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Dave Airlie 4a9a8b71e1 drm/radeon: workaround a hw bug on some radeon chipsets with all-0 EDIDs. 
Some RS690 chipsets seem to end up with floating connectors, either
a DVI connector isn't actually populated, or an add-in HDMI card
is available but not installed. In this case we seem to get a NULL byte
response for each byte of the i2c transaction, so we detect this
case and if we see it we don't do anymore DDC transactions on this
connector.

I've tested this on my RS690 without the HDMI card installed and
it seems to work fine.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
 		2011-06-16 16:30:54 +10:00
..
i2c drm: Import driver for the sil164 I2C TMDS transmitter. 2010-08-02 10:21:13 +10:00
ttm Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6 2011-04-07 11:14:49 -07:00
Kbuild drm: remove i830 driver 2011-02-07 12:14:18 +10:00
drm.h drm/vblank: update recently added vbl interface to be more future proof. 2011-03-24 21:28:46 +10:00
drmP.h drm: Export the command-line mode parser 2011-04-28 14:56:23 +10:00
drm_buffer.h drm: Add generic multipart buffer. 2010-02-23 09:46:20 +10:00
drm_cache.h drm/ttm: consolidate cache flushing code in one place. 2009-08-27 09:53:47 +10:00
drm_core.h drm: Fix support for PCI domains 2010-08-10 08:20:20 +10:00
drm_crtc.h drm/radeon: workaround a hw bug on some radeon chipsets with all-0 EDIDs. 2011-06-16 16:30:54 +10:00
drm_crtc_helper.h drm, kdb, kms: Change mode_set_base_atomic() enter argument to be an enum 2010-10-19 14:13:33 +10:00
drm_dp_helper.h drm/dp: add some new DP regs for DP 1.2 2011-05-20 20:02:29 +10:00
drm_edid.h drm: parse color format support for digital displays 2011-04-28 14:44:56 +10:00
drm_encoder_slave.h drm/kms: no need to return void value (encoder) 2009-08-19 16:06:49 +10:00
drm_fb_helper.h drm: Take lock around probes for drm_fb_helper_hotplug_event 2011-05-16 12:01:43 +10:00
drm_fixed.h drm: move radeon_fixed.h to shared drm_fixed.h header 2010-05-18 18:21:33 +10:00
drm_global.h drm: move ttm global code to core drm 2010-08-04 09:46:06 +10:00
drm_hashtab.h drm: Remove unused members from struct drm_open_hash 2011-02-23 11:16:40 +10:00
drm_mem_util.h drm/ttm: use drm calloc large and free large 2010-03-15 10:31:43 +10:00
drm_memory.h includecheck fix: include/drm, drm_memory.h 2009-09-20 16:02:58 +05:30
drm_mm.h drm: mm: fix debug output 2011-05-09 09:14:45 +10:00
drm_mode.h Fix common misspellings 2011-03-31 11:26:23 -03:00
drm_os_linux.h drm/i915: add i915_lp_ring_sync helper 2009-11-05 14:47:07 -08:00
drm_pciids.h drm/radeon/kms: add llano pci ids 2011-06-02 10:47:39 +10:00
drm_sarea.h drm: move to kref per-master structures. 2008-12-29 17:47:22 +10:00
drm_sman.h
…
drm_sysfs.h drm: Enable drm drivers to add drm sysfs devices. 2009-08-19 16:08:51 +10:00
drm_usb.h drm: add usb framework 2011-02-07 13:09:42 +10:00
i810_drm.h
…
i915_drm.h drm/i915: Allow relocation deltas outside of target bo 2011-03-01 16:01:02 +00:00
intel-gtt.h intel-gtt: export api for drm/i915 2010-11-23 20:14:47 +00:00
mga_drm.h Fix common misspellings 2011-03-31 11:26:23 -03:00
nouveau_drm.h drm/nv50: support for compression 2011-02-25 06:46:07 +10:00
r128_drm.h
…
radeon_drm.h drm/radeon/kms: fix gart setup on fusion parts (v2) 2011-05-04 10:16:40 +10:00
savage_drm.h Fix common misspellings 2011-03-31 11:26:23 -03:00
sis_drm.h
…
via_drm.h drm: Add compatibility #ifdefs for *BSD 2009-12-04 08:59:28 +10:00
vmwgfx_drm.h Fix common misspellings 2011-03-31 11:26:23 -03:00