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|
/*
* drivers/staging/omapdrm/omap_drv.c
*
* Copyright (C) 2011 Texas Instruments
* Author: Rob Clark <rob@ti.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "omap_drv.h"
#include "drm_crtc_helper.h"
#include "drm_fb_helper.h"
#define DRIVER_NAME MODULE_NAME
#define DRIVER_DESC "OMAP DRM"
#define DRIVER_DATE "20110917"
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0
#define DRIVER_PATCHLEVEL 0
struct drm_device *drm_device;
static int num_crtc = CONFIG_DRM_OMAP_NUM_CRTCS;
MODULE_PARM_DESC(num_crtc, "Number of overlays to use as CRTCs");
module_param(num_crtc, int, 0600);
/*
* mode config funcs
*/
/* Notes about mapping DSS and DRM entities:
* CRTC: overlay
* encoder: manager.. with some extension to allow one primary CRTC
* and zero or more video CRTC's to be mapped to one encoder?
* connector: dssdev.. manager can be attached/detached from different
* devices
*/
static void omap_fb_output_poll_changed(struct drm_device *dev)
{
struct omap_drm_private *priv = dev->dev_private;
DBG("dev=%p", dev);
if (priv->fbdev) {
drm_fb_helper_hotplug_event(priv->fbdev);
}
}
static struct drm_mode_config_funcs omap_mode_config_funcs = {
.fb_create = omap_framebuffer_create,
.output_poll_changed = omap_fb_output_poll_changed,
};
static int get_connector_type(struct omap_dss_device *dssdev)
{
switch (dssdev->type) {
case OMAP_DISPLAY_TYPE_HDMI:
return DRM_MODE_CONNECTOR_HDMIA;
case OMAP_DISPLAY_TYPE_DPI:
if (!strcmp(dssdev->name, "dvi"))
return DRM_MODE_CONNECTOR_DVID;
/* fallthrough */
default:
return DRM_MODE_CONNECTOR_Unknown;
}
}
#if 0 /* enable when dss2 supports hotplug */
static int omap_drm_notifier(struct notifier_block *nb,
unsigned long evt, void *arg)
{
switch (evt) {
case OMAP_DSS_SIZE_CHANGE:
case OMAP_DSS_HOTPLUG_CONNECT:
case OMAP_DSS_HOTPLUG_DISCONNECT: {
struct drm_device *dev = drm_device;
DBG("hotplug event: evt=%d, dev=%p", evt, dev);
if (dev) {
drm_sysfs_hotplug_event(dev);
}
return NOTIFY_OK;
}
default: /* don't care about other events for now */
return NOTIFY_DONE;
}
}
#endif
static void dump_video_chains(void)
{
int i;
DBG("dumping video chains: ");
for (i = 0; i < omap_dss_get_num_overlays(); i++) {
struct omap_overlay *ovl = omap_dss_get_overlay(i);
struct omap_overlay_manager *mgr = ovl->manager;
struct omap_dss_device *dssdev = mgr ? mgr->device : NULL;
if (dssdev) {
DBG("%d: %s -> %s -> %s", i, ovl->name, mgr->name,
dssdev->name);
} else if (mgr) {
DBG("%d: %s -> %s", i, ovl->name, mgr->name);
} else {
DBG("%d: %s", i, ovl->name);
}
}
}
/* create encoders for each manager */
static int create_encoder(struct drm_device *dev,
struct omap_overlay_manager *mgr)
{
struct omap_drm_private *priv = dev->dev_private;
struct drm_encoder *encoder = omap_encoder_init(dev, mgr);
if (!encoder) {
dev_err(dev->dev, "could not create encoder: %s\n",
mgr->name);
return -ENOMEM;
}
BUG_ON(priv->num_encoders >= ARRAY_SIZE(priv->encoders));
priv->encoders[priv->num_encoders++] = encoder;
return 0;
}
/* create connectors for each display device */
static int create_connector(struct drm_device *dev,
struct omap_dss_device *dssdev)
{
struct omap_drm_private *priv = dev->dev_private;
static struct notifier_block *notifier;
struct drm_connector *connector;
int j;
if (!dssdev->driver) {
dev_warn(dev->dev, "%s has no driver.. skipping it\n",
dssdev->name);
return 0;
}
if (!(dssdev->driver->get_timings ||
dssdev->driver->read_edid)) {
dev_warn(dev->dev, "%s driver does not support "
"get_timings or read_edid.. skipping it!\n",
dssdev->name);
return 0;
}
connector = omap_connector_init(dev,
get_connector_type(dssdev), dssdev);
if (!connector) {
dev_err(dev->dev, "could not create connector: %s\n",
dssdev->name);
return -ENOMEM;
}
BUG_ON(priv->num_connectors >= ARRAY_SIZE(priv->connectors));
priv->connectors[priv->num_connectors++] = connector;
#if 0 /* enable when dss2 supports hotplug */
notifier = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
notifier->notifier_call = omap_drm_notifier;
omap_dss_add_notify(dssdev, notifier);
#else
notifier = NULL;
#endif
for (j = 0; j < priv->num_encoders; j++) {
struct omap_overlay_manager *mgr =
omap_encoder_get_manager(priv->encoders[j]);
if (mgr->device == dssdev) {
drm_mode_connector_attach_encoder(connector,
priv->encoders[j]);
}
}
return 0;
}
/* create up to max_overlays CRTCs mapping to overlays.. by default,
* connect the overlays to different managers/encoders, giving priority
* to encoders connected to connectors with a detected connection
*/
static int create_crtc(struct drm_device *dev, struct omap_overlay *ovl,
int *j, unsigned int connected_connectors)
{
struct omap_drm_private *priv = dev->dev_private;
struct omap_overlay_manager *mgr = NULL;
struct drm_crtc *crtc;
if (ovl->manager) {
DBG("disconnecting %s from %s", ovl->name,
ovl->manager->name);
ovl->unset_manager(ovl);
}
/* find next best connector, ones with detected connection first
*/
while (*j < priv->num_connectors && !mgr) {
if (connected_connectors & (1 << *j)) {
struct drm_encoder *encoder =
omap_connector_attached_encoder(
priv->connectors[*j]);
if (encoder) {
mgr = omap_encoder_get_manager(encoder);
}
}
(*j)++;
}
/* if we couldn't find another connected connector, lets start
* looking at the unconnected connectors:
*
* note: it might not be immediately apparent, but thanks to
* the !mgr check in both this loop and the one above, the only
* way to enter this loop is with *j == priv->num_connectors,
* so idx can never go negative.
*/
while (*j < 2 * priv->num_connectors && !mgr) {
int idx = *j - priv->num_connectors;
if (!(connected_connectors & (1 << idx))) {
struct drm_encoder *encoder =
omap_connector_attached_encoder(
priv->connectors[idx]);
if (encoder) {
mgr = omap_encoder_get_manager(encoder);
}
}
(*j)++;
}
if (mgr) {
DBG("connecting %s to %s", ovl->name, mgr->name);
ovl->set_manager(ovl, mgr);
}
crtc = omap_crtc_init(dev, ovl, priv->num_crtcs);
if (!crtc) {
dev_err(dev->dev, "could not create CRTC: %s\n",
ovl->name);
return -ENOMEM;
}
BUG_ON(priv->num_crtcs >= ARRAY_SIZE(priv->crtcs));
priv->crtcs[priv->num_crtcs++] = crtc;
return 0;
}
static int match_dev_name(struct omap_dss_device *dssdev, void *data)
{
return !strcmp(dssdev->name, data);
}
static unsigned int detect_connectors(struct drm_device *dev)
{
struct omap_drm_private *priv = dev->dev_private;
unsigned int connected_connectors = 0;
int i;
for (i = 0; i < priv->num_connectors; i++) {
struct drm_connector *connector = priv->connectors[i];
if (omap_connector_detect(connector, true) ==
connector_status_connected) {
connected_connectors |= (1 << i);
}
}
return connected_connectors;
}
static int omap_modeset_init(struct drm_device *dev)
{
const struct omap_drm_platform_data *pdata = dev->dev->platform_data;
struct omap_drm_private *priv = dev->dev_private;
struct omap_dss_device *dssdev = NULL;
int i, j;
unsigned int connected_connectors = 0;
drm_mode_config_init(dev);
if (pdata) {
/* if platform data is provided by the board file, use it to
* control which overlays, managers, and devices we own.
*/
for (i = 0; i < pdata->mgr_cnt; i++) {
struct omap_overlay_manager *mgr =
omap_dss_get_overlay_manager(pdata->mgr_ids[i]);
create_encoder(dev, mgr);
}
for (i = 0; i < pdata->dev_cnt; i++) {
struct omap_dss_device *dssdev =
omap_dss_find_device(
(void *)pdata->dev_names[i], match_dev_name);
if (!dssdev) {
dev_warn(dev->dev, "no such dssdev: %s\n",
pdata->dev_names[i]);
continue;
}
create_connector(dev, dssdev);
}
connected_connectors = detect_connectors(dev);
j = 0;
for (i = 0; i < pdata->ovl_cnt; i++) {
struct omap_overlay *ovl =
omap_dss_get_overlay(pdata->ovl_ids[i]);
create_crtc(dev, ovl, &j, connected_connectors);
}
} else {
/* otherwise just grab up to CONFIG_DRM_OMAP_NUM_CRTCS and try
* to make educated guesses about everything else
*/
int max_overlays = min(omap_dss_get_num_overlays(), num_crtc);
for (i = 0; i < omap_dss_get_num_overlay_managers(); i++) {
create_encoder(dev, omap_dss_get_overlay_manager(i));
}
for_each_dss_dev(dssdev) {
create_connector(dev, dssdev);
}
connected_connectors = detect_connectors(dev);
j = 0;
for (i = 0; i < max_overlays; i++) {
create_crtc(dev, omap_dss_get_overlay(i),
&j, connected_connectors);
}
}
/* for now keep the mapping of CRTCs and encoders static.. */
for (i = 0; i < priv->num_encoders; i++) {
struct drm_encoder *encoder = priv->encoders[i];
struct omap_overlay_manager *mgr =
omap_encoder_get_manager(encoder);
encoder->possible_crtcs = 0;
for (j = 0; j < priv->num_crtcs; j++) {
struct omap_overlay *ovl =
omap_crtc_get_overlay(priv->crtcs[j]);
if (ovl->manager == mgr) {
encoder->possible_crtcs |= (1 << j);
}
}
DBG("%s: possible_crtcs=%08x", mgr->name,
encoder->possible_crtcs);
}
dump_video_chains();
dev->mode_config.min_width = 256;
dev->mode_config.min_height = 256;
/* note: eventually will need some cpu_is_omapXYZ() type stuff here
* to fill in these limits properly on different OMAP generations..
*/
dev->mode_config.max_width = 2048;
dev->mode_config.max_height = 2048;
dev->mode_config.funcs = &omap_mode_config_funcs;
return 0;
}
static void omap_modeset_free(struct drm_device *dev)
{
drm_mode_config_cleanup(dev);
}
/*
* drm ioctl funcs
*/
static int ioctl_get_param(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_omap_param *args = data;
DBG("%p: param=%llu", dev, args->param);
switch (args->param) {
case OMAP_PARAM_CHIPSET_ID:
args->value = GET_OMAP_TYPE;
break;
default:
DBG("unknown parameter %lld", args->param);
return -EINVAL;
}
return 0;
}
static int ioctl_set_param(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_omap_param *args = data;
switch (args->param) {
default:
DBG("unknown parameter %lld", args->param);
return -EINVAL;
}
return 0;
}
static int ioctl_gem_new(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_omap_gem_new *args = data;
DBG("%p:%p: size=0x%08x, flags=%08x", dev, file_priv,
args->size.bytes, args->flags);
return omap_gem_new_handle(dev, file_priv, args->size,
args->flags, &args->handle);
}
static int ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_omap_gem_cpu_prep *args = data;
struct drm_gem_object *obj;
int ret;
VERB("%p:%p: handle=%d, op=%x", dev, file_priv, args->handle, args->op);
obj = drm_gem_object_lookup(dev, file_priv, args->handle);
if (!obj) {
return -ENOENT;
}
ret = omap_gem_op_sync(obj, args->op);
if (!ret) {
ret = omap_gem_op_start(obj, args->op);
}
drm_gem_object_unreference_unlocked(obj);
return ret;
}
static int ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_omap_gem_cpu_fini *args = data;
struct drm_gem_object *obj;
int ret;
VERB("%p:%p: handle=%d", dev, file_priv, args->handle);
obj = drm_gem_object_lookup(dev, file_priv, args->handle);
if (!obj) {
return -ENOENT;
}
/* XXX flushy, flushy */
ret = 0;
if (!ret) {
ret = omap_gem_op_finish(obj, args->op);
}
drm_gem_object_unreference_unlocked(obj);
return ret;
}
static int ioctl_gem_info(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_omap_gem_info *args = data;
struct drm_gem_object *obj;
int ret = 0;
DBG("%p:%p: handle=%d", dev, file_priv, args->handle);
obj = drm_gem_object_lookup(dev, file_priv, args->handle);
if (!obj) {
return -ENOENT;
}
args->size = obj->size; /* for now */
args->offset = omap_gem_mmap_offset(obj);
drm_gem_object_unreference_unlocked(obj);
return ret;
}
struct drm_ioctl_desc ioctls[DRM_COMMAND_END - DRM_COMMAND_BASE] = {
DRM_IOCTL_DEF_DRV(OMAP_GET_PARAM, ioctl_get_param, DRM_UNLOCKED|DRM_AUTH),
DRM_IOCTL_DEF_DRV(OMAP_SET_PARAM, ioctl_set_param, DRM_UNLOCKED|DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(OMAP_GEM_NEW, ioctl_gem_new, DRM_UNLOCKED|DRM_AUTH),
DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_PREP, ioctl_gem_cpu_prep, DRM_UNLOCKED|DRM_AUTH),
DRM_IOCTL_DEF_DRV(OMAP_GEM_CPU_FINI, ioctl_gem_cpu_fini, DRM_UNLOCKED|DRM_AUTH),
DRM_IOCTL_DEF_DRV(OMAP_GEM_INFO, ioctl_gem_info, DRM_UNLOCKED|DRM_AUTH),
};
/*
* drm driver funcs
*/
/**
* load - setup chip and create an initial config
* @dev: DRM device
* @flags: startup flags
*
* The driver load routine has to do several things:
* - initialize the memory manager
* - allocate initial config memory
* - setup the DRM framebuffer with the allocated memory
*/
static int dev_load(struct drm_device *dev, unsigned long flags)
{
struct omap_drm_private *priv;
int ret;
DBG("load: dev=%p", dev);
drm_device = dev;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv) {
dev_err(dev->dev, "could not allocate priv\n");
return -ENOMEM;
}
dev->dev_private = priv;
ret = omap_modeset_init(dev);
if (ret) {
dev_err(dev->dev, "omap_modeset_init failed: ret=%d\n", ret);
dev->dev_private = NULL;
kfree(priv);
return ret;
}
priv->fbdev = omap_fbdev_init(dev);
if (!priv->fbdev) {
dev_warn(dev->dev, "omap_fbdev_init failed\n");
/* well, limp along without an fbdev.. maybe X11 will work? */
}
drm_kms_helper_poll_init(dev);
ret = drm_vblank_init(dev, priv->num_crtcs);
if (ret) {
dev_warn(dev->dev, "could not init vblank\n");
}
return 0;
}
static int dev_unload(struct drm_device *dev)
{
DBG("unload: dev=%p", dev);
drm_vblank_cleanup(dev);
drm_kms_helper_poll_fini(dev);
omap_fbdev_free(dev);
omap_modeset_free(dev);
kfree(dev->dev_private);
dev->dev_private = NULL;
return 0;
}
static int dev_open(struct drm_device *dev, struct drm_file *file)
{
file->driver_priv = NULL;
DBG("open: dev=%p, file=%p", dev, file);
return 0;
}
static int dev_firstopen(struct drm_device *dev)
{
DBG("firstopen: dev=%p", dev);
return 0;
}
/**
* lastclose - clean up after all DRM clients have exited
* @dev: DRM device
*
* Take care of cleaning up after all DRM clients have exited. In the
* mode setting case, we want to restore the kernel's initial mode (just
* in case the last client left us in a bad state).
*/
static void dev_lastclose(struct drm_device *dev)
{
/* we don't support vga-switcheroo.. so just make sure the fbdev
* mode is active
*/
struct omap_drm_private *priv = dev->dev_private;
int ret;
DBG("lastclose: dev=%p", dev);
ret = drm_fb_helper_restore_fbdev_mode(priv->fbdev);
if (ret)
DBG("failed to restore crtc mode");
}
static void dev_preclose(struct drm_device *dev, struct drm_file *file)
{
DBG("preclose: dev=%p", dev);
}
static void dev_postclose(struct drm_device *dev, struct drm_file *file)
{
DBG("postclose: dev=%p, file=%p", dev, file);
}
/**
* enable_vblank - enable vblank interrupt events
* @dev: DRM device
* @crtc: which irq to enable
*
* Enable vblank interrupts for @crtc. If the device doesn't have
* a hardware vblank counter, this routine should be a no-op, since
* interrupts will have to stay on to keep the count accurate.
*
* RETURNS
* Zero on success, appropriate errno if the given @crtc's vblank
* interrupt cannot be enabled.
*/
static int dev_enable_vblank(struct drm_device *dev, int crtc)
{
DBG("enable_vblank: dev=%p, crtc=%d", dev, crtc);
return 0;
}
/**
* disable_vblank - disable vblank interrupt events
* @dev: DRM device
* @crtc: which irq to enable
*
* Disable vblank interrupts for @crtc. If the device doesn't have
* a hardware vblank counter, this routine should be a no-op, since
* interrupts will have to stay on to keep the count accurate.
*/
static void dev_disable_vblank(struct drm_device *dev, int crtc)
{
DBG("disable_vblank: dev=%p, crtc=%d", dev, crtc);
}
static irqreturn_t dev_irq_handler(DRM_IRQ_ARGS)
{
return IRQ_HANDLED;
}
static void dev_irq_preinstall(struct drm_device *dev)
{
DBG("irq_preinstall: dev=%p", dev);
}
static int dev_irq_postinstall(struct drm_device *dev)
{
DBG("irq_postinstall: dev=%p", dev);
return 0;
}
static void dev_irq_uninstall(struct drm_device *dev)
{
DBG("irq_uninstall: dev=%p", dev);
}
static struct vm_operations_struct omap_gem_vm_ops = {
.fault = omap_gem_fault,
.open = drm_gem_vm_open,
.close = drm_gem_vm_close,
};
static struct drm_driver omap_drm_driver = {
.driver_features =
DRIVER_HAVE_IRQ | DRIVER_MODESET | DRIVER_GEM,
.load = dev_load,
.unload = dev_unload,
.open = dev_open,
.firstopen = dev_firstopen,
.lastclose = dev_lastclose,
.preclose = dev_preclose,
.postclose = dev_postclose,
.get_vblank_counter = drm_vblank_count,
.enable_vblank = dev_enable_vblank,
.disable_vblank = dev_disable_vblank,
.irq_preinstall = dev_irq_preinstall,
.irq_postinstall = dev_irq_postinstall,
.irq_uninstall = dev_irq_uninstall,
.irq_handler = dev_irq_handler,
.reclaim_buffers = drm_core_reclaim_buffers,
.gem_init_object = omap_gem_init_object,
.gem_free_object = omap_gem_free_object,
.gem_vm_ops = &omap_gem_vm_ops,
.dumb_create = omap_gem_dumb_create,
.dumb_map_offset = omap_gem_dumb_map_offset,
.dumb_destroy = omap_gem_dumb_destroy,
.ioctls = ioctls,
.num_ioctls = DRM_OMAP_NUM_IOCTLS,
.fops = {
.owner = THIS_MODULE,
.open = drm_open,
.unlocked_ioctl = drm_ioctl,
.release = drm_release,
.mmap = omap_gem_mmap,
.poll = drm_poll,
.fasync = drm_fasync,
.read = drm_read,
.llseek = noop_llseek,
},
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
.patchlevel = DRIVER_PATCHLEVEL,
};
static int pdev_suspend(struct platform_device *pDevice, pm_message_t state)
{
DBG("");
return 0;
}
static int pdev_resume(struct platform_device *device)
{
DBG("");
return 0;
}
static void pdev_shutdown(struct platform_device *device)
{
DBG("");
}
static int pdev_probe(struct platform_device *device)
{
DBG("%s", device->name);
return drm_platform_init(&omap_drm_driver, device);
}
static int pdev_remove(struct platform_device *device)
{
DBG("");
drm_platform_exit(&omap_drm_driver, device);
return 0;
}
struct platform_driver pdev = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
},
.probe = pdev_probe,
.remove = pdev_remove,
.suspend = pdev_suspend,
.resume = pdev_resume,
.shutdown = pdev_shutdown,
};
static int __init omap_drm_init(void)
{
DBG("init");
return platform_driver_register(&pdev);
}
static void __exit omap_drm_fini(void)
{
DBG("fini");
platform_driver_unregister(&pdev);
}
/* need late_initcall() so we load after dss_driver's are loaded */
late_initcall(omap_drm_init);
module_exit(omap_drm_fini);
MODULE_AUTHOR("Rob Clark <rob@ti.com>");
MODULE_DESCRIPTION("OMAP DRM Display Driver");
MODULE_ALIAS("platform:" DRIVER_NAME);
MODULE_LICENSE("GPL v2");
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