diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2013-03-31 14:18:39 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2013-03-31 14:18:39 +0000 |
| commit | d5317b4a4275b1f225bc9c96c0624448ad7b972b (patch) | |
| tree | f77e522997f432189cf92e4991e3795eaa42bc9d /sys | |
| parent | 41f384eeba90a51783b200ccd598f48e3baca7f6 (diff) | |
Resort to I2C bit-banging on the SDVO port like Linux does. Using GMBUS simply
doesn't work reliably. On some machines you can talk to the SDVO chip, but
not to the DDC channel associated with it. On others ou can't even reliably
communicate with the SDVO chip.
Might make all sorts of digital video ports (DVI, HDMI) work. Some systems
need further changes to adjust timings in the I2C bit-banging code.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/dev/pci/drm/i915/intel_sdvo.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/sys/dev/pci/drm/i915/intel_sdvo.c b/sys/dev/pci/drm/i915/intel_sdvo.c index 4c912ee8d50..7899b73be53 100644 --- a/sys/dev/pci/drm/i915/intel_sdvo.c +++ b/sys/dev/pci/drm/i915/intel_sdvo.c @@ -1,4 +1,4 @@ -/* $OpenBSD: intel_sdvo.c,v 1.5 2013/03/31 08:32:43 kettenis Exp $ */ +/* $OpenBSD: intel_sdvo.c,v 1.6 2013/03/31 14:18:38 kettenis Exp $ */ /* * Copyright 2006 Dave Airlie <airlied@linux.ie> * Copyright © 2006-2007 Intel Corporation @@ -2318,21 +2318,17 @@ intel_sdvo_select_i2c_bus(struct inteldrm_softc *dev_priv, sdvo->i2c = intel_gmbus_get_adapter(dev_priv, pin); -#ifdef notyet /* With gmbus we should be able to drive sdvo i2c at 2MHz, but somehow * our code totally fails once we start using gmbus. Hence fall back to * bit banging for now. */ intel_gmbus_force_bit(sdvo->i2c, true); -#endif } /* undo any changes intel_sdvo_select_i2c_bus() did to sdvo->i2c */ void intel_sdvo_unselect_i2c_bus(struct intel_sdvo *sdvo) { -#ifdef notyet intel_gmbus_force_bit(sdvo->i2c, false); -#endif } bool |