From: Seth Forshee <seth.forshee@xxxxxxxxxxxxx> The gmux allows muxing the DDC independently from the display, so support this functionality. This will allow reading the EDID for the inactive GPU, fixing issues with machines that either don't have a VBT or have invalid mode data in the VBT. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=88861 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=61115 Tested-by: Paul Hordiienko <pvt.gord@xxxxxxxxx> [MBP 6,2 2010 intel ILK + nvidia GT216 pre-retina] Tested-by: William Brown <william@xxxxxxxxxxxxxxxx> [MBP 8,2 2011 intel SNB + amd turks pre-retina] Tested-by: Lukas Wunner <lukas@xxxxxxxxx> [MBP 9,1 2012 intel IVB + nvidia GK107 pre-retina] Tested-by: Bruno Bierbaumer <bruno@xxxxxxxxxxxxxx> [MBP 11,3 2013 intel HSW + nvidia GK107 retina -- work in progress] Signed-off-by: Seth Forshee <seth.forshee@xxxxxxxxxxxxx> Signed-off-by: Dave Airlie <airlied@xxxxxxxxx> Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx> --- drivers/platform/x86/apple-gmux.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c index 0dec3f5..f0a55a4 100644 --- a/drivers/platform/x86/apple-gmux.c +++ b/drivers/platform/x86/apple-gmux.c @@ -273,14 +273,21 @@ 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) { - gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_DDC, 1); gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_DISPLAY, 2); gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_EXTERNAL, 2); } else { - gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_DDC, 2); gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_DISPLAY, 3); gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_EXTERNAL, 3); } @@ -347,6 +354,7 @@ gmux_active_client(struct apple_gmux_data *gmux_data) } static struct vga_switcheroo_handler gmux_handler = { + .switch_ddc = gmux_switch_ddc, .switchto = gmux_switchto, .power_state = gmux_set_power_state, .get_client_id = gmux_get_client_id, -- 1.8.5.2 (Apple Git-48) _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
