drm/i915/bios: calculate panel type as per child device index in VBT

Each LFP may have different panel type which is stored in LFP data
data block. Based on the child device index respective panel-type/
panel-type2 field will be used.

v1: Initial rfc verion.
v2: Based on review comments from Jani,
- Used panel-type instead addition panel-index variable.
- DEVICE_HANDLE_* name changed and placed before DEVICE_TYPE_*
macro.
v3:
- passing intel_bios_encoder_data as argument of
intel_bios_init_panel(). Passing NULL to indicate encoder is not
initialized yet for dsi as current focus is to enable dual EDP. [Jani]
v4:
- encoder->devdata used which is initialized before from vbt
structure. [Jani]

Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220620065138.5126-1-animesh.manna@intel.com

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

@@ -2049,7 +2049,7 @@ void icl_dsi_init(struct drm_i915_private *dev_priv)
 	/* attach connector to encoder */
 	intel_connector_attach_encoder(intel_connector, encoder);
 
-	intel_bios_init_panel(dev_priv, &intel_connector->panel, NULL);
+	intel_bios_init_panel(dev_priv, &intel_connector->panel, NULL, NULL);
 
 	mutex_lock(&dev->mode_config.mutex);
 	intel_panel_add_vbt_lfp_fixed_mode(intel_connector);

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

@@ -603,12 +603,14 @@ get_lfp_data_tail(const struct bdb_lvds_lfp_data *data,
 }
 
 static int opregion_get_panel_type(struct drm_i915_private *i915,
+				   const struct intel_bios_encoder_data *devdata,
 				   const struct edid *edid)
 {
 	return intel_opregion_get_panel_type(i915);
 }
 
 static int vbt_get_panel_type(struct drm_i915_private *i915,
+			      const struct intel_bios_encoder_data *devdata,
 			      const struct edid *edid)
 {
 	const struct bdb_lvds_options *lvds_options;
@@ -624,10 +626,16 @@ static int vbt_get_panel_type(struct drm_i915_private *i915,
 		return -1;
 	}
 
+	if (devdata && devdata->child.handle == DEVICE_HANDLE_LFP2)
+		return lvds_options->panel_type2;
+
+	drm_WARN_ON(&i915->drm, devdata && devdata->child.handle != DEVICE_HANDLE_LFP1);
+
 	return lvds_options->panel_type;
 }
 
 static int pnpid_get_panel_type(struct drm_i915_private *i915,
+				const struct intel_bios_encoder_data *devdata,
 				const struct edid *edid)
 {
 	const struct bdb_lvds_lfp_data *data;
@@ -674,6 +682,7 @@ static int pnpid_get_panel_type(struct drm_i915_private *i915,
 }
 
 static int fallback_get_panel_type(struct drm_i915_private *i915,
+				   const struct intel_bios_encoder_data *devdata,
 				   const struct edid *edid)
 {
 	return 0;
@@ -687,11 +696,13 @@ enum panel_type {
 };
 
 static int get_panel_type(struct drm_i915_private *i915,
+			  const struct intel_bios_encoder_data *devdata,
 			  const struct edid *edid)
 {
 	struct {
 		const char *name;
 		int (*get_panel_type)(struct drm_i915_private *i915,
+				      const struct intel_bios_encoder_data *devdata,
 				      const struct edid *edid);
 		int panel_type;
 	} panel_types[] = {
@@ -715,7 +726,7 @@ static int get_panel_type(struct drm_i915_private *i915,
 	int i;
 
 	for (i = 0; i < ARRAY_SIZE(panel_types); i++) {
-		panel_types[i].panel_type = panel_types[i].get_panel_type(i915, edid);
+		panel_types[i].panel_type = panel_types[i].get_panel_type(i915, devdata, edid);
 
 		drm_WARN_ON(&i915->drm, panel_types[i].panel_type > 0xf &&
 			    panel_types[i].panel_type != 0xff);
@@ -3126,11 +3137,12 @@ out:
 
 void intel_bios_init_panel(struct drm_i915_private *i915,
 			   struct intel_panel *panel,
+			   const struct intel_bios_encoder_data *devdata,
 			   const struct edid *edid)
 {
 	init_vbt_panel_defaults(panel);
 
-	panel->vbt.panel_type = get_panel_type(i915, edid);
+	panel->vbt.panel_type = get_panel_type(i915, devdata, edid);
 
 	parse_panel_options(i915, panel);
 	parse_generic_dtd(i915, panel);

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

@@ -234,6 +234,7 @@ struct mipi_pps_data {
 void intel_bios_init(struct drm_i915_private *dev_priv);
 void intel_bios_init_panel(struct drm_i915_private *dev_priv,
 			   struct intel_panel *panel,
+			   const struct intel_bios_encoder_data *devdata,
 			   const struct edid *edid);
 void intel_bios_fini_panel(struct intel_panel *panel);
 void intel_bios_driver_remove(struct drm_i915_private *dev_priv);

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

@@ -5193,6 +5193,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 	struct drm_device *dev = &dev_priv->drm;
 	struct drm_connector *connector = &intel_connector->base;
 	struct drm_display_mode *fixed_mode;
+	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
 	bool has_dpcd;
 	enum pipe pipe = INVALID_PIPE;
 	struct edid *edid;
@@ -5250,7 +5251,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 	intel_connector->edid = edid;
 
 	intel_bios_init_panel(dev_priv, &intel_connector->panel,
-			      IS_ERR(edid) ? NULL : edid);
+			      encoder->devdata, IS_ERR(edid) ? NULL : edid);
 
 	intel_panel_add_edid_fixed_modes(intel_connector,
 					 intel_connector->panel.vbt.drrs_type != DRRS_TYPE_NONE,

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

@@ -967,7 +967,7 @@ void intel_lvds_init(struct drm_i915_private *dev_priv)
 	}
 	intel_connector->edid = edid;
 
-	intel_bios_init_panel(dev_priv, &intel_connector->panel,
+	intel_bios_init_panel(dev_priv, &intel_connector->panel, NULL,
 			      IS_ERR(edid) ? NULL : edid);
 
 	/* Try EDID first */

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

@@ -2900,7 +2900,7 @@ intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo, int device)
 	if (!intel_sdvo_create_enhance_property(intel_sdvo, intel_sdvo_connector))
 		goto err;
 
-	intel_bios_init_panel(i915, &intel_connector->panel, NULL);
+	intel_bios_init_panel(i915, &intel_connector->panel, NULL, NULL);
 
 	/*
 	 * Fetch modes from VBT. For SDVO prefer the VBT mode since some

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

@@ -182,6 +182,10 @@ struct bdb_general_features {
 #define GPIO_PIN_ADD_DDC	0x04 /* "ADDCARD DDC GPIO pins" */
 #define GPIO_PIN_ADD_DDC_I2C	0x06 /* "ADDCARD DDC/I2C GPIO pins" */
 
+/* Device handle */
+#define DEVICE_HANDLE_LFP1	0x0008
+#define DEVICE_HANDLE_LFP2	0x0080
+
 /* Pre 915 */
 #define DEVICE_TYPE_NONE	0x00
 #define DEVICE_TYPE_CRT		0x01

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

@@ -1926,7 +1926,7 @@ void vlv_dsi_init(struct drm_i915_private *dev_priv)
 
 	intel_dsi->panel_power_off_time = ktime_get_boottime();
 
-	intel_bios_init_panel(dev_priv, &intel_connector->panel, NULL);
+	intel_bios_init_panel(dev_priv, &intel_connector->panel, NULL, NULL);
 
 	if (intel_connector->panel.vbt.dsi.config->dual_link)
 		intel_dsi->ports = BIT(PORT_A) | BIT(PORT_C);