drm/i915: Extract intel_crtc_compute_pipe_mode()

Pull intel_crtc_compute_pipe_mode() out from
intel_crtc_compute_config(). Since it's semi related
we'll suck in the max dotclock/double wide checks in
as well.

And we'll pimp the debugs while at it.
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220223131315.18016-9-ville.syrjala@linux.intel.com

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

@@ -2836,17 +2836,12 @@ static int intel_crtc_compute_pipe_src(struct intel_crtc_state *crtc_state)
 	return 0;
 }
 
-static int intel_crtc_compute_config(struct intel_crtc *crtc,
-				     struct intel_crtc_state *crtc_state)
+static int intel_crtc_compute_pipe_mode(struct intel_crtc_state *crtc_state)
 {
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
 	struct drm_display_mode *pipe_mode = &crtc_state->hw.pipe_mode;
 	int clock_limit = i915->max_dotclk_freq;
-	int ret;
-
-	ret = intel_crtc_compute_pipe_src(crtc_state);
-	if (ret)
-		return ret;
 
 	drm_mode_copy(pipe_mode, &crtc_state->hw.adjusted_mode);
 
@@ -2872,12 +2867,29 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc,
 
 	if (pipe_mode->crtc_clock > clock_limit) {
 		drm_dbg_kms(&i915->drm,
-			    "requested pixel clock (%d kHz) too high (max: %d kHz, double wide: %s)\n",
+			    "[CRTC:%d:%s] requested pixel clock (%d kHz) too high (max: %d kHz, double wide: %s)\n",
+			    crtc->base.base.id, crtc->base.name,
 			    pipe_mode->crtc_clock, clock_limit,
 			    yesno(crtc_state->double_wide));
 		return -EINVAL;
 	}
 
+	return 0;
+}
+
+static int intel_crtc_compute_config(struct intel_crtc *crtc,
+				     struct intel_crtc_state *crtc_state)
+{
+	int ret;
+
+	ret = intel_crtc_compute_pipe_src(crtc_state);
+	if (ret)
+		return ret;
+
+	ret = intel_crtc_compute_pipe_mode(crtc_state);
+	if (ret)
+		return ret;
+
 	intel_crtc_compute_pixel_rate(crtc_state);
 
 	if (crtc_state->has_pch_encoder)