drivers/gpu/drm/vboxvideo/modesetting.c

   1 // SPDX-License-Identifier: MIT
   2 /* Copyright (C) 2006-2017 Oracle Corporation */
   3
   4 #include <linux/vbox_err.h>
   5 #include "vbox_drv.h"
   6 #include "vboxvideo_guest.h"
   7 #include "vboxvideo_vbe.h"
   8 #include "hgsmi_channels.h"
   9
  10 /**
  11  * Set a video mode via an HGSMI request.  The views must have been
  12  * initialised first using @a VBoxHGSMISendViewInfo and if the mode is being
  13  * set on the first display then it must be set first using registers.
  14  * @ctx:           The context containing the heap to use.
  15  * @display:       The screen number.
  16  * @origin_x:      The horizontal displacement relative to the first scrn.
  17  * @origin_y:      The vertical displacement relative to the first screen.
  18  * @start_offset:  The offset of the visible area of the framebuffer
  19  *                 relative to the framebuffer start.
  20  * @pitch:         The offset in bytes between the starts of two adjecent
  21  *                 scan lines in video RAM.
  22  * @width:         The mode width.
  23  * @height:        The mode height.
  24  * @bpp:           The colour depth of the mode.
  25  * @flags:         Flags.
  26  */
  27 void hgsmi_process_display_info(struct gen_pool *ctx, u32 display,
  28                                 s32 origin_x, s32 origin_y, u32 start_offset,
  29                                 u32 pitch, u32 width, u32 height,
  30                                 u16 bpp, u16 flags)
  31 {
  32         struct vbva_infoscreen *p;
  33
  34         p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA,
  35                                VBVA_INFO_SCREEN);
  36         if (!p)
  37                 return;
  38
  39         p->view_index = display;
  40         p->origin_x = origin_x;
  41         p->origin_y = origin_y;
  42         p->start_offset = start_offset;
  43         p->line_size = pitch;
  44         p->width = width;
  45         p->height = height;
  46         p->bits_per_pixel = bpp;
  47         p->flags = flags;
  48
  49         hgsmi_buffer_submit(ctx, p);
  50         hgsmi_buffer_free(ctx, p);
  51 }
  52
  53 /**
  54  * Report the rectangle relative to which absolute pointer events should be
  55  * expressed.  This information remains valid until the next VBVA resize event
  56  * for any screen, at which time it is reset to the bounding rectangle of all
  57  * virtual screens.
  58  * Return: 0 or negative errno value.
  59  * @ctx:       The context containing the heap to use.
  60  * @origin_x:  Upper left X co-ordinate relative to the first screen.
  61  * @origin_y:  Upper left Y co-ordinate relative to the first screen.
  62  * @width:     Rectangle width.
  63  * @height:    Rectangle height.
  64  */
  65 int hgsmi_update_input_mapping(struct gen_pool *ctx, s32 origin_x, s32 origin_y,
  66                                u32 width, u32 height)
  67 {
  68         struct vbva_report_input_mapping *p;
  69
  70         p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA,
  71                                VBVA_REPORT_INPUT_MAPPING);
  72         if (!p)
  73                 return -ENOMEM;
  74
  75         p->x = origin_x;
  76         p->y = origin_y;
  77         p->cx = width;
  78         p->cy = height;
  79
  80         hgsmi_buffer_submit(ctx, p);
  81         hgsmi_buffer_free(ctx, p);
  82
  83         return 0;
  84 }
  85
  86 /**
  87  * Get most recent video mode hints.
  88  * Return: 0 or negative errno value.
  89  * @ctx:      The context containing the heap to use.
  90  * @screens:  The number of screens to query hints for, starting at 0.
  91  * @hints:    Array of vbva_modehint structures for receiving the hints.
  92  */
  93 int hgsmi_get_mode_hints(struct gen_pool *ctx, unsigned int screens,
  94                          struct vbva_modehint *hints)
  95 {
  96         struct vbva_query_mode_hints *p;
  97         size_t size;
  98
  99         if (WARN_ON(!hints))
 100                 return -EINVAL;
 101
 102         size = screens * sizeof(struct vbva_modehint);
 103         p = hgsmi_buffer_alloc(ctx, sizeof(*p) + size, HGSMI_CH_VBVA,
 104                                VBVA_QUERY_MODE_HINTS);
 105         if (!p)
 106                 return -ENOMEM;
 107
 108         p->hints_queried_count = screens;
 109         p->hint_structure_guest_size = sizeof(struct vbva_modehint);
 110         p->rc = VERR_NOT_SUPPORTED;
 111
 112         hgsmi_buffer_submit(ctx, p);
 113
 114         if (p->rc < 0) {
 115                 hgsmi_buffer_free(ctx, p);
 116                 return -EIO;
 117         }
 118
 119         memcpy(hints, ((u8 *)p) + sizeof(struct vbva_query_mode_hints), size);
 120         hgsmi_buffer_free(ctx, p);
 121
 122         return 0;
 123 }