- 根目录:
- drivers
- gpu
- drm
- exynos
- exynos_drm_drv.c
/*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* Authors:
* Inki Dae <inki.dae@samsung.com>
* Joonyoung Shim <jy0922.shim@samsung.com>
* Seung-Woo Kim <sw0312.kim@samsung.com>
*
* 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 <linux/pm_runtime.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <linux/component.h>
#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_crtc.h"
#include "exynos_drm_fbdev.h"
#include "exynos_drm_fb.h"
#include "exynos_drm_gem.h"
#include "exynos_drm_plane.h"
#include "exynos_drm_vidi.h"
#include "exynos_drm_g2d.h"
#include "exynos_drm_ipp.h"
#include "exynos_drm_iommu.h"
#define DRIVER_NAME "exynos"
#define DRIVER_DESC "Samsung SoC DRM"
#define DRIVER_DATE "20110530"
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0
struct exynos_atomic_commit {
struct work_struct work;
struct drm_device *dev;
struct drm_atomic_state *state;
u32 crtcs;
};
static void exynos_atomic_wait_for_commit(struct drm_atomic_state *state)
{
struct drm_crtc_state *crtc_state;
struct drm_crtc *crtc;
int i, ret;
for_each_crtc_in_state(state, crtc, crtc_state, i) {
struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
if (!crtc->state->enable)
continue;
ret = drm_crtc_vblank_get(crtc);
if (ret)
continue;
exynos_drm_crtc_wait_pending_update(exynos_crtc);
drm_crtc_vblank_put(crtc);
}
}
static void exynos_atomic_commit_complete(struct exynos_atomic_commit *commit)
{
struct drm_device *dev = commit->dev;
struct exynos_drm_private *priv = dev->dev_private;
struct drm_atomic_state *state = commit->state;
struct drm_plane *plane;
struct drm_crtc *crtc;
struct drm_plane_state *plane_state;
struct drm_crtc_state *crtc_state;
int i;
drm_atomic_helper_commit_modeset_disables(dev, state);
drm_atomic_helper_commit_modeset_enables(dev, state);
/*
* Exynos can't update planes with CRTCs and encoders disabled,
* its updates routines, specially for FIMD, requires the clocks
* to be enabled. So it is necessary to handle the modeset operations
* *before* the commit_planes() step, this way it will always
* have the relevant clocks enabled to perform the update.
*/
for_each_crtc_in_state(state, crtc, crtc_state, i) {
struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
atomic_set(&exynos_crtc->pending_update, 0);
}
for_each_plane_in_state(state, plane, plane_state, i) {
struct exynos_drm_crtc *exynos_crtc =
to_exynos_crtc(plane->crtc);
if (!plane->crtc)
continue;
atomic_inc(&exynos_crtc->pending_update);
}
drm_atomic_helper_commit_planes(dev, state, false);
exynos_atomic_wait_for_commit(state);
drm_atomic_helper_cleanup_planes(dev, state);
drm_atomic_state_free(state);
spin_lock(&priv->lock);
priv->pending &= ~commit->crtcs;
spin_unlock(&priv->lock);
wake_up_all(&priv->wait);
kfree(commit);
}
static void exynos_drm_atomic_work(struct work_struct *work)
{
struct exynos_atomic_commit *commit = container_of(work,
struct exynos_atomic_commit, work);
exynos_atomic_commit_complete(commit);
}
static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
{
struct exynos_drm_private *private;
struct drm_encoder *encoder;
unsigned int clone_mask;
int cnt, ret;
private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
if (!private)
return -ENOMEM;
init_waitqueue_head(&private->wait);
spin_lock_init(&private->lock);
dev_set_drvdata(dev->dev, dev);
dev->dev_private = (void *)private;
/*
* create mapping to manage iommu table and set a pointer to iommu
* mapping structure to iommu_mapping of private data.
* also this iommu_mapping can be used to check if iommu is supported
* or not.
*/
ret = drm_create_iommu_mapping(dev);
if (ret < 0) {
DRM_ERROR("failed to create iommu mapping.\n");
goto err_free_private;
}
drm_mode_config_init(dev);
exynos_drm_mode_config_init(dev);
/* setup possible_clones. */
cnt = 0;
clone_mask = 0;
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
clone_mask |= (1 << (cnt++));
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
encoder->possible_clones = clone_mask;
platform_set_drvdata(dev->platformdev, dev);
/* Try to bind all sub drivers. */
ret = component_bind_all(dev->dev, dev);
if (ret)
goto err_mode_config_cleanup;
ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
if (ret)
goto err_unbind_all;
/* Probe non kms sub drivers and virtual display driver. */
ret = exynos_drm_device_subdrv_probe(dev);
if (ret)
goto err_cleanup_vblank;
drm_mode_config_reset(dev);
/*
* enable drm irq mode.
* - with irq_enabled = true, 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.
*/
dev->irq_enabled = true;
/*
* with vblank_disable_allowed = true, 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)
*/
dev->vblank_disable_allowed = true;
/* init kms poll for handling hpd */
drm_kms_helper_poll_init(dev);
/* force connectors detection */
drm_helper_hpd_irq_event(dev);
return 0;
err_cleanup_vblank:
drm_vblank_cleanup(dev);
err_unbind_all:
component_unbind_all(dev->dev, dev);
err_mode_config_cleanup:
drm_mode_config_cleanup(dev);
drm_release_iommu_mapping(dev);
err_free_private:
kfree(private);
return ret;
}
static int exynos_drm_unload(struct drm_device *dev)
{
exynos_drm_device_subdrv_remove(dev);
exynos_drm_fbdev_fini(dev);
drm_kms_helper_poll_fini(dev);
drm_vblank_cleanup(dev);
component_unbind_all(dev->dev, dev);
drm_mode_config_cleanup(dev);
drm_release_iommu_mapping(dev);
kfree(dev->dev_private);
dev->dev_private = NULL;
return 0;
}
static int commit_is_pending(struct exynos_drm_private *priv, u32 crtcs)
{
bool pending;
spin_lock(&priv->lock);
pending = priv->pending & crtcs;
spin_unlock(&priv->lock);
return pending;
}
int exynos_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state,
bool async)
{
struct exynos_drm_private *priv = dev->dev_private;
struct exynos_atomic_commit *commit;
int i, ret;
commit = kzalloc(sizeof(*commit), GFP_KERNEL);
if (!commit)
return -ENOMEM;
ret = drm_atomic_helper_prepare_planes(dev, state);
if (ret) {
kfree(commit);
return ret;
}
/* This is the point of no return */
INIT_WORK(&commit->work, exynos_drm_atomic_work);
commit->dev = dev;
commit->state = state;
/* Wait until all affected CRTCs have completed previous commits and
* mark them as pending.
*/
for (i = 0; i < dev->mode_config.num_crtc; ++i) {
if (state->crtcs[i])
commit->crtcs |= 1 << drm_crtc_index(state->crtcs[i]);
}
wait_event(priv->wait, !commit_is_pending(priv, commit->crtcs));
spin_lock(&priv->lock);
priv->pending |= commit->crtcs;
spin_unlock(&priv->lock);
drm_atomic_helper_swap_state(dev, state);
if (async)
schedule_work(&commit->work);
else
exynos_atomic_commit_complete(commit);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int exynos_drm_suspend(struct drm_device *dev, pm_message_t state)
{
struct drm_connector *connector;
drm_modeset_lock_all(dev);
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
int old_dpms = connector->dpms;
if (connector->funcs->dpms)
connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
/* Set the old mode back to the connector for resume */
connector->dpms = old_dpms;
}
drm_modeset_unlock_all(dev);
return 0;
}
static int exynos_drm_resume(struct drm_device *dev)
{
struct drm_connector *connector;
drm_modeset_lock_all(dev);
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
if (connector->funcs->dpms) {
int dpms = connector->dpms;
connector->dpms = DRM_MODE_DPMS_OFF;
connector->funcs->dpms(connector, dpms);
}
}
drm_modeset_unlock_all(dev);
return 0;
}
#endif
static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
{
struct drm_exynos_file_private *file_priv;
int ret;
file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
if (!file_priv)
return -ENOMEM;
file->driver_priv = file_priv;
ret = exynos_drm_subdrv_open(dev, file);
if (ret)
goto err_file_priv_free;
return ret;
err_file_priv_free:
kfree(file_priv);
file->driver_priv = NULL;
return ret;
}
static void exynos_drm_preclose(struct drm_device *dev,
struct drm_file *file)
{
exynos_drm_subdrv_close(dev, file);
}
static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
{
struct drm_pending_event *e, *et;
unsigned long flags;
if (!file->driver_priv)
return;
spin_lock_irqsave(&dev->event_lock, flags);
/* Release all events handled by page flip handler but not freed. */
list_for_each_entry_safe(e, et, &file->event_list, link) {
list_del(&e->link);
e->destroy(e);
}
spin_unlock_irqrestore(&dev->event_lock, flags);
kfree(file->driver_priv);
file->driver_priv = NULL;
}
static void exynos_drm_lastclose(struct drm_device *dev)
{
exynos_drm_fbdev_restore_mode(dev);
}
static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
.fault = exynos_drm_gem_fault,
.open = drm_gem_vm_open,
.close = drm_gem_vm_close,
};
static const struct drm_ioctl_desc exynos_ioctls[] = {
DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
DRM_AUTH | DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
DRM_AUTH),
DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
DRM_AUTH | DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
DRM_AUTH | DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
DRM_AUTH | DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY, exynos_drm_ipp_get_property,
DRM_AUTH | DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY, exynos_drm_ipp_set_property,
DRM_AUTH | DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF, exynos_drm_ipp_queue_buf,
DRM_AUTH | DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL, exynos_drm_ipp_cmd_ctrl,
DRM_AUTH | DRM_RENDER_ALLOW),
};
static const struct file_operations exynos_drm_driver_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.mmap = exynos_drm_gem_mmap,
.poll = drm_poll,
.read = drm_read,
.unlocked_ioctl = drm_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = drm_compat_ioctl,
#endif
.release = drm_release,
};
static struct drm_driver exynos_drm_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
| DRIVER_ATOMIC | DRIVER_RENDER,
.load = exynos_drm_load,
.unload = exynos_drm_unload,
.open = exynos_drm_open,
.preclose = exynos_drm_preclose,
.lastclose = exynos_drm_lastclose,
.postclose = exynos_drm_postclose,
.set_busid = drm_platform_set_busid,
.get_vblank_counter = drm_vblank_no_hw_counter,
.enable_vblank = exynos_drm_crtc_enable_vblank,
.disable_vblank = exynos_drm_crtc_disable_vblank,
.gem_free_object = exynos_drm_gem_free_object,
.gem_vm_ops = &exynos_drm_gem_vm_ops,
.dumb_create = exynos_drm_gem_dumb_create,
.dumb_map_offset = exynos_drm_gem_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_export = drm_gem_prime_export,
.gem_prime_import = drm_gem_prime_import,
.gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
.gem_prime_import_sg_table = exynos_drm_gem_prime_import_sg_table,
.gem_prime_vmap = exynos_drm_gem_prime_vmap,
.gem_prime_vunmap = exynos_drm_gem_prime_vunmap,
.ioctls = exynos_ioctls,
.num_ioctls = ARRAY_SIZE(exynos_ioctls),
.fops = &exynos_drm_driver_fops,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
};
#ifdef CONFIG_PM_SLEEP
static int exynos_drm_sys_suspend(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
pm_message_t message;
if (pm_runtime_suspended(dev) || !drm_dev)
return 0;
message.event = PM_EVENT_SUSPEND;
return exynos_drm_suspend(drm_dev, message);
}
static int exynos_drm_sys_resume(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
if (pm_runtime_suspended(dev) || !drm_dev)
return 0;
return exynos_drm_resume(drm_dev);
}
#endif
static const struct dev_pm_ops exynos_drm_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_sys_suspend, exynos_drm_sys_resume)
};
/* forward declaration */
static struct platform_driver exynos_drm_platform_driver;
/*
* Connector drivers should not be placed before associated crtc drivers,
* because connector requires pipe number of its crtc during initialization.
*/
static struct platform_driver *const exynos_drm_kms_drivers[] = {
#ifdef CONFIG_DRM_EXYNOS_FIMD
&fimd_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS5433_DECON
&exynos5433_decon_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS7_DECON
&decon_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS_MIC
&mic_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS_DP
&dp_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS_DSI
&dsi_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS_MIXER
&mixer_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS_HDMI
&hdmi_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS_VIDI
&vidi_driver,
#endif
};
static struct platform_driver *const exynos_drm_non_kms_drivers[] = {
#ifdef CONFIG_DRM_EXYNOS_G2D
&g2d_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS_FIMC
&fimc_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS_ROTATOR
&rotator_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS_GSC
&gsc_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS_IPP
&ipp_driver,
#endif
&exynos_drm_platform_driver,
};
static struct platform_driver *const exynos_drm_drv_with_simple_dev[] = {
#ifdef CONFIG_DRM_EXYNOS_VIDI
&vidi_driver,
#endif
#ifdef CONFIG_DRM_EXYNOS_IPP
&ipp_driver,
#endif
&exynos_drm_platform_driver,
};
#define PDEV_COUNT ARRAY_SIZE(exynos_drm_drv_with_simple_dev)
static int compare_dev(struct device *dev, void *data)
{
return dev == (struct device *)data;
}
static struct component_match *exynos_drm_match_add(struct device *dev)
{
struct component_match *match = NULL;
int i;
for (i = 0; i < ARRAY_SIZE(exynos_drm_kms_drivers); ++i) {
struct device_driver *drv = &exynos_drm_kms_drivers[i]->driver;
struct device *p = NULL, *d;
while ((d = bus_find_device(&platform_bus_type, p, drv,
(void *)platform_bus_type.match))) {
put_device(p);
component_match_add(dev, &match, compare_dev, d);
p = d;
}
put_device(p);
}
return match ?: ERR_PTR(-ENODEV);
}
static int exynos_drm_bind(struct device *dev)
{
return drm_platform_init(&exynos_drm_driver, to_platform_device(dev));
}
static void exynos_drm_unbind(struct device *dev)
{
drm_put_dev(dev_get_drvdata(dev));
}
static const struct component_master_ops exynos_drm_ops = {
.bind = exynos_drm_bind,
.unbind = exynos_drm_unbind,
};
static int exynos_drm_platform_probe(struct platform_device *pdev)
{
struct component_match *match;
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls);
match = exynos_drm_match_add(&pdev->dev);
if (IS_ERR(match))
return PTR_ERR(match);
return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
match);
}
static int exynos_drm_platform_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &exynos_drm_ops);
return 0;
}
static struct platform_driver exynos_drm_platform_driver = {
.probe = exynos_drm_platform_probe,
.remove = exynos_drm_platform_remove,
.driver = {
.name = "exynos-drm",
.pm = &exynos_drm_pm_ops,
},
};
static struct platform_device *exynos_drm_pdevs[PDEV_COUNT];
static void exynos_drm_unregister_devices(void)
{
int i = PDEV_COUNT;
while (--i >= 0) {
platform_device_unregister(exynos_drm_pdevs[i]);
exynos_drm_pdevs[i] = NULL;
}
}
static int exynos_drm_register_devices(void)
{
int i;
for (i = 0; i < PDEV_COUNT; ++i) {
struct platform_driver *d = exynos_drm_drv_with_simple_dev[i];
struct platform_device *pdev =
platform_device_register_simple(d->driver.name, -1,
NULL, 0);
if (!IS_ERR(pdev)) {
exynos_drm_pdevs[i] = pdev;
continue;
}
while (--i >= 0) {
platform_device_unregister(exynos_drm_pdevs[i]);
exynos_drm_pdevs[i] = NULL;
}
return PTR_ERR(pdev);
}
return 0;
}
static void exynos_drm_unregister_drivers(struct platform_driver * const *drv,
int count)
{
while (--count >= 0)
platform_driver_unregister(drv[count]);
}
static int exynos_drm_register_drivers(struct platform_driver * const *drv,
int count)
{
int i, ret;
for (i = 0; i < count; ++i) {
ret = platform_driver_register(drv[i]);
if (!ret)
continue;
while (--i >= 0)
platform_driver_unregister(drv[i]);
return ret;
}
return 0;
}
static inline int exynos_drm_register_kms_drivers(void)
{
return exynos_drm_register_drivers(exynos_drm_kms_drivers,
ARRAY_SIZE(exynos_drm_kms_drivers));
}
static inline int exynos_drm_register_non_kms_drivers(void)
{
return exynos_drm_register_drivers(exynos_drm_non_kms_drivers,
ARRAY_SIZE(exynos_drm_non_kms_drivers));
}
static inline void exynos_drm_unregister_kms_drivers(void)
{
exynos_drm_unregister_drivers(exynos_drm_kms_drivers,
ARRAY_SIZE(exynos_drm_kms_drivers));
}
static inline void exynos_drm_unregister_non_kms_drivers(void)
{
exynos_drm_unregister_drivers(exynos_drm_non_kms_drivers,
ARRAY_SIZE(exynos_drm_non_kms_drivers));
}
static int exynos_drm_init(void)
{
int ret;
ret = exynos_drm_register_devices();
if (ret)
return ret;
ret = exynos_drm_register_kms_drivers();
if (ret)
goto err_unregister_pdevs;
ret = exynos_drm_register_non_kms_drivers();
if (ret)
goto err_unregister_kms_drivers;
return 0;
err_unregister_kms_drivers:
exynos_drm_unregister_kms_drivers();
err_unregister_pdevs:
exynos_drm_unregister_devices();
return ret;
}
static void exynos_drm_exit(void)
{
exynos_drm_unregister_non_kms_drivers();
exynos_drm_unregister_kms_drivers();
exynos_drm_unregister_devices();
}
module_init(exynos_drm_init);
module_exit(exynos_drm_exit);
MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
MODULE_DESCRIPTION("Samsung SoC DRM Driver");
MODULE_LICENSE("GPL");