drm/i915: Consolidate HDMI force_dvi handling

Move the force_dvi check to a single function that can be called from
both mode validation and compute_config().
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200108181242.13650-2-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -2109,9 +2109,16 @@ static int intel_hdmi_source_max_tmds_clock(struct intel_encoder *encoder)
 	return max_tmds_clock;
 }
 
+static bool intel_has_hdmi_sink(struct intel_hdmi *hdmi,
+				const struct drm_connector_state *conn_state)
+{
+	return hdmi->has_hdmi_sink &&
+		READ_ONCE(to_intel_digital_connector_state(conn_state)->force_audio) != HDMI_AUDIO_OFF_DVI;
+}
+
 static int hdmi_port_clock_limit(struct intel_hdmi *hdmi,
 				 bool respect_downstream_limits,
-				 bool force_dvi)
+				 bool has_hdmi_sink)
 {
 	struct intel_encoder *encoder = &hdmi_to_dig_port(hdmi)->base;
 	int max_tmds_clock = intel_hdmi_source_max_tmds_clock(encoder);
@@ -2127,7 +2134,7 @@ static int hdmi_port_clock_limit(struct intel_hdmi *hdmi,
 		if (info->max_tmds_clock)
 			max_tmds_clock = min(max_tmds_clock,
 					     info->max_tmds_clock);
-		else if (!hdmi->has_hdmi_sink || force_dvi)
+		else if (!has_hdmi_sink)
 			max_tmds_clock = min(max_tmds_clock, 165000);
 	}
 
@@ -2137,13 +2144,14 @@ static int hdmi_port_clock_limit(struct intel_hdmi *hdmi,
 static enum drm_mode_status
 hdmi_port_clock_valid(struct intel_hdmi *hdmi,
 		      int clock, bool respect_downstream_limits,
-		      bool force_dvi)
+		      bool has_hdmi_sink)
 {
 	struct drm_i915_private *dev_priv = to_i915(intel_hdmi_to_dev(hdmi));
 
 	if (clock < 25000)
 		return MODE_CLOCK_LOW;
-	if (clock > hdmi_port_clock_limit(hdmi, respect_downstream_limits, force_dvi))
+	if (clock > hdmi_port_clock_limit(hdmi, respect_downstream_limits,
+					  has_hdmi_sink))
 		return MODE_CLOCK_HIGH;
 
 	/* BXT DPLL can't generate 223-240 MHz */
@@ -2165,16 +2173,13 @@ intel_hdmi_mode_valid(struct drm_connector *connector,
 	struct drm_device *dev = intel_hdmi_to_dev(hdmi);
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	enum drm_mode_status status;
-	int clock;
+	int clock = mode->clock;
 	int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
-	bool force_dvi =
-		READ_ONCE(to_intel_digital_connector_state(connector->state)->force_audio) == HDMI_AUDIO_OFF_DVI;
+	bool has_hdmi_sink = intel_has_hdmi_sink(hdmi, connector->state);
 
 	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 		return MODE_NO_DBLESCAN;
 
-	clock = mode->clock;
-
 	if ((mode->flags & DRM_MODE_FLAG_3D_MASK) == DRM_MODE_FLAG_3D_FRAME_PACKING)
 		clock *= 2;
 
@@ -2188,18 +2193,18 @@ intel_hdmi_mode_valid(struct drm_connector *connector,
 		clock /= 2;
 
 	/* check if we can do 8bpc */
-	status = hdmi_port_clock_valid(hdmi, clock, true, force_dvi);
+	status = hdmi_port_clock_valid(hdmi, clock, true, has_hdmi_sink);
 
-	if (hdmi->has_hdmi_sink && !force_dvi) {
+	if (has_hdmi_sink) {
 		/* if we can't do 8bpc we may still be able to do 12bpc */
 		if (status != MODE_OK && !HAS_GMCH(dev_priv))
 			status = hdmi_port_clock_valid(hdmi, clock * 3 / 2,
-						       true, force_dvi);
+						       true, has_hdmi_sink);
 
 		/* if we can't do 8,12bpc we may still be able to do 10bpc */
 		if (status != MODE_OK && INTEL_GEN(dev_priv) >= 11)
 			status = hdmi_port_clock_valid(hdmi, clock * 5 / 4,
-						       true, force_dvi);
+						       true, has_hdmi_sink);
 	}
 	if (status != MODE_OK)
 		return status;
@@ -2315,7 +2320,7 @@ static int intel_hdmi_port_clock(int clock, int bpc)
 
 static int intel_hdmi_compute_bpc(struct intel_encoder *encoder,
 				  struct intel_crtc_state *crtc_state,
-				  int clock, bool force_dvi)
+				  int clock)
 {
 	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 	int bpc;
@@ -2324,7 +2329,7 @@ static int intel_hdmi_compute_bpc(struct intel_encoder *encoder,
 		if (hdmi_deep_color_possible(crtc_state, bpc) &&
 		    hdmi_port_clock_valid(intel_hdmi,
 					  intel_hdmi_port_clock(clock, bpc),
-					  true, force_dvi) == MODE_OK)
+					  true, crtc_state->has_hdmi_sink) == MODE_OK)
 			return bpc;
 	}
 
@@ -2332,8 +2337,7 @@ static int intel_hdmi_compute_bpc(struct intel_encoder *encoder,
 }
 
 static int intel_hdmi_compute_clock(struct intel_encoder *encoder,
-				    struct intel_crtc_state *crtc_state,
-				    bool force_dvi)
+				    struct intel_crtc_state *crtc_state)
 {
 	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 	const struct drm_display_mode *adjusted_mode =
@@ -2347,8 +2351,7 @@ static int intel_hdmi_compute_clock(struct intel_encoder *encoder,
 	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
 		clock /= 2;
 
-	bpc = intel_hdmi_compute_bpc(encoder, crtc_state,
-				     clock, force_dvi);
+	bpc = intel_hdmi_compute_bpc(encoder, crtc_state, clock);
 
 	crtc_state->port_clock = intel_hdmi_port_clock(clock, bpc);
 
@@ -2364,7 +2367,7 @@ static int intel_hdmi_compute_clock(struct intel_encoder *encoder,
 		      bpc, crtc_state->pipe_bpp);
 
 	if (hdmi_port_clock_valid(intel_hdmi, crtc_state->port_clock,
-				  false, force_dvi) != MODE_OK) {
+				  false, crtc_state->has_hdmi_sink) != MODE_OK) {
 		DRM_DEBUG_KMS("unsupported HDMI clock (%d kHz), rejecting mode\n",
 			      crtc_state->port_clock);
 		return -EINVAL;
@@ -2412,14 +2415,14 @@ int intel_hdmi_compute_config(struct intel_encoder *encoder,
 	struct drm_scdc *scdc = &connector->display_info.hdmi.scdc;
 	struct intel_digital_connector_state *intel_conn_state =
 		to_intel_digital_connector_state(conn_state);
-	bool force_dvi = intel_conn_state->force_audio == HDMI_AUDIO_OFF_DVI;
 	int ret;
 
 	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
 		return -EINVAL;
 
 	pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
-	pipe_config->has_hdmi_sink = !force_dvi && intel_hdmi->has_hdmi_sink;
+	pipe_config->has_hdmi_sink = intel_has_hdmi_sink(intel_hdmi,
+							 conn_state);
 
 	if (pipe_config->has_hdmi_sink)
 		pipe_config->has_infoframe = true;
@@ -2448,7 +2451,7 @@ int intel_hdmi_compute_config(struct intel_encoder *encoder,
 				intel_conn_state->force_audio == HDMI_AUDIO_ON;
 	}
 
-	ret = intel_hdmi_compute_clock(encoder, pipe_config, force_dvi);
+	ret = intel_hdmi_compute_clock(encoder, pipe_config);
 	if (ret)
 		return ret;