1 files changed, 644 insertions, 0 deletions

diff --git a/drivers/gpu/drm/gud/gud_pipe.c b/drivers/gpu/drm/gud/gud_pipe.c
new file mode 100644
index 000000000000..76d77a736d84
--- /dev/null
+++ b/drivers/gpu/drm/gud/gud_pipe.c
@@ -0,0 +1,644 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright 2020 Noralf Trønnes
+ */
+
+#include <linux/lz4.h>
+#include <linux/usb.h>
+#include <linux/vmalloc.h>
+#include <linux/workqueue.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_format_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_gem_atomic_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_print.h>
+#include <drm/drm_rect.h>
+#include <drm/gud.h>
+
+#include "gud_internal.h"
+
+/*
+ * Some userspace rendering loops run all displays in the same loop.
+ * This means that a fast display will have to wait for a slow one.
+ * Such users might want to enable this module parameter.
+ */
+static bool gud_async_flush;
+module_param_named(async_flush, gud_async_flush, bool, 0644);
+MODULE_PARM_DESC(async_flush, "Enable asynchronous flushing [default=0]");
+
+/*
+ * FIXME: The driver is probably broken on Big Endian machines.
+ * See discussion:
+ * https://lore.kernel.org/dri-devel/CAKb7UvihLX0hgBOP3VBG7O+atwZcUVCPVuBdfmDMpg0NjXe-cQ@mail.gmail.com/
+ */
+
+static bool gud_is_big_endian(void)
+{
+#if defined(__BIG_ENDIAN)
+	return true;
+#else
+	return false;
+#endif
+}
+
+static size_t gud_xrgb8888_to_r124(u8 *dst, const struct drm_format_info *format,
+				   void *src, struct drm_framebuffer *fb,
+				   struct drm_rect *rect,
+				   struct drm_format_conv_state *fmtcnv_state)
+{
+	unsigned int block_width = drm_format_info_block_width(format, 0);
+	unsigned int bits_per_pixel = 8 / block_width;
+	unsigned int x, y, width, height;
+	u8 pix, *pix8, *block = dst; /* Assign to silence compiler warning */
+	struct iosys_map dst_map, vmap;
+	size_t len;
+	void *buf;
+
+	drm_WARN_ON_ONCE(fb->dev, format->char_per_block[0] != 1);
+
+	/* Start on a byte boundary */
+	rect->x1 = ALIGN_DOWN(rect->x1, block_width);
+	width = drm_rect_width(rect);
+	height = drm_rect_height(rect);
+	len = drm_format_info_min_pitch(format, 0, width) * height;
+
+	buf = kmalloc_array(height, width, GFP_KERNEL);
+	if (!buf)
+		return 0;
+
+	iosys_map_set_vaddr(&dst_map, buf);
+	iosys_map_set_vaddr(&vmap, src);
+	drm_fb_xrgb8888_to_gray8(&dst_map, NULL, &vmap, fb, rect, fmtcnv_state);
+	pix8 = buf;
+
+	for (y = 0; y < height; y++) {
+		for (x = 0; x < width; x++) {
+			unsigned int pixpos = x % block_width; /* within byte from the left */
+			unsigned int pixshift = (block_width - pixpos - 1) * bits_per_pixel;
+
+			if (!pixpos) {
+				block = dst++;
+				*block = 0;
+			}
+
+			pix = (*pix8++) >> (8 - bits_per_pixel);
+			*block |= pix << pixshift;
+		}
+	}
+
+	kfree(buf);
+
+	return len;
+}
+
+static size_t gud_xrgb8888_to_color(u8 *dst, const struct drm_format_info *format,
+				    void *src, struct drm_framebuffer *fb,
+				    struct drm_rect *rect)
+{
+	unsigned int block_width = drm_format_info_block_width(format, 0);
+	unsigned int bits_per_pixel = 8 / block_width;
+	u8 r, g, b, pix, *block = dst; /* Assign to silence compiler warning */
+	unsigned int x, y, width;
+	__le32 *sbuf32;
+	u32 pix32;
+	size_t len;
+
+	/* Start on a byte boundary */
+	rect->x1 = ALIGN_DOWN(rect->x1, block_width);
+	width = drm_rect_width(rect);
+	len = drm_format_info_min_pitch(format, 0, width) * drm_rect_height(rect);
+
+	for (y = rect->y1; y < rect->y2; y++) {
+		sbuf32 = src + (y * fb->pitches[0]);
+		sbuf32 += rect->x1;
+
+		for (x = 0; x < width; x++) {
+			unsigned int pixpos = x % block_width; /* within byte from the left */
+			unsigned int pixshift = (block_width - pixpos - 1) * bits_per_pixel;
+
+			if (!pixpos) {
+				block = dst++;
+				*block = 0;
+			}
+
+			pix32 = le32_to_cpu(*sbuf32++);
+			r = pix32 >> 16;
+			g = pix32 >> 8;
+			b = pix32;
+
+			switch (format->format) {
+			case GUD_DRM_FORMAT_XRGB1111:
+				pix = ((r >> 7) << 2) | ((g >> 7) << 1) | (b >> 7);
+				break;
+			default:
+				drm_WARN_ON_ONCE(fb->dev, 1);
+				return len;
+			}
+
+			*block |= pix << pixshift;
+		}
+	}
+
+	return len;
+}
+
+static int gud_prep_flush(struct gud_device *gdrm, struct drm_framebuffer *fb,
+			  const struct iosys_map *src, bool cached_reads,
+			  const struct drm_format_info *format, struct drm_rect *rect,
+			  struct gud_set_buffer_req *req,
+			  struct drm_format_conv_state *fmtcnv_state)
+{
+	u8 compression = gdrm->compression;
+	struct iosys_map dst;
+	void *vaddr, *buf;
+	size_t pitch, len;
+
+	pitch = drm_format_info_min_pitch(format, 0, drm_rect_width(rect));
+	len = pitch * drm_rect_height(rect);
+	if (len > gdrm->bulk_len)
+		return -E2BIG;
+
+	vaddr = src[0].vaddr;
+retry:
+	if (compression)
+		buf = gdrm->compress_buf;
+	else
+		buf = gdrm->bulk_buf;
+	iosys_map_set_vaddr(&dst, buf);
+
+	/*
+	 * Imported buffers are assumed to be write-combined and thus uncached
+	 * with slow reads (at least on ARM).
+	 */
+	if (format != fb->format) {
+		if (format->format == GUD_DRM_FORMAT_R1) {
+			len = gud_xrgb8888_to_r124(buf, format, vaddr, fb, rect, fmtcnv_state);
+			if (!len)
+				return -ENOMEM;
+		} else if (format->format == DRM_FORMAT_R8) {
+			drm_fb_xrgb8888_to_gray8(&dst, NULL, src, fb, rect, fmtcnv_state);
+		} else if (format->format == DRM_FORMAT_RGB332) {
+			drm_fb_xrgb8888_to_rgb332(&dst, NULL, src, fb, rect, fmtcnv_state);
+		} else if (format->format == DRM_FORMAT_RGB565) {
+			if (gud_is_big_endian()) {
+				drm_fb_xrgb8888_to_rgb565be(&dst, NULL, src, fb, rect,
+							    fmtcnv_state);
+			} else {
+				drm_fb_xrgb8888_to_rgb565(&dst, NULL, src, fb, rect,
+							  fmtcnv_state);
+			}
+		} else if (format->format == DRM_FORMAT_RGB888) {
+			drm_fb_xrgb8888_to_rgb888(&dst, NULL, src, fb, rect, fmtcnv_state);
+		} else {
+			len = gud_xrgb8888_to_color(buf, format, vaddr, fb, rect);
+		}
+	} else if (gud_is_big_endian() && format->cpp[0] > 1) {
+		drm_fb_swab(&dst, NULL, src, fb, rect, cached_reads, fmtcnv_state);
+	} else if (compression && cached_reads && pitch == fb->pitches[0]) {
+		/* can compress directly from the framebuffer */
+		buf = vaddr + rect->y1 * pitch;
+	} else {
+		drm_fb_memcpy(&dst, NULL, src, fb, rect);
+	}
+
+	memset(req, 0, sizeof(*req));
+	req->x = cpu_to_le32(rect->x1);
+	req->y = cpu_to_le32(rect->y1);
+	req->width = cpu_to_le32(drm_rect_width(rect));
+	req->height = cpu_to_le32(drm_rect_height(rect));
+	req->length = cpu_to_le32(len);
+
+	if (compression & GUD_COMPRESSION_LZ4) {
+		int complen;
+
+		complen = LZ4_compress_default(buf, gdrm->bulk_buf, len, len, gdrm->lz4_comp_mem);
+		if (complen <= 0) {
+			compression = 0;
+			goto retry;
+		}
+
+		req->compression = GUD_COMPRESSION_LZ4;
+		req->compressed_length = cpu_to_le32(complen);
+	}
+
+	return 0;
+}
+
+struct gud_usb_bulk_context {
+	struct timer_list timer;
+	struct usb_sg_request sgr;
+};
+
+static void gud_usb_bulk_timeout(struct timer_list *t)
+{
+	struct gud_usb_bulk_context *ctx = timer_container_of(ctx, t, timer);
+
+	usb_sg_cancel(&ctx->sgr);
+}
+
+static int gud_usb_bulk(struct gud_device *gdrm, size_t len)
+{
+	struct gud_usb_bulk_context ctx;
+	int ret;
+
+	ret = usb_sg_init(&ctx.sgr, gud_to_usb_device(gdrm), gdrm->bulk_pipe, 0,
+			  gdrm->bulk_sgt.sgl, gdrm->bulk_sgt.nents, len, GFP_KERNEL);
+	if (ret)
+		return ret;
+
+	timer_setup_on_stack(&ctx.timer, gud_usb_bulk_timeout, 0);
+	mod_timer(&ctx.timer, jiffies + msecs_to_jiffies(3000));
+
+	usb_sg_wait(&ctx.sgr);
+
+	if (!timer_delete_sync(&ctx.timer))
+		ret = -ETIMEDOUT;
+	else if (ctx.sgr.status < 0)
+		ret = ctx.sgr.status;
+	else if (ctx.sgr.bytes != len)
+		ret = -EIO;
+
+	timer_destroy_on_stack(&ctx.timer);
+
+	return ret;
+}
+
+static int gud_flush_rect(struct gud_device *gdrm, struct drm_framebuffer *fb,
+			  const struct iosys_map *src, bool cached_reads,
+			  const struct drm_format_info *format, struct drm_rect *rect,
+			  struct drm_format_conv_state *fmtcnv_state)
+{
+	struct gud_set_buffer_req req;
+	size_t len, trlen;
+	int ret;
+
+	drm_dbg(&gdrm->drm, "Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
+
+	ret = gud_prep_flush(gdrm, fb, src, cached_reads, format, rect, &req, fmtcnv_state);
+	if (ret)
+		return ret;
+
+	len = le32_to_cpu(req.length);
+
+	if (req.compression)
+		trlen = le32_to_cpu(req.compressed_length);
+	else
+		trlen = len;
+
+	gdrm->stats_length += len;
+	/* Did it wrap around? */
+	if (gdrm->stats_length <= len && gdrm->stats_actual_length) {
+		gdrm->stats_length = len;
+		gdrm->stats_actual_length = 0;
+	}
+	gdrm->stats_actual_length += trlen;
+
+	if (!(gdrm->flags & GUD_DISPLAY_FLAG_FULL_UPDATE) || gdrm->prev_flush_failed) {
+		ret = gud_usb_set(gdrm, GUD_REQ_SET_BUFFER, 0, &req, sizeof(req));
+		if (ret)
+			return ret;
+	}
+
+	ret = gud_usb_bulk(gdrm, trlen);
+	if (ret)
+		gdrm->stats_num_errors++;
+
+	return ret;
+}
+
+void gud_clear_damage(struct gud_device *gdrm)
+{
+	gdrm->damage.x1 = INT_MAX;
+	gdrm->damage.y1 = INT_MAX;
+	gdrm->damage.x2 = 0;
+	gdrm->damage.y2 = 0;
+}
+
+static void gud_flush_damage(struct gud_device *gdrm, struct drm_framebuffer *fb,
+			     const struct iosys_map *src, bool cached_reads,
+			     struct drm_rect *damage)
+{
+	struct drm_format_conv_state fmtcnv_state = DRM_FORMAT_CONV_STATE_INIT;
+	const struct drm_format_info *format;
+	unsigned int i, lines;
+	size_t pitch;
+	int ret;
+
+	format = fb->format;
+	if (format->format == DRM_FORMAT_XRGB8888 && gdrm->xrgb8888_emulation_format)
+		format = gdrm->xrgb8888_emulation_format;
+
+	/* Split update if it's too big */
+	pitch = drm_format_info_min_pitch(format, 0, drm_rect_width(damage));
+	lines = drm_rect_height(damage);
+
+	if (gdrm->bulk_len < lines * pitch)
+		lines = gdrm->bulk_len / pitch;
+
+	for (i = 0; i < DIV_ROUND_UP(drm_rect_height(damage), lines); i++) {
+		struct drm_rect rect = *damage;
+
+		rect.y1 += i * lines;
+		rect.y2 = min_t(u32, rect.y1 + lines, damage->y2);
+
+		ret = gud_flush_rect(gdrm, fb, src, cached_reads, format, &rect, &fmtcnv_state);
+		if (ret) {
+			if (ret != -ENODEV && ret != -ECONNRESET &&
+			    ret != -ESHUTDOWN && ret != -EPROTO)
+				dev_err_ratelimited(fb->dev->dev,
+						    "Failed to flush framebuffer: error=%d\n", ret);
+			gdrm->prev_flush_failed = true;
+			break;
+		}
+	}
+
+	drm_format_conv_state_release(&fmtcnv_state);
+}
+
+void gud_flush_work(struct work_struct *work)
+{
+	struct gud_device *gdrm = container_of(work, struct gud_device, work);
+	struct iosys_map shadow_map;
+	struct drm_framebuffer *fb;
+	struct drm_rect damage;
+	int idx;
+
+	if (!drm_dev_enter(&gdrm->drm, &idx))
+		return;
+
+	mutex_lock(&gdrm->damage_lock);
+	fb = gdrm->fb;
+	gdrm->fb = NULL;
+	iosys_map_set_vaddr(&shadow_map, gdrm->shadow_buf);
+	damage = gdrm->damage;
+	gud_clear_damage(gdrm);
+	mutex_unlock(&gdrm->damage_lock);
+
+	if (!fb)
+		goto out;
+
+	gud_flush_damage(gdrm, fb, &shadow_map, true, &damage);
+
+	drm_framebuffer_put(fb);
+out:
+	drm_dev_exit(idx);
+}
+
+static int gud_fb_queue_damage(struct gud_device *gdrm, struct drm_framebuffer *fb,
+			       const struct iosys_map *src, struct drm_rect *damage)
+{
+	struct drm_framebuffer *old_fb = NULL;
+	struct iosys_map shadow_map;
+
+	mutex_lock(&gdrm->damage_lock);
+
+	if (!gdrm->shadow_buf) {
+		gdrm->shadow_buf = vcalloc(fb->pitches[0], fb->height);
+		if (!gdrm->shadow_buf) {
+			mutex_unlock(&gdrm->damage_lock);
+			return -ENOMEM;
+		}
+	}
+
+	iosys_map_set_vaddr(&shadow_map, gdrm->shadow_buf);
+	iosys_map_incr(&shadow_map, drm_fb_clip_offset(fb->pitches[0], fb->format, damage));
+	drm_fb_memcpy(&shadow_map, fb->pitches, src, fb, damage);
+
+	if (fb != gdrm->fb) {
+		old_fb = gdrm->fb;
+		drm_framebuffer_get(fb);
+		gdrm->fb = fb;
+	}
+
+	gdrm->damage.x1 = min(gdrm->damage.x1, damage->x1);
+	gdrm->damage.y1 = min(gdrm->damage.y1, damage->y1);
+	gdrm->damage.x2 = max(gdrm->damage.x2, damage->x2);
+	gdrm->damage.y2 = max(gdrm->damage.y2, damage->y2);
+
+	mutex_unlock(&gdrm->damage_lock);
+
+	queue_work(system_long_wq, &gdrm->work);
+
+	if (old_fb)
+		drm_framebuffer_put(old_fb);
+
+	return 0;
+}
+
+static void gud_fb_handle_damage(struct gud_device *gdrm, struct drm_framebuffer *fb,
+				 const struct iosys_map *src, struct drm_rect *damage)
+{
+	int ret;
+
+	if (gdrm->flags & GUD_DISPLAY_FLAG_FULL_UPDATE)
+		drm_rect_init(damage, 0, 0, fb->width, fb->height);
+
+	if (gud_async_flush) {
+		ret = gud_fb_queue_damage(gdrm, fb, src, damage);
+		if (ret != -ENOMEM)
+			return;
+	}
+
+	/* Imported buffers are assumed to be WriteCombined with uncached reads */
+	gud_flush_damage(gdrm, fb, src, !fb->obj[0]->import_attach, damage);
+}
+
+int gud_plane_atomic_check(struct drm_plane *plane,
+			   struct drm_atomic_state *state)
+{
+	struct gud_device *gdrm = to_gud_device(plane->dev);
+	struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_crtc *crtc = new_plane_state->crtc;
+	struct drm_crtc_state *crtc_state;
+	const struct drm_display_mode *mode;
+	struct drm_framebuffer *old_fb = old_plane_state->fb;
+	struct drm_connector_state *connector_state = NULL;
+	struct drm_framebuffer *fb = new_plane_state->fb;
+	const struct drm_format_info *format = fb->format;
+	struct drm_connector *connector;
+	unsigned int i, num_properties;
+	struct gud_state_req *req;
+	int idx, ret;
+	size_t len;
+
+	if (drm_WARN_ON_ONCE(plane->dev, !fb))
+		return -EINVAL;
+
+	if (drm_WARN_ON_ONCE(plane->dev, !crtc))
+		return -EINVAL;
+
+	crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+	mode = &crtc_state->mode;
+
+	ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
+						  DRM_PLANE_NO_SCALING,
+						  DRM_PLANE_NO_SCALING,
+						  false, false);
+	if (ret)
+		return ret;
+
+	if (!new_plane_state->visible)
+		return 0;
+
+	if (old_plane_state->rotation != new_plane_state->rotation)
+		crtc_state->mode_changed = true;
+
+	if (old_fb && old_fb->format != format)
+		crtc_state->mode_changed = true;
+
+	if (!crtc_state->mode_changed && !crtc_state->connectors_changed)
+		return 0;
+
+	/* Only one connector is supported */
+	if (hweight32(crtc_state->connector_mask) != 1)
+		return -EINVAL;
+
+	if (format->format == DRM_FORMAT_XRGB8888 && gdrm->xrgb8888_emulation_format)
+		format = gdrm->xrgb8888_emulation_format;
+
+	for_each_new_connector_in_state(state, connector, connector_state, i) {
+		if (connector_state->crtc)
+			break;
+	}
+
+	/*
+	 * DRM_IOCTL_MODE_OBJ_SETPROPERTY on the rotation property will not have
+	 * the connector included in the state.
+	 */
+	if (!connector_state) {
+		struct drm_connector_list_iter conn_iter;
+
+		drm_connector_list_iter_begin(plane->dev, &conn_iter);
+		drm_for_each_connector_iter(connector, &conn_iter) {
+			if (connector->state->crtc) {
+				connector_state = connector->state;
+				break;
+			}
+		}
+		drm_connector_list_iter_end(&conn_iter);
+	}
+
+	if (drm_WARN_ON_ONCE(plane->dev, !connector_state))
+		return -ENOENT;
+
+	len = struct_size(req, properties,
+			  size_add(GUD_PROPERTIES_MAX_NUM, GUD_CONNECTOR_PROPERTIES_MAX_NUM));
+	req = kzalloc(len, GFP_KERNEL);
+	if (!req)
+		return -ENOMEM;
+
+	gud_from_display_mode(&req->mode, mode);
+
+	req->format = gud_from_fourcc(format->format);
+	if (drm_WARN_ON_ONCE(plane->dev, !req->format)) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	req->connector = drm_connector_index(connector_state->connector);
+
+	ret = gud_connector_fill_properties(connector_state, req->properties);
+	if (ret < 0)
+		goto out;
+
+	num_properties = ret;
+	for (i = 0; i < gdrm->num_properties; i++) {
+		u16 prop = gdrm->properties[i];
+		u64 val;
+
+		switch (prop) {
+		case GUD_PROPERTY_ROTATION:
+			/* DRM UAPI matches the protocol so use value directly */
+			val = new_plane_state->rotation;
+			break;
+		default:
+			drm_WARN_ON_ONCE(plane->dev, 1);
+			ret = -EINVAL;
+			goto out;
+		}
+
+		req->properties[num_properties + i].prop = cpu_to_le16(prop);
+		req->properties[num_properties + i].val = cpu_to_le64(val);
+		num_properties++;
+	}
+
+	if (drm_dev_enter(fb->dev, &idx)) {
+		len = struct_size(req, properties, num_properties);
+		ret = gud_usb_set(gdrm, GUD_REQ_SET_STATE_CHECK, 0, req, len);
+		drm_dev_exit(idx);
+	}  else {
+		ret = -ENODEV;
+	}
+out:
+	kfree(req);
+
+	return ret;
+}
+
+void gud_plane_atomic_update(struct drm_plane *plane,
+			     struct drm_atomic_state *atomic_state)
+{
+	struct drm_device *drm = plane->dev;
+	struct gud_device *gdrm = to_gud_device(drm);
+	struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(atomic_state, plane);
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(atomic_state, plane);
+	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(new_state);
+	struct drm_framebuffer *fb = new_state->fb;
+	struct drm_crtc *crtc = new_state->crtc;
+	struct drm_rect damage;
+	struct drm_atomic_helper_damage_iter iter;
+	int ret, idx;
+
+	if (crtc->state->mode_changed || !crtc->state->enable) {
+		cancel_work_sync(&gdrm->work);
+		mutex_lock(&gdrm->damage_lock);
+		if (gdrm->fb) {
+			drm_framebuffer_put(gdrm->fb);
+			gdrm->fb = NULL;
+		}
+		gud_clear_damage(gdrm);
+		vfree(gdrm->shadow_buf);
+		gdrm->shadow_buf = NULL;
+		mutex_unlock(&gdrm->damage_lock);
+	}
+
+	if (!drm_dev_enter(drm, &idx))
+		return;
+
+	if (!old_state->fb)
+		gud_usb_set_u8(gdrm, GUD_REQ_SET_CONTROLLER_ENABLE, 1);
+
+	if (fb && (crtc->state->mode_changed || crtc->state->connectors_changed))
+		gud_usb_set(gdrm, GUD_REQ_SET_STATE_COMMIT, 0, NULL, 0);
+
+	if (crtc->state->active_changed)
+		gud_usb_set_u8(gdrm, GUD_REQ_SET_DISPLAY_ENABLE, crtc->state->active);
+
+	if (!fb)
+		goto ctrl_disable;
+
+	ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
+	if (ret)
+		goto ctrl_disable;
+
+	drm_atomic_helper_damage_iter_init(&iter, old_state, new_state);
+	drm_atomic_for_each_plane_damage(&iter, &damage)
+		gud_fb_handle_damage(gdrm, fb, &shadow_plane_state->data[0], &damage);
+
+	drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
+
+ctrl_disable:
+	if (!crtc->state->enable)
+		gud_usb_set_u8(gdrm, GUD_REQ_SET_CONTROLLER_ENABLE, 0);
+
+	drm_dev_exit(idx);
+}