From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
With DPIO powergating active on CHV, we can't even access the DPIO PLL
registers until the lane power state overrides have been enabled. That
will happen from the encoder .pre_pll_enable() hook, so move
chv_prepare_pll() to happen after that point, which puts it just before
chv_enable_pll() actually.
Do the same for VLV to avoid accumulating weird differences between the
platforms. Both platforms seem happy with the new arrangement.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0473b38..666a236 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5979,13 +5979,6 @@ static void valleyview_crtc_enable(struct drm_crtc *crtc)
is_dsi = intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DSI);
- if (!is_dsi) {
- if (IS_CHERRYVIEW(dev))
- chv_prepare_pll(intel_crtc, intel_crtc->config);
- else
- vlv_prepare_pll(intel_crtc, intel_crtc->config);
- }
-
if (intel_crtc->config->has_dp_encoder)
intel_dp_set_m_n(intel_crtc, M1_N1);
@@ -6009,10 +6002,13 @@ static void valleyview_crtc_enable(struct drm_crtc *crtc)
encoder->pre_pll_enable(encoder);
if (!is_dsi) {
- if (IS_CHERRYVIEW(dev))
+ if (IS_CHERRYVIEW(dev)) {
+ chv_prepare_pll(intel_crtc, intel_crtc->config);
chv_enable_pll(intel_crtc, intel_crtc->config);
- else
+ } else {
+ vlv_prepare_pll(intel_crtc, intel_crtc->config);
vlv_enable_pll(intel_crtc, intel_crtc->config);
+ }
}
for_each_encoder_on_crtc(dev, crtc, encoder)
--
2.3.6
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