>> + */
>> +
>> +#ifndef _SPRD_DRM_H_
>> +#define _SPRD_DRM_H_
>> +
>> +#include <drm/drm_atomic.h>
>> +#include <drm/drm_print.h>
>> +
>> +struct sprd_drm {
>> + struct drm_device *drm;
>> +};
>> +
>> +#endif /* _SPRD_DRM_H_ */
>> diff --git a/drivers/gpu/drm/sprd/sprd_gem.c b/drivers/gpu/drm/sprd/sprd_gem.c
>> new file mode 100644
>> index 0000000..9aec78e
>> --- /dev/null
>> +++ b/drivers/gpu/drm/sprd/sprd_gem.c
>> @@ -0,0 +1,178 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (C) 2019 Unisoc Inc.
>> + */
>> +
>> +#include <linux/dma-buf.h>
>> +#include <linux/pm_runtime.h>
>> +
>> +#include <drm/drm_prime.h>
>> +
>> +#include "sprd_drm.h"
>> +#include "sprd_gem.h"
>> +
>> +static struct sprd_gem_obj *sprd_gem_obj_create(struct drm_device *drm,
>> + unsigned long size)
>> +{
>> + struct sprd_gem_obj *sprd_gem;
>> + int ret;
>> +
>> + sprd_gem = kzalloc(sizeof(*sprd_gem), GFP_KERNEL);
>> + if (!sprd_gem)
>> + return ERR_PTR(-ENOMEM);
>> +
>> + ret = drm_gem_object_init(drm, &sprd_gem->base, size);
>> + if (ret < 0) {
>> + DRM_ERROR("failed to initialize gem object\n");
>> + goto error;
>> + }
>> +
>> + ret = drm_gem_create_mmap_offset(&sprd_gem->base);
>> + if (ret) {
>> + drm_gem_object_release(&sprd_gem->base);
>> + goto error;
>> + }
>> +
>> + return sprd_gem;
>> +
>> +error:
>> + kfree(sprd_gem);
>> + return ERR_PTR(ret);
>> +}
>> +
>> +void sprd_gem_free_object(struct drm_gem_object *obj)
>> +{
>> + struct sprd_gem_obj *sprd_gem = to_sprd_gem_obj(obj);
>> +
>> + DRM_DEBUG("gem = %p\n", obj);
>> +
>> + if (sprd_gem->vaddr)
>> + dma_free_wc(obj->dev->dev, obj->size,
>> + sprd_gem->vaddr, sprd_gem->dma_addr);
>> + else if (sprd_gem->sgtb)
>> + drm_prime_gem_destroy(obj, sprd_gem->sgtb);
>> +
>> + drm_gem_object_release(obj);
>> +
>> + kfree(sprd_gem);
>> +}
>> +
>> +int sprd_gem_dumb_create(struct drm_file *file_priv, struct drm_device *drm,
>> + struct drm_mode_create_dumb *args)
>> +{
>> + struct sprd_gem_obj *sprd_gem;
>> + int ret;
>> +
>> + args->pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
>> + args->size = round_up(args->pitch * args->height, PAGE_SIZE);
>> +
>> + sprd_gem = sprd_gem_obj_create(drm, args->size);
>> + if (IS_ERR(sprd_gem))
>> + return PTR_ERR(sprd_gem);
>> +
>> + sprd_gem->vaddr = dma_alloc_wc(drm->dev, args->size,
>> + &sprd_gem->dma_addr, GFP_KERNEL | __GFP_NOWARN | GFP_DMA);
>
> I might be missing something, but I still don't understand why all this
> GEM code is necessary. I quickly compared with the CMA helpers and the
> only meaningful difference is the use of the GFP_DMA flag.
>
> Rather than duplicating the CMA code, it's better to change the CMA
> helpers to provide a way of setting this flag.
Further looking at the implementation of dma_alloc_wc(), the GFP_DMA
flags get cleared unconditionally. [1]
Best regards
Thomas
[1] https://elixir.bootlin.com/linux/latest/source/kernel/dma/mapping.c#L295
>
> Best regards
> Thomas
>
>> + if (!sprd_gem->vaddr) {
>> + DRM_ERROR("failed to allocate buffer with size %llu\n",
>> + args->size);
>> + ret = -ENOMEM;
>> + goto error;
>> + }
>> +
>> + ret = drm_gem_handle_create(file_priv, &sprd_gem->base, &args->handle);
>> + if (ret)
>> + goto error;
>> +
>> + drm_gem_object_put_unlocked(&sprd_gem->base);
>> +
>> + return 0;
>> +
>> +error:
>> + sprd_gem_free_object(&sprd_gem->base);
>> + return ret;
>> +}
>> +
>> +static int sprd_gem_object_mmap(struct drm_gem_object *obj,
>> + struct vm_area_struct *vma)
>> +
>> +{
>> + int ret;
>> + struct sprd_gem_obj *sprd_gem = to_sprd_gem_obj(obj);
>> +
>> + vma->vm_flags &= ~VM_PFNMAP;
>> + vma->vm_pgoff = 0;
>> +
>> + ret = dma_mmap_wc(obj->dev->dev, vma,
>> + sprd_gem->vaddr, sprd_gem->dma_addr,
>> + vma->vm_end - vma->vm_start);
>> + if (ret)
>> + drm_gem_vm_close(vma);
>> +
>> + return ret;
>> +}
>> +
>> +int sprd_gem_mmap(struct file *filp, struct vm_area_struct *vma)
>> +{
>> + struct drm_gem_object *obj;
>> + int ret;
>> +
>> + ret = drm_gem_mmap(filp, vma);
>> + if (ret)
>> + return ret;
>> +
>> + obj = vma->vm_private_data;
>> +
>> + return sprd_gem_object_mmap(obj, vma);
>> +}
>> +
>> +int sprd_gem_prime_mmap(struct drm_gem_object *obj,
>> + struct vm_area_struct *vma)
>> +{
>> + int ret;
>> +
>> + ret = drm_gem_mmap_obj(obj, obj->size, vma);
>> + if (ret)
>> + return ret;
>> +
>> + return sprd_gem_object_mmap(obj, vma);
>> +}
>> +
>> +struct sg_table *sprd_gem_prime_get_sg_table(struct drm_gem_object *obj)
>> +{
>> + struct sprd_gem_obj *sprd_gem = to_sprd_gem_obj(obj);
>> + struct sg_table *sgtb;
>> + int ret;
>> +
>> + sgtb = kzalloc(sizeof(*sgtb), GFP_KERNEL);
>> + if (!sgtb)
>> + return ERR_PTR(-ENOMEM);
>> +
>> + ret = dma_get_sgtable(obj->dev->dev, sgtb, sprd_gem->vaddr,
>> + sprd_gem->dma_addr, obj->size);
>> + if (ret) {
>> + DRM_ERROR("failed to allocate sg_table, %d\n", ret);
>> + kfree(sgtb);
>> + return ERR_PTR(ret);
>> + }
>> +
>> + return sgtb;
>> +}
>> +
>> +struct drm_gem_object *sprd_gem_prime_import_sg_table(struct drm_device *drm,
>> + struct dma_buf_attachment *attach, struct sg_table *sgtb)
>> +{
>> + struct sprd_gem_obj *sprd_gem;
>> +
>> + sprd_gem = sprd_gem_obj_create(drm, attach->dmabuf->size);
>> + if (IS_ERR(sprd_gem))
>> + return ERR_CAST(sprd_gem);
>> +
>> + DRM_DEBUG("gem = %p\n", &sprd_gem->base);
>> +
>> + if (sgtb->nents == 1)
>> + sprd_gem->dma_addr = sg_dma_address(sgtb->sgl);
>> +
>> + sprd_gem->sgtb = sgtb;
>> +
>> + return &sprd_gem->base;
>> +}
>> diff --git a/drivers/gpu/drm/sprd/sprd_gem.h b/drivers/gpu/drm/sprd/sprd_gem.h
>> new file mode 100644
>> index 0000000..b6740bd
>> --- /dev/null
>> +++ b/drivers/gpu/drm/sprd/sprd_gem.h
>> @@ -0,0 +1,30 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * Copyright (C) 2019 Unisoc Inc.
>> + */
>> +
>> +#ifndef _SPRD_GEM_H_
>> +#define _SPRD_GEM_H_
>> +
>> +#include <drm/drm_gem.h>
>> +
>> +struct sprd_gem_obj {
>> + struct drm_gem_object base;
>> + dma_addr_t dma_addr;
>> + struct sg_table *sgtb;
>> + void *vaddr;
>> +};
>> +
>> +#define to_sprd_gem_obj(x) container_of(x, struct sprd_gem_obj, base)
>> +
>> +void sprd_gem_free_object(struct drm_gem_object *gem);
>> +int sprd_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
>> + struct drm_mode_create_dumb *args);
>> +int sprd_gem_mmap(struct file *filp, struct vm_area_struct *vma);
>> +int sprd_gem_prime_mmap(struct drm_gem_object *obj,
>> + struct vm_area_struct *vma);
>> +struct sg_table *sprd_gem_prime_get_sg_table(struct drm_gem_object *obj);
>> +struct drm_gem_object *sprd_gem_prime_import_sg_table(struct drm_device *dev,
>> + struct dma_buf_attachment *attach, struct sg_table *sgtb);
>> +
>> +#endif
>>
>
>
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--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer
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