drm/i915: Remove intel_panel_detect()

With neither LVDS or eDP no longer using intel_panel_detect() we can
kill it, and the accompanying modparam.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180717174216.22252-3-ville.syrjala@linux.intel.com
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/i915/i915_params.c

@@ -44,10 +44,6 @@ i915_param_named(modeset, int, 0400,
 	"Use kernel modesetting [KMS] (0=disable, "
 	"1=on, -1=force vga console preference [default])");
 
-i915_param_named_unsafe(panel_ignore_lid, int, 0600,
-	"Override lid status (0=autodetect, 1=autodetect disabled [default], "
-	"-1=force lid closed, -2=force lid open)");
-
 i915_param_named_unsafe(enable_dc, int, 0400,
 	"Enable power-saving display C-states. "
 	"(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");

drivers/gpu/drm/i915/i915_params.h

@@ -36,7 +36,6 @@ struct drm_printer;
 #define I915_PARAMS_FOR_EACH(param) \
 	param(char *, vbt_firmware, NULL) \
 	param(int, modeset, -1) \
-	param(int, panel_ignore_lid, 1) \
 	param(int, lvds_channel_mode, 0) \
 	param(int, panel_use_ssc, -1) \
 	param(int, vbt_sdvo_panel_type, -1) \

drivers/gpu/drm/i915/intel_drv.h

@@ -1889,7 +1889,6 @@ void intel_panel_enable_backlight(const struct intel_crtc_state *crtc_state,
 				  const struct drm_connector_state *conn_state);
 void intel_panel_disable_backlight(const struct drm_connector_state *old_conn_state);
 void intel_panel_destroy_backlight(struct drm_connector *connector);
-enum drm_connector_status intel_panel_detect(struct drm_i915_private *dev_priv);
 extern struct drm_display_mode *intel_find_panel_downclock(
 				struct drm_i915_private *dev_priv,
 				struct drm_display_mode *fixed_mode,

drivers/gpu/drm/i915/intel_panel.c

@@ -375,26 +375,6 @@ out:
 	pipe_config->gmch_pfit.lvds_border_bits = border;
 }
 
-enum drm_connector_status
-intel_panel_detect(struct drm_i915_private *dev_priv)
-{
-	/* Assume that the BIOS does not lie through the OpRegion... */
-	if (!i915_modparams.panel_ignore_lid && dev_priv->opregion.lid_state) {
-		return *dev_priv->opregion.lid_state & 0x1 ?
-			connector_status_connected :
-			connector_status_disconnected;
-	}
-
-	switch (i915_modparams.panel_ignore_lid) {
-	case -2:
-		return connector_status_connected;
-	case -1:
-		return connector_status_disconnected;
-	default:
-		return connector_status_unknown;
-	}
-}
-
 /**
  * scale - scale values from one range to another
  * @source_val: value in range [@source_min..@source_max]