From 32ea06b67eb2b693c78bd795b8a8f7fdac03fb6a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Tue, 30 Jan 2018 22:38:01 +0200
Subject: [PATCH] drm/i915: Don't set cursor pipe select bits on g4x+
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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@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180130203807.13721-1-ville.syrjala@linux.intel.com
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
---
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 3c479e3fd553f..a0d9b0ab6f251 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9540,7 +9540,8 @@ 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:
--
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