linux/drivers/gpu/drm/vboxvideo/modesetting.c

// SPDX-License-Identifier: MIT
/* Copyright (C) 2006-2017 Oracle Corporation */

#include <linux/vbox_err.h>
#include "vbox_drv.h"
#include "vboxvideo_guest.h"
#include "vboxvideo_vbe.h"
#include "hgsmi_channels.h"

/**
 * hgsmi_process_display_info - Set a video mode via an HGSMI request.
 *                              The views must have been initialised first
 *                              using @a VBoxHGSMISendViewInfo and if the mode
 *                              is being set on the first display then it must
 *                              be set first using registers.
 * @ctx:           The context containing the heap to use.
 * @display:       The screen number.
 * @origin_x:      The horizontal displacement relative to the first scrn.
 * @origin_y:      The vertical displacement relative to the first screen.
 * @start_offset:  The offset of the visible area of the framebuffer
 *                 relative to the framebuffer start.
 * @pitch:         The offset in bytes between the starts of two adjecent
 *                 scan lines in video RAM.
 * @width:         The mode width.
 * @height:        The mode height.
 * @bpp:           The colour depth of the mode.
 * @flags:         Flags.
 */
void hgsmi_process_display_info(struct gen_pool *ctx, u32 display,
				s32 origin_x, s32 origin_y, u32 start_offset,
				u32 pitch, u32 width, u32 height,
				u16 bpp, u16 flags)
{ … }

/**
 * hgsmi_update_input_mapping - Report the rectangle relative to which absolute
 *                              pointer events should be expressed.  This
 *                              information remains valid until the next VBVA
 *                              resize event for any screen, at which time it is
 *                              reset to the bounding rectangle of all virtual
 *                              screens.
 * Return: 0 or negative errno value.
 * @ctx:       The context containing the heap to use.
 * @origin_x:  Upper left X co-ordinate relative to the first screen.
 * @origin_y:  Upper left Y co-ordinate relative to the first screen.
 * @width:     Rectangle width.
 * @height:    Rectangle height.
 */
int hgsmi_update_input_mapping(struct gen_pool *ctx, s32 origin_x, s32 origin_y,
			       u32 width, u32 height)
{ … }

/**
 * hgsmi_get_mode_hints - Get most recent video mode hints.
 * Return: 0 or negative errno value.
 * @ctx:      The context containing the heap to use.
 * @screens:  The number of screens to query hints for, starting at 0.
 * @hints:    Array of vbva_modehint structures for receiving the hints.
 */
int hgsmi_get_mode_hints(struct gen_pool *ctx, unsigned int screens,
			 struct vbva_modehint *hints)
{ … }