drm: Make the connector .detect() callback optional

Many drivers (21 to be exact) create connectors that are always
connected (for instance to an LVDS or DSI panel). Instead of forcing
them to implement a dummy .detect() handler, make the callback optional
and consider the connector as always connected in that case.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Jyri Sarha <jsarha@ti.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Vincent Abriou <vincent.abriou@st.com>
Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
[seanpaul fixed small conflict in rcar-du/rcar_du_lvdscon.c]
Signed-off-by: Sean Paul <seanpaul@chromium.org>

27 files changed, 14 insertions, 193 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
index 81cbf0b..1d93e12 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
@@ -429,12 +429,6 @@ dce_virtual_dpms(struct drm_connector *connector, int mode)
 	return 0;
 }
 
-static enum drm_connector_status
-dce_virtual_detect(struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static int
 dce_virtual_set_property(struct drm_connector *connector,
 			 struct drm_property *property,
@@ -463,7 +457,6 @@ static const struct drm_connector_helper_funcs dce_virtual_connector_helper_func
 
 static const struct drm_connector_funcs dce_virtual_connector_funcs = {
 	.dpms = dce_virtual_dpms,
-	.detect = dce_virtual_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = dce_virtual_set_property,
 	.destroy = dce_virtual_destroy,
diff --git a/drivers/gpu/drm/arc/arcpgu_sim.c b/drivers/gpu/drm/arc/arcpgu_sim.c
index 2bf06d7..bca3a67 100644
--- a/drivers/gpu/drm/arc/arcpgu_sim.c
+++ b/drivers/gpu/drm/arc/arcpgu_sim.c
@@ -41,12 +41,6 @@ static int arcpgu_drm_connector_get_modes(struct drm_connector *connector)
 	return count;
 }
 
-static enum drm_connector_status
-arcpgu_drm_connector_detect(struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static void arcpgu_drm_connector_destroy(struct drm_connector *connector)
 {
 	drm_connector_unregister(connector);
@@ -61,7 +55,6 @@ arcpgu_drm_connector_helper_funcs = {
 static const struct drm_connector_funcs arcpgu_drm_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
 	.reset = drm_atomic_helper_connector_reset,
-	.detect = arcpgu_drm_connector_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = arcpgu_drm_connector_destroy,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 5957c3e..e26c98f 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -839,12 +839,6 @@ static void ast_connector_destroy(struct drm_connector *connector)
 	kfree(connector);
 }
 
-static enum drm_connector_status
-ast_connector_detect(struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static const struct drm_connector_helper_funcs ast_connector_helper_funcs = {
 	.mode_valid = ast_mode_valid,
 	.get_modes = ast_get_modes,
@@ -853,7 +847,6 @@ static const struct drm_connector_helper_funcs ast_connector_helper_funcs = {
 
 static const struct drm_connector_funcs ast_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
-	.detect = ast_connector_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = ast_connector_destroy,
 };
diff --git a/drivers/gpu/drm/bochs/bochs_kms.c b/drivers/gpu/drm/bochs/bochs_kms.c
index 0b4e5d1..d5e63ef 100644
--- a/drivers/gpu/drm/bochs/bochs_kms.c
+++ b/drivers/gpu/drm/bochs/bochs_kms.c
@@ -216,12 +216,6 @@ bochs_connector_best_encoder(struct drm_connector *connector)
 	return NULL;
 }
 
-static enum drm_connector_status bochs_connector_detect(struct drm_connector
-							*connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static const struct drm_connector_helper_funcs bochs_connector_connector_helper_funcs = {
 	.get_modes = bochs_connector_get_modes,
 	.mode_valid = bochs_connector_mode_valid,
@@ -230,7 +224,6 @@ static const struct drm_connector_helper_funcs bochs_connector_connector_helper_
 
 static const struct drm_connector_funcs bochs_connector_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
-	.detect = bochs_connector_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = drm_connector_cleanup,
 };
diff --git a/drivers/gpu/drm/bridge/nxp-ptn3460.c b/drivers/gpu/drm/bridge/nxp-ptn3460.c
index f1a9993..27f98c5 100644
--- a/drivers/gpu/drm/bridge/nxp-ptn3460.c
+++ b/drivers/gpu/drm/bridge/nxp-ptn3460.c
@@ -239,16 +239,9 @@ static const struct drm_connector_helper_funcs ptn3460_connector_helper_funcs =
 	.get_modes = ptn3460_get_modes,
 };
 
-static enum drm_connector_status ptn3460_detect(struct drm_connector *connector,
-		bool force)
-{
-	return connector_status_connected;
-}
-
 static const struct drm_connector_funcs ptn3460_connector_funcs = {
 	.dpms = drm_atomic_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
-	.detect = ptn3460_detect,
 	.destroy = drm_connector_cleanup,
 	.reset = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
diff --git a/drivers/gpu/drm/bridge/parade-ps8622.c b/drivers/gpu/drm/bridge/parade-ps8622.c
index 6f7c2f9..ac8cc5b 100644
--- a/drivers/gpu/drm/bridge/parade-ps8622.c
+++ b/drivers/gpu/drm/bridge/parade-ps8622.c
@@ -477,16 +477,9 @@ static const struct drm_connector_helper_funcs ps8622_connector_helper_funcs = {
 	.get_modes = ps8622_get_modes,
 };
 
-static enum drm_connector_status ps8622_detect(struct drm_connector *connector,
-								bool force)
-{
-	return connector_status_connected;
-}
-
 static const struct drm_connector_funcs ps8622_connector_funcs = {
 	.dpms = drm_atomic_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
-	.detect = ps8622_detect,
 	.destroy = drm_connector_cleanup,
 	.reset = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index a787240..de9ffb4 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -1038,12 +1038,6 @@ err:
 	return ret;
 }
 
-static enum drm_connector_status
-tc_connector_detect(struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static void tc_bridge_pre_enable(struct drm_bridge *bridge)
 {
 	struct tc_data *tc = bridge_to_tc(bridge);
@@ -1168,7 +1162,6 @@ static const struct drm_connector_helper_funcs tc_connector_helper_funcs = {
 static const struct drm_connector_funcs tc_connector_funcs = {
 	.dpms = drm_atomic_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
-	.detect = tc_connector_detect,
 	.destroy = drm_connector_cleanup,
 	.reset = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
diff --git a/drivers/gpu/drm/cirrus/cirrus_mode.c b/drivers/gpu/drm/cirrus/cirrus_mode.c
index 17c915d..9a4a27c 100644
--- a/drivers/gpu/drm/cirrus/cirrus_mode.c
+++ b/drivers/gpu/drm/cirrus/cirrus_mode.c
@@ -498,12 +498,6 @@ static struct drm_encoder *cirrus_connector_best_encoder(struct drm_connector
 	return NULL;
 }
 
-static enum drm_connector_status cirrus_vga_detect(struct drm_connector
-						   *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static void cirrus_connector_destroy(struct drm_connector *connector)
 {
 	drm_connector_cleanup(connector);
@@ -517,7 +511,6 @@ static const struct drm_connector_helper_funcs cirrus_vga_connector_helper_funcs
 
 static const struct drm_connector_funcs cirrus_vga_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
-	.detect = cirrus_vga_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = cirrus_connector_destroy,
 };
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index f6b64d7..078d970 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -152,6 +152,14 @@ void drm_kms_helper_poll_enable_locked(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_kms_helper_poll_enable_locked);
 
+static enum drm_connector_status
+drm_connector_detect(struct drm_connector *connector, bool force)
+{
+	return connector->funcs->detect ?
+		connector->funcs->detect(connector, force) :
+		connector_status_connected;
+}
+
 /**
  * drm_helper_probe_single_connector_modes - get complete set of display modes
  * @connector: connector to probe
@@ -239,7 +247,7 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
 		if (connector->funcs->force)
 			connector->funcs->force(connector);
 	} else {
-		connector->status = connector->funcs->detect(connector, true);
+		connector->status = drm_connector_detect(connector, true);
 	}
 
 	/*
@@ -405,7 +413,7 @@ static void output_poll_execute(struct work_struct *work)
 
 		repoll = true;
 
-		connector->status = connector->funcs->detect(connector, false);
+		connector->status = drm_connector_detect(connector, false);
 		if (old_status != connector->status) {
 			const char *old, *new;
 
@@ -565,7 +573,7 @@ bool drm_helper_hpd_irq_event(struct drm_device *dev)
 
 		old_status = connector->status;
 
-		connector->status = connector->funcs->detect(connector, false);
+		connector->status = drm_connector_detect(connector, false);
 		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
 			      connector->base.id,
 			      connector->name,
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
index e1dd75b..05a8ee1 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
@@ -58,17 +58,10 @@ static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
 	drm_connector_cleanup(connector);
 }
 
-static enum drm_connector_status
-fsl_dcu_drm_connector_detect(struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 	.destroy = fsl_dcu_drm_connector_destroy,
-	.detect = fsl_dcu_drm_connector_detect,
 	.dpms = drm_atomic_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.reset = drm_atomic_helper_connector_reset,
diff --git a/drivers/gpu/drm/gma500/cdv_intel_lvds.c b/drivers/gpu/drm/gma500/cdv_intel_lvds.c
index ea733ab..5efdb7f 100644
--- a/drivers/gpu/drm/gma500/cdv_intel_lvds.c
+++ b/drivers/gpu/drm/gma500/cdv_intel_lvds.c
@@ -387,19 +387,6 @@ static void cdv_intel_lvds_mode_set(struct drm_encoder *encoder,
 }
 
 /**
- * Detect the LVDS connection.
- *
- * This always returns CONNECTOR_STATUS_CONNECTED.
- * This connector should only have
- * been set up if the LVDS was actually connected anyway.
- */
-static enum drm_connector_status cdv_intel_lvds_detect(
-				struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
-/**
  * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
  */
 static int cdv_intel_lvds_get_modes(struct drm_connector *connector)
@@ -521,7 +508,6 @@ static const struct drm_connector_helper_funcs
 
 static const struct drm_connector_funcs cdv_intel_lvds_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
-	.detect = cdv_intel_lvds_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = cdv_intel_lvds_set_property,
 	.destroy = cdv_intel_lvds_destroy,
diff --git a/drivers/gpu/drm/gma500/psb_intel_lvds.c b/drivers/gpu/drm/gma500/psb_intel_lvds.c
index fd7c912..483fdce7 100644
--- a/drivers/gpu/drm/gma500/psb_intel_lvds.c
+++ b/drivers/gpu/drm/gma500/psb_intel_lvds.c
@@ -500,19 +500,6 @@ static void psb_intel_lvds_mode_set(struct drm_encoder *encoder,
 }
 
 /*
- * Detect the LVDS connection.
- *
- * This always returns CONNECTOR_STATUS_CONNECTED.
- * This connector should only have
- * been set up if the LVDS was actually connected anyway.
- */
-static enum drm_connector_status psb_intel_lvds_detect(struct drm_connector
-						   *connector, bool force)
-{
-	return connector_status_connected;
-}
-
-/*
  * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
  */
 static int psb_intel_lvds_get_modes(struct drm_connector *connector)
@@ -643,7 +630,6 @@ const struct drm_connector_helper_funcs
 
 const struct drm_connector_funcs psb_intel_lvds_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
-	.detect = psb_intel_lvds_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = psb_intel_lvds_set_property,
 	.destroy = psb_intel_lvds_destroy,
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
index d1f67a9..12a1855 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
@@ -39,12 +39,6 @@ hibmc_connector_best_encoder(struct drm_connector *connector)
 	return drm_encoder_find(connector->dev, connector->encoder_ids[0]);
 }
 
-static enum drm_connector_status hibmc_connector_detect(struct drm_connector
-						 *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static const struct drm_connector_helper_funcs
 	hibmc_connector_helper_funcs = {
 	.get_modes = hibmc_connector_get_modes,
@@ -54,7 +48,6 @@ static const struct drm_connector_helper_funcs
 
 static const struct drm_connector_funcs hibmc_connector_funcs = {
 	.dpms = drm_atomic_helper_connector_dpms,
-	.detect = hibmc_connector_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = drm_connector_cleanup,
 	.reset = drm_atomic_helper_connector_reset,
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index 4e0d025..5b72c50 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -1298,12 +1298,6 @@ static void intel_dsi_prepare(struct intel_encoder *intel_encoder,
 	}
 }
 
-static enum drm_connector_status
-intel_dsi_detect(struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static int intel_dsi_get_modes(struct drm_connector *connector)
 {
 	struct intel_connector *intel_connector = to_intel_connector(connector);
@@ -1407,7 +1401,6 @@ static const struct drm_connector_helper_funcs intel_dsi_connector_helper_funcs
 
 static const struct drm_connector_funcs intel_dsi_connector_funcs = {
 	.dpms = drm_atomic_helper_connector_dpms,
-	.detect = intel_dsi_detect,
 	.late_register = intel_connector_register,
 	.early_unregister = intel_connector_unregister,
 	.destroy = intel_dsi_connector_destroy,
diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index b300998..516d064 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -101,12 +101,6 @@ struct imx_ldb {
 	const struct bus_mux *lvds_mux;
 };
 
-static enum drm_connector_status imx_ldb_connector_detect(
-		struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static void imx_ldb_ch_set_bus_format(struct imx_ldb_channel *imx_ldb_ch,
 				      u32 bus_format)
 {
@@ -397,7 +391,6 @@ static int imx_ldb_encoder_atomic_check(struct drm_encoder *encoder,
 static const struct drm_connector_funcs imx_ldb_connector_funcs = {
 	.dpms = drm_atomic_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
-	.detect = imx_ldb_connector_detect,
 	.destroy = imx_drm_connector_destroy,
 	.reset = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
diff --git a/drivers/gpu/drm/imx/imx-tve.c b/drivers/gpu/drm/imx/imx-tve.c
index 8fc0888..3b602ee 100644
--- a/drivers/gpu/drm/imx/imx-tve.c
+++ b/drivers/gpu/drm/imx/imx-tve.c
@@ -227,12 +227,6 @@ static int tve_setup_vga(struct imx_tve *tve)
 				 TVE_TVDAC_TEST_MODE_MASK, 1);
 }
 
-static enum drm_connector_status imx_tve_connector_detect(
-				struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static int imx_tve_connector_get_modes(struct drm_connector *connector)
 {
 	struct imx_tve *tve = con_to_tve(connector);
@@ -352,7 +346,6 @@ static int imx_tve_atomic_check(struct drm_encoder *encoder,
 static const struct drm_connector_funcs imx_tve_connector_funcs = {
 	.dpms = drm_atomic_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
-	.detect = imx_tve_connector_detect,
 	.destroy = imx_drm_connector_destroy,
 	.reset = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c
index d796ada..8582a83 100644
--- a/drivers/gpu/drm/imx/parallel-display.c
+++ b/drivers/gpu/drm/imx/parallel-display.c
@@ -49,12 +49,6 @@ static inline struct imx_parallel_display *enc_to_imxpd(struct drm_encoder *e)
 	return container_of(e, struct imx_parallel_display, encoder);
 }
 
-static enum drm_connector_status imx_pd_connector_detect(
-		struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static int imx_pd_connector_get_modes(struct drm_connector *connector)
 {
 	struct imx_parallel_display *imxpd = con_to_imxpd(connector);
@@ -143,7 +137,6 @@ static int imx_pd_encoder_atomic_check(struct drm_encoder *encoder,
 static const struct drm_connector_funcs imx_pd_connector_funcs = {
 	.dpms = drm_atomic_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
-	.detect = imx_pd_connector_detect,
 	.destroy = imx_drm_connector_destroy,
 	.reset = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index 28b2044..30027b2 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -562,12 +562,6 @@ static void mtk_dsi_encoder_enable(struct drm_encoder *encoder)
 	mtk_output_dsi_enable(dsi);
 }
 
-static enum drm_connector_status mtk_dsi_connector_detect(
-	struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static int mtk_dsi_connector_get_modes(struct drm_connector *connector)
 {
 	struct mtk_dsi *dsi = connector_to_dsi(connector);
@@ -584,7 +578,6 @@ static const struct drm_encoder_helper_funcs mtk_dsi_encoder_helper_funcs = {
 
 static const struct drm_connector_funcs mtk_dsi_connector_funcs = {
 	.dpms = drm_atomic_helper_connector_dpms,
-	.detect = mtk_dsi_connector_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = drm_connector_cleanup,
 	.reset = drm_atomic_helper_connector_reset,
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 6b21cb2..3a03ac4 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -1658,12 +1658,6 @@ static struct drm_encoder *mga_connector_best_encoder(struct drm_connector
 	return NULL;
 }
 
-static enum drm_connector_status mga_vga_detect(struct drm_connector
-						   *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static void mga_connector_destroy(struct drm_connector *connector)
 {
 	struct mga_connector *mga_connector = to_mga_connector(connector);
@@ -1680,7 +1674,6 @@ static const struct drm_connector_helper_funcs mga_vga_connector_helper_funcs =
 
 static const struct drm_connector_funcs mga_vga_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
-	.detect = mga_vga_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = mga_connector_destroy,
 };
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
index 64e9f0b..3bcfd161 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
@@ -61,16 +61,9 @@ static const struct drm_connector_helper_funcs connector_helper_funcs = {
 	.get_modes = rcar_du_lvds_connector_get_modes,
 };
 
-static enum drm_connector_status
-rcar_du_lvds_connector_detect(struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static const struct drm_connector_funcs connector_funcs = {
 	.dpms = drm_atomic_helper_connector_dpms,
 	.reset = drm_atomic_helper_connector_reset,
-	.detect = rcar_du_lvds_connector_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = drm_connector_cleanup,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index ca22e5e..d9aa382 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -969,12 +969,6 @@ static struct drm_connector_helper_funcs dw_mipi_dsi_connector_helper_funcs = {
 	.mode_valid = dw_mipi_dsi_mode_valid,
 };
 
-static enum drm_connector_status
-dw_mipi_dsi_detect(struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static void dw_mipi_dsi_drm_connector_destroy(struct drm_connector *connector)
 {
 	drm_connector_unregister(connector);
@@ -984,7 +978,6 @@ static void dw_mipi_dsi_drm_connector_destroy(struct drm_connector *connector)
 static struct drm_connector_funcs dw_mipi_dsi_atomic_connector_funcs = {
 	.dpms = drm_atomic_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
-	.detect = dw_mipi_dsi_detect,
 	.destroy = dw_mipi_dsi_drm_connector_destroy,
 	.reset = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
diff --git a/drivers/gpu/drm/shmobile/shmob_drm_crtc.c b/drivers/gpu/drm/shmobile/shmob_drm_crtc.c
index 6547b1d..dddbdd6 100644
--- a/drivers/gpu/drm/shmobile/shmob_drm_crtc.c
+++ b/drivers/gpu/drm/shmobile/shmob_drm_crtc.c
@@ -669,15 +669,8 @@ static void shmob_drm_connector_destroy(struct drm_connector *connector)
 	drm_connector_cleanup(connector);
 }
 
-static enum drm_connector_status
-shmob_drm_connector_detect(struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static const struct drm_connector_funcs connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
-	.detect = shmob_drm_connector_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = shmob_drm_connector_destroy,
 };
diff --git a/drivers/gpu/drm/sti/sti_hda.c b/drivers/gpu/drm/sti/sti_hda.c
index e7c243f..96f336d 100644
--- a/drivers/gpu/drm/sti/sti_hda.c
+++ b/drivers/gpu/drm/sti/sti_hda.c
@@ -642,12 +642,6 @@ struct drm_connector_helper_funcs sti_hda_connector_helper_funcs = {
 	.mode_valid = sti_hda_connector_mode_valid,
 };
 
-static enum drm_connector_status
-sti_hda_connector_detect(struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static int sti_hda_late_register(struct drm_connector *connector)
 {
 	struct sti_hda_connector *hda_connector
@@ -665,7 +659,6 @@ static int sti_hda_late_register(struct drm_connector *connector)
 static const struct drm_connector_funcs sti_hda_connector_funcs = {
 	.dpms = drm_atomic_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
-	.detect = sti_hda_connector_detect,
 	.destroy = drm_connector_cleanup,
 	.reset = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
diff --git a/drivers/gpu/drm/sun4i/sun4i_rgb.c b/drivers/gpu/drm/sun4i/sun4i_rgb.c
index c3ff10f..5380085 100644
--- a/drivers/gpu/drm/sun4i/sun4i_rgb.c
+++ b/drivers/gpu/drm/sun4i/sun4i_rgb.c
@@ -110,12 +110,6 @@ static struct drm_connector_helper_funcs sun4i_rgb_con_helper_funcs = {
 	.mode_valid	= sun4i_rgb_mode_valid,
 };
 
-static enum drm_connector_status
-sun4i_rgb_connector_detect(struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static void
 sun4i_rgb_connector_destroy(struct drm_connector *connector)
 {
@@ -129,7 +123,6 @@ sun4i_rgb_connector_destroy(struct drm_connector *connector)
 
 static struct drm_connector_funcs sun4i_rgb_con_funcs = {
 	.dpms			= drm_atomic_helper_connector_dpms,
-	.detect			= sun4i_rgb_connector_detect,
 	.fill_modes		= drm_helper_probe_single_connector_modes,
 	.destroy		= sun4i_rgb_connector_destroy,
 	.reset			= drm_atomic_helper_connector_reset,
diff --git a/drivers/gpu/drm/sun4i/sun4i_tv.c b/drivers/gpu/drm/sun4i/sun4i_tv.c
index d430b33..c6f4722 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tv.c
@@ -537,12 +537,6 @@ static struct drm_connector_helper_funcs sun4i_tv_comp_connector_helper_funcs =
 	.mode_valid	= sun4i_tv_comp_mode_valid,
 };
 
-static enum drm_connector_status
-sun4i_tv_comp_connector_detect(struct drm_connector *connector, bool force)
-{
-	return connector_status_connected;
-}
-
 static void
 sun4i_tv_comp_connector_destroy(struct drm_connector *connector)
 {
@@ -551,7 +545,6 @@ sun4i_tv_comp_connector_destroy(struct drm_connector *connector)
 
 static struct drm_connector_funcs sun4i_tv_comp_connector_funcs = {
 	.dpms			= drm_atomic_helper_connector_dpms,
-	.detect			= sun4i_tv_comp_connector_detect,
 	.fill_modes		= drm_helper_probe_single_connector_modes,
 	.destroy		= sun4i_tv_comp_connector_destroy,
 	.reset			= drm_atomic_helper_connector_reset,
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_panel.c b/drivers/gpu/drm/tilcdc/tilcdc_panel.c
index 2134bb20..e634201d 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_panel.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_panel.c
@@ -144,13 +144,6 @@ static void panel_connector_destroy(struct drm_connector *connector)
 	drm_connector_cleanup(connector);
 }
 
-static enum drm_connector_status panel_connector_detect(
-		struct drm_connector *connector,
-		bool force)
-{
-	return connector_status_connected;
-}
-
 static int panel_connector_get_modes(struct drm_connector *connector)
 {
 	struct drm_device *dev = connector->dev;
@@ -197,7 +190,6 @@ static struct drm_encoder *panel_connector_best_encoder(
 static const struct drm_connector_funcs panel_connector_funcs = {
 	.destroy            = panel_connector_destroy,
 	.dpms               = drm_atomic_helper_connector_dpms,
-	.detect             = panel_connector_detect,
 	.fill_modes         = drm_helper_probe_single_connector_modes,
 	.reset              = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 34f9741..1218a0c 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -262,6 +262,9 @@ struct drm_connector_funcs {
 	 * connector due to a user request. force can be used by the driver to
 	 * avoid expensive, destructive operations during automated probing.
 	 *
+	 * This callback is optional, if not implemented the connector will be
+	 * considered as always being attached.
+	 *
 	 * FIXME:
 	 *
 	 * Note that this hook is only called by the probe helper. It's not in