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vga_switcheroo: add debugging mux switch option. 

This allows the mux to be switched from userspace using MIGD/MDIS
command to the switch.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2010-12-06 12:35:52 +10:00
parent 5cfb3c3a10
commit 851ab954da
1 changed files with 16 additions and 0 deletions
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16
drivers/gpu/vga/vga_switcheroo.c
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@ -266,6 +266,7 @@ vga_switcheroo_debugfs_write(struct file *filp, const char __user *ubuf,
const char *pdev_name;
int i, ret;
bool delay = false, can_switch;
bool just_mux = false;
int client_id = -1;
struct vga_switcheroo_client *client = NULL;
@ -320,6 +321,15 @@ vga_switcheroo_debugfs_write(struct file *filp, const char __user *ubuf,
if (strncmp(usercmd, "DIS", 3) == 0)
client_id = VGA_SWITCHEROO_DIS;
if (strncmp(usercmd, "MIGD", 3) == 0) {
just_mux = true;
client_id = VGA_SWITCHEROO_IGD;
}
if (strncmp(usercmd, "MDIS", 3) == 0) {
just_mux = true;
client_id = VGA_SWITCHEROO_DIS;
}
if (client_id == -1)
goto out;
@ -331,6 +341,12 @@ vga_switcheroo_debugfs_write(struct file *filp, const char __user *ubuf,
}
vgasr_priv.delayed_switch_active = false;
if (just_mux) {
ret = vgasr_priv.handler->switchto(client_id);
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++) {