We can switch DDC pins in a way that ought (with luck) to work for LVDS.
This isn't sufficient for eDP, which is addressed in later patches.
Signed-off-by: Matthew Garrett <matthew.garrett at nebula.com>
---
drivers/platform/x86/apple-gmux.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/platform/x86/apple-gmux.c
b/drivers/platform/x86/apple-gmux.c
index b9429fb..5594cbc 100644
--- a/drivers/platform/x86/apple-gmux.c
+++ b/drivers/platform/x86/apple-gmux.c
@@ -271,6 +271,16 @@ static const struct backlight_ops gmux_bl_ops = {
.update_status = gmux_update_status,
};
+static int gmux_switch_ddc(enum vga_switcheroo_client_id id)
+{
+ if (id == VGA_SWITCHEROO_IGD)
+ gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_DDC, 1);
+ else
+ gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_DDC, 2);
+
+ return 0;
+}
+
static int gmux_switchto(enum vga_switcheroo_client_id id)
{
if (id == VGA_SWITCHEROO_IGD) {
@@ -346,6 +356,7 @@ gmux_active_client(struct apple_gmux_data *gmux_data)
static struct vga_switcheroo_handler gmux_handler = {
.switchto = gmux_switchto,
+ .switch_ddc = gmux_switch_ddc,
.power_state = gmux_set_power_state,
.get_client_id = gmux_get_client_id,
};
--
1.8.5.3
