[PATCH RFC v2 03/19] drm/panel: move to a new module

[Luca Ceresoli <luca.ceresoli@bootlin.com>]

Work is in progress for every drm_panel to embed a drm_bridge, which will
make the drm_panel code (currently in the drm module) depend on the
drm_kms_helper module.

To avoid the main drm module to depend on other drm modules and create a
depepdency loop, move drm_panel.o to a new drm_panel module, so the module
dependency will be drm_panel -> drm_kms_helper instead.

Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
---
 drivers/gpu/drm/Makefile      | 2 +-
 drivers/gpu/drm/panel/Kconfig | 2 +-
 include/drm/drm_panel.h       | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index c4509e7fd248..9a8df14ef628 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -79,7 +79,6 @@ drm-$(CONFIG_DRM_CLIENT) += \
 	drm_client_modeset.o \
 	drm_client_sysrq.o
 drm-$(CONFIG_COMPAT) += drm_ioc32.o
-drm-$(CONFIG_DRM_PANEL) += drm_panel.o
 drm-$(CONFIG_OF) += drm_of.o
 drm-$(CONFIG_PCI) += drm_pci.o
 drm-$(CONFIG_DEBUG_FS) += \
@@ -96,6 +95,7 @@ drm-$(CONFIG_DRM_PANIC_SCREEN_QR_CODE) += drm_panic_qr.o
 drm-$(CONFIG_DRM_RAS) += drm_ras.o drm_ras_nl.o drm_ras_genl_family.o
 obj-$(CONFIG_DRM)	+= drm.o
 
+obj-$(CONFIG_DRM_PANEL) += drm_panel.o
 obj-$(CONFIG_DRM_PANEL_ORIENTATION_QUIRKS) += drm_panel_orientation_quirks.o
 obj-$(CONFIG_DRM_PANEL_BACKLIGHT_QUIRKS) += drm_panel_backlight_quirks.o
 
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 747f47347521..0a79a0558101 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config DRM_PANEL
-	bool
+	tristate
 	depends on DRM
 	help
 	  Panel registration and lookup framework.
diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h
index b87323443f49..08949d41d743 100644
--- a/include/drm/drm_panel.h
+++ b/include/drm/drm_panel.h
@@ -335,7 +335,7 @@ void drm_panel_disable(struct drm_panel *panel);
 
 int drm_panel_get_modes(struct drm_panel *panel, struct drm_connector *connector);
 
-#if defined(CONFIG_OF) && defined(CONFIG_DRM_PANEL)
+#if defined(CONFIG_OF) && IS_ENABLED(CONFIG_DRM_PANEL)
 struct drm_panel *of_drm_find_panel(const struct device_node *np);
 #else
 static inline struct drm_panel *of_drm_find_panel(const struct device_node *np)
@@ -344,7 +344,7 @@ static inline struct drm_panel *of_drm_find_panel(const struct device_node *np)
 }
 #endif
 
-#if defined(CONFIG_DRM_PANEL)
+#if IS_ENABLED(CONFIG_DRM_PANEL)
 bool drm_is_panel_follower(struct device *dev);
 int drm_panel_add_follower(struct device *follower_dev,
 			   struct drm_panel_follower *follower);

-- 
2.55.0