Message-Id: <20240814-google-vkms-managed-v1-3-7ab8b8921103@bootlin.com>
Date: Wed, 14 Aug 2024 12:06:36 +0200
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>, 
 Melissa Wen <melissa.srw@...il.com>, 
 Maíra Canal <mairacanal@...eup.net>, 
 Haneen Mohammed <hamohammed.sa@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>
Cc: dri-devel@...ts.freedesktop.org, arthurgrillo@...eup.net, 
 linux-kernel@...r.kernel.org, jeremie.dautheribes@...tlin.com, 
 miquel.raynal@...tlin.com, thomas.petazzoni@...tlin.com, 
 seanpaul@...gle.com, nicolejadeyee@...gle.com, 
 Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH RFC 3/4] drm/vkms: Switch to managed for crtc

The current VKMS driver uses non-managed function to create crtcs. It
is not an issue yet, but in order to support multiple devices easly,
convert this code to use drm and device managed helpers.

Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
 drivers/gpu/drm/vkms/vkms_composer.c  |  10 +--
 drivers/gpu/drm/vkms/vkms_composer.h  |   2 +-
 drivers/gpu/drm/vkms/vkms_crtc.c      |  75 ++++++++++++-------
 drivers/gpu/drm/vkms/vkms_crtc.h      |  19 +++--
 drivers/gpu/drm/vkms/vkms_drv.c       | 134 ++++++++++++++++++++++++++++++---
 drivers/gpu/drm/vkms/vkms_drv.h       |  43 -----------
 drivers/gpu/drm/vkms/vkms_output.c    | 135 ----------------------------------
 drivers/gpu/drm/vkms/vkms_writeback.c |  20 +++--
 drivers/gpu/drm/vkms/vkms_writeback.h |   2 +-
 9 files changed, 197 insertions(+), 243 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c
index 15ef07ed304e..9b2f578c2eb1 100644
--- a/drivers/gpu/drm/vkms/vkms_composer.c
+++ b/drivers/gpu/drm/vkms/vkms_composer.c
@@ -515,7 +515,7 @@ void vkms_composer_worker(struct work_struct *work)
 							  composer_work);
 	struct drm_crtc *crtc = crtc_state->base.crtc;
 	struct vkms_writeback_job *active_wb = crtc_state->active_writeback;
-	struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
+	struct vkms_crtc *out = drm_crtc_to_vkms_crtc(crtc);
 	bool crc_pending, wb_pending;
 	u64 frame_start, frame_end;
 	u32 crc32 = 0;
@@ -616,12 +616,12 @@ int vkms_verify_crc_source(struct drm_crtc *crtc, const char *src_name,
 	return 0;
 }
 
-void vkms_set_composer(struct vkms_output *out, bool enabled)
+void vkms_set_composer(struct vkms_crtc *out, bool enabled)
 {
 	bool old_enabled;
 
 	if (enabled)
-		drm_crtc_vblank_get(&out->crtc);
+		drm_crtc_vblank_get(&out->base);
 
 	spin_lock_irq(&out->lock);
 	old_enabled = out->composer_enabled;
@@ -629,12 +629,12 @@ void vkms_set_composer(struct vkms_output *out, bool enabled)
 	spin_unlock_irq(&out->lock);
 
 	if (old_enabled)
-		drm_crtc_vblank_put(&out->crtc);
+		drm_crtc_vblank_put(&out->base);
 }
 
 int vkms_set_crc_source(struct drm_crtc *crtc, const char *src_name)
 {
-	struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
+	struct vkms_crtc *out = drm_crtc_to_vkms_crtc(crtc);
 	bool enabled = false;
 	int ret = 0;
 
diff --git a/drivers/gpu/drm/vkms/vkms_composer.h b/drivers/gpu/drm/vkms/vkms_composer.h
index 91b33af1e013..77efd2e3a63a 100644
--- a/drivers/gpu/drm/vkms/vkms_composer.h
+++ b/drivers/gpu/drm/vkms/vkms_composer.h
@@ -7,7 +7,7 @@
 #include "vkms_crtc.h"
 
 void vkms_composer_worker(struct work_struct *work);
-void vkms_set_composer(struct vkms_output *out, bool enabled);
+void vkms_set_composer(struct vkms_crtc *out, bool enabled);
 
 /* CRC Support */
 const char *const *vkms_get_crc_sources(struct drm_crtc *crtc, size_t *count);
diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
index 6fae43932b60..47e62fb3e404 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.c
+++ b/drivers/gpu/drm/vkms/vkms_crtc.c
@@ -6,6 +6,8 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_vblank.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_gem_atomic_helper.h>
 #include <drm/drm_print.h>
 
 #include "vkms_crtc.h"
@@ -14,9 +16,8 @@
 
 static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
 {
-	struct vkms_output *output = container_of(timer, struct vkms_output,
-						  vblank_hrtimer);
-	struct drm_crtc *crtc = &output->crtc;
+	struct vkms_crtc *output = hrtimer_to_vkms_crtc(timer);
+	struct drm_crtc *crtc = &output->base;
 	struct vkms_crtc_state *state;
 	u64 ret_overrun;
 	bool ret, fence_cookie;
@@ -64,8 +65,9 @@ static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
 
 static int vkms_enable_vblank(struct drm_crtc *crtc)
 {
+	struct drm_device *dev = crtc->dev;
 	struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
-	struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
+	struct vkms_crtc *out = drm_crtc_to_vkms_crtc(crtc);
 
 	drm_calc_timestamping_constants(crtc, &crtc->mode);
 
@@ -79,7 +81,7 @@ static int vkms_enable_vblank(struct drm_crtc *crtc)
 
 static void vkms_disable_vblank(struct drm_crtc *crtc)
 {
-	struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
+	struct vkms_crtc *out = drm_crtc_to_vkms_crtc(crtc);
 
 	hrtimer_cancel(&out->vblank_hrtimer);
 }
@@ -89,8 +91,7 @@ static bool vkms_get_vblank_timestamp(struct drm_crtc *crtc,
 				      bool in_vblank_irq)
 {
 	struct drm_device *dev = crtc->dev;
-	struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev);
-	struct vkms_output *output = &vkmsdev->output;
+	struct vkms_crtc *output = drm_crtc_to_vkms_crtc(crtc);
 	struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
 
 	if (!READ_ONCE(vblank->enabled)) {
@@ -137,7 +138,7 @@ vkms_atomic_crtc_duplicate_state(struct drm_crtc *crtc)
 static void vkms_atomic_crtc_destroy_state(struct drm_crtc *crtc,
 					   struct drm_crtc_state *state)
 {
-	struct vkms_crtc_state *vkms_state = to_vkms_crtc_state(state);
+	struct vkms_crtc_state *vkms_state = drm_crtc_state_to_vkms_crtc_state(state);
 
 	__drm_atomic_helper_crtc_destroy_state(state);
 
@@ -178,7 +179,7 @@ static int vkms_crtc_atomic_check(struct drm_crtc *crtc,
 {
 	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
 									  crtc);
-	struct vkms_crtc_state *vkms_state = to_vkms_crtc_state(crtc_state);
+	struct vkms_crtc_state *vkms_state = drm_crtc_state_to_vkms_crtc_state(crtc_state);
 	struct drm_plane *plane;
 	struct drm_plane_state *plane_state;
 	int i = 0, ret;
@@ -234,7 +235,7 @@ static void vkms_crtc_atomic_disable(struct drm_crtc *crtc,
 static void vkms_crtc_atomic_begin(struct drm_crtc *crtc,
 				   struct drm_atomic_state *state)
 {
-	struct vkms_output *vkms_output = drm_crtc_to_vkms_output(crtc);
+	struct vkms_crtc *vkms_output = drm_crtc_to_vkms_crtc(crtc);
 
 	/* This lock is held across the atomic commit to block vblank timer
 	 * from scheduling vkms_composer_worker until the composer is updated
@@ -245,7 +246,7 @@ static void vkms_crtc_atomic_begin(struct drm_crtc *crtc,
 static void vkms_crtc_atomic_flush(struct drm_crtc *crtc,
 				   struct drm_atomic_state *state)
 {
-	struct vkms_output *vkms_output = drm_crtc_to_vkms_output(crtc);
+	struct vkms_crtc *vkms_output = drm_crtc_to_vkms_crtc(crtc);
 
 	if (crtc->state->event) {
 		spin_lock(&crtc->dev->event_lock);
@@ -260,7 +261,7 @@ static void vkms_crtc_atomic_flush(struct drm_crtc *crtc,
 		crtc->state->event = NULL;
 	}
 
-	vkms_output->composer_state = to_vkms_crtc_state(crtc->state);
+	vkms_output->composer_state = drm_crtc_state_to_vkms_crtc_state(crtc->state);
 
 	spin_unlock_irq(&vkms_output->lock);
 }
@@ -273,30 +274,48 @@ static const struct drm_crtc_helper_funcs vkms_crtc_helper_funcs = {
 	.atomic_disable	= vkms_crtc_atomic_disable,
 };
 
-int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
-		   struct drm_plane *primary, struct drm_plane *cursor)
+static void vkms_crtc_destroy_workqueue(struct drm_device *dev, void *raw_vkms_crtc)
+{
+	struct vkms_crtc *vkms_crtc = raw_vkms_crtc;
+
+	destroy_workqueue(vkms_crtc->composer_workq);
+}
+
+struct vkms_crtc *vkms_crtc_init(struct vkms_device *vkmsdev,
+				 struct drm_plane *primary,
+				 struct drm_plane *cursor)
 {
-	struct vkms_output *vkms_out = drm_crtc_to_vkms_output(crtc);
+	struct drm_device *dev = &vkmsdev->drm;
+	struct vkms_crtc *vkms_crtc;
 	int ret;
 
-	ret = drmm_crtc_init_with_planes(dev, crtc, primary, cursor,
-					 &vkms_crtc_funcs, NULL);
+	vkms_crtc = drmm_crtc_alloc_with_planes(dev, struct vkms_crtc, base, primary, cursor,
+						&vkms_crtc_funcs, NULL);
+	if (IS_ERR(vkms_crtc)) {
+		DRM_DEV_ERROR(vkmsdev->drm.dev, "Failed to init CRTC\n");
+		return vkms_crtc;
+	}
+
+	drm_crtc_helper_add(&vkms_crtc->base, &vkms_crtc_helper_funcs);
+
+	ret = drm_mode_crtc_set_gamma_size(&vkms_crtc->base, VKMS_LUT_SIZE);
 	if (ret) {
-		DRM_ERROR("Failed to init CRTC\n");
-		return ret;
+		DRM_DEV_ERROR(vkmsdev->drm.dev, "Failed to set gamma size\n");
+		return ERR_PTR(ret);
 	}
 
-	drm_crtc_helper_add(crtc, &vkms_crtc_helper_funcs);
+	drm_crtc_enable_color_mgmt(&vkms_crtc->base, 0, false, VKMS_LUT_SIZE);
 
-	drm_mode_crtc_set_gamma_size(crtc, VKMS_LUT_SIZE);
-	drm_crtc_enable_color_mgmt(crtc, 0, false, VKMS_LUT_SIZE);
+	spin_lock_init(&vkms_crtc->lock);
+	spin_lock_init(&vkms_crtc->composer_lock);
 
-	spin_lock_init(&vkms_out->lock);
-	spin_lock_init(&vkms_out->composer_lock);
+	vkms_crtc->composer_workq = alloc_ordered_workqueue("vkms_composer", 0);
+	if (!vkms_crtc->composer_workq)
+		return ERR_PTR(-ENOMEM);
 
-	vkms_out->composer_workq = alloc_ordered_workqueue("vkms_composer", 0);
-	if (!vkms_out->composer_workq)
-		return -ENOMEM;
+	ret = drmm_add_action_or_reset(&vkmsdev->drm, vkms_crtc_destroy_workqueue, vkms_crtc);
+	if (ret)
+		return ERR_PTR(ret);
 
-	return ret;
+	return vkms_crtc;
 }
diff --git a/drivers/gpu/drm/vkms/vkms_crtc.h b/drivers/gpu/drm/vkms/vkms_crtc.h
index 9f5ce21f3425..dde28884a0a5 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.h
+++ b/drivers/gpu/drm/vkms/vkms_crtc.h
@@ -48,7 +48,6 @@ struct vkms_crtc_state {
  * @wb_connecter: DRM writeback connector used for this output
  * @vblank_hrtimer:
  * @period_ns:
- * @event:
  * @composer_workq: Ordered workqueue for composer_work
  * @lock: Lock used to project concurrent acces to the composer
  * @composer_enabled: Protected by @lock.
@@ -61,7 +60,6 @@ struct vkms_crtc {
 	struct drm_writeback_connector wb_connector;
 	struct hrtimer vblank_hrtimer;
 	ktime_t period_ns;
-	struct drm_pending_vblank_event *event;
 	struct workqueue_struct *composer_workq;
 	spinlock_t lock;
 
@@ -71,17 +69,22 @@ struct vkms_crtc {
 	spinlock_t composer_lock;
 };
 
-#define to_vkms_crtc_state(target)\
+#define drm_crtc_state_to_vkms_crtc_state(target)\
 	container_of(target, struct vkms_crtc_state, base)
 
+#define drm_crtc_to_vkms_crtc(target) \
+	container_of(target, struct vkms_crtc, base)
+
+#define hrtimer_to_vkms_crtc(target) \
+	container_of(target, struct vkms_crtc, vblank_hrtimer)
+
 /**
  * vkms_crtc_init() - Initialize a crtc for vkms
- * @dev: drm_device associated with the vkms buffer
- * @crtc: uninitialized crtc device
+ * @vkmsdev: drm_device associated with the vkms buffer
  * @primary: primary plane to attach to the crtc
  * @cursor plane to attach to the crtc
  */
-int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
-		   struct drm_plane *primary, struct drm_plane *cursor);
-
+struct vkms_crtc *vkms_crtc_init(struct vkms_device *vkmsdev,
+				 struct drm_plane *primary,
+				 struct drm_plane *cursor);
 #endif //_VKMS_CRTC_H
diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index 5907877bdfa0..e79832e10f3c 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -31,6 +31,7 @@
 
 #include <drm/drm_print.h>
 #include <drm/drm_debugfs.h>
+#include <drm/drm_edid.h>
 
 #define DRIVER_NAME	"vkms"
 #define DRIVER_DESC	"Virtual Kernel Mode Setting"
@@ -46,7 +47,8 @@ MODULE_PARM_DESC(enable_cursor, "Enable/Disable cursor support");
 
 static bool enable_writeback = true;
 module_param_named(enable_writeback, enable_writeback, bool, 0444);
-MODULE_PARM_DESC(enable_writeback, "Enable/Disable writeback connector support");
+MODULE_PARM_DESC(enable_writeback,
+		 "Enable/Disable writeback connector support");
 
 static bool enable_overlay;
 module_param_named(enable_overlay, enable_overlay, bool, 0444);
@@ -54,14 +56,6 @@ MODULE_PARM_DESC(enable_overlay, "Enable/Disable overlay support");
 
 DEFINE_DRM_GEM_FOPS(vkms_driver_fops);
 
-static void vkms_release(struct drm_device *dev)
-{
-	struct vkms_device *vkms = drm_device_to_vkms_device(dev);
-
-	if (vkms->output.composer_workq)
-		destroy_workqueue(vkms->output.composer_workq);
-}
-
 static void vkms_atomic_commit_tail(struct drm_atomic_state *old_state)
 {
 	struct drm_device *dev = old_state->dev;
@@ -82,7 +76,8 @@ static void vkms_atomic_commit_tail(struct drm_atomic_state *old_state)
 	drm_atomic_helper_wait_for_flip_done(dev, old_state);
 
 	for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) {
-		struct vkms_crtc_state *vkms_state = to_vkms_crtc_state(old_crtc_state);
+		struct vkms_crtc_state *vkms_state =
+			drm_crtc_state_to_vkms_crtc_state(old_crtc_state);
 
 		flush_work(&vkms_state->composer_work);
 	}
@@ -109,7 +104,6 @@ static const struct drm_debugfs_info vkms_config_debugfs_list[] = {
 
 static const struct drm_driver vkms_driver = {
 	.driver_features	= DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_GEM,
-	.release		= vkms_release,
 	.fops			= &vkms_driver_fops,
 	DRM_GEM_SHMEM_DRIVER_OPS,
 
@@ -148,6 +142,124 @@ static const struct drm_mode_config_helper_funcs vkms_mode_config_helpers = {
 	.atomic_commit_tail = vkms_atomic_commit_tail,
 };
 
+static const struct drm_connector_funcs vkms_connector_funcs = {
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static const struct drm_encoder_funcs vkms_encoder_funcs = {};
+
+static int vkms_conn_get_modes(struct drm_connector *connector)
+{
+	int count;
+
+	/* Use the default modes list from drm */
+	count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
+	drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
+
+	return count;
+}
+
+static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
+	.get_modes = vkms_conn_get_modes,
+};
+
+static int vkms_output_init(struct vkms_device *vkmsdev, int possible_crtc)
+{
+	struct drm_device *dev = &vkmsdev->drm;
+	struct drm_connector *connector;
+	struct drm_encoder *encoder;
+	struct vkms_crtc *crtc;
+	struct drm_plane *plane;
+	struct vkms_plane *primary, *cursor, *overlay = NULL;
+	int ret;
+	int writeback;
+	unsigned int n;
+
+	/*
+	 * Initialize used plane. One primary plane is required to perform the composition.
+	 *
+	 * The overlay and cursor planes are not mandatory, but can be used to perform complex
+	 * composition.
+	 */
+	primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, possible_crtc);
+	if (IS_ERR(primary))
+		return PTR_ERR(primary);
+
+	if (vkmsdev->config->overlay) {
+		for (n = 0; n < NUM_OVERLAY_PLANES; n++) {
+			overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, possible_crtc);
+			if (IS_ERR(overlay))
+				return PTR_ERR(overlay);
+		}
+	}
+
+	if (vkmsdev->config->cursor) {
+		cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, possible_crtc);
+		if (IS_ERR(cursor))
+			return PTR_ERR(cursor);
+	}
+
+	/* [1]: Initialize the crtc component */
+	crtc = vkms_crtc_init(vkmsdev, &primary->base,
+			      cursor ? &cursor->base : NULL);
+	if (IS_ERR(crtc))
+		return PTR_ERR(crtc);
+
+	/* Enable the output's CRTC for all the planes */
+	drm_for_each_plane(plane, &vkmsdev->drm) {
+		plane->possible_crtcs |= drm_crtc_mask(&crtc->base);
+	}
+
+	/* Initialize the connector component */
+	connector = drmm_kzalloc(&vkmsdev->drm, sizeof(*connector), GFP_KERNEL);
+	if (!connector)
+		return -ENOMEM;
+
+	ret = drmm_connector_init(dev, connector, &vkms_connector_funcs,
+				  DRM_MODE_CONNECTOR_VIRTUAL, NULL);
+	if (ret) {
+		DRM_ERROR("Failed to init connector\n");
+		return ret;
+	}
+
+	drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
+
+	/* Initialize the encoder component */
+	encoder = drmm_kzalloc(&vkmsdev->drm, sizeof(*encoder), GFP_KERNEL);
+	if (!encoder)
+		return -ENOMEM;
+
+	ret = drmm_encoder_init(dev, encoder, &vkms_encoder_funcs,
+				DRM_MODE_ENCODER_VIRTUAL, NULL);
+	if (ret) {
+		DRM_ERROR("Failed to init encoder\n");
+		return ret;
+	}
+
+	encoder->possible_crtcs = drm_crtc_mask(&crtc->base);
+
+	/* Attach the encoder and the connector */
+	ret = drm_connector_attach_encoder(connector, encoder);
+	if (ret) {
+		DRM_ERROR("Failed to attach connector to encoder\n");
+		return ret;
+	}
+
+	/* Initialize the writeback component */
+	if (vkmsdev->config->writeback) {
+		writeback = vkms_enable_writeback_connector(vkmsdev, crtc);
+		if (writeback)
+			DRM_ERROR("Failed to init writeback connector\n");
+	}
+
+	drm_mode_config_reset(dev);
+
+	return 0;
+}
+
 static int vkms_modeset_init(struct vkms_device *vkmsdev)
 {
 	struct drm_device *dev = &vkmsdev->drm;
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 2c9d1f20ce84..08d0ef106e37 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -25,35 +25,6 @@
 
 #define VKMS_LUT_SIZE 256
 
-/**
- * struct vkms_output - Internal representation of all output components in vkms
- *
- * @crtc: Base crtc in drm
- * @encoder: DRM encoder used for this output
- * @connector: DRM connector used for this output
- * @wb_connecter: DRM writeback connector used for this output
- * @vblank_hrtimer:
- * @period_ns:
- * @composer_workq: Ordered workqueue for composer_work
- * @lock: Lock used to project concurrent acces to the composer
- * @composer_enabled: Protected by @lock.
- * @composer_state:
- * @composer_lock: Lock used internally to protect @composer_state members
- */
-struct vkms_output {
-	struct drm_crtc crtc;
-	struct drm_writeback_connector wb_connector;
-	struct hrtimer vblank_hrtimer;
-	ktime_t period_ns;
-	struct workqueue_struct *composer_workq;
-	spinlock_t lock;
-
-	bool composer_enabled;
-	struct vkms_crtc_state *composer_state;
-
-	spinlock_t composer_lock;
-};
-
 /**
  * struct vkms_config - General configuration for VKMS driver
  *
@@ -80,7 +51,6 @@ struct vkms_config {
 struct vkms_device {
 	struct drm_device drm;
 	struct platform_device *platform;
-	struct vkms_output output;
 	const struct vkms_config *config;
 };
 
@@ -88,20 +58,7 @@ struct vkms_device {
  * The following helpers are used to convert a member of a struct into its parent.
  */
 
-#define drm_crtc_to_vkms_output(target) \
-	container_of(target, struct vkms_output, crtc)
-
 #define drm_device_to_vkms_device(target) \
 	container_of(target, struct vkms_device, drm)
 
-/**
- * vkms_output_init() - Initialize all sub-components needed for a vkms device.
- *
- * @vkmsdev: vkms device to initialize
- * @possible_crtc_index: Crtc which can be attached to the planes. The caller must ensure that
- * possible_crtc_index is positive and less or equals to 31.
- */
-
-int vkms_output_init(struct vkms_device *vkmsdev, int possible_crtc_index);
-
 #endif /* _VKMS_DRV_H_ */
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
deleted file mode 100644
index cb8507917b5f..000000000000
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ /dev/null
@@ -1,135 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_edid.h>
-#include <drm/drm_probe_helper.h>
-#include <drm/drm_managed.h>
-
-#include "vkms_writeback.h"
-#include "vkms_plane.h"
-#include "vkms_crtc.h"
-
-static const struct drm_connector_funcs vkms_connector_funcs = {
-	.fill_modes = drm_helper_probe_single_connector_modes,
-	.reset = drm_atomic_helper_connector_reset,
-	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
-	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-static const struct drm_encoder_funcs vkms_encoder_funcs = {};
-
-static int vkms_conn_get_modes(struct drm_connector *connector)
-{
-	int count;
-
-	/* Use the default modes list from drm */
-	count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
-	drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
-
-	return count;
-}
-
-static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
-	.get_modes    = vkms_conn_get_modes,
-};
-
-static int vkms_add_overlay_plane(struct vkms_device *vkmsdev, int possible_crtc_index,
-				  struct drm_crtc *crtc)
-{
-	struct vkms_plane *overlay;
-
-	overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, possible_crtc_index);
-	if (IS_ERR(overlay))
-		return PTR_ERR(overlay);
-
-	if (!overlay->base.possible_crtcs)
-		overlay->base.possible_crtcs = drm_crtc_mask(crtc);
-
-	return 0;
-}
-
-int vkms_output_init(struct vkms_device *vkmsdev, int possible_crtc_index)
-{
-	struct vkms_output *output = &vkmsdev->output;
-	struct drm_device *dev = &vkmsdev->drm;
-	struct drm_connector *connector;
-	struct drm_encoder *encoder;
-	struct drm_crtc *crtc = &output->crtc;
-	struct vkms_plane *primary, *cursor = NULL;
-	int ret;
-	int writeback;
-	unsigned int n;
-
-	/*
-	 * Initialize used plane. One primary plane is required to perform the composition.
-	 *
-	 * The overlay and cursor planes are not mandatory, but can be used to perform complex
-	 * composition.
-	 */
-	primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, possible_crtc_index);
-	if (IS_ERR(primary))
-		return PTR_ERR(primary);
-
-	if (vkmsdev->config->overlay) {
-		for (n = 0; n < NUM_OVERLAY_PLANES; n++) {
-			ret = vkms_add_overlay_plane(vkmsdev, possible_crtc_index, crtc);
-			if (ret)
-				return ret;
-		}
-	}
-
-	if (vkmsdev->config->cursor) {
-		cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, possible_crtc_index);
-		if (IS_ERR(cursor))
-			return PTR_ERR(cursor);
-	}
-
-	ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base);
-	if (ret)
-		return ret;
-
-	connector = drmm_kzalloc(&vkmsdev->drm, sizeof(*connector), GFP_KERNEL);
-	if (!connector)
-		return -ENOMEM;
-
-	ret = drmm_connector_init(dev, connector, &vkms_connector_funcs,
-				  DRM_MODE_CONNECTOR_VIRTUAL, NULL);
-	if (ret) {
-		DRM_ERROR("Failed to init connector\n");
-		return ret;
-	}
-
-	drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
-
-	encoder = drmm_kzalloc(&vkmsdev->drm, sizeof(*encoder), GFP_KERNEL);
-	if (!encoder)
-		return -ENOMEM;
-
-	ret = drmm_encoder_init(dev, encoder, &vkms_encoder_funcs,
-				DRM_MODE_ENCODER_VIRTUAL, NULL);
-	if (ret) {
-		DRM_ERROR("Failed to init encoder\n");
-		return ret;
-	}
-	/*
-	 * This is an hardcoded value to select crtc for the encoder.
-	 * 1 here designate the first registered CRTC, the one allocated in [1]
-	 */
-	encoder->possible_crtcs = 1;
-
-	ret = drm_connector_attach_encoder(connector, encoder);
-	if (ret) {
-		DRM_ERROR("Failed to attach connector to encoder\n");
-		return ret;
-	}
-
-	if (vkmsdev->config->writeback) {
-		writeback = vkms_enable_writeback_connector(vkmsdev);
-		if (writeback)
-			DRM_ERROR("Failed to init writeback connector\n");
-	}
-
-	drm_mode_config_reset(dev);
-
-	return 0;
-}
diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c
index 5e75880a5845..322e247979b2 100644
--- a/drivers/gpu/drm/vkms/vkms_writeback.c
+++ b/drivers/gpu/drm/vkms/vkms_writeback.c
@@ -110,7 +110,7 @@ static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector,
 				struct drm_writeback_job *job)
 {
 	struct vkms_writeback_job *vkmsjob = job->priv;
-	struct vkms_device *vkmsdev;
+	struct vkms_crtc *vkms_crtc = container_of(connector, struct vkms_crtc, wb_connector);
 
 	if (!job->fb)
 		return;
@@ -119,8 +119,7 @@ static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector,
 
 	drm_framebuffer_put(vkmsjob->wb_frame_info.fb);
 
-	vkmsdev = drm_device_to_vkms_device(job->fb->dev);
-	vkms_set_composer(&vkmsdev->output, false);
+	vkms_set_composer(vkms_crtc, false);
 	kfree(vkmsjob);
 }
 
@@ -129,10 +128,8 @@ static void vkms_wb_atomic_commit(struct drm_connector *conn,
 {
 	struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state,
 											 conn);
-	struct vkms_device *vkmsdev = drm_device_to_vkms_device(conn->dev);
-	struct vkms_output *output = &vkmsdev->output;
+	struct vkms_crtc *output = drm_crtc_to_vkms_crtc(connector_state->crtc);
 	struct drm_writeback_connector *wb_conn = &output->wb_connector;
-	struct drm_connector_state *conn_state = wb_conn->base.state;
 	struct vkms_crtc_state *crtc_state = output->composer_state;
 	struct drm_framebuffer *fb = connector_state->writeback_job->fb;
 	u16 crtc_height = crtc_state->base.crtc->mode.vdisplay;
@@ -141,12 +138,12 @@ static void vkms_wb_atomic_commit(struct drm_connector *conn,
 	struct vkms_frame_info *wb_frame_info;
 	u32 wb_format = fb->format->format;
 
-	if (!conn_state)
+	if (!connector_state)
 		return;
 
-	vkms_set_composer(&vkmsdev->output, true);
+	vkms_set_composer(output, true);
 
-	active_wb = conn_state->writeback_job->priv;
+	active_wb = connector_state->writeback_job->priv;
 	wb_frame_info = &active_wb->wb_frame_info;
 
 	spin_lock_irq(&output->composer_lock);
@@ -167,9 +164,10 @@ static const struct drm_connector_helper_funcs vkms_wb_conn_helper_funcs = {
 	.atomic_check = vkms_wb_atomic_check,
 };
 
-int vkms_enable_writeback_connector(struct vkms_device *vkmsdev)
+int vkms_enable_writeback_connector(struct vkms_device *vkmsdev,
+				    struct vkms_crtc *vkms_crtc)
 {
-	struct drm_writeback_connector *wb = &vkmsdev->output.wb_connector;
+	struct drm_writeback_connector *wb = &vkms_crtc->wb_connector;
 
 	drm_connector_helper_add(&wb->base, &vkms_wb_conn_helper_funcs);
 
diff --git a/drivers/gpu/drm/vkms/vkms_writeback.h b/drivers/gpu/drm/vkms/vkms_writeback.h
index 44dff15faff6..39613a2408be 100644
--- a/drivers/gpu/drm/vkms/vkms_writeback.h
+++ b/drivers/gpu/drm/vkms/vkms_writeback.h
@@ -16,6 +16,6 @@ struct vkms_writeback_job {
 };
 
 /* Writeback */
-int vkms_enable_writeback_connector(struct vkms_device *vkmsdev);
+int vkms_enable_writeback_connector(struct vkms_device *vkmsdev, struct vkms_crtc *vkms_crtc);
 
 #endif //_VKMS_WRITEBACK_H

-- 
2.44.2

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