blob: 4483d47f739525a19faed977860a3e8daf931aab [file] [log] [blame]
/*
* Freescale i.MX drm driver
*
* Copyright (C) 2011 Sascha Hauer, Pengutronix
*
* 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.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/device.h>
#include <linux/platform_device.h>
#include <drm/drmP.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
#include <linux/fb.h>
#include <linux/module.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include "imx-drm.h"
#define MAX_CRTC 4
struct crtc_cookie {
void *cookie;
int id;
struct list_head list;
};
struct imx_drm_device {
struct drm_device *drm;
struct device *dev;
struct list_head crtc_list;
struct list_head encoder_list;
struct list_head connector_list;
struct mutex mutex;
int pipes;
struct drm_fbdev_cma *fbhelper;
};
struct imx_drm_crtc {
struct drm_crtc *crtc;
struct list_head list;
struct imx_drm_device *imxdrm;
int pipe;
struct imx_drm_crtc_helper_funcs imx_drm_helper_funcs;
struct module *owner;
struct crtc_cookie cookie;
};
struct imx_drm_encoder {
struct drm_encoder *encoder;
struct list_head list;
struct module *owner;
struct list_head possible_crtcs;
};
struct imx_drm_connector {
struct drm_connector *connector;
struct list_head list;
struct module *owner;
};
int imx_drm_crtc_id(struct imx_drm_crtc *crtc)
{
return crtc->pipe;
}
static void imx_drm_driver_lastclose(struct drm_device *drm)
{
struct imx_drm_device *imxdrm = drm->dev_private;
if (imxdrm->fbhelper)
drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
}
static int imx_drm_driver_unload(struct drm_device *drm)
{
struct imx_drm_device *imxdrm = drm->dev_private;
imx_drm_device_put();
drm_mode_config_cleanup(imxdrm->drm);
drm_kms_helper_poll_fini(imxdrm->drm);
return 0;
}
/*
* We don't care at all for crtc numbers, but the core expects the
* crtcs to be numbered
*/
static struct imx_drm_crtc *imx_drm_crtc_by_num(struct imx_drm_device *imxdrm,
int num)
{
struct imx_drm_crtc *imx_drm_crtc;
list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list)
if (imx_drm_crtc->pipe == num)
return imx_drm_crtc;
return NULL;
}
int imx_drm_crtc_panel_format_pins(struct drm_crtc *crtc, u32 encoder_type,
u32 interface_pix_fmt, int hsync_pin, int vsync_pin)
{
struct imx_drm_device *imxdrm = crtc->dev->dev_private;
struct imx_drm_crtc *imx_crtc;
struct imx_drm_crtc_helper_funcs *helper;
list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list)
if (imx_crtc->crtc == crtc)
goto found;
return -EINVAL;
found:
helper = &imx_crtc->imx_drm_helper_funcs;
if (helper->set_interface_pix_fmt)
return helper->set_interface_pix_fmt(crtc,
encoder_type, interface_pix_fmt,
hsync_pin, vsync_pin);
return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_crtc_panel_format_pins);
int imx_drm_crtc_panel_format(struct drm_crtc *crtc, u32 encoder_type,
u32 interface_pix_fmt)
{
return imx_drm_crtc_panel_format_pins(crtc, encoder_type,
interface_pix_fmt, 2, 3);
}
EXPORT_SYMBOL_GPL(imx_drm_crtc_panel_format);
int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
{
return drm_vblank_get(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
}
EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);
void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
{
drm_vblank_put(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
}
EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);
void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
{
drm_handle_vblank(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
}
EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);
static int imx_drm_enable_vblank(struct drm_device *drm, int crtc)
{
struct imx_drm_device *imxdrm = drm->dev_private;
struct imx_drm_crtc *imx_drm_crtc;
int ret;
imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc);
if (!imx_drm_crtc)
return -EINVAL;
if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
return -ENOSYS;
ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
imx_drm_crtc->crtc);
return ret;
}
static void imx_drm_disable_vblank(struct drm_device *drm, int crtc)
{
struct imx_drm_device *imxdrm = drm->dev_private;
struct imx_drm_crtc *imx_drm_crtc;
imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc);
if (!imx_drm_crtc)
return;
if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
return;
imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
}
static void imx_drm_driver_preclose(struct drm_device *drm,
struct drm_file *file)
{
int i;
if (!file->is_master)
return;
for (i = 0; i < 4; i++)
imx_drm_disable_vblank(drm , i);
}
static const struct file_operations imx_drm_driver_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
.mmap = drm_gem_cma_mmap,
.poll = drm_poll,
.read = drm_read,
.llseek = noop_llseek,
};
static struct imx_drm_device *imx_drm_device;
static struct imx_drm_device *__imx_drm_device(void)
{
return imx_drm_device;
}
struct drm_device *imx_drm_device_get(void)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
struct imx_drm_encoder *enc;
struct imx_drm_connector *con;
struct imx_drm_crtc *crtc;
list_for_each_entry(enc, &imxdrm->encoder_list, list) {
if (!try_module_get(enc->owner)) {
dev_err(imxdrm->dev, "could not get module %s\n",
module_name(enc->owner));
goto unwind_enc;
}
}
list_for_each_entry(con, &imxdrm->connector_list, list) {
if (!try_module_get(con->owner)) {
dev_err(imxdrm->dev, "could not get module %s\n",
module_name(con->owner));
goto unwind_con;
}
}
list_for_each_entry(crtc, &imxdrm->crtc_list, list) {
if (!try_module_get(crtc->owner)) {
dev_err(imxdrm->dev, "could not get module %s\n",
module_name(crtc->owner));
goto unwind_crtc;
}
}
return imxdrm->drm;
unwind_crtc:
list_for_each_entry_continue_reverse(crtc, &imxdrm->crtc_list, list)
module_put(crtc->owner);
unwind_con:
list_for_each_entry_continue_reverse(con, &imxdrm->connector_list, list)
module_put(con->owner);
unwind_enc:
list_for_each_entry_continue_reverse(enc, &imxdrm->encoder_list, list)
module_put(enc->owner);
mutex_unlock(&imxdrm->mutex);
return NULL;
}
EXPORT_SYMBOL_GPL(imx_drm_device_get);
void imx_drm_device_put(void)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
struct imx_drm_encoder *enc;
struct imx_drm_connector *con;
struct imx_drm_crtc *crtc;
mutex_lock(&imxdrm->mutex);
list_for_each_entry(crtc, &imxdrm->crtc_list, list)
module_put(crtc->owner);
list_for_each_entry(con, &imxdrm->connector_list, list)
module_put(con->owner);
list_for_each_entry(enc, &imxdrm->encoder_list, list)
module_put(enc->owner);
mutex_unlock(&imxdrm->mutex);
}
EXPORT_SYMBOL_GPL(imx_drm_device_put);
static int drm_mode_group_reinit(struct drm_device *dev)
{
struct drm_mode_group *group = &dev->primary->mode_group;
uint32_t *id_list = group->id_list;
int ret;
ret = drm_mode_group_init_legacy_group(dev, group);
if (ret < 0)
return ret;
kfree(id_list);
return 0;
}
/*
* register an encoder to the drm core
*/
static int imx_drm_encoder_register(struct imx_drm_encoder *imx_drm_encoder)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
INIT_LIST_HEAD(&imx_drm_encoder->possible_crtcs);
drm_encoder_init(imxdrm->drm, imx_drm_encoder->encoder,
imx_drm_encoder->encoder->funcs,
imx_drm_encoder->encoder->encoder_type);
drm_mode_group_reinit(imxdrm->drm);
return 0;
}
/*
* unregister an encoder from the drm core
*/
static void imx_drm_encoder_unregister(struct imx_drm_encoder
*imx_drm_encoder)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
drm_encoder_cleanup(imx_drm_encoder->encoder);
drm_mode_group_reinit(imxdrm->drm);
}
/*
* register a connector to the drm core
*/
static int imx_drm_connector_register(
struct imx_drm_connector *imx_drm_connector)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
drm_connector_init(imxdrm->drm, imx_drm_connector->connector,
imx_drm_connector->connector->funcs,
imx_drm_connector->connector->connector_type);
drm_mode_group_reinit(imxdrm->drm);
return drm_sysfs_connector_add(imx_drm_connector->connector);
}
/*
* unregister a connector from the drm core
*/
static void imx_drm_connector_unregister(
struct imx_drm_connector *imx_drm_connector)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
drm_sysfs_connector_remove(imx_drm_connector->connector);
drm_connector_cleanup(imx_drm_connector->connector);
drm_mode_group_reinit(imxdrm->drm);
}
/*
* register a crtc to the drm core
*/
static int imx_drm_crtc_register(struct imx_drm_crtc *imx_drm_crtc)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
int ret;
drm_crtc_init(imxdrm->drm, imx_drm_crtc->crtc,
imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs);
ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256);
if (ret)
return ret;
drm_crtc_helper_add(imx_drm_crtc->crtc,
imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);
drm_mode_group_reinit(imxdrm->drm);
return 0;
}
/*
* Called by the CRTC driver when all CRTCs are registered. This
* puts all the pieces together and initializes the driver.
* Once this is called no more CRTCs can be registered since
* the drm core has hardcoded the number of crtcs in several
* places.
*/
static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
int ret;
imxdrm->drm = drm;
drm->dev_private = imxdrm;
/*
* enable drm irq mode.
* - with irq_enabled = 1, we can use the vblank feature.
*
* P.S. note that we wouldn't use drm irq handler but
* just specific driver own one instead because
* drm framework supports only one irq handler and
* drivers can well take care of their interrupts
*/
drm->irq_enabled = 1;
drm_mode_config_init(drm);
imx_drm_mode_config_init(drm);
mutex_lock(&imxdrm->mutex);
drm_kms_helper_poll_init(imxdrm->drm);
/* setup the grouping for the legacy output */
ret = drm_mode_group_init_legacy_group(imxdrm->drm,
&imxdrm->drm->primary->mode_group);
if (ret)
goto err_init;
ret = drm_vblank_init(imxdrm->drm, MAX_CRTC);
if (ret)
goto err_init;
/*
* with vblank_disable_allowed = 1, vblank interrupt will be disabled
* by drm timer once a current process gives up ownership of
* vblank event.(after drm_vblank_put function is called)
*/
imxdrm->drm->vblank_disable_allowed = 1;
if (!imx_drm_device_get())
ret = -EINVAL;
ret = 0;
err_init:
mutex_unlock(&imxdrm->mutex);
return ret;
}
static void imx_drm_update_possible_crtcs(void)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
struct imx_drm_crtc *imx_drm_crtc;
struct imx_drm_encoder *enc;
struct crtc_cookie *cookie;
list_for_each_entry(enc, &imxdrm->encoder_list, list) {
u32 possible_crtcs = 0;
list_for_each_entry(cookie, &enc->possible_crtcs, list) {
list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list) {
if (imx_drm_crtc->cookie.cookie == cookie->cookie &&
imx_drm_crtc->cookie.id == cookie->id) {
possible_crtcs |= 1 << imx_drm_crtc->pipe;
}
}
}
enc->encoder->possible_crtcs = possible_crtcs;
enc->encoder->possible_clones = possible_crtcs;
}
}
/*
* imx_drm_add_crtc - add a new crtc
*
* The return value if !NULL is a cookie for the caller to pass to
* imx_drm_remove_crtc later.
*/
int imx_drm_add_crtc(struct drm_crtc *crtc,
struct imx_drm_crtc **new_crtc,
const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
struct module *owner, void *cookie, int id)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
struct imx_drm_crtc *imx_drm_crtc;
int ret;
mutex_lock(&imxdrm->mutex);
if (imxdrm->drm->open_count) {
ret = -EBUSY;
goto err_busy;
}
imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
if (!imx_drm_crtc) {
ret = -ENOMEM;
goto err_alloc;
}
imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
imx_drm_crtc->pipe = imxdrm->pipes++;
imx_drm_crtc->cookie.cookie = cookie;
imx_drm_crtc->cookie.id = id;
imx_drm_crtc->crtc = crtc;
imx_drm_crtc->imxdrm = imxdrm;
imx_drm_crtc->owner = owner;
list_add_tail(&imx_drm_crtc->list, &imxdrm->crtc_list);
*new_crtc = imx_drm_crtc;
ret = imx_drm_crtc_register(imx_drm_crtc);
if (ret)
goto err_register;
imx_drm_update_possible_crtcs();
mutex_unlock(&imxdrm->mutex);
return 0;
err_register:
kfree(imx_drm_crtc);
err_alloc:
err_busy:
mutex_unlock(&imxdrm->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
/*
* imx_drm_remove_crtc - remove a crtc
*/
int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
{
struct imx_drm_device *imxdrm = imx_drm_crtc->imxdrm;
mutex_lock(&imxdrm->mutex);
drm_crtc_cleanup(imx_drm_crtc->crtc);
list_del(&imx_drm_crtc->list);
drm_mode_group_reinit(imxdrm->drm);
mutex_unlock(&imxdrm->mutex);
kfree(imx_drm_crtc);
return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
/*
* imx_drm_add_encoder - add a new encoder
*/
int imx_drm_add_encoder(struct drm_encoder *encoder,
struct imx_drm_encoder **newenc, struct module *owner)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
struct imx_drm_encoder *imx_drm_encoder;
int ret;
mutex_lock(&imxdrm->mutex);
if (imxdrm->drm->open_count) {
ret = -EBUSY;
goto err_busy;
}
imx_drm_encoder = kzalloc(sizeof(*imx_drm_encoder), GFP_KERNEL);
if (!imx_drm_encoder) {
ret = -ENOMEM;
goto err_alloc;
}
imx_drm_encoder->encoder = encoder;
imx_drm_encoder->owner = owner;
ret = imx_drm_encoder_register(imx_drm_encoder);
if (ret) {
ret = -ENOMEM;
goto err_register;
}
list_add_tail(&imx_drm_encoder->list, &imxdrm->encoder_list);
*newenc = imx_drm_encoder;
mutex_unlock(&imxdrm->mutex);
return 0;
err_register:
kfree(imx_drm_encoder);
err_alloc:
err_busy:
mutex_unlock(&imxdrm->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(imx_drm_add_encoder);
int imx_drm_encoder_add_possible_crtcs(
struct imx_drm_encoder *imx_drm_encoder,
struct device_node *np)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
struct of_phandle_args args;
struct crtc_cookie *c;
int ret = 0;
int i;
if (!list_empty(&imx_drm_encoder->possible_crtcs))
return -EBUSY;
for (i = 0; !ret; i++) {
ret = of_parse_phandle_with_args(np, "crtcs",
"#crtc-cells", i, &args);
if (ret < 0)
break;
c = kzalloc(sizeof(*c), GFP_KERNEL);
if (!c) {
of_node_put(args.np);
return -ENOMEM;
}
c->cookie = args.np;
c->id = args.args_count > 0 ? args.args[0] : 0;
of_node_put(args.np);
mutex_lock(&imxdrm->mutex);
list_add_tail(&c->list, &imx_drm_encoder->possible_crtcs);
mutex_unlock(&imxdrm->mutex);
}
imx_drm_update_possible_crtcs();
return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_encoder_add_possible_crtcs);
int imx_drm_encoder_get_mux_id(struct imx_drm_encoder *imx_drm_encoder,
struct drm_crtc *crtc)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
struct imx_drm_crtc *imx_crtc;
int i = 0;
list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) {
if (imx_crtc->crtc == crtc)
goto found;
i++;
}
return -EINVAL;
found:
return i;
}
EXPORT_SYMBOL_GPL(imx_drm_encoder_get_mux_id);
/*
* imx_drm_remove_encoder - remove an encoder
*/
int imx_drm_remove_encoder(struct imx_drm_encoder *imx_drm_encoder)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
struct crtc_cookie *c, *tmp;
mutex_lock(&imxdrm->mutex);
imx_drm_encoder_unregister(imx_drm_encoder);
list_del(&imx_drm_encoder->list);
list_for_each_entry_safe(c, tmp, &imx_drm_encoder->possible_crtcs,
list)
kfree(c);
mutex_unlock(&imxdrm->mutex);
kfree(imx_drm_encoder);
return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_remove_encoder);
/*
* imx_drm_add_connector - add a connector
*/
int imx_drm_add_connector(struct drm_connector *connector,
struct imx_drm_connector **new_con,
struct module *owner)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
struct imx_drm_connector *imx_drm_connector;
int ret;
mutex_lock(&imxdrm->mutex);
if (imxdrm->drm->open_count) {
ret = -EBUSY;
goto err_busy;
}
imx_drm_connector = kzalloc(sizeof(*imx_drm_connector), GFP_KERNEL);
if (!imx_drm_connector) {
ret = -ENOMEM;
goto err_alloc;
}
imx_drm_connector->connector = connector;
imx_drm_connector->owner = owner;
ret = imx_drm_connector_register(imx_drm_connector);
if (ret)
goto err_register;
list_add_tail(&imx_drm_connector->list, &imxdrm->connector_list);
*new_con = imx_drm_connector;
mutex_unlock(&imxdrm->mutex);
return 0;
err_register:
kfree(imx_drm_connector);
err_alloc:
err_busy:
mutex_unlock(&imxdrm->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(imx_drm_add_connector);
void imx_drm_fb_helper_set(struct drm_fbdev_cma *fbdev_helper)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
imxdrm->fbhelper = fbdev_helper;
}
EXPORT_SYMBOL_GPL(imx_drm_fb_helper_set);
/*
* imx_drm_remove_connector - remove a connector
*/
int imx_drm_remove_connector(struct imx_drm_connector *imx_drm_connector)
{
struct imx_drm_device *imxdrm = __imx_drm_device();
mutex_lock(&imxdrm->mutex);
imx_drm_connector_unregister(imx_drm_connector);
list_del(&imx_drm_connector->list);
mutex_unlock(&imxdrm->mutex);
kfree(imx_drm_connector);
return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_remove_connector);
static const struct drm_ioctl_desc imx_drm_ioctls[] = {
/* none so far */
};
static struct drm_driver imx_drm_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
.load = imx_drm_driver_load,
.unload = imx_drm_driver_unload,
.lastclose = imx_drm_driver_lastclose,
.preclose = imx_drm_driver_preclose,
.gem_free_object = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.dumb_create = drm_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_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 = 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,
.get_vblank_counter = drm_vblank_count,
.enable_vblank = imx_drm_enable_vblank,
.disable_vblank = imx_drm_disable_vblank,
.ioctls = imx_drm_ioctls,
.num_ioctls = ARRAY_SIZE(imx_drm_ioctls),
.fops = &imx_drm_driver_fops,
.name = "imx-drm",
.desc = "i.MX DRM graphics",
.date = "20120507",
.major = 1,
.minor = 0,
.patchlevel = 0,
};
static int imx_drm_platform_probe(struct platform_device *pdev)
{
imx_drm_device->dev = &pdev->dev;
return drm_platform_init(&imx_drm_driver, pdev);
}
static int imx_drm_platform_remove(struct platform_device *pdev)
{
drm_platform_exit(&imx_drm_driver, pdev);
return 0;
}
static struct platform_driver imx_drm_pdrv = {
.probe = imx_drm_platform_probe,
.remove = imx_drm_platform_remove,
.driver = {
.owner = THIS_MODULE,
.name = "imx-drm",
},
};
static struct platform_device *imx_drm_pdev;
static int __init imx_drm_init(void)
{
int ret;
imx_drm_device = kzalloc(sizeof(*imx_drm_device), GFP_KERNEL);
if (!imx_drm_device)
return -ENOMEM;
mutex_init(&imx_drm_device->mutex);
INIT_LIST_HEAD(&imx_drm_device->crtc_list);
INIT_LIST_HEAD(&imx_drm_device->connector_list);
INIT_LIST_HEAD(&imx_drm_device->encoder_list);
imx_drm_pdev = platform_device_register_simple("imx-drm", -1, NULL, 0);
if (IS_ERR(imx_drm_pdev)) {
ret = PTR_ERR(imx_drm_pdev);
goto err_pdev;
}
imx_drm_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32),
ret = platform_driver_register(&imx_drm_pdrv);
if (ret)
goto err_pdrv;
return 0;
err_pdrv:
platform_device_unregister(imx_drm_pdev);
err_pdev:
kfree(imx_drm_device);
return ret;
}
static void __exit imx_drm_exit(void)
{
platform_device_unregister(imx_drm_pdev);
platform_driver_unregister(&imx_drm_pdrv);
kfree(imx_drm_device);
}
module_init(imx_drm_init);
module_exit(imx_drm_exit);
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
MODULE_DESCRIPTION("i.MX drm driver core");
MODULE_LICENSE("GPL");