[PATCH 02/18] drm/bridge: imx: fix mixed module-builtin object

[Alexander Lobakin <alobakin@pm.me>]

From: Masahiro Yamada <masahiroy@kernel.org>

With CONFIG_DRM_IMX8QM_LDB=m and CONFIG_DRM_IMX8QXP_LDB=y (or vice
versa), imx-ldb-helper.o is linked to a module and also to vmlinux
even though the expected CFLAGS are different between builtins and
modules.

This is the same situation as fixed by commit 637a642f5ca5 ("zstd:
Fixing mixed module-builtin objects").

Turn helpers in imx-ldb-helper.c into inline functions.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-and-tested-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
---
 drivers/gpu/drm/bridge/imx/Makefile         |   4 +-
 drivers/gpu/drm/bridge/imx/imx-ldb-helper.c | 221 --------------------
 drivers/gpu/drm/bridge/imx/imx-ldb-helper.h | 213 +++++++++++++++++--
 3 files changed, 197 insertions(+), 241 deletions(-)
 delete mode 100644 drivers/gpu/drm/bridge/imx/imx-ldb-helper.c

diff --git a/drivers/gpu/drm/bridge/imx/Makefile b/drivers/gpu/drm/bridge/imx/Makefile
index aa90ec8d5433..64b93009376a 100644
--- a/drivers/gpu/drm/bridge/imx/Makefile
+++ b/drivers/gpu/drm/bridge/imx/Makefile
@@ -1,7 +1,7 @@
-imx8qm-ldb-objs := imx-ldb-helper.o imx8qm-ldb-drv.o
+imx8qm-ldb-objs := imx8qm-ldb-drv.o
 obj-$(CONFIG_DRM_IMX8QM_LDB) += imx8qm-ldb.o

-imx8qxp-ldb-objs := imx-ldb-helper.o imx8qxp-ldb-drv.o
+imx8qxp-ldb-objs := imx8qxp-ldb-drv.o
 obj-$(CONFIG_DRM_IMX8QXP_LDB) += imx8qxp-ldb.o

 obj-$(CONFIG_DRM_IMX8QXP_PIXEL_COMBINER) += imx8qxp-pixel-combiner.o
diff --git a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
deleted file mode 100644
index 7338b84bc83d..000000000000
--- a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
+++ /dev/null
@@ -1,221 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (C) 2012 Sascha Hauer, Pengutronix
- * Copyright 2019,2020,2022 NXP
- */
-
-#include <linux/media-bus-format.h>
-#include <linux/mfd/syscon.h>
-#include <linux/of.h>
-#include <linux/regmap.h>
-
-#include <drm/drm_bridge.h>
-#include <drm/drm_of.h>
-#include <drm/drm_print.h>
-
-#include "imx-ldb-helper.h"
-
-bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch)
-{
-	return ldb_ch->link_type == LDB_CH_SINGLE_LINK;
-}
-
-bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch)
-{
-	return ldb_ch->link_type == LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS ||
-	       ldb_ch->link_type == LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS;
-}
-
-int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge,
-				   struct drm_bridge_state *bridge_state,
-				   struct drm_crtc_state *crtc_state,
-				   struct drm_connector_state *conn_state)
-{
-	struct ldb_channel *ldb_ch = bridge->driver_private;
-
-	ldb_ch->in_bus_format = bridge_state->input_bus_cfg.format;
-	ldb_ch->out_bus_format = bridge_state->output_bus_cfg.format;
-
-	return 0;
-}
-
-void ldb_bridge_mode_set_helper(struct drm_bridge *bridge,
-				const struct drm_display_mode *mode,
-				const struct drm_display_mode *adjusted_mode)
-{
-	struct ldb_channel *ldb_ch = bridge->driver_private;
-	struct ldb *ldb = ldb_ch->ldb;
-	bool is_split = ldb_channel_is_split_link(ldb_ch);
-
-	if (is_split)
-		ldb->ldb_ctrl |= LDB_SPLIT_MODE_EN;
-
-	switch (ldb_ch->out_bus_format) {
-	case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
-		break;
-	case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
-		if (ldb_ch->chno == 0 || is_split)
-			ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24;
-		if (ldb_ch->chno == 1 || is_split)
-			ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24;
-		break;
-	case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
-		if (ldb_ch->chno == 0 || is_split)
-			ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24 |
-					 LDB_BIT_MAP_CH0_JEIDA;
-		if (ldb_ch->chno == 1 || is_split)
-			ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24 |
-					 LDB_BIT_MAP_CH1_JEIDA;
-		break;
-	}
-}
-
-void ldb_bridge_enable_helper(struct drm_bridge *bridge)
-{
-	struct ldb_channel *ldb_ch = bridge->driver_private;
-	struct ldb *ldb = ldb_ch->ldb;
-
-	/*
-	 * Platform specific bridge drivers should set ldb_ctrl properly
-	 * for the enablement, so just write the ctrl_reg here.
-	 */
-	regmap_write(ldb->regmap, ldb->ctrl_reg, ldb->ldb_ctrl);
-}
-
-void ldb_bridge_disable_helper(struct drm_bridge *bridge)
-{
-	struct ldb_channel *ldb_ch = bridge->driver_private;
-	struct ldb *ldb = ldb_ch->ldb;
-	bool is_split = ldb_channel_is_split_link(ldb_ch);
-
-	if (ldb_ch->chno == 0 || is_split)
-		ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
-	if (ldb_ch->chno == 1 || is_split)
-		ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
-
-	regmap_write(ldb->regmap, ldb->ctrl_reg, ldb->ldb_ctrl);
-}
-
-int ldb_bridge_attach_helper(struct drm_bridge *bridge,
-			     enum drm_bridge_attach_flags flags)
-{
-	struct ldb_channel *ldb_ch = bridge->driver_private;
-	struct ldb *ldb = ldb_ch->ldb;
-
-	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
-		DRM_DEV_ERROR(ldb->dev,
-			      "do not support creating a drm_connector\n");
-		return -EINVAL;
-	}
-
-	if (!bridge->encoder) {
-		DRM_DEV_ERROR(ldb->dev, "missing encoder\n");
-		return -ENODEV;
-	}
-
-	return drm_bridge_attach(bridge->encoder,
-				ldb_ch->next_bridge, bridge,
-				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
-}
-
-int ldb_init_helper(struct ldb *ldb)
-{
-	struct device *dev = ldb->dev;
-	struct device_node *np = dev->of_node;
-	struct device_node *child;
-	int ret;
-	u32 i;
-
-	ldb->regmap = syscon_node_to_regmap(np->parent);
-	if (IS_ERR(ldb->regmap)) {
-		ret = PTR_ERR(ldb->regmap);
-		if (ret != -EPROBE_DEFER)
-			DRM_DEV_ERROR(dev, "failed to get regmap: %d\n", ret);
-		return ret;
-	}
-
-	for_each_available_child_of_node(np, child) {
-		struct ldb_channel *ldb_ch;
-
-		ret = of_property_read_u32(child, "reg", &i);
-		if (ret || i > MAX_LDB_CHAN_NUM - 1) {
-			ret = -EINVAL;
-			DRM_DEV_ERROR(dev,
-				      "invalid channel node address: %u\n", i);
-			of_node_put(child);
-			return ret;
-		}
-
-		ldb_ch = ldb->channel[i];
-		ldb_ch->ldb = ldb;
-		ldb_ch->chno = i;
-		ldb_ch->is_available = true;
-		ldb_ch->np = child;
-
-		ldb->available_ch_cnt++;
-	}
-
-	return 0;
-}
-
-int ldb_find_next_bridge_helper(struct ldb *ldb)
-{
-	struct device *dev = ldb->dev;
-	struct ldb_channel *ldb_ch;
-	int ret, i;
-
-	for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
-		ldb_ch = ldb->channel[i];
-
-		if (!ldb_ch->is_available)
-			continue;
-
-		ldb_ch->next_bridge = devm_drm_of_get_bridge(dev, ldb_ch->np,
-							     1, 0);
-		if (IS_ERR(ldb_ch->next_bridge)) {
-			ret = PTR_ERR(ldb_ch->next_bridge);
-			if (ret != -EPROBE_DEFER)
-				DRM_DEV_ERROR(dev,
-					      "failed to get next bridge: %d\n",
-					      ret);
-			return ret;
-		}
-	}
-
-	return 0;
-}
-
-void ldb_add_bridge_helper(struct ldb *ldb,
-			   const struct drm_bridge_funcs *bridge_funcs)
-{
-	struct ldb_channel *ldb_ch;
-	int i;
-
-	for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
-		ldb_ch = ldb->channel[i];
-
-		if (!ldb_ch->is_available)
-			continue;
-
-		ldb_ch->bridge.driver_private = ldb_ch;
-		ldb_ch->bridge.funcs = bridge_funcs;
-		ldb_ch->bridge.of_node = ldb_ch->np;
-
-		drm_bridge_add(&ldb_ch->bridge);
-	}
-}
-
-void ldb_remove_bridge_helper(struct ldb *ldb)
-{
-	struct ldb_channel *ldb_ch;
-	int i;
-
-	for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
-		ldb_ch = ldb->channel[i];
-
-		if (!ldb_ch->is_available)
-			continue;
-
-		drm_bridge_remove(&ldb_ch->bridge);
-	}
-}
diff --git a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.h b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.h
index a0a5cde27fbc..42e9b4aa8399 100644
--- a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.h
+++ b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.h
@@ -65,32 +65,209 @@ struct ldb {

 #define bridge_to_ldb_ch(b)	container_of(b, struct ldb_channel, bridge)

-bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch);
-bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch);
+static inline bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch)
+{
+	return ldb_ch->link_type == LDB_CH_SINGLE_LINK;
+}

-int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge,
-				   struct drm_bridge_state *bridge_state,
-				   struct drm_crtc_state *crtc_state,
-				   struct drm_connector_state *conn_state);
+static inline bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch)
+{
+	return ldb_ch->link_type == LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS ||
+	       ldb_ch->link_type == LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS;
+}

-void ldb_bridge_mode_set_helper(struct drm_bridge *bridge,
-				const struct drm_display_mode *mode,
-				const struct drm_display_mode *adjusted_mode);
+static inline int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge,
+						 struct drm_bridge_state *bridge_state,
+						 struct drm_crtc_state *crtc_state,
+						 struct drm_connector_state *conn_state)
+{
+	struct ldb_channel *ldb_ch = bridge->driver_private;

-void ldb_bridge_enable_helper(struct drm_bridge *bridge);
+	ldb_ch->in_bus_format = bridge_state->input_bus_cfg.format;
+	ldb_ch->out_bus_format = bridge_state->output_bus_cfg.format;

-void ldb_bridge_disable_helper(struct drm_bridge *bridge);
+	return 0;
+}

-int ldb_bridge_attach_helper(struct drm_bridge *bridge,
-			     enum drm_bridge_attach_flags flags);
+static inline void ldb_bridge_mode_set_helper(struct drm_bridge *bridge,
+					      const struct drm_display_mode *mode,
+					      const struct drm_display_mode *adjusted_mode)
+{
+	struct ldb_channel *ldb_ch = bridge->driver_private;
+	struct ldb *ldb = ldb_ch->ldb;
+	bool is_split = ldb_channel_is_split_link(ldb_ch);

-int ldb_init_helper(struct ldb *ldb);
+	if (is_split)
+		ldb->ldb_ctrl |= LDB_SPLIT_MODE_EN;

-int ldb_find_next_bridge_helper(struct ldb *ldb);
+	switch (ldb_ch->out_bus_format) {
+	case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+		break;
+	case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+		if (ldb_ch->chno == 0 || is_split)
+			ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24;
+		if (ldb_ch->chno == 1 || is_split)
+			ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24;
+		break;
+	case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+		if (ldb_ch->chno == 0 || is_split)
+			ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24 |
+					 LDB_BIT_MAP_CH0_JEIDA;
+		if (ldb_ch->chno == 1 || is_split)
+			ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24 |
+					 LDB_BIT_MAP_CH1_JEIDA;
+		break;
+	}
+}

-void ldb_add_bridge_helper(struct ldb *ldb,
-			   const struct drm_bridge_funcs *bridge_funcs);
+static inline void ldb_bridge_enable_helper(struct drm_bridge *bridge)
+{
+	struct ldb_channel *ldb_ch = bridge->driver_private;
+	struct ldb *ldb = ldb_ch->ldb;

-void ldb_remove_bridge_helper(struct ldb *ldb);
+	/*
+	 * Platform specific bridge drivers should set ldb_ctrl properly
+	 * for the enablement, so just write the ctrl_reg here.
+	 */
+	regmap_write(ldb->regmap, ldb->ctrl_reg, ldb->ldb_ctrl);
+}
+
+static inline void ldb_bridge_disable_helper(struct drm_bridge *bridge)
+{
+	struct ldb_channel *ldb_ch = bridge->driver_private;
+	struct ldb *ldb = ldb_ch->ldb;
+	bool is_split = ldb_channel_is_split_link(ldb_ch);
+
+	if (ldb_ch->chno == 0 || is_split)
+		ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
+	if (ldb_ch->chno == 1 || is_split)
+		ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
+
+	regmap_write(ldb->regmap, ldb->ctrl_reg, ldb->ldb_ctrl);
+}
+
+static inline int ldb_bridge_attach_helper(struct drm_bridge *bridge,
+					   enum drm_bridge_attach_flags flags)
+{
+	struct ldb_channel *ldb_ch = bridge->driver_private;
+	struct ldb *ldb = ldb_ch->ldb;
+
+	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+		DRM_DEV_ERROR(ldb->dev,
+			      "do not support creating a drm_connector\n");
+		return -EINVAL;
+	}
+
+	if (!bridge->encoder) {
+		DRM_DEV_ERROR(ldb->dev, "missing encoder\n");
+		return -ENODEV;
+	}
+
+	return drm_bridge_attach(bridge->encoder,
+				ldb_ch->next_bridge, bridge,
+				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+}
+
+static inline int ldb_init_helper(struct ldb *ldb)
+{
+	struct device *dev = ldb->dev;
+	struct device_node *np = dev->of_node;
+	struct device_node *child;
+	int ret;
+	u32 i;
+
+	ldb->regmap = syscon_node_to_regmap(np->parent);
+	if (IS_ERR(ldb->regmap)) {
+		ret = PTR_ERR(ldb->regmap);
+		if (ret != -EPROBE_DEFER)
+			DRM_DEV_ERROR(dev, "failed to get regmap: %d\n", ret);
+		return ret;
+	}
+
+	for_each_available_child_of_node(np, child) {
+		struct ldb_channel *ldb_ch;
+
+		ret = of_property_read_u32(child, "reg", &i);
+		if (ret || i > MAX_LDB_CHAN_NUM - 1) {
+			ret = -EINVAL;
+			DRM_DEV_ERROR(dev,
+				      "invalid channel node address: %u\n", i);
+			of_node_put(child);
+			return ret;
+		}
+
+		ldb_ch = ldb->channel[i];
+		ldb_ch->ldb = ldb;
+		ldb_ch->chno = i;
+		ldb_ch->is_available = true;
+		ldb_ch->np = child;
+
+		ldb->available_ch_cnt++;
+	}
+
+	return 0;
+}
+
+static inline int ldb_find_next_bridge_helper(struct ldb *ldb)
+{
+	struct device *dev = ldb->dev;
+	struct ldb_channel *ldb_ch;
+	int ret, i;
+
+	for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
+		ldb_ch = ldb->channel[i];
+
+		if (!ldb_ch->is_available)
+			continue;
+
+		ldb_ch->next_bridge = devm_drm_of_get_bridge(dev, ldb_ch->np,
+							     1, 0);
+		if (IS_ERR(ldb_ch->next_bridge)) {
+			ret = PTR_ERR(ldb_ch->next_bridge);
+			if (ret != -EPROBE_DEFER)
+				DRM_DEV_ERROR(dev,
+					      "failed to get next bridge: %d\n",
+					      ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static inline void ldb_add_bridge_helper(struct ldb *ldb,
+					 const struct drm_bridge_funcs *bridge_funcs)
+{
+	struct ldb_channel *ldb_ch;
+	int i;
+
+	for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
+		ldb_ch = ldb->channel[i];
+
+		if (!ldb_ch->is_available)
+			continue;
+
+		ldb_ch->bridge.driver_private = ldb_ch;
+		ldb_ch->bridge.funcs = bridge_funcs;
+		ldb_ch->bridge.of_node = ldb_ch->np;
+
+		drm_bridge_add(&ldb_ch->bridge);
+	}
+}
+
+static inline void ldb_remove_bridge_helper(struct ldb *ldb)
+{
+	struct ldb_channel *ldb_ch;
+	int i;
+
+	for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
+		ldb_ch = ldb->channel[i];
+
+		if (!ldb_ch->is_available)
+			continue;
+
+		drm_bridge_remove(&ldb_ch->bridge);
+	}
+}

 #endif /* __IMX_LDB_HELPER__ */
--
2.38.1