drm/i915: Move the SKL DPLL0 VCO computation into intel_dp_compute_config()
Shared plls won't get assigned until the .compute_clocks() hook gets
called, which happens from the crtc .atomic_check hook. That's too late
as the cdclk computation has already happened. So let's move the DPLL0
VCO computation into intel_dp_compute_config() so that it's done when
the cdclk computation happens. Also only do it for eDP since we only
pick DPLL0 for eDP.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463172100-24715-4-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com>
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index cccf9bc..8b67e0f 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1578,6 +1578,27 @@
&pipe_config->dp_m2_n2);
}
+ /*
+ * DPLL0 VCO may need to be adjusted to get the correct
+ * clock for eDP. This will affect cdclk as well.
+ */
+ if (is_edp(intel_dp) &&
+ (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))) {
+ int vco;
+
+ switch (pipe_config->port_clock / 2) {
+ case 108000:
+ case 216000:
+ vco = 8640;
+ break;
+ default:
+ vco = 8100;
+ break;
+ }
+
+ to_intel_atomic_state(pipe_config->base.state)->cdclk_pll_vco = vco;
+ }
+
if (!HAS_DDI(dev))
intel_dp_set_clock(encoder, pipe_config);