On Sun, Jun 1, 2014 at 12:38 PM, Matthew Garrett matthew.garrett@nebula.com wrote:
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@nebula.com
FWIW, on AMD muxed PX systems, there are separate muxes for ddc/hpd and data lines so it would be trivial to implement there as well.
Alex
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);elsegmux_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
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