LXR linux/drivers/gpu/drm/xen/xen_drm_front

   1// SPDX-License-Identifier: GPL-2.0 OR MIT
   2
   3/*
   4 *  Xen para-virtual DRM device
   5 *
   6 * Copyright (C) 2016-2018 EPAM Systems Inc.
   7 *
   8 * Author: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
   9 */
  10
  11#include <drm/drm_atomic_helper.h>
  12#include <drm/drm_probe_helper.h>
  13
  14#include <video/videomode.h>
  15
  16#include "xen_drm_front.h"
  17#include "xen_drm_front_conn.h"
  18#include "xen_drm_front_kms.h"
  19
  20static struct xen_drm_front_drm_pipeline *
  21to_xen_drm_pipeline(struct drm_connector *connector)
  22{
  23        return container_of(connector, struct xen_drm_front_drm_pipeline, conn);
  24}
  25
  26static const u32 plane_formats[] = {
  27        DRM_FORMAT_RGB565,
  28        DRM_FORMAT_RGB888,
  29        DRM_FORMAT_XRGB8888,
  30        DRM_FORMAT_ARGB8888,
  31        DRM_FORMAT_XRGB4444,
  32        DRM_FORMAT_ARGB4444,
  33        DRM_FORMAT_XRGB1555,
  34        DRM_FORMAT_ARGB1555,
  35};
  36
  37const u32 *xen_drm_front_conn_get_formats(int *format_count)
  38{
  39        *format_count = ARRAY_SIZE(plane_formats);
  40        return plane_formats;
  41}
  42
  43static int connector_detect(struct drm_connector *connector,
  44                            struct drm_modeset_acquire_ctx *ctx,
  45                            bool force)
  46{
  47        struct xen_drm_front_drm_pipeline *pipeline =
  48                        to_xen_drm_pipeline(connector);
  49
  50        if (drm_dev_is_unplugged(connector->dev))
  51                pipeline->conn_connected = false;
  52
  53        return pipeline->conn_connected ? connector_status_connected :
  54                        connector_status_disconnected;
  55}
  56
  57#define XEN_DRM_CRTC_VREFRESH_HZ        60
  58
  59static int connector_get_modes(struct drm_connector *connector)
  60{
  61        struct xen_drm_front_drm_pipeline *pipeline =
  62                        to_xen_drm_pipeline(connector);
  63        struct drm_display_mode *mode;
  64        struct videomode videomode;
  65        int width, height;
  66
  67        mode = drm_mode_create(connector->dev);
  68        if (!mode)
  69                return 0;
  70
  71        memset(&videomode, 0, sizeof(videomode));
  72        videomode.hactive = pipeline->width;
  73        videomode.vactive = pipeline->height;
  74        width = videomode.hactive + videomode.hfront_porch +
  75                        videomode.hback_porch + videomode.hsync_len;
  76        height = videomode.vactive + videomode.vfront_porch +
  77                        videomode.vback_porch + videomode.vsync_len;
  78        videomode.pixelclock = width * height * XEN_DRM_CRTC_VREFRESH_HZ;
  79        mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
  80
  81        drm_display_mode_from_videomode(&videomode, mode);
  82        drm_mode_probed_add(connector, mode);
  83        return 1;
  84}
  85
  86static const struct drm_connector_helper_funcs connector_helper_funcs = {
  87        .get_modes = connector_get_modes,
  88        .detect_ctx = connector_detect,
  89};
  90
  91static const struct drm_connector_funcs connector_funcs = {
  92        .fill_modes = drm_helper_probe_single_connector_modes,
  93        .destroy = drm_connector_cleanup,
  94        .reset = drm_atomic_helper_connector_reset,
  95        .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
  96        .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
  97};
  98
  99int xen_drm_front_conn_init(struct xen_drm_front_drm_info *drm_info,
 100                            struct drm_connector *connector)
 101{
 102        struct xen_drm_front_drm_pipeline *pipeline =
 103                        to_xen_drm_pipeline(connector);
 104
 105        drm_connector_helper_add(connector, &connector_helper_funcs);
 106
 107        pipeline->conn_connected = true;
 108
 109        connector->polled = DRM_CONNECTOR_POLL_CONNECT |
 110                        DRM_CONNECTOR_POLL_DISCONNECT;
 111
 112        return drm_connector_init(drm_info->drm_dev, connector,
 113                                  &connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
 114}
 115