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Commit 851ab954 authored by Dave Airlie's avatar Dave Airlie
Browse files

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: default avatarDave Airlie <airlied@redhat.com>
parent 5cfb3c3a

drivers/gpu/vga/vga_switcheroo.c

+16 −0
Original line number Diff line number Diff line
@@ -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++) {