Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 949 insertions, 0 deletions

diff --git a/src/VBox/Additions/linux/drm/vbox_mode.c b/src/VBox/Additions/linux/drm/vbox_mode.c
new file mode 100644
index 00000000..bfe13ced
--- /dev/null
+++ b/src/VBox/Additions/linux/drm/vbox_mode.c
@@ -0,0 +1,949 @@
+/* $Id: vbox_mode.c $ */
+/** @file
+ * VirtualBox Additions Linux kernel video driver
+ */
+
+/*
+ * Copyright (C) 2013-2023 Oracle and/or its affiliates.
+ * This file is based on ast_mode.c
+ * Copyright 2012 Red Hat Inc.
+ * Parts based on xf86-video-ast
+ * Copyright (c) 2005 ASPEED Technology Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ */
+/*
+ * Authors: Dave Airlie <airlied@redhat.com>
+ *          Michael Thayer <michael.thayer@oracle.com,
+ *          Hans de Goede <hdegoede@redhat.com>
+ */
+#include "vbox_drv.h"
+#include <linux/export.h>
+#include <drm/drm_crtc_helper.h>
+#if RTLNX_VER_MIN(6,3,0) || RTLNX_RHEL_RANGE(8,9, 8,99) || RTLNX_RHEL_RANGE(9,3, 9,99)
+# include <drm/drm_modeset_helper_vtables.h>
+# include <drm/drm_modeset_helper.h>
+#endif
+#if RTLNX_VER_MIN(3,18,0) || RTLNX_RHEL_MAJ_PREREQ(7,2)
+# include <drm/drm_plane_helper.h>
+#endif
+#if RTLNX_VER_MIN(5,1,0) || RTLNX_RHEL_MAJ_PREREQ(8,1)
+# include <drm/drm_probe_helper.h>
+#endif
+
+#if RTLNX_VER_MIN(6,0,0) || RTLNX_RHEL_RANGE(8,8, 8,99) || RTLNX_RHEL_MAJ_PREREQ(9,2) || RTLNX_SUSE_MAJ_PREREQ(15,5)
+# include <drm/drm_edid.h>
+#endif
+
+#include "VBoxVideo.h"
+
+static int vbox_cursor_set2(struct drm_crtc *crtc, struct drm_file *file_priv,
+			    u32 handle, u32 width, u32 height,
+			    s32 hot_x, s32 hot_y);
+static int vbox_cursor_move(struct drm_crtc *crtc, int x, int y);
+
+/**
+ * Set a graphics mode.  Poke any required values into registers, do an HGSMI
+ * mode set and tell the host we support advanced graphics functions.
+ */
+static void vbox_do_modeset(struct drm_crtc *crtc,
+			    const struct drm_display_mode *mode)
+{
+	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
+	struct vbox_private *vbox;
+	int width, height, bpp, pitch;
+	u16 flags;
+	s32 x_offset, y_offset;
+
+	vbox = crtc->dev->dev_private;
+	width = mode->hdisplay ? mode->hdisplay : 640;
+	height = mode->vdisplay ? mode->vdisplay : 480;
+#if RTLNX_VER_MIN(4,11,0) || RTLNX_RHEL_MAJ_PREREQ(7,5)
+	bpp = crtc->enabled ? CRTC_FB(crtc)->format->cpp[0] * 8 : 32;
+	pitch = crtc->enabled ? CRTC_FB(crtc)->pitches[0] : width * bpp / 8;
+#elif RTLNX_VER_MIN(3,3,0)
+	bpp = crtc->enabled ? CRTC_FB(crtc)->bits_per_pixel : 32;
+	pitch = crtc->enabled ? CRTC_FB(crtc)->pitches[0] : width * bpp / 8;
+#else
+	bpp = crtc->enabled ? CRTC_FB(crtc)->bits_per_pixel : 32;
+	pitch = crtc->enabled ? CRTC_FB(crtc)->pitch : width * bpp / 8;
+#endif
+	x_offset = vbox->single_framebuffer ? crtc->x : vbox_crtc->x_hint;
+	y_offset = vbox->single_framebuffer ? crtc->y : vbox_crtc->y_hint;
+
+	/*
+	 * This is the old way of setting graphics modes.  It assumed one screen
+	 * and a frame-buffer at the start of video RAM.  On older versions of
+	 * VirtualBox, certain parts of the code still assume that the first
+	 * screen is programmed this way, so try to fake it.
+	 */
+	if (vbox_crtc->crtc_id == 0 && crtc->enabled &&
+	    vbox_crtc->fb_offset / pitch < 0xffff - crtc->y &&
+	    vbox_crtc->fb_offset % (bpp / 8) == 0)
+		VBoxVideoSetModeRegisters(
+			width, height, pitch * 8 / bpp,
+#if RTLNX_VER_MIN(4,11,0) || RTLNX_RHEL_MAJ_PREREQ(7,5)
+			CRTC_FB(crtc)->format->cpp[0] * 8,
+#else
+			CRTC_FB(crtc)->bits_per_pixel,
+#endif
+			0,
+			vbox_crtc->fb_offset % pitch / bpp * 8 + crtc->x,
+			vbox_crtc->fb_offset / pitch + crtc->y);
+
+	flags = VBVA_SCREEN_F_ACTIVE;
+	flags |= (crtc->enabled && !vbox_crtc->blanked) ?
+		 0 : VBVA_SCREEN_F_BLANK;
+	flags |= vbox_crtc->disconnected ? VBVA_SCREEN_F_DISABLED : 0;
+	VBoxHGSMIProcessDisplayInfo(vbox->guest_pool, vbox_crtc->crtc_id,
+				   x_offset, y_offset, vbox_crtc->fb_offset +
+				   crtc->x * bpp / 8 + crtc->y * pitch,
+				   pitch, width, height,
+				   vbox_crtc->blanked ? 0 : bpp, flags);
+}
+
+static void vbox_crtc_dpms(struct drm_crtc *crtc, int mode)
+{
+	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
+	struct vbox_private *vbox = crtc->dev->dev_private;
+
+	switch (mode) {
+	case DRM_MODE_DPMS_ON:
+		vbox_crtc->blanked = false;
+		/* Restart the refresh timer if necessary. */
+		schedule_delayed_work(&vbox->refresh_work, VBOX_REFRESH_PERIOD);
+		break;
+	case DRM_MODE_DPMS_STANDBY:
+	case DRM_MODE_DPMS_SUSPEND:
+	case DRM_MODE_DPMS_OFF:
+		vbox_crtc->blanked = true;
+		break;
+	}
+
+	mutex_lock(&vbox->hw_mutex);
+	vbox_do_modeset(crtc, &crtc->hwmode);
+	mutex_unlock(&vbox->hw_mutex);
+}
+
+static bool vbox_crtc_mode_fixup(struct drm_crtc *crtc,
+				 const struct drm_display_mode *mode,
+				 struct drm_display_mode *adjusted_mode)
+{
+	return true;
+}
+
+/*
+ * Try to map the layout of virtual screens to the range of the input device.
+ * Return true if we need to re-set the crtc modes due to screen offset
+ * changes.
+ */
+static bool vbox_set_up_input_mapping(struct vbox_private *vbox)
+{
+	struct drm_crtc *crtci;
+	struct drm_connector *connectori;
+	struct drm_framebuffer *fb1 = NULL;
+	bool single_framebuffer = true;
+	bool old_single_framebuffer = vbox->single_framebuffer;
+	u16 width = 0, height = 0;
+
+	/*
+	 * Are we using an X.Org-style single large frame-buffer for all crtcs?
+	 * If so then screen layout can be deduced from the crtc offsets.
+	 * Same fall-back if this is the fbdev frame-buffer.
+	 */
+	list_for_each_entry(crtci, &vbox->dev->mode_config.crtc_list, head) {
+		if (!fb1) {
+			fb1 = CRTC_FB(crtci);
+			if (to_vbox_framebuffer(fb1) == &vbox->fbdev->afb)
+				break;
+		} else if (CRTC_FB(crtci) && fb1 != CRTC_FB(crtci)) {
+			single_framebuffer = false;
+		}
+	}
+	if (single_framebuffer) {
+		list_for_each_entry(crtci, &vbox->dev->mode_config.crtc_list,
+				    head) {
+			if (to_vbox_crtc(crtci)->crtc_id != 0)
+				continue;
+
+			if (!CRTC_FB(crtci))
+				break;
+			vbox->single_framebuffer = true;
+			vbox->input_mapping_width = CRTC_FB(crtci)->width;
+			vbox->input_mapping_height = CRTC_FB(crtci)->height;
+			return old_single_framebuffer !=
+			       vbox->single_framebuffer;
+		}
+	}
+	/* Otherwise calculate the total span of all screens. */
+	list_for_each_entry(connectori, &vbox->dev->mode_config.connector_list,
+			    head) {
+		struct vbox_connector *vbox_connector =
+		    to_vbox_connector(connectori);
+		struct vbox_crtc *vbox_crtc = vbox_connector->vbox_crtc;
+
+		width = max_t(u16, width, vbox_crtc->x_hint +
+					  vbox_connector->mode_hint.width);
+		height = max_t(u16, height, vbox_crtc->y_hint +
+					    vbox_connector->mode_hint.height);
+	}
+
+	vbox->single_framebuffer = false;
+	vbox->input_mapping_width = width;
+	vbox->input_mapping_height = height;
+
+	return old_single_framebuffer != vbox->single_framebuffer;
+}
+
+static int vbox_crtc_set_base(struct drm_crtc *crtc,
+				 struct drm_framebuffer *old_fb,
+				 struct drm_framebuffer *new_fb,
+				 int x, int y)
+{
+	struct vbox_private *vbox = crtc->dev->dev_private;
+	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
+	struct drm_gem_object *obj;
+	struct vbox_framebuffer *vbox_fb;
+	struct vbox_bo *bo;
+	int ret;
+	u64 gpu_addr;
+
+	vbox_fb = to_vbox_framebuffer(new_fb);
+	obj = vbox_fb->obj;
+	bo = gem_to_vbox_bo(obj);
+
+	ret = vbox_bo_reserve(bo, false);
+	if (ret)
+		return ret;
+
+	ret = vbox_bo_pin(bo, VBOX_MEM_TYPE_VRAM, &gpu_addr);
+	vbox_bo_unreserve(bo);
+	if (ret)
+		return ret;
+
+	/* Unpin the previous fb.  Do this after the new one has been pinned rather
+	 * than before and re-pinning it on failure in case that fails too. */
+	if (old_fb) {
+		vbox_fb = to_vbox_framebuffer(old_fb);
+		obj = vbox_fb->obj;
+		bo = gem_to_vbox_bo(obj);
+		ret = vbox_bo_reserve(bo, false);
+		/* This should never fail, as no one else should be accessing it and we
+		 * should be running under the modeset locks. */
+		if (!ret) {
+			vbox_bo_unpin(bo);
+			vbox_bo_unreserve(bo);
+		}
+		else
+		{
+			DRM_ERROR("unable to lock buffer object: error %d\n", ret);
+		}
+	}
+
+	if (&vbox->fbdev->afb == vbox_fb)
+		vbox_fbdev_set_base(vbox, gpu_addr);
+
+	vbox_crtc->fb_offset = gpu_addr;
+	if (vbox_set_up_input_mapping(vbox)) {
+		struct drm_crtc *crtci;
+
+		list_for_each_entry(crtci, &vbox->dev->mode_config.crtc_list,
+				    head) {
+			vbox_do_modeset(crtci, &crtci->mode);
+		}
+	}
+
+	return 0;
+}
+
+static int vbox_crtc_mode_set(struct drm_crtc *crtc,
+			      struct drm_display_mode *mode,
+			      struct drm_display_mode *adjusted_mode,
+			      int x, int y, struct drm_framebuffer *old_fb)
+{
+	struct vbox_private *vbox = crtc->dev->dev_private;
+	int ret = vbox_crtc_set_base(crtc, old_fb, CRTC_FB(crtc), x, y);
+	if (ret)
+		return ret;
+	mutex_lock(&vbox->hw_mutex);
+	vbox_do_modeset(crtc, mode);
+	VBoxHGSMIUpdateInputMapping(vbox->guest_pool, 0, 0,
+				   vbox->input_mapping_width,
+				   vbox->input_mapping_height);
+	mutex_unlock(&vbox->hw_mutex);
+
+	return ret;
+}
+
+static int vbox_crtc_page_flip(struct drm_crtc *crtc,
+			       struct drm_framebuffer *fb,
+#if RTLNX_VER_MIN(4,12,0) || RTLNX_RHEL_MAJ_PREREQ(7,5)
+			       struct drm_pending_vblank_event *event,
+			       uint32_t page_flip_flags,
+			       struct drm_modeset_acquire_ctx *ctx)
+#elif RTLNX_VER_MIN(3,12,0) || RTLNX_RHEL_MAJ_PREREQ(7,0)
+			       struct drm_pending_vblank_event *event,
+			       uint32_t page_flip_flags)
+#else
+			       struct drm_pending_vblank_event *event)
+#endif
+{
+	struct vbox_private *vbox = crtc->dev->dev_private;
+	struct drm_device *drm = vbox->dev;
+	unsigned long flags;
+	int rc;
+
+	rc = vbox_crtc_set_base(crtc, CRTC_FB(crtc), fb, 0, 0);
+	if (rc)
+		return rc;
+
+	mutex_lock(&vbox->hw_mutex);
+	vbox_do_modeset(crtc, &crtc->mode);
+	mutex_unlock(&vbox->hw_mutex);
+
+	spin_lock_irqsave(&drm->event_lock, flags);
+
+	if (event)
+#if RTLNX_VER_MIN(3,19,0) || RTLNX_RHEL_MAJ_PREREQ(7,2)
+		drm_crtc_send_vblank_event(crtc, event);
+#else
+		drm_send_vblank_event(drm, -1, event);
+#endif
+
+	spin_unlock_irqrestore(&drm->event_lock, flags);
+
+	return 0;
+}
+
+static void vbox_crtc_disable(struct drm_crtc *crtc)
+{
+}
+
+static void vbox_crtc_prepare(struct drm_crtc *crtc)
+{
+}
+
+static void vbox_crtc_commit(struct drm_crtc *crtc)
+{
+}
+
+static const struct drm_crtc_helper_funcs vbox_crtc_helper_funcs = {
+	.dpms = vbox_crtc_dpms,
+	.mode_fixup = vbox_crtc_mode_fixup,
+	.mode_set = vbox_crtc_mode_set,
+	.disable = vbox_crtc_disable,
+	.prepare = vbox_crtc_prepare,
+	.commit = vbox_crtc_commit,
+};
+
+static void vbox_crtc_reset(struct drm_crtc *crtc)
+{
+}
+
+static void vbox_crtc_destroy(struct drm_crtc *crtc)
+{
+	drm_crtc_cleanup(crtc);
+	kfree(crtc);
+}
+
+static const struct drm_crtc_funcs vbox_crtc_funcs = {
+	.cursor_move = vbox_cursor_move,
+	.cursor_set2 = vbox_cursor_set2,
+	.reset = vbox_crtc_reset,
+	.set_config = drm_crtc_helper_set_config,
+	/* .gamma_set = vbox_crtc_gamma_set, */
+	.page_flip = vbox_crtc_page_flip,
+	.destroy = vbox_crtc_destroy,
+};
+
+static struct vbox_crtc *vbox_crtc_init(struct drm_device *dev, unsigned int i)
+{
+	struct vbox_crtc *vbox_crtc;
+
+	vbox_crtc = kzalloc(sizeof(*vbox_crtc), GFP_KERNEL);
+	if (!vbox_crtc)
+		return NULL;
+
+	vbox_crtc->crtc_id = i;
+
+	drm_crtc_init(dev, &vbox_crtc->base, &vbox_crtc_funcs);
+	drm_mode_crtc_set_gamma_size(&vbox_crtc->base, 256);
+	drm_crtc_helper_add(&vbox_crtc->base, &vbox_crtc_helper_funcs);
+
+	return vbox_crtc;
+}
+
+static void vbox_encoder_destroy(struct drm_encoder *encoder)
+{
+	drm_encoder_cleanup(encoder);
+	kfree(encoder);
+}
+
+#if RTLNX_VER_MAX(3,13,0) && !RTLNX_RHEL_MAJ_PREREQ(7,1)
+static struct drm_encoder *drm_encoder_find(struct drm_device *dev, u32 id)
+{
+	struct drm_mode_object *mo;
+
+	mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_ENCODER);
+	return mo ? obj_to_encoder(mo) : NULL;
+}
+#endif
+
+static struct drm_encoder *vbox_best_single_encoder(struct drm_connector
+						    *connector)
+{
+#if RTLNX_VER_MIN(5,5,0) || RTLNX_RHEL_MIN(8,3) || RTLNX_SUSE_MAJ_PREREQ(15,3)
+        struct drm_encoder *encoder;
+
+        /* There is only one encoder per connector */
+        drm_connector_for_each_possible_encoder(connector, encoder)
+            return encoder;
+#else /* < 5.5 || RHEL < 8.3 */
+	int enc_id = connector->encoder_ids[0];
+
+	/* pick the encoder ids */
+	if (enc_id)
+# if RTLNX_VER_MIN(4,15,0) || RTLNX_RHEL_MAJ_PREREQ(7,6) || (defined(CONFIG_SUSE_VERSION) && RTLNX_VER_MIN(4,12,0))
+		return drm_encoder_find(connector->dev, NULL, enc_id);
+# else
+		return drm_encoder_find(connector->dev, enc_id);
+# endif
+#endif /* < 5.5 || RHEL < 8.3 */
+	return NULL;
+}
+
+static const struct drm_encoder_funcs vbox_enc_funcs = {
+	.destroy = vbox_encoder_destroy,
+};
+
+static void vbox_encoder_dpms(struct drm_encoder *encoder, int mode)
+{
+}
+
+static bool vbox_mode_fixup(struct drm_encoder *encoder,
+			    const struct drm_display_mode *mode,
+			    struct drm_display_mode *adjusted_mode)
+{
+	return true;
+}
+
+static void vbox_encoder_mode_set(struct drm_encoder *encoder,
+				  struct drm_display_mode *mode,
+				  struct drm_display_mode *adjusted_mode)
+{
+}
+
+static void vbox_encoder_prepare(struct drm_encoder *encoder)
+{
+}
+
+static void vbox_encoder_commit(struct drm_encoder *encoder)
+{
+}
+
+static const struct drm_encoder_helper_funcs vbox_enc_helper_funcs = {
+	.dpms = vbox_encoder_dpms,
+	.mode_fixup = vbox_mode_fixup,
+	.prepare = vbox_encoder_prepare,
+	.commit = vbox_encoder_commit,
+	.mode_set = vbox_encoder_mode_set,
+};
+
+static struct drm_encoder *vbox_encoder_init(struct drm_device *dev,
+					     unsigned int i)
+{
+	struct vbox_encoder *vbox_encoder;
+
+	vbox_encoder = kzalloc(sizeof(*vbox_encoder), GFP_KERNEL);
+	if (!vbox_encoder)
+		return NULL;
+
+	drm_encoder_init(dev, &vbox_encoder->base, &vbox_enc_funcs,
+#if RTLNX_VER_MIN(4,5,0) || RTLNX_RHEL_MAJ_PREREQ(7,3)
+			 DRM_MODE_ENCODER_DAC, NULL);
+#else
+			 DRM_MODE_ENCODER_DAC);
+#endif
+	drm_encoder_helper_add(&vbox_encoder->base, &vbox_enc_helper_funcs);
+
+	vbox_encoder->base.possible_crtcs = 1 << i;
+	return &vbox_encoder->base;
+}
+
+/**
+ * Generate EDID data with a mode-unique serial number for the virtual
+ *  monitor to try to persuade Unity that different modes correspond to
+ *  different monitors and it should not try to force the same resolution on
+ *  them.
+ */
+static void vbox_set_edid(struct drm_connector *connector, int width,
+			  int height)
+{
+	enum { EDID_SIZE = 128 };
+	unsigned char edid[EDID_SIZE] = {
+		0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00,	/* header */
+		0x58, 0x58,	/* manufacturer (VBX) */
+		0x00, 0x00,	/* product code */
+		0x00, 0x00, 0x00, 0x00,	/* serial number goes here */
+		0x01,		/* week of manufacture */
+		0x00,		/* year of manufacture */
+		0x01, 0x03,	/* EDID version */
+		0x80,		/* capabilities - digital */
+		0x00,		/* horiz. res in cm, zero for projectors */
+		0x00,		/* vert. res in cm */
+		0x78,		/* display gamma (120 == 2.2). */
+		0xEE,		/* features (standby, suspend, off, RGB, std */
+				/* colour space, preferred timing mode) */
+		0xEE, 0x91, 0xA3, 0x54, 0x4C, 0x99, 0x26, 0x0F, 0x50, 0x54,
+		/* chromaticity for standard colour space. */
+		0x00, 0x00, 0x00,	/* no default timings */
+		0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+		    0x01, 0x01,
+		0x01, 0x01, 0x01, 0x01,	/* no standard timings */
+		0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x00, 0x02, 0x02,
+		    0x02, 0x02,
+		/* descriptor block 1 goes below */
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		/* descriptor block 2, monitor ranges */
+		0x00, 0x00, 0x00, 0xFD, 0x00,
+		0x00, 0xC8, 0x00, 0xC8, 0x64, 0x00, 0x0A, 0x20, 0x20, 0x20,
+		    0x20, 0x20,
+		/* 0-200Hz vertical, 0-200KHz horizontal, 1000MHz pixel clock */
+		0x20,
+		/* descriptor block 3, monitor name */
+		0x00, 0x00, 0x00, 0xFC, 0x00,
+		'V', 'B', 'O', 'X', ' ', 'm', 'o', 'n', 'i', 't', 'o', 'r',
+		'\n',
+		/* descriptor block 4: dummy data */
+		0x00, 0x00, 0x00, 0x10, 0x00,
+		0x0A, 0x20, 0x20, 0x20, 0x20, 0x20,
+		0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+		0x20,
+		0x00,		/* number of extensions */
+		0x00		/* checksum goes here */
+	};
+	int clock = (width + 6) * (height + 6) * 60 / 10000;
+	unsigned int i, sum = 0;
+
+	edid[12] = width & 0xff;
+	edid[13] = width >> 8;
+	edid[14] = height & 0xff;
+	edid[15] = height >> 8;
+	edid[54] = clock & 0xff;
+	edid[55] = clock >> 8;
+	edid[56] = width & 0xff;
+	edid[58] = (width >> 4) & 0xf0;
+	edid[59] = height & 0xff;
+	edid[61] = (height >> 4) & 0xf0;
+	for (i = 0; i < EDID_SIZE - 1; ++i)
+		sum += edid[i];
+	edid[EDID_SIZE - 1] = (0x100 - (sum & 0xFF)) & 0xFF;
+#if RTLNX_VER_MIN(4,19,0) || RTLNX_RHEL_MAJ_PREREQ(7,7) || RTLNX_RHEL_MAJ_PREREQ(8,1) || RTLNX_SUSE_MAJ_PREREQ(15,1) || RTLNX_SUSE_MAJ_PREREQ(12,5)
+	drm_connector_update_edid_property(connector, (struct edid *)edid);
+#else
+	drm_mode_connector_update_edid_property(connector, (struct edid *)edid);
+#endif
+}
+
+static int vbox_get_modes(struct drm_connector *connector)
+{
+	struct vbox_connector *vbox_connector = NULL;
+	struct drm_display_mode *mode = NULL;
+	struct vbox_private *vbox = NULL;
+	unsigned int num_modes = 0;
+	int preferred_width, preferred_height;
+
+	vbox_connector = to_vbox_connector(connector);
+	vbox = connector->dev->dev_private;
+	/*
+	 * Heuristic: we do not want to tell the host that we support dynamic
+	 * resizing unless we feel confident that the user space client using
+	 * the video driver can handle hot-plug events.  So the first time modes
+	 * are queried after a "master" switch we tell the host that we do not,
+	 * and immediately after we send the client a hot-plug notification as
+	 * a test to see if they will respond and query again.
+	 * That is also the reason why capabilities are reported to the host at
+	 * this place in the code rather than elsewhere.
+	 * We need to report the flags location before reporting the IRQ
+	 * capability.
+	 */
+	VBoxHGSMIReportFlagsLocation(vbox->guest_pool, GUEST_HEAP_OFFSET(vbox) +
+				    HOST_FLAGS_OFFSET);
+	if (vbox_connector->vbox_crtc->crtc_id == 0)
+		vbox_report_caps(vbox);
+	if (!vbox->initial_mode_queried) {
+		if (vbox_connector->vbox_crtc->crtc_id == 0) {
+			vbox->initial_mode_queried = true;
+			vbox_report_hotplug(vbox);
+		}
+		return drm_add_modes_noedid(connector, 800, 600);
+	}
+	/* Also assume that a client which supports hot-plugging also knows
+	 * how to update the screen in a way we can use, the only known
+	 * relevent client which cannot is Plymouth in Ubuntu 14.04. */
+	vbox->need_refresh_timer = false;
+	num_modes = drm_add_modes_noedid(connector, 2560, 1600);
+	preferred_width = vbox_connector->mode_hint.width ?
+			  vbox_connector->mode_hint.width : 1024;
+	preferred_height = vbox_connector->mode_hint.height ?
+			   vbox_connector->mode_hint.height : 768;
+	mode = drm_cvt_mode(connector->dev, preferred_width, preferred_height,
+			    60, false, false, false);
+	if (mode) {
+		mode->type |= DRM_MODE_TYPE_PREFERRED;
+		drm_mode_probed_add(connector, mode);
+		++num_modes;
+	}
+	vbox_set_edid(connector, preferred_width, preferred_height);
+
+#if RTLNX_VER_MIN(3,19,0) || RTLNX_RHEL_MAJ_PREREQ(7,2)
+	if (vbox_connector->vbox_crtc->x_hint != -1)
+		drm_object_property_set_value(&connector->base,
+			vbox->dev->mode_config.suggested_x_property,
+			vbox_connector->vbox_crtc->x_hint);
+	else
+		drm_object_property_set_value(&connector->base,
+			vbox->dev->mode_config.suggested_x_property, 0);
+
+	if (vbox_connector->vbox_crtc->y_hint != -1)
+		drm_object_property_set_value(&connector->base,
+			vbox->dev->mode_config.suggested_y_property,
+			vbox_connector->vbox_crtc->y_hint);
+	else
+		drm_object_property_set_value(&connector->base,
+			vbox->dev->mode_config.suggested_y_property, 0);
+#endif
+
+	return num_modes;
+}
+
+#if RTLNX_VER_MAX(3,14,0) && !RTLNX_RHEL_MAJ_PREREQ(7,1)
+static int vbox_mode_valid(struct drm_connector *connector,
+#else
+static enum drm_mode_status vbox_mode_valid(struct drm_connector *connector,
+#endif
+			   struct drm_display_mode *mode)
+{
+	return MODE_OK;
+}
+
+static void vbox_connector_destroy(struct drm_connector *connector)
+{
+#if RTLNX_VER_MAX(3,17,0) && !RTLNX_RHEL_MAJ_PREREQ(7,2)
+	drm_sysfs_connector_remove(connector);
+#else
+	drm_connector_unregister(connector);
+#endif
+	drm_connector_cleanup(connector);
+	kfree(connector);
+}
+
+static enum drm_connector_status
+vbox_connector_detect(struct drm_connector *connector, bool force)
+{
+	struct vbox_connector *vbox_connector;
+
+	vbox_connector = to_vbox_connector(connector);
+
+	return vbox_connector->mode_hint.disconnected ?
+	    connector_status_disconnected : connector_status_connected;
+}
+
+static int vbox_fill_modes(struct drm_connector *connector, u32 max_x,
+			   u32 max_y)
+{
+	struct vbox_connector *vbox_connector;
+	struct drm_device *dev;
+	struct drm_display_mode *mode, *iterator;
+
+	vbox_connector = to_vbox_connector(connector);
+	dev = vbox_connector->base.dev;
+	list_for_each_entry_safe(mode, iterator, &connector->modes, head) {
+		list_del(&mode->head);
+		drm_mode_destroy(dev, mode);
+	}
+
+	return drm_helper_probe_single_connector_modes(connector, max_x, max_y);
+}
+
+static const struct drm_connector_helper_funcs vbox_connector_helper_funcs = {
+	.mode_valid = vbox_mode_valid,
+	.get_modes = vbox_get_modes,
+	.best_encoder = vbox_best_single_encoder,
+};
+
+static const struct drm_connector_funcs vbox_connector_funcs = {
+	.dpms = drm_helper_connector_dpms,
+	.detect = vbox_connector_detect,
+	.fill_modes = vbox_fill_modes,
+	.destroy = vbox_connector_destroy,
+};
+
+static int vbox_connector_init(struct drm_device *dev,
+			       struct vbox_crtc *vbox_crtc,
+			       struct drm_encoder *encoder)
+{
+	struct vbox_connector *vbox_connector;
+	struct drm_connector *connector;
+
+	vbox_connector = kzalloc(sizeof(*vbox_connector), GFP_KERNEL);
+	if (!vbox_connector)
+		return -ENOMEM;
+
+	connector = &vbox_connector->base;
+	vbox_connector->vbox_crtc = vbox_crtc;
+
+	drm_connector_init(dev, connector, &vbox_connector_funcs,
+			   DRM_MODE_CONNECTOR_VGA);
+	drm_connector_helper_add(connector, &vbox_connector_helper_funcs);
+
+	connector->interlace_allowed = 0;
+	connector->doublescan_allowed = 0;
+
+#if RTLNX_VER_MIN(3,19,0) || RTLNX_RHEL_MAJ_PREREQ(7,2)
+	drm_mode_create_suggested_offset_properties(dev);
+	drm_object_attach_property(&connector->base,
+				   dev->mode_config.suggested_x_property, 0);
+	drm_object_attach_property(&connector->base,
+				   dev->mode_config.suggested_y_property, 0);
+#endif
+#if RTLNX_VER_MAX(3,17,0) && !RTLNX_RHEL_MAJ_PREREQ(7,2)
+	drm_sysfs_connector_add(connector);
+#else
+	drm_connector_register(connector);
+#endif
+
+#if RTLNX_VER_MIN(4,19,0) || RTLNX_RHEL_MAJ_PREREQ(7,7) || RTLNX_RHEL_MAJ_PREREQ(8,1) || RTLNX_SUSE_MAJ_PREREQ(15,1) || RTLNX_SUSE_MAJ_PREREQ(12,5)
+	drm_connector_attach_encoder(connector, encoder);
+#else
+	drm_mode_connector_attach_encoder(connector, encoder);
+#endif
+
+	return 0;
+}
+
+int vbox_mode_init(struct drm_device *dev)
+{
+	struct vbox_private *vbox = dev->dev_private;
+	struct drm_encoder *encoder;
+	struct vbox_crtc *vbox_crtc;
+	unsigned int i;
+	int ret;
+
+	/* vbox_cursor_init(dev); */
+	for (i = 0; i < vbox->num_crtcs; ++i) {
+		vbox_crtc = vbox_crtc_init(dev, i);
+		if (!vbox_crtc)
+			return -ENOMEM;
+		encoder = vbox_encoder_init(dev, i);
+		if (!encoder)
+			return -ENOMEM;
+		ret = vbox_connector_init(dev, vbox_crtc, encoder);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+void vbox_mode_fini(struct drm_device *dev)
+{
+	/* vbox_cursor_fini(dev); */
+}
+
+/**
+ * Copy the ARGB image and generate the mask, which is needed in case the host
+ * does not support ARGB cursors.  The mask is a 1BPP bitmap with the bit set
+ * if the corresponding alpha value in the ARGB image is greater than 0xF0.
+ */
+static void copy_cursor_image(u8 *src, u8 *dst, u32 width, u32 height,
+			      size_t mask_size)
+{
+	size_t line_size = (width + 7) / 8;
+	u32 i, j;
+
+	memcpy(dst + mask_size, src, width * height * 4);
+	for (i = 0; i < height; ++i)
+		for (j = 0; j < width; ++j)
+			if (((u32 *)src)[i * width + j] > 0xf0000000)
+				dst[i * line_size + j / 8] |= (0x80 >> (j % 8));
+}
+
+static int vbox_cursor_set2(struct drm_crtc *crtc, struct drm_file *file_priv,
+			    u32 handle, u32 width, u32 height,
+			    s32 hot_x, s32 hot_y)
+{
+	struct vbox_private *vbox = crtc->dev->dev_private;
+	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
+	struct ttm_bo_kmap_obj uobj_map;
+	size_t data_size, mask_size;
+	struct drm_gem_object *obj;
+	u32 flags, caps = 0;
+	struct vbox_bo *bo;
+	bool src_isiomem;
+	u8 *dst = NULL;
+	u8 *src;
+	int ret;
+
+	if (!handle) {
+		bool cursor_enabled = false;
+		struct drm_crtc *crtci;
+
+		/* Hide cursor. */
+		vbox_crtc->cursor_enabled = false;
+		list_for_each_entry(crtci, &vbox->dev->mode_config.crtc_list,
+				    head) {
+			if (to_vbox_crtc(crtci)->cursor_enabled)
+				cursor_enabled = true;
+			}
+
+		if (!cursor_enabled)
+			VBoxHGSMIUpdatePointerShape(vbox->guest_pool, 0, 0, 0,
+						   0, 0, NULL, 0);
+		return 0;
+	}
+
+	vbox_crtc->cursor_enabled = true;
+
+	if (width > VBOX_MAX_CURSOR_WIDTH || height > VBOX_MAX_CURSOR_HEIGHT ||
+	    width == 0 || height == 0)
+		return -EINVAL;
+	ret = VBoxQueryConfHGSMI(vbox->guest_pool,
+				VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &caps);
+	if (ret)
+		return ret == VERR_NO_MEMORY ? -ENOMEM : -EINVAL;
+
+	if (!(caps & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)) {
+		/*
+		 * -EINVAL means cursor_set2() not supported, -EAGAIN means
+		 * retry at once.
+		 */
+		return -EBUSY;
+	}
+
+#if RTLNX_VER_MIN(4,7,0) || RTLNX_RHEL_MAJ_PREREQ(7,4)
+	obj = drm_gem_object_lookup(file_priv, handle);
+#else
+	obj = drm_gem_object_lookup(crtc->dev, file_priv, handle);
+#endif
+	if (!obj) {
+		DRM_ERROR("Cannot find cursor object %x for crtc\n", handle);
+		return -ENOENT;
+	}
+
+	bo = gem_to_vbox_bo(obj);
+	ret = vbox_bo_reserve(bo, false);
+	if (ret)
+		goto out_unref_obj;
+
+	/*
+	 * The mask must be calculated based on the alpha
+	 * channel, one bit per ARGB word, and must be 32-bit
+	 * padded.
+	 */
+	mask_size = ((width + 7) / 8 * height + 3) & ~3;
+	data_size = width * height * 4 + mask_size;
+	vbox->cursor_hot_x = hot_x;
+	vbox->cursor_hot_y = hot_y;
+	vbox->cursor_width = width;
+	vbox->cursor_height = height;
+	vbox->cursor_data_size = data_size;
+	dst = vbox->cursor_data;
+
+#if RTLNX_VER_MIN(6,4,0)
+	/* Make sure bo is in SYSTEM (main) memory, so we can access it directly. */
+	ret = vbox_bo_pin(bo, VBOX_MEM_TYPE_SYSTEM, NULL);
+	if (ret)
+	{
+		DRM_ERROR("cannot pin bo to main memory\n");
+		goto out_bo_unpin;
+	}
+#endif
+
+#if RTLNX_VER_MIN(5,14,0) || RTLNX_RHEL_RANGE(8,6, 8,99)
+	ret = ttm_bo_kmap(&bo->bo, 0, VBOX_BO_RESOURCE_NUM_PAGES(bo->bo.resource), &uobj_map);
+#elif RTLNX_VER_MIN(5,12,0) || RTLNX_RHEL_MAJ_PREREQ(8,5)
+	ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.mem.num_pages, &uobj_map);
+#else
+	ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &uobj_map);
+#endif
+	if (ret) {
+		vbox->cursor_data_size = 0;
+		goto out_unreserve_bo;
+	}
+
+	src = ttm_kmap_obj_virtual(&uobj_map, &src_isiomem);
+	if (src_isiomem) {
+		DRM_ERROR("src cursor bo not in main memory\n");
+		ret = -EIO;
+		goto out_unmap_bo;
+	}
+
+	copy_cursor_image(src, dst, width, height, mask_size);
+
+	flags = VBOX_MOUSE_POINTER_VISIBLE | VBOX_MOUSE_POINTER_SHAPE |
+		VBOX_MOUSE_POINTER_ALPHA;
+	ret = VBoxHGSMIUpdatePointerShape(vbox->guest_pool, flags,
+					 vbox->cursor_hot_x, vbox->cursor_hot_y,
+					 width, height, dst, data_size);
+	ret = ret == VINF_SUCCESS ? 0 : ret == VERR_NO_MEMORY ? -ENOMEM :
+		ret == VERR_NOT_SUPPORTED ? -EBUSY : -EINVAL;
+
+out_unmap_bo:
+	ttm_bo_kunmap(&uobj_map);
+#if RTLNX_VER_MIN(6,4,0)
+out_bo_unpin:
+	vbox_bo_unpin(bo);
+#endif
+out_unreserve_bo:
+	vbox_bo_unreserve(bo);
+out_unref_obj:
+#if RTLNX_VER_MIN(5,9,0) || RTLNX_RHEL_MIN(8,4) || RTLNX_SUSE_MAJ_PREREQ(15,3)
+	drm_gem_object_put(obj);
+#else
+	drm_gem_object_put_unlocked(obj);
+#endif
+
+	return ret;
+}
+
+static int vbox_cursor_move(struct drm_crtc *crtc, int x, int y)
+{
+	struct vbox_private *vbox = crtc->dev->dev_private;
+	s32 crtc_x =
+	    vbox->single_framebuffer ? crtc->x : to_vbox_crtc(crtc)->x_hint;
+	s32 crtc_y =
+	    vbox->single_framebuffer ? crtc->y : to_vbox_crtc(crtc)->y_hint;
+	int ret;
+
+	x += vbox->cursor_hot_x;
+	y += vbox->cursor_hot_y;
+	if (x + crtc_x < 0 || y + crtc_y < 0 ||
+		x + crtc_x >= vbox->input_mapping_width ||
+		y + crtc_y >= vbox->input_mapping_width ||
+		vbox->cursor_data_size == 0)
+		return 0;
+	ret = VBoxHGSMICursorPosition(vbox->guest_pool, true, x + crtc_x,
+					 y + crtc_y, NULL, NULL);
+	return ret == VINF_SUCCESS ? 0 : ret == VERR_NO_MEMORY ? -ENOMEM : ret ==
+		VERR_NOT_SUPPORTED ? -EBUSY : -EINVAL;
+}