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path: root/drivers/gpu/vga/vga_switcheroo.c
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Diffstat (limited to 'drivers/gpu/vga/vga_switcheroo.c')
-rw-r--r--drivers/gpu/vga/vga_switcheroo.c95
1 files changed, 56 insertions, 39 deletions
diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index 37ac7b5db..21060668f 100644
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -6,17 +6,19 @@
* Licensed under GPLv2
*
* vga_switcheroo.c - Support for laptop with dual GPU using one set of outputs
-
- Switcher interface - methods require for ATPX and DCM
- - switchto - this throws the output MUX switch
- - discrete_set_power - sets the power state for the discrete card
-
- GPU driver interface
- - set_gpu_state - this should do the equiv of s/r for the card
- - this should *not* set the discrete power state
- - switch_check - check if the device is in a position to switch now
+ *
+ * Switcher interface - methods require for ATPX and DCM
+ * - switchto - this throws the output MUX switch
+ * - discrete_set_power - sets the power state for the discrete card
+ *
+ * GPU driver interface
+ * - set_gpu_state - this should do the equiv of s/r for the card
+ * - this should *not* set the discrete power state
+ * - switch_check - check if the device is in a position to switch now
*/
+#define pr_fmt(fmt) "vga_switcheroo: " fmt
+
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>
@@ -111,7 +113,7 @@ int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler)
vgasr_priv.handler = handler;
if (vga_switcheroo_ready()) {
- printk(KERN_INFO "vga_switcheroo: enabled\n");
+ pr_info("enabled\n");
vga_switcheroo_enable();
}
mutex_unlock(&vgasr_mutex);
@@ -124,7 +126,7 @@ void vga_switcheroo_unregister_handler(void)
mutex_lock(&vgasr_mutex);
vgasr_priv.handler = NULL;
if (vgasr_priv.active) {
- pr_info("vga_switcheroo: disabled\n");
+ pr_info("disabled\n");
vga_switcheroo_debugfs_fini(&vgasr_priv);
vgasr_priv.active = false;
}
@@ -155,7 +157,7 @@ static int register_client(struct pci_dev *pdev,
vgasr_priv.registered_clients++;
if (vga_switcheroo_ready()) {
- printk(KERN_INFO "vga_switcheroo: enabled\n");
+ pr_info("enabled\n");
vga_switcheroo_enable();
}
mutex_unlock(&vgasr_mutex);
@@ -167,7 +169,8 @@ int vga_switcheroo_register_client(struct pci_dev *pdev,
bool driver_power_control)
{
return register_client(pdev, ops, -1,
- pdev == vga_default_device(), driver_power_control);
+ pdev == vga_default_device(),
+ driver_power_control);
}
EXPORT_SYMBOL(vga_switcheroo_register_client);
@@ -183,6 +186,7 @@ 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;
@@ -193,6 +197,7 @@ 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;
@@ -203,6 +208,7 @@ 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;
@@ -235,7 +241,7 @@ void vga_switcheroo_unregister_client(struct pci_dev *pdev)
kfree(client);
}
if (vgasr_priv.active && vgasr_priv.registered_clients < 2) {
- printk(KERN_INFO "vga_switcheroo: disabled\n");
+ pr_info("disabled\n");
vga_switcheroo_debugfs_fini(&vgasr_priv);
vgasr_priv.active = false;
}
@@ -260,10 +266,12 @@ static int vga_switcheroo_show(struct seq_file *m, void *v)
{
struct vga_switcheroo_client *client;
int i = 0;
+
mutex_lock(&vgasr_mutex);
list_for_each_entry(client, &vgasr_priv.clients, list) {
seq_printf(m, "%d:%s%s:%c:%s%s:%s\n", i,
- client_id(client) == VGA_SWITCHEROO_DIS ? "DIS" : "IGD",
+ client_id(client) == VGA_SWITCHEROO_DIS ? "DIS" :
+ "IGD",
client_is_vga(client) ? "" : "-Audio",
client->active ? '+' : ' ',
client->driver_power_control ? "Dyn" : "",
@@ -347,6 +355,7 @@ static int vga_switchto_stage2(struct vga_switcheroo_client *new_client)
if (new_client->fb_info) {
struct fb_event event;
+
console_lock();
event.info = new_client->fb_info;
fb_notifier_call_chain(FB_EVENT_REMAP_ALL_CONSOLE, &event);
@@ -375,7 +384,7 @@ static bool check_can_switch(void)
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);
+ pr_err("client %x refused switch\n", client->id);
return false;
}
}
@@ -484,20 +493,20 @@ vga_switcheroo_debugfs_write(struct file *filp, const char __user *ubuf,
if (can_switch) {
ret = vga_switchto_stage1(client);
if (ret)
- printk(KERN_ERR "vga_switcheroo: switching failed stage 1 %d\n", ret);
+ pr_err("switching failed stage 1 %d\n", ret);
ret = vga_switchto_stage2(client);
if (ret)
- printk(KERN_ERR "vga_switcheroo: switching failed stage 2 %d\n", ret);
+ pr_err("switching failed stage 2 %d\n", ret);
} else {
- printk(KERN_INFO "vga_switcheroo: setting delayed switch to client %d\n", client->id);
+ pr_info("setting delayed switch to client %d\n", client->id);
vgasr_priv.delayed_switch_active = true;
vgasr_priv.delayed_client_id = client_id;
ret = vga_switchto_stage1(client);
if (ret)
- printk(KERN_ERR "vga_switcheroo: delayed switching stage 1 failed %d\n", ret);
+ pr_err("delayed switching stage 1 failed %d\n", ret);
}
out:
@@ -516,32 +525,32 @@ static const struct file_operations vga_switcheroo_debugfs_fops = {
static void vga_switcheroo_debugfs_fini(struct vgasr_priv *priv)
{
- if (priv->switch_file) {
- debugfs_remove(priv->switch_file);
- priv->switch_file = NULL;
- }
- if (priv->debugfs_root) {
- debugfs_remove(priv->debugfs_root);
- priv->debugfs_root = NULL;
- }
+ debugfs_remove(priv->switch_file);
+ priv->switch_file = NULL;
+
+ debugfs_remove(priv->debugfs_root);
+ priv->debugfs_root = NULL;
}
static int vga_switcheroo_debugfs_init(struct vgasr_priv *priv)
{
+ static const char mp[] = "/sys/kernel/debug";
+
/* already initialised */
if (priv->debugfs_root)
return 0;
priv->debugfs_root = debugfs_create_dir("vgaswitcheroo", NULL);
if (!priv->debugfs_root) {
- printk(KERN_ERR "vga_switcheroo: Cannot create /sys/kernel/debug/vgaswitcheroo\n");
+ pr_err("Cannot create %s/vgaswitcheroo\n", mp);
goto fail;
}
priv->switch_file = debugfs_create_file("switch", 0644,
- priv->debugfs_root, NULL, &vga_switcheroo_debugfs_fops);
+ priv->debugfs_root, NULL,
+ &vga_switcheroo_debugfs_fops);
if (!priv->switch_file) {
- printk(KERN_ERR "vga_switcheroo: cannot create /sys/kernel/debug/vgaswitcheroo/switch\n");
+ pr_err("cannot create %s/vgaswitcheroo/switch\n", mp);
goto fail;
}
return 0;
@@ -560,7 +569,8 @@ int vga_switcheroo_process_delayed_switch(void)
if (!vgasr_priv.delayed_switch_active)
goto err;
- printk(KERN_INFO "vga_switcheroo: processing delayed switch to %d\n", vgasr_priv.delayed_client_id);
+ pr_info("processing delayed switch to %d\n",
+ vgasr_priv.delayed_client_id);
client = find_client_from_id(&vgasr_priv.clients,
vgasr_priv.delayed_client_id);
@@ -569,7 +579,7 @@ int vga_switcheroo_process_delayed_switch(void)
ret = vga_switchto_stage2(client);
if (ret)
- printk(KERN_ERR "vga_switcheroo: delayed switching failed stage 2 %d\n", ret);
+ pr_err("delayed switching failed stage 2 %d\n", ret);
vgasr_priv.delayed_switch_active = false;
err = 0;
@@ -579,7 +589,8 @@ err:
}
EXPORT_SYMBOL(vga_switcheroo_process_delayed_switch);
-static void vga_switcheroo_power_switch(struct pci_dev *pdev, enum vga_switcheroo_state state)
+static void vga_switcheroo_power_switch(struct pci_dev *pdev,
+ enum vga_switcheroo_state state)
{
struct vga_switcheroo_client *client;
@@ -598,7 +609,8 @@ static void vga_switcheroo_power_switch(struct pci_dev *pdev, enum vga_switchero
/* force a PCI device to a certain state - mainly to turn off audio clients */
-void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum vga_switcheroo_state dynamic)
+void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev,
+ enum vga_switcheroo_state dynamic)
{
struct vga_switcheroo_client *client;
@@ -644,7 +656,8 @@ static int vga_switcheroo_runtime_resume(struct device *dev)
/* this version is for the case where the power switch is separate
to the device being powered down. */
-int vga_switcheroo_init_domain_pm_ops(struct device *dev, struct dev_pm_domain *domain)
+int vga_switcheroo_init_domain_pm_ops(struct device *dev,
+ struct dev_pm_domain *domain)
{
/* copy over all the bus versions */
if (dev->bus && dev->bus->pm) {
@@ -675,7 +688,8 @@ static int vga_switcheroo_runtime_resume_hdmi_audio(struct device *dev)
/* we need to check if we have to switch back on the video
device so the audio device can come back */
list_for_each_entry(client, &vgasr_priv.clients, list) {
- if (PCI_SLOT(client->pdev->devfn) == PCI_SLOT(pdev->devfn) && client_is_vga(client)) {
+ if (PCI_SLOT(client->pdev->devfn) == PCI_SLOT(pdev->devfn) &&
+ client_is_vga(client)) {
found = client;
ret = pm_runtime_get_sync(&client->pdev->dev);
if (ret) {
@@ -695,12 +709,15 @@ static int vga_switcheroo_runtime_resume_hdmi_audio(struct device *dev)
return ret;
}
-int vga_switcheroo_init_domain_pm_optimus_hdmi_audio(struct device *dev, struct dev_pm_domain *domain)
+int
+vga_switcheroo_init_domain_pm_optimus_hdmi_audio(struct device *dev,
+ struct dev_pm_domain *domain)
{
/* copy over all the bus versions */
if (dev->bus && dev->bus->pm) {
domain->ops = *dev->bus->pm;
- domain->ops.runtime_resume = vga_switcheroo_runtime_resume_hdmi_audio;
+ domain->ops.runtime_resume =
+ vga_switcheroo_runtime_resume_hdmi_audio;
dev->pm_domain = domain;
return 0;