diff options
Diffstat (limited to 'drivers/staging/imx-drm/imx-drm-core.c')
| -rw-r--r-- | drivers/staging/imx-drm/imx-drm-core.c | 884 |
1 files changed, 884 insertions, 0 deletions
diff --git a/drivers/staging/imx-drm/imx-drm-core.c b/drivers/staging/imx-drm/imx-drm-core.c new file mode 100644 index 000000000000..1913199ba16e --- /dev/null +++ b/drivers/staging/imx-drm/imx-drm-core.c @@ -0,0 +1,884 @@ +/* + * 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 references; + 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; +}; + +static int imx_drm_driver_firstopen(struct drm_device *drm) +{ + if (!imx_drm_device_get()) + return -EINVAL; + + return 0; +} + +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); + + imx_drm_device_put(); +} + +static int imx_drm_driver_unload(struct drm_device *drm) +{ + struct imx_drm_device *imxdrm = drm->dev_private; + + 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(struct drm_crtc *crtc, u32 encoder_type, + u32 interface_pix_fmt) +{ + struct imx_drm_device *imxdrm = crtc->dev->dev_private; + struct imx_drm_crtc *imx_crtc; + struct imx_drm_crtc_helper_funcs *helper; + + mutex_lock(&imxdrm->mutex); + + list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) + if (imx_crtc->crtc == crtc) + goto found; + + mutex_unlock(&imxdrm->mutex); + + return -EINVAL; +found: + mutex_unlock(&imxdrm->mutex); + + 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); + return 0; +} +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 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, + .fasync = drm_fasync, + .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; + + mutex_lock(&imxdrm->mutex); + + 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; + } + } + + imxdrm->references++; + + mutex_unlock(&imxdrm->mutex); + + 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); + + imxdrm->references--; + + 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; + + 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; + const struct drm_crtc_funcs *crtc_funcs; + int ret; + + mutex_lock(&imxdrm->mutex); + + if (imxdrm->references) { + 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; + + crtc_funcs = imx_drm_helper_funcs->crtc_funcs; + + 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->references) { + 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) { + kfree(imx_drm_encoder); + 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; + + mutex_lock(&imxdrm->mutex); + + list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) { + if (imx_crtc->crtc == crtc) + goto found; + i++; + } + + mutex_unlock(&imxdrm->mutex); + + return -EINVAL; +found: + mutex_unlock(&imxdrm->mutex); + + return i; +} + +/* + * 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->references) { + 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 struct drm_ioctl_desc imx_drm_ioctls[] = { + /* none so far */ +}; + +static struct drm_driver imx_drm_driver = { + .driver_features = DRIVER_MODESET | DRIVER_GEM, + .load = imx_drm_driver_load, + .unload = imx_drm_driver_unload, + .firstopen = imx_drm_driver_firstopen, + .lastclose = imx_drm_driver_lastclose, + .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_cma_dumb_destroy, + + .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 = __devexit_p(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 (!imx_drm_pdev) { + ret = -EINVAL; + 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"); |