提交 f3b7e17c 编写于 作者: D Dave Airlie

Merge branch 'topic/vga-switcheroo' of...

Merge branch 'topic/vga-switcheroo' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound into drm-core-next

* 'topic/vga-switcheroo' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  vga_switcheroo: Add the support for audio clients
  vga_switcheroo: Introduce struct vga_switcheroo_client_ops
  vga_switcheroo: Refactor using linked list
......@@ -1271,6 +1271,12 @@ static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
return can_switch;
}
static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
.set_gpu_state = i915_switcheroo_set_state,
.reprobe = NULL,
.can_switch = i915_switcheroo_can_switch,
};
static int i915_load_modeset_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
......@@ -1293,10 +1299,7 @@ static int i915_load_modeset_init(struct drm_device *dev)
intel_register_dsm_handler();
ret = vga_switcheroo_register_client(dev->pdev,
i915_switcheroo_set_state,
NULL,
i915_switcheroo_can_switch);
ret = vga_switcheroo_register_client(dev->pdev, &i915_switcheroo_ops);
if (ret)
goto cleanup_vga_client;
......
......@@ -662,6 +662,12 @@ nouveau_card_channel_init(struct drm_device *dev)
return ret;
}
static const struct vga_switcheroo_client_ops nouveau_switcheroo_ops = {
.set_gpu_state = nouveau_switcheroo_set_state,
.reprobe = nouveau_switcheroo_reprobe,
.can_switch = nouveau_switcheroo_can_switch,
};
int
nouveau_card_init(struct drm_device *dev)
{
......@@ -670,9 +676,7 @@ nouveau_card_init(struct drm_device *dev)
int ret, e = 0;
vga_client_register(dev->pdev, dev, NULL, nouveau_vga_set_decode);
vga_switcheroo_register_client(dev->pdev, nouveau_switcheroo_set_state,
nouveau_switcheroo_reprobe,
nouveau_switcheroo_can_switch);
vga_switcheroo_register_client(dev->pdev, &nouveau_switcheroo_ops);
/* Initialise internal driver API hooks */
ret = nouveau_init_engine_ptrs(dev);
......
......@@ -697,6 +697,11 @@ static bool radeon_switcheroo_can_switch(struct pci_dev *pdev)
return can_switch;
}
static const struct vga_switcheroo_client_ops radeon_switcheroo_ops = {
.set_gpu_state = radeon_switcheroo_set_state,
.reprobe = NULL,
.can_switch = radeon_switcheroo_can_switch,
};
int radeon_device_init(struct radeon_device *rdev,
struct drm_device *ddev,
......@@ -809,10 +814,7 @@ int radeon_device_init(struct radeon_device *rdev,
/* this will fail for cards that aren't VGA class devices, just
* ignore it */
vga_client_register(rdev->pdev, rdev, NULL, radeon_vga_set_decode);
vga_switcheroo_register_client(rdev->pdev,
radeon_switcheroo_set_state,
NULL,
radeon_switcheroo_can_switch);
vga_switcheroo_register_client(rdev->pdev, &radeon_switcheroo_ops);
r = radeon_init(rdev);
if (r)
......
......@@ -34,11 +34,10 @@ struct vga_switcheroo_client {
struct pci_dev *pdev;
struct fb_info *fb_info;
int pwr_state;
void (*set_gpu_state)(struct pci_dev *pdev, enum vga_switcheroo_state);
void (*reprobe)(struct pci_dev *pdev);
bool (*can_switch)(struct pci_dev *pdev);
const struct vga_switcheroo_client_ops *ops;
int id;
bool active;
struct list_head list;
};
static DEFINE_MUTEX(vgasr_mutex);
......@@ -53,16 +52,23 @@ struct vgasr_priv {
struct dentry *switch_file;
int registered_clients;
struct vga_switcheroo_client clients[VGA_SWITCHEROO_MAX_CLIENTS];
struct list_head clients;
struct vga_switcheroo_handler *handler;
};
#define ID_BIT_AUDIO 0x100
#define client_is_audio(c) ((c)->id & ID_BIT_AUDIO)
#define client_is_vga(c) ((c)->id == -1 || !client_is_audio(c))
#define client_id(c) ((c)->id & ~ID_BIT_AUDIO)
static int vga_switcheroo_debugfs_init(struct vgasr_priv *priv);
static void vga_switcheroo_debugfs_fini(struct vgasr_priv *priv);
/* only one switcheroo per system */
static struct vgasr_priv vgasr_priv;
static struct vgasr_priv vgasr_priv = {
.clients = LIST_HEAD_INIT(vgasr_priv.clients),
};
int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler)
{
......@@ -88,72 +94,119 @@ EXPORT_SYMBOL(vga_switcheroo_unregister_handler);
static void vga_switcheroo_enable(void)
{
int i;
int ret;
struct vga_switcheroo_client *client;
/* call the handler to init */
vgasr_priv.handler->init();
for (i = 0; i < VGA_SWITCHEROO_MAX_CLIENTS; i++) {
ret = vgasr_priv.handler->get_client_id(vgasr_priv.clients[i].pdev);
list_for_each_entry(client, &vgasr_priv.clients, list) {
if (client->id != -1)
continue;
ret = vgasr_priv.handler->get_client_id(client->pdev);
if (ret < 0)
return;
vgasr_priv.clients[i].id = ret;
client->id = ret;
}
vga_switcheroo_debugfs_init(&vgasr_priv);
vgasr_priv.active = true;
}
int vga_switcheroo_register_client(struct pci_dev *pdev,
void (*set_gpu_state)(struct pci_dev *pdev, enum vga_switcheroo_state),
void (*reprobe)(struct pci_dev *pdev),
bool (*can_switch)(struct pci_dev *pdev))
static int register_client(struct pci_dev *pdev,
const struct vga_switcheroo_client_ops *ops,
int id, bool active)
{
int index;
struct vga_switcheroo_client *client;
client = kzalloc(sizeof(*client), GFP_KERNEL);
if (!client)
return -ENOMEM;
client->pwr_state = VGA_SWITCHEROO_ON;
client->pdev = pdev;
client->ops = ops;
client->id = id;
client->active = active;
mutex_lock(&vgasr_mutex);
/* don't do IGD vs DIS here */
if (vgasr_priv.registered_clients & 1)
index = 1;
else
index = 0;
vgasr_priv.clients[index].pwr_state = VGA_SWITCHEROO_ON;
vgasr_priv.clients[index].pdev = pdev;
vgasr_priv.clients[index].set_gpu_state = set_gpu_state;
vgasr_priv.clients[index].reprobe = reprobe;
vgasr_priv.clients[index].can_switch = can_switch;
vgasr_priv.clients[index].id = -1;
if (pdev == vga_default_device())
vgasr_priv.clients[index].active = true;
vgasr_priv.registered_clients |= (1 << index);
list_add_tail(&client->list, &vgasr_priv.clients);
if (client_is_vga(client))
vgasr_priv.registered_clients++;
/* if we get two clients + handler */
if (vgasr_priv.registered_clients == 0x3 && vgasr_priv.handler) {
if (!vgasr_priv.active &&
vgasr_priv.registered_clients == 2 && vgasr_priv.handler) {
printk(KERN_INFO "vga_switcheroo: enabled\n");
vga_switcheroo_enable();
}
mutex_unlock(&vgasr_mutex);
return 0;
}
int vga_switcheroo_register_client(struct pci_dev *pdev,
const struct vga_switcheroo_client_ops *ops)
{
return register_client(pdev, ops, -1,
pdev == vga_default_device());
}
EXPORT_SYMBOL(vga_switcheroo_register_client);
int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
const struct vga_switcheroo_client_ops *ops,
int id, bool active)
{
return register_client(pdev, ops, id | ID_BIT_AUDIO, active);
}
EXPORT_SYMBOL(vga_switcheroo_register_audio_client);
static struct vga_switcheroo_client *
find_client_from_pci(struct list_head *head, struct pci_dev *pdev)
{
struct vga_switcheroo_client *client;
list_for_each_entry(client, head, list)
if (client->pdev == pdev)
return client;
return NULL;
}
static struct vga_switcheroo_client *
find_client_from_id(struct list_head *head, int client_id)
{
struct vga_switcheroo_client *client;
list_for_each_entry(client, head, list)
if (client->id == client_id)
return client;
return NULL;
}
static struct vga_switcheroo_client *
find_active_client(struct list_head *head)
{
struct vga_switcheroo_client *client;
list_for_each_entry(client, head, list)
if (client->active && client_is_vga(client))
return client;
return NULL;
}
void vga_switcheroo_unregister_client(struct pci_dev *pdev)
{
int i;
struct vga_switcheroo_client *client;
mutex_lock(&vgasr_mutex);
for (i = 0; i < VGA_SWITCHEROO_MAX_CLIENTS; i++) {
if (vgasr_priv.clients[i].pdev == pdev) {
vgasr_priv.registered_clients &= ~(1 << i);
break;
}
client = find_client_from_pci(&vgasr_priv.clients, pdev);
if (client) {
if (client_is_vga(client))
vgasr_priv.registered_clients--;
list_del(&client->list);
kfree(client);
}
if (vgasr_priv.active && vgasr_priv.registered_clients < 2) {
printk(KERN_INFO "vga_switcheroo: disabled\n");
vga_switcheroo_debugfs_fini(&vgasr_priv);
vgasr_priv.active = false;
}
printk(KERN_INFO "vga_switcheroo: disabled\n");
vga_switcheroo_debugfs_fini(&vgasr_priv);
vgasr_priv.active = false;
mutex_unlock(&vgasr_mutex);
}
EXPORT_SYMBOL(vga_switcheroo_unregister_client);
......@@ -161,29 +214,29 @@ EXPORT_SYMBOL(vga_switcheroo_unregister_client);
void vga_switcheroo_client_fb_set(struct pci_dev *pdev,
struct fb_info *info)
{
int i;
struct vga_switcheroo_client *client;
mutex_lock(&vgasr_mutex);
for (i = 0; i < VGA_SWITCHEROO_MAX_CLIENTS; i++) {
if (vgasr_priv.clients[i].pdev == pdev) {
vgasr_priv.clients[i].fb_info = info;
break;
}
}
client = find_client_from_pci(&vgasr_priv.clients, pdev);
if (client)
client->fb_info = info;
mutex_unlock(&vgasr_mutex);
}
EXPORT_SYMBOL(vga_switcheroo_client_fb_set);
static int vga_switcheroo_show(struct seq_file *m, void *v)
{
int i;
struct vga_switcheroo_client *client;
int i = 0;
mutex_lock(&vgasr_mutex);
for (i = 0; i < VGA_SWITCHEROO_MAX_CLIENTS; i++) {
seq_printf(m, "%d:%s:%c:%s:%s\n", i,
vgasr_priv.clients[i].id == VGA_SWITCHEROO_DIS ? "DIS" : "IGD",
vgasr_priv.clients[i].active ? '+' : ' ',
vgasr_priv.clients[i].pwr_state ? "Pwr" : "Off",
pci_name(vgasr_priv.clients[i].pdev));
list_for_each_entry(client, &vgasr_priv.clients, list) {
seq_printf(m, "%d:%s%s:%c:%s:%s\n", i,
client_id(client) == VGA_SWITCHEROO_DIS ? "DIS" : "IGD",
client_is_vga(client) ? "" : "-Audio",
client->active ? '+' : ' ',
client->pwr_state ? "Pwr" : "Off",
pci_name(client->pdev));
i++;
}
mutex_unlock(&vgasr_mutex);
return 0;
......@@ -199,7 +252,7 @@ static int vga_switchon(struct vga_switcheroo_client *client)
if (vgasr_priv.handler->power_state)
vgasr_priv.handler->power_state(client->id, VGA_SWITCHEROO_ON);
/* call the driver callback to turn on device */
client->set_gpu_state(client->pdev, VGA_SWITCHEROO_ON);
client->ops->set_gpu_state(client->pdev, VGA_SWITCHEROO_ON);
client->pwr_state = VGA_SWITCHEROO_ON;
return 0;
}
......@@ -207,25 +260,30 @@ static int vga_switchon(struct vga_switcheroo_client *client)
static int vga_switchoff(struct vga_switcheroo_client *client)
{
/* call the driver callback to turn off device */
client->set_gpu_state(client->pdev, VGA_SWITCHEROO_OFF);
client->ops->set_gpu_state(client->pdev, VGA_SWITCHEROO_OFF);
if (vgasr_priv.handler->power_state)
vgasr_priv.handler->power_state(client->id, VGA_SWITCHEROO_OFF);
client->pwr_state = VGA_SWITCHEROO_OFF;
return 0;
}
static void set_audio_state(int id, int state)
{
struct vga_switcheroo_client *client;
client = find_client_from_id(&vgasr_priv.clients, id | ID_BIT_AUDIO);
if (client && client->pwr_state != state) {
client->ops->set_gpu_state(client->pdev, state);
client->pwr_state = state;
}
}
/* stage one happens before delay */
static int vga_switchto_stage1(struct vga_switcheroo_client *new_client)
{
int i;
struct vga_switcheroo_client *active = NULL;
struct vga_switcheroo_client *active;
for (i = 0; i < VGA_SWITCHEROO_MAX_CLIENTS; i++) {
if (vgasr_priv.clients[i].active == true) {
active = &vgasr_priv.clients[i];
break;
}
}
active = find_active_client(&vgasr_priv.clients);
if (!active)
return 0;
......@@ -233,6 +291,7 @@ static int vga_switchto_stage1(struct vga_switcheroo_client *new_client)
vga_switchon(new_client);
vga_set_default_device(new_client->pdev);
set_audio_state(new_client->id, VGA_SWITCHEROO_ON);
return 0;
}
......@@ -241,15 +300,9 @@ static int vga_switchto_stage1(struct vga_switcheroo_client *new_client)
static int vga_switchto_stage2(struct vga_switcheroo_client *new_client)
{
int ret;
int i;
struct vga_switcheroo_client *active = NULL;
struct vga_switcheroo_client *active;
for (i = 0; i < VGA_SWITCHEROO_MAX_CLIENTS; i++) {
if (vgasr_priv.clients[i].active == true) {
active = &vgasr_priv.clients[i];
break;
}
}
active = find_active_client(&vgasr_priv.clients);
if (!active)
return 0;
......@@ -265,8 +318,10 @@ static int vga_switchto_stage2(struct vga_switcheroo_client *new_client)
if (ret)
return ret;
if (new_client->reprobe)
new_client->reprobe(new_client->pdev);
if (new_client->ops->reprobe)
new_client->ops->reprobe(new_client->pdev);
set_audio_state(active->id, VGA_SWITCHEROO_OFF);
if (active->pwr_state == VGA_SWITCHEROO_ON)
vga_switchoff(active);
......@@ -275,13 +330,26 @@ static int vga_switchto_stage2(struct vga_switcheroo_client *new_client)
return 0;
}
static bool check_can_switch(void)
{
struct vga_switcheroo_client *client;
list_for_each_entry(client, &vgasr_priv.clients, list) {
if (!client->ops->can_switch(client->pdev)) {
printk(KERN_ERR "vga_switcheroo: client %x refused switch\n", client->id);
return false;
}
}
return true;
}
static ssize_t
vga_switcheroo_debugfs_write(struct file *filp, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
char usercmd[64];
const char *pdev_name;
int i, ret;
int ret;
bool delay = false, can_switch;
bool just_mux = false;
int client_id = -1;
......@@ -302,21 +370,21 @@ vga_switcheroo_debugfs_write(struct file *filp, const char __user *ubuf,
/* pwr off the device not in use */
if (strncmp(usercmd, "OFF", 3) == 0) {
for (i = 0; i < VGA_SWITCHEROO_MAX_CLIENTS; i++) {
if (vgasr_priv.clients[i].active)
list_for_each_entry(client, &vgasr_priv.clients, list) {
if (client->active)
continue;
if (vgasr_priv.clients[i].pwr_state == VGA_SWITCHEROO_ON)
vga_switchoff(&vgasr_priv.clients[i]);
if (client->pwr_state == VGA_SWITCHEROO_ON)
vga_switchoff(client);
}
goto out;
}
/* pwr on the device not in use */
if (strncmp(usercmd, "ON", 2) == 0) {
for (i = 0; i < VGA_SWITCHEROO_MAX_CLIENTS; i++) {
if (vgasr_priv.clients[i].active)
list_for_each_entry(client, &vgasr_priv.clients, list) {
if (client->active)
continue;
if (vgasr_priv.clients[i].pwr_state == VGA_SWITCHEROO_OFF)
vga_switchon(&vgasr_priv.clients[i]);
if (client->pwr_state == VGA_SWITCHEROO_OFF)
vga_switchon(client);
}
goto out;
}
......@@ -349,13 +417,9 @@ vga_switcheroo_debugfs_write(struct file *filp, const char __user *ubuf,
if (client_id == -1)
goto out;
for (i = 0; i < VGA_SWITCHEROO_MAX_CLIENTS; i++) {
if (vgasr_priv.clients[i].id == client_id) {
client = &vgasr_priv.clients[i];
break;
}
}
client = find_client_from_id(&vgasr_priv.clients, client_id);
if (!client)
goto out;
vgasr_priv.delayed_switch_active = false;
......@@ -364,23 +428,16 @@ vga_switcheroo_debugfs_write(struct file *filp, const char __user *ubuf,
goto out;
}
if (client->active == true)
if (client->active)
goto out;
/* okay we want a switch - test if devices are willing to switch */
can_switch = true;
for (i = 0; i < VGA_SWITCHEROO_MAX_CLIENTS; i++) {
can_switch = vgasr_priv.clients[i].can_switch(vgasr_priv.clients[i].pdev);
if (can_switch == false) {
printk(KERN_ERR "vga_switcheroo: client %d refused switch\n", i);
break;
}
}
can_switch = check_can_switch();
if (can_switch == false && delay == false)
goto out;
if (can_switch == true) {
if (can_switch) {
pdev_name = pci_name(client->pdev);
ret = vga_switchto_stage1(client);
if (ret)
......@@ -452,10 +509,8 @@ static int vga_switcheroo_debugfs_init(struct vgasr_priv *priv)
int vga_switcheroo_process_delayed_switch(void)
{
struct vga_switcheroo_client *client = NULL;
struct vga_switcheroo_client *client;
const char *pdev_name;
bool can_switch = true;
int i;
int ret;
int err = -EINVAL;
......@@ -465,17 +520,9 @@ int vga_switcheroo_process_delayed_switch(void)
printk(KERN_INFO "vga_switcheroo: processing delayed switch to %d\n", vgasr_priv.delayed_client_id);
for (i = 0; i < VGA_SWITCHEROO_MAX_CLIENTS; i++) {
if (vgasr_priv.clients[i].id == vgasr_priv.delayed_client_id)
client = &vgasr_priv.clients[i];
can_switch = vgasr_priv.clients[i].can_switch(vgasr_priv.clients[i].pdev);
if (can_switch == false) {
printk(KERN_ERR "vga_switcheroo: client %d refused switch\n", i);
break;
}
}
if (can_switch == false || client == NULL)
client = find_client_from_id(&vgasr_priv.clients,
vgasr_priv.delayed_client_id);
if (!client || !check_can_switch())
goto err;
pdev_name = pci_name(client->pdev);
......
......@@ -28,13 +28,19 @@ struct vga_switcheroo_handler {
int (*get_client_id)(struct pci_dev *pdev);
};
struct vga_switcheroo_client_ops {
void (*set_gpu_state)(struct pci_dev *dev, enum vga_switcheroo_state);
void (*reprobe)(struct pci_dev *dev);
bool (*can_switch)(struct pci_dev *dev);
};
#if defined(CONFIG_VGA_SWITCHEROO)
void vga_switcheroo_unregister_client(struct pci_dev *dev);
int vga_switcheroo_register_client(struct pci_dev *dev,
void (*set_gpu_state)(struct pci_dev *dev, enum vga_switcheroo_state),
void (*reprobe)(struct pci_dev *dev),
bool (*can_switch)(struct pci_dev *dev));
const struct vga_switcheroo_client_ops *ops);
int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
const struct vga_switcheroo_client_ops *ops,
int id, bool active);
void vga_switcheroo_client_fb_set(struct pci_dev *dev,
struct fb_info *info);
......@@ -48,11 +54,12 @@ int vga_switcheroo_process_delayed_switch(void);
static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {}
static inline int vga_switcheroo_register_client(struct pci_dev *dev,
void (*set_gpu_state)(struct pci_dev *dev, enum vga_switcheroo_state),
void (*reprobe)(struct pci_dev *dev),
bool (*can_switch)(struct pci_dev *dev)) { return 0; }
const struct vga_switcheroo_client_ops *ops) { return 0; }
static inline void vga_switcheroo_client_fb_set(struct pci_dev *dev, struct fb_info *info) {}
static inline int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler) { return 0; }
static inline int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
const struct vga_switcheroo_client_ops *ops,
int id, bool active) { return 0; }
static inline void vga_switcheroo_unregister_handler(void) {}
static inline int vga_switcheroo_process_delayed_switch(void) { return 0; }
......
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