From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
LPT/WPT only have PCH transcoder A. Make sure we poke at its
chicken register instead of some non-existent register when
FDI is being driven by pipe B or C.
Cc: Uma Shankar <uma.shankar@xxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_display.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 53dc310a5f6d..f99dbc3d9696 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -17272,7 +17272,8 @@ static void intel_sanitize_frame_start_delay(const struct intel_crtc_state *crtc
val |= TRANS_FRAME_START_DELAY(0);
I915_WRITE(reg, val);
} else {
- i915_reg_t reg = TRANS_CHICKEN2(crtc->pipe);
+ enum pipe pch_transcoder = intel_crtc_pch_transcoder(crtc);
+ i915_reg_t reg = TRANS_CHICKEN2(pch_transcoder);
u32 val;
val = I915_READ(reg);
--
2.23.0
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