From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
G4x cursor control registers still allow us to write to the pipe select
bits even though cursors are supposed to be fixed to a specific pipe.
Bspec tells us that we should only ever write 0 to these bits. Let's
follow that recommendation. On ilk+ the bits become hardwired to 0.
Also looks like ICL repurposes these bits for some other use, so
we had better stop setting them to bogus values there.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index af659d25943b..cccc1126f1d5 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9532,7 +9532,8 @@ static u32 i9xx_cursor_ctl(const struct intel_crtc_state *crtc_state,
if (HAS_DDI(dev_priv))
cntl |= CURSOR_PIPE_CSC_ENABLE;
- cntl |= MCURSOR_PIPE_SELECT(crtc->pipe);
+ if (INTEL_GEN(dev_priv) < 5 && !IS_G4X(dev_priv))
+ cntl |= MCURSOR_PIPE_SELECT(crtc->pipe);
switch (plane_state->base.crtc_w) {
case 64:
--
2.13.6
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