Commit fa201ac2 authored by Noralf Trønnes's avatar Noralf Trønnes

drm: Add DRM support for tiny LCD displays

tinydrm provides helpers for very simple displays that can use
CMA backed framebuffers and need flushing on changes.
Signed-off-by: default avatarNoralf Trønnes <noralf@tronnes.org>
Acked-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: default avatarThierry Reding <treding@nvidia.com>
parent 9ca70356
...@@ -11,6 +11,7 @@ Linux GPU Driver Developer's Guide ...@@ -11,6 +11,7 @@ Linux GPU Driver Developer's Guide
drm-kms-helpers drm-kms-helpers
drm-uapi drm-uapi
i915 i915
tinydrm
vga-switcheroo vga-switcheroo
vgaarbiter vgaarbiter
......
==========================
drm/tinydrm Driver library
==========================
.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-core.c
:doc: overview
Core functionality
==================
.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-core.c
:doc: core
.. kernel-doc:: include/drm/tinydrm/tinydrm.h
:internal:
.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-core.c
:export:
.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c
:export:
...@@ -263,6 +263,8 @@ source "drivers/gpu/drm/mxsfb/Kconfig" ...@@ -263,6 +263,8 @@ source "drivers/gpu/drm/mxsfb/Kconfig"
source "drivers/gpu/drm/meson/Kconfig" source "drivers/gpu/drm/meson/Kconfig"
source "drivers/gpu/drm/tinydrm/Kconfig"
# Keep legacy drivers last # Keep legacy drivers last
menuconfig DRM_LEGACY menuconfig DRM_LEGACY
......
...@@ -94,3 +94,4 @@ obj-$(CONFIG_DRM_ARCPGU)+= arc/ ...@@ -94,3 +94,4 @@ obj-$(CONFIG_DRM_ARCPGU)+= arc/
obj-y += hisilicon/ obj-y += hisilicon/
obj-$(CONFIG_DRM_ZTE) += zte/ obj-$(CONFIG_DRM_ZTE) += zte/
obj-$(CONFIG_DRM_MXSFB) += mxsfb/ obj-$(CONFIG_DRM_MXSFB) += mxsfb/
obj-$(CONFIG_DRM_TINYDRM) += tinydrm/
menuconfig DRM_TINYDRM
tristate "Support for simple displays"
depends on DRM
select DRM_KMS_HELPER
select DRM_KMS_CMA_HELPER
help
Choose this option if you have a tinydrm supported display.
If M is selected the module will be called tinydrm.
obj-$(CONFIG_DRM_TINYDRM) += core/
tinydrm-y := tinydrm-core.o tinydrm-pipe.o
obj-$(CONFIG_DRM_TINYDRM) += tinydrm.o
/*
* Copyright (C) 2016 Noralf Trønnes
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/tinydrm/tinydrm.h>
#include <linux/device.h>
#include <linux/dma-buf.h>
/**
* DOC: overview
*
* This library provides driver helpers for very simple display hardware.
*
* It is based on &drm_simple_display_pipe coupled with a &drm_connector which
* has only one fixed &drm_display_mode. The framebuffers are backed by the
* cma helper and have support for framebuffer flushing (dirty).
* fbdev support is also included.
*
*/
/**
* DOC: core
*
* The driver allocates &tinydrm_device, initializes it using
* devm_tinydrm_init(), sets up the pipeline using tinydrm_display_pipe_init()
* and registers the DRM device using devm_tinydrm_register().
*/
/**
* tinydrm_lastclose - DRM lastclose helper
* @drm: DRM device
*
* This function ensures that fbdev is restored when drm_lastclose() is called
* on the last drm_release(). Drivers can use this as their
* &drm_driver->lastclose callback.
*/
void tinydrm_lastclose(struct drm_device *drm)
{
struct tinydrm_device *tdev = drm->dev_private;
DRM_DEBUG_KMS("\n");
drm_fbdev_cma_restore_mode(tdev->fbdev_cma);
}
EXPORT_SYMBOL(tinydrm_lastclose);
/**
* tinydrm_gem_cma_prime_import_sg_table - Produce a CMA GEM object from
* another driver's scatter/gather table of pinned pages
* @drm: DRM device to import into
* @attach: DMA-BUF attachment
* @sgt: Scatter/gather table of pinned pages
*
* This function imports a scatter/gather table exported via DMA-BUF by
* another driver using drm_gem_cma_prime_import_sg_table(). It sets the
* kernel virtual address on the CMA object. Drivers should use this as their
* &drm_driver->gem_prime_import_sg_table callback if they need the virtual
* address. tinydrm_gem_cma_free_object() should be used in combination with
* this function.
*
* Returns:
* A pointer to a newly created GEM object or an ERR_PTR-encoded negative
* error code on failure.
*/
struct drm_gem_object *
tinydrm_gem_cma_prime_import_sg_table(struct drm_device *drm,
struct dma_buf_attachment *attach,
struct sg_table *sgt)
{
struct drm_gem_cma_object *cma_obj;
struct drm_gem_object *obj;
void *vaddr;
vaddr = dma_buf_vmap(attach->dmabuf);
if (!vaddr) {
DRM_ERROR("Failed to vmap PRIME buffer\n");
return ERR_PTR(-ENOMEM);
}
obj = drm_gem_cma_prime_import_sg_table(drm, attach, sgt);
if (IS_ERR(obj)) {
dma_buf_vunmap(attach->dmabuf, vaddr);
return obj;
}
cma_obj = to_drm_gem_cma_obj(obj);
cma_obj->vaddr = vaddr;
return obj;
}
EXPORT_SYMBOL(tinydrm_gem_cma_prime_import_sg_table);
/**
* tinydrm_gem_cma_free_object - Free resources associated with a CMA GEM
* object
* @gem_obj: GEM object to free
*
* This function frees the backing memory of the CMA GEM object, cleans up the
* GEM object state and frees the memory used to store the object itself using
* drm_gem_cma_free_object(). It also handles PRIME buffers which has the kernel
* virtual address set by tinydrm_gem_cma_prime_import_sg_table(). Drivers
* can use this as their &drm_driver->gem_free_object callback.
*/
void tinydrm_gem_cma_free_object(struct drm_gem_object *gem_obj)
{
if (gem_obj->import_attach) {
struct drm_gem_cma_object *cma_obj;
cma_obj = to_drm_gem_cma_obj(gem_obj);
dma_buf_vunmap(gem_obj->import_attach->dmabuf, cma_obj->vaddr);
cma_obj->vaddr = NULL;
}
drm_gem_cma_free_object(gem_obj);
}
EXPORT_SYMBOL_GPL(tinydrm_gem_cma_free_object);
const struct file_operations tinydrm_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,
};
EXPORT_SYMBOL(tinydrm_fops);
static struct drm_framebuffer *
tinydrm_fb_create(struct drm_device *drm, struct drm_file *file_priv,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
struct tinydrm_device *tdev = drm->dev_private;
return drm_fb_cma_create_with_funcs(drm, file_priv, mode_cmd,
tdev->fb_funcs);
}
static const struct drm_mode_config_funcs tinydrm_mode_config_funcs = {
.fb_create = tinydrm_fb_create,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
static int tinydrm_init(struct device *parent, struct tinydrm_device *tdev,
const struct drm_framebuffer_funcs *fb_funcs,
struct drm_driver *driver)
{
struct drm_device *drm;
mutex_init(&tdev->dirty_lock);
tdev->fb_funcs = fb_funcs;
/*
* We don't embed drm_device, because that prevent us from using
* devm_kzalloc() to allocate tinydrm_device in the driver since
* drm_dev_unref() frees the structure. The devm_ functions provide
* for easy error handling.
*/
drm = drm_dev_alloc(driver, parent);
if (IS_ERR(drm))
return PTR_ERR(drm);
tdev->drm = drm;
drm->dev_private = tdev;
drm_mode_config_init(drm);
drm->mode_config.funcs = &tinydrm_mode_config_funcs;
return 0;
}
static void tinydrm_fini(struct tinydrm_device *tdev)
{
drm_mode_config_cleanup(tdev->drm);
mutex_destroy(&tdev->dirty_lock);
tdev->drm->dev_private = NULL;
drm_dev_unref(tdev->drm);
}
static void devm_tinydrm_release(void *data)
{
tinydrm_fini(data);
}
/**
* devm_tinydrm_init - Initialize tinydrm device
* @parent: Parent device object
* @tdev: tinydrm device
* @fb_funcs: Framebuffer functions
* @driver: DRM driver
*
* This function initializes @tdev, the underlying DRM device and it's
* mode_config. Resources will be automatically freed on driver detach (devres)
* using drm_mode_config_cleanup() and drm_dev_unref().
*
* Returns:
* Zero on success, negative error code on failure.
*/
int devm_tinydrm_init(struct device *parent, struct tinydrm_device *tdev,
const struct drm_framebuffer_funcs *fb_funcs,
struct drm_driver *driver)
{
int ret;
ret = tinydrm_init(parent, tdev, fb_funcs, driver);
if (ret)
return ret;
ret = devm_add_action(parent, devm_tinydrm_release, tdev);
if (ret)
tinydrm_fini(tdev);
return ret;
}
EXPORT_SYMBOL(devm_tinydrm_init);
static int tinydrm_register(struct tinydrm_device *tdev)
{
struct drm_device *drm = tdev->drm;
int bpp = drm->mode_config.preferred_depth;
struct drm_fbdev_cma *fbdev;
int ret;
ret = drm_dev_register(tdev->drm, 0);
if (ret)
return ret;
fbdev = drm_fbdev_cma_init_with_funcs(drm, bpp ? bpp : 32,
drm->mode_config.num_connector,
tdev->fb_funcs);
if (IS_ERR(fbdev))
DRM_ERROR("Failed to initialize fbdev: %ld\n", PTR_ERR(fbdev));
else
tdev->fbdev_cma = fbdev;
return 0;
}
static void tinydrm_unregister(struct tinydrm_device *tdev)
{
struct drm_fbdev_cma *fbdev_cma = tdev->fbdev_cma;
drm_crtc_force_disable_all(tdev->drm);
/* don't restore fbdev in lastclose, keep pipeline disabled */
tdev->fbdev_cma = NULL;
drm_dev_unregister(tdev->drm);
if (fbdev_cma)
drm_fbdev_cma_fini(fbdev_cma);
}
static void devm_tinydrm_register_release(void *data)
{
tinydrm_unregister(data);
}
/**
* devm_tinydrm_register - Register tinydrm device
* @tdev: tinydrm device
*
* This function registers the underlying DRM device and fbdev.
* These resources will be automatically unregistered on driver detach (devres)
* and the display pipeline will be disabled.
*
* Returns:
* Zero on success, negative error code on failure.
*/
int devm_tinydrm_register(struct tinydrm_device *tdev)
{
struct device *dev = tdev->drm->dev;
int ret;
ret = tinydrm_register(tdev);
if (ret)
return ret;
ret = devm_add_action(dev, devm_tinydrm_register_release, tdev);
if (ret)
tinydrm_unregister(tdev);
return ret;
}
EXPORT_SYMBOL(devm_tinydrm_register);
/**
* tinydrm_shutdown - Shutdown tinydrm
* @tdev: tinydrm device
*
* This function makes sure that the display pipeline is disabled.
* Used by drivers in their shutdown callback to turn off the display
* on machine shutdown and reboot.
*/
void tinydrm_shutdown(struct tinydrm_device *tdev)
{
drm_crtc_force_disable_all(tdev->drm);
}
EXPORT_SYMBOL(tinydrm_shutdown);
/**
* tinydrm_suspend - Suspend tinydrm
* @tdev: tinydrm device
*
* Used in driver PM operations to suspend tinydrm.
* Suspends fbdev and DRM.
* Resume with tinydrm_resume().
*
* Returns:
* Zero on success, negative error code on failure.
*/
int tinydrm_suspend(struct tinydrm_device *tdev)
{
struct drm_atomic_state *state;
if (tdev->suspend_state) {
DRM_ERROR("Failed to suspend: state already set\n");
return -EINVAL;
}
drm_fbdev_cma_set_suspend_unlocked(tdev->fbdev_cma, 1);
state = drm_atomic_helper_suspend(tdev->drm);
if (IS_ERR(state)) {
drm_fbdev_cma_set_suspend_unlocked(tdev->fbdev_cma, 0);
return PTR_ERR(state);
}
tdev->suspend_state = state;
return 0;
}
EXPORT_SYMBOL(tinydrm_suspend);
/**
* tinydrm_resume - Resume tinydrm
* @tdev: tinydrm device
*
* Used in driver PM operations to resume tinydrm.
* Suspend with tinydrm_suspend().
*
* Returns:
* Zero on success, negative error code on failure.
*/
int tinydrm_resume(struct tinydrm_device *tdev)
{
struct drm_atomic_state *state = tdev->suspend_state;
int ret;
if (!state) {
DRM_ERROR("Failed to resume: state is not set\n");
return -EINVAL;
}
tdev->suspend_state = NULL;
ret = drm_atomic_helper_resume(tdev->drm, state);
if (ret) {
DRM_ERROR("Error resuming state: %d\n", ret);
return ret;
}
drm_fbdev_cma_set_suspend_unlocked(tdev->fbdev_cma, 0);
return 0;
}
EXPORT_SYMBOL(tinydrm_resume);
MODULE_LICENSE("GPL");
/*
* Copyright (C) 2016 Noralf Trønnes
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_modes.h>
#include <drm/tinydrm/tinydrm.h>
struct tinydrm_connector {
struct drm_connector base;
const struct drm_display_mode *mode;
};
static inline struct tinydrm_connector *
to_tinydrm_connector(struct drm_connector *connector)
{
return container_of(connector, struct tinydrm_connector, base);
}
static int tinydrm_connector_get_modes(struct drm_connector *connector)
{
struct tinydrm_connector *tconn = to_tinydrm_connector(connector);
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, tconn->mode);
if (!mode) {
DRM_ERROR("Failed to duplicate mode\n");
return 0;
}
if (mode->name[0] == '\0')
drm_mode_set_name(mode);
mode->type |= DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
if (mode->width_mm) {
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
}
return 1;
}
static const struct drm_connector_helper_funcs tinydrm_connector_hfuncs = {
.get_modes = tinydrm_connector_get_modes,
.best_encoder = drm_atomic_helper_best_encoder,
};
static enum drm_connector_status
tinydrm_connector_detect(struct drm_connector *connector, bool force)
{
if (drm_device_is_unplugged(connector->dev))
return connector_status_disconnected;
return connector->status;
}
static void tinydrm_connector_destroy(struct drm_connector *connector)
{
struct tinydrm_connector *tconn = to_tinydrm_connector(connector);
drm_connector_cleanup(connector);
kfree(tconn);
}
static const struct drm_connector_funcs tinydrm_connector_funcs = {
.dpms = drm_atomic_helper_connector_dpms,
.reset = drm_atomic_helper_connector_reset,
.detect = tinydrm_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = tinydrm_connector_destroy,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
struct drm_connector *
tinydrm_connector_create(struct drm_device *drm,
const struct drm_display_mode *mode,
int connector_type)
{
struct tinydrm_connector *tconn;
struct drm_connector *connector;
int ret;
tconn = kzalloc(sizeof(*tconn), GFP_KERNEL);
if (!tconn)
return ERR_PTR(-ENOMEM);
tconn->mode = mode;
connector = &tconn->base;
drm_connector_helper_add(connector, &tinydrm_connector_hfuncs);
ret = drm_connector_init(drm, connector, &tinydrm_connector_funcs,
connector_type);
if (ret) {
kfree(tconn);
return ERR_PTR(ret);
}
connector->status = connector_status_connected;
return connector;
}
/**
* tinydrm_display_pipe_update - Display pipe update helper
* @pipe: Simple display pipe
* @old_state: Old plane state
*
* This function does a full framebuffer flush if the plane framebuffer
* has changed. It also handles vblank events. Drivers can use this as their
* &drm_simple_display_pipe_funcs->update callback.
*/
void tinydrm_display_pipe_update(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *old_state)
{
struct tinydrm_device *tdev = pipe_to_tinydrm(pipe);
struct drm_framebuffer *fb = pipe->plane.state->fb;
struct drm_crtc *crtc = &tdev->pipe.crtc;
if (fb && (fb != old_state->fb)) {
pipe->plane.fb = fb;
if (fb->funcs->dirty)
fb->funcs->dirty(fb, NULL, 0, 0, NULL, 0);
}
if (crtc->state->event) {
spin_lock_irq(&crtc->dev->event_lock);
drm_crtc_send_vblank_event(crtc, crtc->state->event);
spin_unlock_irq(&crtc->dev->event_lock);
crtc->state->event = NULL;
}
}
EXPORT_SYMBOL(tinydrm_display_pipe_update);
/**
* tinydrm_display_pipe_prepare_fb - Display pipe prepare_fb helper
* @pipe: Simple display pipe
* @plane_state: Plane state
*
* This function uses drm_fb_cma_prepare_fb() to check if the plane FB has an
* dma-buf attached, extracts the exclusive fence and attaches it to plane
* state for the atomic helper to wait on. Drivers can use this as their
* &drm_simple_display_pipe_funcs->prepare_fb callback.
*/
int tinydrm_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *plane_state)
{
return drm_fb_cma_prepare_fb(&pipe->plane, plane_state);
}
EXPORT_SYMBOL(tinydrm_display_pipe_prepare_fb);
static int tinydrm_rotate_mode(struct drm_display_mode *mode,
unsigned int rotation)
{
if (rotation == 0 || rotation == 180) {
return 0;
} else if (rotation == 90 || rotation == 270) {
swap(mode->hdisplay, mode->vdisplay);
swap(mode->hsync_start, mode->vsync_start);
swap(mode->hsync_end, mode->vsync_end);
swap(mode->htotal, mode->vtotal);
swap(mode->width_mm, mode->height_mm);
return 0;
} else {
return -EINVAL;
}
}
/**
* tinydrm_display_pipe_init - Initialize display pipe
* @tdev: tinydrm device
* @funcs: Display pipe functions
* @connector_type: Connector type
* @formats: Array of supported formats (DRM_FORMAT\_\*)
* @format_count: Number of elements in @formats
* @mode: Supported mode
* @rotation: Initial @mode rotation in degrees Counter Clock Wise
*
* This function sets up a &drm_simple_display_pipe with a &drm_connector that
* has one fixed &drm_display_mode which is rotated according to @rotation.
*
* Returns:
* Zero on success, negative error code on failure.
*/
int
tinydrm_display_pipe_init(struct tinydrm_device *tdev,
const struct drm_simple_display_pipe_funcs *funcs,
int connector_type,
const uint32_t *formats,
unsigned int format_count,
const struct drm_display_mode *mode,
unsigned int rotation)
{
struct drm_device *drm = tdev->drm;
struct drm_display_mode *mode_copy;
struct drm_connector *connector;
int ret;
mode_copy = devm_kmalloc(drm->dev, sizeof(*mode_copy), GFP_KERNEL);
if (!mode_copy)
return -ENOMEM;
*mode_copy = *mode;
ret = tinydrm_rotate_mode(mode_copy, rotation);
if (ret) {
DRM_ERROR("Illegal rotation value %u\n", rotation);
return -EINVAL;
}
drm->mode_config.min_width = mode_copy->hdisplay;
drm->mode_config.max_width = mode_copy->hdisplay;
drm->mode_config.min_height = mode_copy->vdisplay;
drm->mode_config.max_height = mode_copy->vdisplay;
connector = tinydrm_connector_create(drm, mode_copy, connector_type);
if (IS_ERR(connector))
return PTR_ERR(connector);
ret = drm_simple_display_pipe_init(drm, &tdev->pipe, funcs, formats,
format_count, connector);
if (ret)
return ret;
return 0;
}
EXPORT_SYMBOL(tinydrm_display_pipe_init);
/*
* Copyright (C) 2016 Noralf Trønnes
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __LINUX_TINYDRM_H
#define __LINUX_TINYDRM_H
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_simple_kms_helper.h>
/**
* struct tinydrm_device - tinydrm device
* @drm: DRM device
* @pipe: Display pipe structure
* @dirty_lock: Serializes framebuffer flushing
* @fbdev_cma: CMA fbdev structure
* @suspend_state: Atomic state when suspended
* @fb_funcs: Framebuffer functions used when creating framebuffers
*/
struct tinydrm_device {
struct drm_device *drm;
struct drm_simple_display_pipe pipe;
struct mutex dirty_lock;
struct drm_fbdev_cma *fbdev_cma;
struct drm_atomic_state *suspend_state;
const struct drm_framebuffer_funcs *fb_funcs;
};
static inline struct tinydrm_device *
pipe_to_tinydrm(struct drm_simple_display_pipe *pipe)
{
return container_of(pipe, struct tinydrm_device, pipe);
}
/**
* TINYDRM_GEM_DRIVER_OPS - default tinydrm gem operations
*
* This macro provides a shortcut for setting the tinydrm GEM operations in
* the &drm_driver structure.
*/
#define TINYDRM_GEM_DRIVER_OPS \
.gem_free_object = tinydrm_gem_cma_free_object, \
.gem_vm_ops = &drm_gem_cma_vm_ops, \
.prime_handle_to_fd = drm_gem_prime_handle_to_fd, \
.prime_fd_to_handle = drm_gem_prime_fd_to_handle, \
.gem_prime_import = drm_gem_prime_import, \
.gem_prime_export = drm_gem_prime_export, \
.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, \
.gem_prime_import_sg_table = tinydrm_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, \
.dumb_create = drm_gem_cma_dumb_create, \
.dumb_map_offset = drm_gem_cma_dumb_map_offset, \
.dumb_destroy = drm_gem_dumb_destroy, \
.fops = &tinydrm_fops
/**
* TINYDRM_MODE - tinydrm display mode
* @hd: Horizontal resolution, width
* @vd: Vertical resolution, height
* @hd_mm: Display width in millimeters
* @vd_mm: Display height in millimeters
*
* This macro creates a &drm_display_mode for use with tinydrm.
*/
#define TINYDRM_MODE(hd, vd, hd_mm, vd_mm) \
.hdisplay = (hd), \
.hsync_start = (hd), \
.hsync_end = (hd), \
.htotal = (hd), \
.vdisplay = (vd), \
.vsync_start = (vd), \
.vsync_end = (vd), \
.vtotal = (vd), \
.width_mm = (hd_mm), \
.height_mm = (vd_mm), \
.type = DRM_MODE_TYPE_DRIVER, \
.clock = 1 /* pass validation */
extern const struct file_operations tinydrm_fops;
void tinydrm_lastclose(struct drm_device *drm);
void tinydrm_gem_cma_free_object(struct drm_gem_object *gem_obj);
struct drm_gem_object *
tinydrm_gem_cma_prime_import_sg_table(struct drm_device *drm,
struct dma_buf_attachment *attach,
struct sg_table *sgt);
int devm_tinydrm_init(struct device *parent, struct tinydrm_device *tdev,
const struct drm_framebuffer_funcs *fb_funcs,
struct drm_driver *driver);
int devm_tinydrm_register(struct tinydrm_device *tdev);
void tinydrm_shutdown(struct tinydrm_device *tdev);
int tinydrm_suspend(struct tinydrm_device *tdev);
int tinydrm_resume(struct tinydrm_device *tdev);
void tinydrm_display_pipe_update(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *old_state);
int tinydrm_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *plane_state);
int
tinydrm_display_pipe_init(struct tinydrm_device *tdev,
const struct drm_simple_display_pipe_funcs *funcs,
int connector_type,
const uint32_t *formats,
unsigned int format_count,
const struct drm_display_mode *mode,
unsigned int rotation);
#endif /* __LINUX_TINYDRM_H */
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