[Intel-gfx] [PATCH] drm/i915/dp: Boot timeout for enabling transcoder to 100ms

[Chris Wilson]

Adam Hill reported that his Arrandale system required a much longer, up
to 200x500us, wait for the panel to initialise or else modesetting would
fail.

References:

  https://bugs.freedesktop.org/show_bug.cgi?id=29141

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Reported-by: Adam Hill <sidepipeuk at yahoo.co.uk>
---
 drivers/gpu/drm/i915/intel_display.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 064b357..c8e51f3 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2060,7 +2060,7 @@ static int ironlake_crtc_dpms(struct drm_crtc *crtc, int mode)
 			temp |= pipe_bpc;
 			I915_WRITE(transconf_reg, temp | TRANS_ENABLE);
 
-			if (wait_for(I915_READ(transconf_reg) & TRANS_STATE_ENABLE, 10, 0))
+			if (wait_for(I915_READ(transconf_reg) & TRANS_STATE_ENABLE, 100, 1))
 				DRM_ERROR("failed to enable transcoder\n");
 		}
 
-- 
1.7.1