From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
No point in calling intel_plane_restore() in .set_property() if the
value didn't change.
More importantly this papers over a bug where the current primary plane
code forgets to update the user coordinates we store under intel_plane
unless the primary plane .update_plane() hook is actually called. This
means we have 0 in the coordinates straight after boot and any call
to intel_restore_plane() (such as from restore_fbdev_mode()) will
actually turn off the primary plane. This mess needs to be fixed properly
but that's a bigger task and the first step there is killing off
intel_pipe_set_base() and just calling the primary plane
.update_plane() hook. For the immediate problem of black screen after
boot this small patch is enough to hide it.
The problem originates from these two commits:
commit 3a5f87c286515c54ff5c52c3e64d0c522b7570c0
Author: Thomas Wood <thomas.wood@xxxxxxxxx>
Date: Wed Aug 20 14:45:00 2014 +0100
drm: fix plane rotation when restoring fbdev configuration
commit d91a2cb8e5104233c02bbde539bd4ee455ec12ac
Author: Sonika Jindal <sonika.jindal@xxxxxxxxx>
Date: Fri Aug 22 14:06:04 2014 +0530
drm/i915: Add 180 degree primary plane rotation support
Cc: Thomas Wood <thomas.wood@xxxxxxxxx>
Cc: Sonika Jindal <sonika.jindal@xxxxxxxxx>
Tested-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_sprite.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index fd5f271..cf596cd 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -1232,6 +1232,9 @@ int intel_plane_set_property(struct drm_plane *plane,
if (hweight32(val & 0xf) != 1)
return -EINVAL;
+ if (intel_plane->rotation == val)
+ return 0;
+
old_val = intel_plane->rotation;
intel_plane->rotation = val;
ret = intel_plane_restore(plane);
--
1.8.5.5
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