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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-11-29 15:59:34 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-12-06 14:37:00 +0100 |
| commit | ff50afe9aceb6264a4fbe40459da75170fb9a2a2 (patch) | |
| tree | afc80556f0d6fa7b77502f6f0de0660108004e53 /drivers/gpu/drm/i915/intel_dp.c | |
| parent | ab527efc2feadcab1cad0740be307cb4153b493f (diff) | |
| download | blackbird-op-linux-ff50afe9aceb6264a4fbe40459da75170fb9a2a2.tar.gz blackbird-op-linux-ff50afe9aceb6264a4fbe40459da75170fb9a2a2.zip | |
drm/i915: WARN on !crtc in intel_dp_link_down
This could have happened with the old crtc helper based modeset code,
but can't happen any longer with the new code.
Hence put in a WARN and adjust the comment. If no one hits this, we
can eventually remove it (like a few other such cases across our
code).
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 89164c553b2d..84652ca3b161 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2098,15 +2098,10 @@ intel_dp_link_down(struct intel_dp *intel_dp) /* Changes to enable or select take place the vblank * after being written. */ - if (crtc == NULL) { - /* We can arrive here never having been attached - * to a CRTC, for instance, due to inheriting - * random state from the BIOS. - * - * If the pipe is not running, play safe and - * wait for the clocks to stabilise before - * continuing. - */ + if (WARN_ON(crtc == NULL)) { + /* We should never try to disable a port without a crtc + * attached. For paranoia keep the code around for a + * bit. */ POSTING_READ(intel_dp->output_reg); msleep(50); } else |
