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| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2011-07-07 11:10:59 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-07-07 13:38:40 -0700 |
| commit | 59cd09e1aea3ac6eb15b45e5d2261a63ecb1799c (patch) | |
| tree | 89e76b57e1b722d35f84bb3fbe474eb7c1e46d57 /drivers/gpu | |
| parent | 7183dc2912510cf005fcc59239f8d153ef51d3f0 (diff) | |
| download | linux-3.10-59cd09e1aea3ac6eb15b45e5d2261a63ecb1799c.tar.gz linux-3.10-59cd09e1aea3ac6eb15b45e5d2261a63ecb1799c.tar.bz2 linux-3.10-59cd09e1aea3ac6eb15b45e5d2261a63ecb1799c.zip | |
drm/i915/dp: read more receiver capability bits on hotplug
When a hotplug event is received, we need to check the receiver cap bits
in case they've changed (as they might with a hub or chain config).
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index fc51730b89d..a9a5051419d 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1522,6 +1522,8 @@ intel_dp_link_down(struct intel_dp *intel_dp) static void intel_dp_check_link_status(struct intel_dp *intel_dp) { + int ret; + if (!intel_dp->base.base.crtc) return; @@ -1530,6 +1532,15 @@ intel_dp_check_link_status(struct intel_dp *intel_dp) return; } + /* Try to read receiver status if the link appears to be up */ + ret = intel_dp_aux_native_read(intel_dp, + 0x000, intel_dp->dpcd, + sizeof (intel_dp->dpcd)); + if (ret != sizeof(intel_dp->dpcd)) { + intel_dp_link_down(intel_dp); + return; + } + if (!intel_channel_eq_ok(intel_dp)) { intel_dp_start_link_train(intel_dp); intel_dp_complete_link_train(intel_dp); |