drm/i915: Move iCLKIP readout to the pch code

Move the lpt_get_iclkip() call from hsw_crt_get_config()
since that's where we have the lpt_program_iclkip() call
as well.

Tehcnically this isn't perhaps quite right since iCLKIP
is providing the CRT dotclock. So one can argue all of
it should be directly in intel_crt.c. But since the CRT
port is the only one on the PCH sticking it all into the
PCH code seems OK.

Cc: Dave Airlie <airlied@redhat.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211015071625.593-7-ville.syrjala@linux.intel.comReviewed-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/i915/display/intel_crt.c

@@ -145,8 +145,6 @@ static void intel_crt_get_config(struct intel_encoder *encoder,
 static void hsw_crt_get_config(struct intel_encoder *encoder,
 			       struct intel_crtc_state *pipe_config)
 {
-	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-
 	lpt_pch_get_config(pipe_config);
 
 	hsw_ddi_get_config(encoder, pipe_config);
@@ -156,8 +154,6 @@ static void hsw_crt_get_config(struct intel_encoder *encoder,
 					      DRM_MODE_FLAG_PVSYNC |
 					      DRM_MODE_FLAG_NVSYNC);
 	pipe_config->hw.adjusted_mode.flags |= intel_crt_get_flags(encoder);
-
-	pipe_config->hw.adjusted_mode.crtc_clock = lpt_get_iclkip(dev_priv);
 }
 
 /* Note: The caller is required to filter out dpms modes not supported by the

drivers/gpu/drm/i915/display/intel_ddi.c

@@ -321,10 +321,11 @@ static void ddi_dotclock_get(struct intel_crtc_state *pipe_config)
 {
 	int dotclock;
 
+	/* CRT dotclock is determined via other means */
 	if (pipe_config->has_pch_encoder)
-		dotclock = intel_dotclock_calculate(pipe_config->port_clock,
-						    &pipe_config->fdi_m_n);
-	else if (intel_crtc_has_dp_encoder(pipe_config))
+		return;
+
+	if (intel_crtc_has_dp_encoder(pipe_config))
 		dotclock = intel_dotclock_calculate(pipe_config->port_clock,
 						    &pipe_config->dp_m_n);
 	else if (pipe_config->has_hdmi_sink && pipe_config->pipe_bpp > 24)

drivers/gpu/drm/i915/display/intel_pch_display.c

@@ -451,4 +451,6 @@ void lpt_pch_get_config(struct intel_crtc_state *crtc_state)
 				 FDI_DP_PORT_WIDTH_SHIFT) + 1;
 
 	ilk_get_fdi_m_n_config(crtc, crtc_state);
+
+	crtc_state->hw.adjusted_mode.crtc_clock = lpt_get_iclkip(dev_priv);
 }