drm/i915/bios: start using the intel_bios_encoder_data directly

Start using struct intel_bios_encoder_data directly. We'll start
sanitizing the child device data directly as well, instead of the cached
data in ddi_port_info[]. The one downside here is having to store a
non-const pointer back to intel_bios_encoder_data.

Eventually we'll be able to have a direct pointer from encoder to
intel_bios_encoder_data, removing the need to go through the
ddi_port_info[] array altogether. And we'll be able to remove all the
cached data in ddi_port_info[].

v2:
- Remove supports_dp and supports_edp from ddi_port_info too
- Add devdata != NULL check in intel_bios_is_port_edp()

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com> # v1
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/061df32a012ff640060920fcd730fb23f8717ee8.1615998927.git.jani.nikula@intel.com

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

@@ -1524,6 +1524,7 @@ static void sanitize_ddc_pin(struct drm_i915_private *i915,
 			     enum port port)
 {
 	struct ddi_vbt_port_info *info = &i915->vbt.ddi_port_info[port];
+	struct child_device_config *child;
 	enum port p;
 
 	p = get_port_by_ddc_pin(i915, info->alternate_ddc_pin);
@@ -1546,9 +1547,11 @@ static void sanitize_ddc_pin(struct drm_i915_private *i915,
 	 * port A and port E with the same AUX ch and we must pick port E :(
 	 */
 	info = &i915->vbt.ddi_port_info[p];
+	child = &info->devdata->child;
+
+	child->device_type &= ~DEVICE_TYPE_TMDS_DVI_SIGNALING;
+	child->device_type |= DEVICE_TYPE_NOT_HDMI_OUTPUT;
 
-	info->supports_dvi = false;
-	info->supports_hdmi = false;
 	info->alternate_ddc_pin = 0;
 }
 
@@ -1574,6 +1577,7 @@ static void sanitize_aux_ch(struct drm_i915_private *i915,
 			    enum port port)
 {
 	struct ddi_vbt_port_info *info = &i915->vbt.ddi_port_info[port];
+	struct child_device_config *child;
 	enum port p;
 
 	p = get_port_by_aux_ch(i915, info->alternate_aux_channel);
@@ -1596,8 +1600,9 @@ static void sanitize_aux_ch(struct drm_i915_private *i915,
 	 * port A and port E with the same AUX ch and we must pick port E :(
 	 */
 	info = &i915->vbt.ddi_port_info[p];
+	child = &info->devdata->child;
 
-	info->supports_dp = false;
+	child->device_type &= ~DEVICE_TYPE_DISPLAYPORT_OUTPUT;
 	info->alternate_aux_channel = 0;
 }
 
@@ -1822,20 +1827,20 @@ intel_bios_encoder_supports_crt(const struct intel_bios_encoder_data *devdata)
 	return devdata->child.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
 }
 
-static bool
+bool
 intel_bios_encoder_supports_dvi(const struct intel_bios_encoder_data *devdata)
 {
 	return devdata->child.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
 }
 
-static bool
+bool
 intel_bios_encoder_supports_hdmi(const struct intel_bios_encoder_data *devdata)
 {
 	return intel_bios_encoder_supports_dvi(devdata) &&
 		(devdata->child.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
 }
 
-static bool
+bool
 intel_bios_encoder_supports_dp(const struct intel_bios_encoder_data *devdata)
 {
 	return devdata->child.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
@@ -1877,11 +1882,6 @@ static void parse_ddi_port(struct drm_i915_private *i915,
 	is_hdmi = intel_bios_encoder_supports_hdmi(devdata);
 	is_edp = intel_bios_encoder_supports_edp(devdata);
 
-	info->supports_dvi = is_dvi;
-	info->supports_hdmi = is_hdmi;
-	info->supports_dp = is_dp;
-	info->supports_edp = is_edp;
-
 	if (i915->vbt.version >= 195)
 		info->supports_typec_usb = child->dp_usb_type_c;
 
@@ -2557,8 +2557,13 @@ bool intel_bios_is_port_edp(struct drm_i915_private *i915, enum port port)
 		[PORT_F] = DVO_PORT_DPF,
 	};
 
-	if (HAS_DDI(i915))
+	if (HAS_DDI(i915)) {
-		return i915->vbt.ddi_port_info[port].supports_edp;
+		const struct intel_bios_encoder_data *devdata;
+
+		devdata = intel_bios_encoder_data_lookup(i915, port);
+
+		return devdata && intel_bios_encoder_supports_edp(devdata);
+	}
 
 	list_for_each_entry(devdata, &i915->vbt.display_devices, node) {
 		child = &devdata->child;
@@ -2930,21 +2935,6 @@ int intel_bios_alternate_ddc_pin(struct intel_encoder *encoder)
 	return i915->vbt.ddi_port_info[encoder->port].alternate_ddc_pin;
 }
 
-bool intel_bios_port_supports_dvi(struct drm_i915_private *i915, enum port port)
-{
-	return i915->vbt.ddi_port_info[port].supports_dvi;
-}
-
-bool intel_bios_port_supports_hdmi(struct drm_i915_private *i915, enum port port)
-{
-	return i915->vbt.ddi_port_info[port].supports_hdmi;
-}
-
-bool intel_bios_port_supports_dp(struct drm_i915_private *i915, enum port port)
-{
-	return i915->vbt.ddi_port_info[port].supports_dp;
-}
-
 bool intel_bios_port_supports_typec_usb(struct drm_i915_private *i915,
 					enum port port)
 {
@@ -2955,3 +2945,9 @@ bool intel_bios_port_supports_tbt(struct drm_i915_private *i915, enum port port)
 {
 	return i915->vbt.ddi_port_info[port].supports_tbt;
 }
+
+const struct intel_bios_encoder_data *
+intel_bios_encoder_data_lookup(struct drm_i915_private *i915, enum port port)
+{
+	return i915->vbt.ddi_port_info[port].devdata;
+}

drivers/gpu/drm/i915/display/intel_bios.h

@@ -254,10 +254,14 @@ int intel_bios_dp_boost_level(struct intel_encoder *encoder);
 int intel_bios_hdmi_boost_level(struct intel_encoder *encoder);
 int intel_bios_dp_max_link_rate(struct intel_encoder *encoder);
 int intel_bios_alternate_ddc_pin(struct intel_encoder *encoder);
-bool intel_bios_port_supports_dvi(struct drm_i915_private *i915, enum port port);
-bool intel_bios_port_supports_hdmi(struct drm_i915_private *i915, enum port port);
-bool intel_bios_port_supports_dp(struct drm_i915_private *i915, enum port port);
 bool intel_bios_port_supports_typec_usb(struct drm_i915_private *i915, enum port port);
 bool intel_bios_port_supports_tbt(struct drm_i915_private *i915, enum port port);
 
+const struct intel_bios_encoder_data *
+intel_bios_encoder_data_lookup(struct drm_i915_private *i915, enum port port);
+
+bool intel_bios_encoder_supports_dvi(const struct intel_bios_encoder_data *devdata);
+bool intel_bios_encoder_supports_hdmi(const struct intel_bios_encoder_data *devdata);
+bool intel_bios_encoder_supports_dp(const struct intel_bios_encoder_data *devdata);
+
 #endif /* _INTEL_BIOS_H_ */

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

@@ -4426,6 +4426,7 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
 {
 	struct intel_digital_port *dig_port;
 	struct intel_encoder *encoder;
+	const struct intel_bios_encoder_data *devdata;
 	bool init_hdmi, init_dp;
 	enum phy phy = intel_port_to_phy(dev_priv, port);
 
@@ -4441,9 +4442,17 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
 		return;
 	}
 
-	init_hdmi = intel_bios_port_supports_dvi(dev_priv, port) ||
+	devdata = intel_bios_encoder_data_lookup(dev_priv, port);
-		intel_bios_port_supports_hdmi(dev_priv, port);
+	if (!devdata) {
-	init_dp = intel_bios_port_supports_dp(dev_priv, port);
+		drm_dbg_kms(&dev_priv->drm,
+			    "VBT says port %c is not present\n",
+			    port_name(port));
+		return;
+	}
+
+	init_hdmi = intel_bios_encoder_supports_dvi(devdata) ||
+		intel_bios_encoder_supports_hdmi(devdata);
+	init_dp = intel_bios_encoder_supports_dp(devdata);
 
 	if (intel_bios_is_lspcon_present(dev_priv, port)) {
 		/*

drivers/gpu/drm/i915/i915_drv.h

@@ -582,7 +582,7 @@ i915_fence_timeout(const struct drm_i915_private *i915)
 
 struct ddi_vbt_port_info {
 	/* Non-NULL if port present. */
-	const struct intel_bios_encoder_data *devdata;
+	struct intel_bios_encoder_data *devdata;
 
 	int max_tmds_clock;
 
@@ -590,10 +590,6 @@ struct ddi_vbt_port_info {
 	u8 hdmi_level_shift;
 	u8 hdmi_level_shift_set:1;
 
-	u8 supports_dvi:1;
-	u8 supports_hdmi:1;
-	u8 supports_dp:1;
-	u8 supports_edp:1;
 	u8 supports_typec_usb:1;
 	u8 supports_tbt:1;