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_drv.h>
  13#include <drm/drm_probe_helper.h>
  14
  15#include <video/videomode.h>
  16
  17#include "xen_drm_front.h"
  18#include "xen_drm_front_conn.h"
  19#include "xen_drm_front_kms.h"
  20
  21static struct xen_drm_front_drm_pipeline *
  22to_xen_drm_pipeline(struct drm_connector *connector)
  23{
  24        return container_of(connector, struct xen_drm_front_drm_pipeline, conn);
  25}
  26
  27static const u32 plane_formats[] = {
  28        DRM_FORMAT_RGB565,
  29        DRM_FORMAT_RGB888,
  30        DRM_FORMAT_XRGB8888,
  31        DRM_FORMAT_ARGB8888,
  32        DRM_FORMAT_XRGB4444,
  33        DRM_FORMAT_ARGB4444,
  34        DRM_FORMAT_XRGB1555,
  35        DRM_FORMAT_ARGB1555,
  36};
  37
  38const u32 *xen_drm_front_conn_get_formats(int *format_count)
  39{
  40        *format_count = ARRAY_SIZE(plane_formats);
  41        return plane_formats;
  42}
  43
  44static int connector_detect(struct drm_connector *connector,
  45                            struct drm_modeset_acquire_ctx *ctx,
  46                            bool force)
  47{
  48        struct xen_drm_front_drm_pipeline *pipeline =
  49                        to_xen_drm_pipeline(connector);
  50
  51        if (drm_dev_is_unplugged(connector->dev))
  52                pipeline->conn_connected = false;
  53
  54        return pipeline->conn_connected ? connector_status_connected :
  55                        connector_status_disconnected;
  56}
  57
  58#define XEN_DRM_CRTC_VREFRESH_HZ        60
  59
  60static int connector_get_modes(struct drm_connector *connector)
  61{
  62        struct xen_drm_front_drm_pipeline *pipeline =
  63                        to_xen_drm_pipeline(connector);
  64        struct drm_display_mode *mode;
  65        struct videomode videomode;
  66        int width, height;
  67
  68        mode = drm_mode_create(connector->dev);
  69        if (!mode)
  70                return 0;
  71
  72        memset(&videomode, 0, sizeof(videomode));
  73        videomode.hactive = pipeline->width;
  74        videomode.vactive = pipeline->height;
  75        width = videomode.hactive + videomode.hfront_porch +
  76                        videomode.hback_porch + videomode.hsync_len;
  77        height = videomode.vactive + videomode.vfront_porch +
  78                        videomode.vback_porch + videomode.vsync_len;
  79        videomode.pixelclock = width * height * XEN_DRM_CRTC_VREFRESH_HZ;
  80        mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
  81
  82        drm_display_mode_from_videomode(&videomode, mode);
  83        drm_mode_probed_add(connector, mode);
  84        return 1;
  85}
  86
  87static const struct drm_connector_helper_funcs connector_helper_funcs = {
  88        .get_modes = connector_get_modes,
  89        .detect_ctx = connector_detect,
  90};
  91
  92static const struct drm_connector_funcs connector_funcs = {
  93        .fill_modes = drm_helper_probe_single_connector_modes,
  94        .destroy = drm_connector_cleanup,
  95        .reset = drm_atomic_helper_connector_reset,
  96        .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
  97        .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
  98};
  99
 100int xen_drm_front_conn_init(struct xen_drm_front_drm_info *drm_info,
 101                            struct drm_connector *connector)
 102{
 103        struct xen_drm_front_drm_pipeline *pipeline =
 104                        to_xen_drm_pipeline(connector);
 105
 106        drm_connector_helper_add(connector, &connector_helper_funcs);
 107
 108        pipeline->conn_connected = true;
 109
 110        connector->polled = DRM_CONNECTOR_POLL_CONNECT |
 111                        DRM_CONNECTOR_POLL_DISCONNECT;
 112
 113        return drm_connector_init(drm_info->drm_dev, connector,
 114                                  &connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
 115}
 116