[RFC 3/6] drm/i915: Remove local fbdev emulation Kconfig option

[Archit Taneja <architt@codeaurora.org>]

DRM_I915_FBDEV config is currently used to enable/disable fbdev emulation for
the i915 kms driver.

Replace this with the top level DRM_FBDEV_EMULATION config option. Using this
config lets us also prevent wrapping around drm_fb_helper_* calls with #ifdefs
in certain places.

The #ifdef in drm_i915_private struct adding/removing members intel_fbdev and
fbdev_suspend_work has been removed. This helps us use stub drm helper functions
at not much cost.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/i915/Kconfig         | 15 ---------------
 drivers/gpu/drm/i915/Makefile        |  4 ++--
 drivers/gpu/drm/i915/i915_debugfs.c  |  2 +-
 drivers/gpu/drm/i915/i915_drv.h      |  2 --
 drivers/gpu/drm/i915/intel_display.c | 10 ++++------
 drivers/gpu/drm/i915/intel_dp_mst.c  | 14 ++++++++------
 drivers/gpu/drm/i915/intel_drv.h     |  3 +--
 drivers/gpu/drm/i915/intel_fbdev.c   |  7 -------
 8 files changed, 16 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index 74acca9..bd9ccfc 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -45,21 +45,6 @@ config DRM_I915_KMS
 
 	  If in doubt, say "Y".
 
-config DRM_I915_FBDEV
-	bool "Enable legacy fbdev support for the modesetting intel driver"
-	depends on DRM_I915
-	select DRM_KMS_FB_HELPER
-	select FB_CFB_FILLRECT
-	select FB_CFB_COPYAREA
-	select FB_CFB_IMAGEBLIT
-	default y
-	help
-	  Choose this option if you have a need for the legacy fbdev
-	  support. Note that this support also provide the linux console
-	  support on top of the intel modesetting driver.
-
-	  If in doubt, say "Y".
-
 config DRM_I915_PRELIMINARY_HW_SUPPORT
 	bool "Enable preliminary support for prerelease Intel hardware by default"
 	depends on DRM_I915
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index f019225..3b3325d 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -56,8 +56,8 @@ i915-y += intel_audio.o \
 	  intel_psr.o \
 	  intel_sideband.o \
 	  intel_sprite.o
-i915-$(CONFIG_ACPI)		+= intel_acpi.o intel_opregion.o
-i915-$(CONFIG_DRM_I915_FBDEV)	+= intel_fbdev.o
+i915-$(CONFIG_ACPI)			+= intel_acpi.o intel_opregion.o
+i915-$(CONFIG_DRM_FBDEV_EMULATION)	+= intel_fbdev.o
 
 # modesetting output/encoder code
 i915-y += dvo_ch7017.o \
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index e8b18e5..0c8bcd7 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1772,7 +1772,7 @@ static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
 	struct intel_fbdev *ifbdev = NULL;
 	struct intel_framebuffer *fb;
 
-#ifdef CONFIG_DRM_I915_FBDEV
+#ifdef CONFIG_DRM_FBDEV_EMULATION
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
 	ifbdev = dev_priv->fbdev;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 8727086..e511fa4 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1819,11 +1819,9 @@ struct drm_i915_private {
 
 	struct drm_i915_gem_object *vlv_pctx;
 
-#ifdef CONFIG_DRM_I915_FBDEV
 	/* list of fbdev register on this device */
 	struct intel_fbdev *fbdev;
 	struct work_struct fbdev_suspend_work;
-#endif
 
 	struct drm_property *broadcast_rgb_property;
 	struct drm_property *force_audio_property;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e730789..9cf13e6 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8562,7 +8562,6 @@ static struct drm_framebuffer *
 mode_fits_in_fbdev(struct drm_device *dev,
 		   struct drm_display_mode *mode)
 {
-#ifdef CONFIG_DRM_I915_FBDEV
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_i915_gem_object *obj;
 	struct drm_framebuffer *fb;
@@ -8585,9 +8584,6 @@ mode_fits_in_fbdev(struct drm_device *dev,
 		return NULL;
 
 	return fb;
-#else
-	return NULL;
-#endif
 }
 
 bool intel_get_load_detect_pipe(struct drm_connector *connector,
@@ -12807,11 +12803,13 @@ intel_user_framebuffer_create(struct drm_device *dev,
 	return intel_framebuffer_create(dev, mode_cmd, obj);
 }
 
-#ifndef CONFIG_DRM_I915_FBDEV
 static inline void intel_fbdev_output_poll_changed(struct drm_device *dev)
 {
+	struct drm_i915_private *dev_priv = dev->dev_private;
+
+	if (dev_priv->fbdev)
+		drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 }
-#endif
 
 static const struct drm_mode_config_funcs intel_mode_funcs = {
 	.fb_create = intel_user_framebuffer_create,
diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index 9f67a37..fe69df0 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -376,18 +376,20 @@ static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
 
 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
 {
-#ifdef CONFIG_DRM_I915_FBDEV
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
-	drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base);
-#endif
+
+	if (dev_priv->fbdev)
+		drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
+			&connector->base);
 }
 
 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
 {
-#ifdef CONFIG_DRM_I915_FBDEV
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
-	drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base);
-#endif
+
+	if (dev_priv->fbdev)
+		drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
+			&connector->base);
 }
 
 static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *pathprop)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index eef79cc..6920da2 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1062,12 +1062,11 @@ void intel_dvo_init(struct drm_device *dev);
 
 
 /* legacy fbdev emulation in intel_fbdev.c */
-#ifdef CONFIG_DRM_I915_FBDEV
+#ifdef CONFIG_DRM_FBDEV_EMULATION
 extern int intel_fbdev_init(struct drm_device *dev);
 extern void intel_fbdev_initial_config(void *data, async_cookie_t cookie);
 extern void intel_fbdev_fini(struct drm_device *dev);
 extern void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous);
-extern void intel_fbdev_output_poll_changed(struct drm_device *dev);
 extern void intel_fbdev_restore_mode(struct drm_device *dev);
 #else
 static inline int intel_fbdev_init(struct drm_device *dev)
diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
index 3001a867..656ec1c 100644
--- a/drivers/gpu/drm/i915/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -762,13 +762,6 @@ void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous
 	console_unlock();
 }
 
-void intel_fbdev_output_poll_changed(struct drm_device *dev)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	if (dev_priv->fbdev)
-		drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
-}
-
 void intel_fbdev_restore_mode(struct drm_device *dev)
 {
 	int ret;
-- 
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