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        DRM_FORMAT_YUYV,
  37};
  38
  39const u32 *xen_drm_front_conn_get_formats(int *format_count)
  40{
  41        *format_count = ARRAY_SIZE(plane_formats);
  42        return plane_formats;
  43}
  44
  45static int connector_detect(struct drm_connector *connector,
  46                            struct drm_modeset_acquire_ctx *ctx,
  47                            bool force)
  48{
  49        struct xen_drm_front_drm_pipeline *pipeline =
  50                        to_xen_drm_pipeline(connector);
  51
  52        if (drm_dev_is_unplugged(connector->dev))
  53                pipeline->conn_connected = false;
  54
  55        return pipeline->conn_connected ? connector_status_connected :
  56                        connector_status_disconnected;
  57}
  58
  59#define XEN_DRM_CRTC_VREFRESH_HZ        60
  60
  61static int connector_get_modes(struct drm_connector *connector)
  62{
  63        struct xen_drm_front_drm_pipeline *pipeline =
  64                        to_xen_drm_pipeline(connector);
  65        struct drm_display_mode *mode;
  66        struct videomode videomode;
  67        int width, height;
  68
  69        mode = drm_mode_create(connector->dev);
  70        if (!mode)
  71                return 0;
  72
  73        memset(&videomode, 0, sizeof(videomode));
  74        videomode.hactive = pipeline->width;
  75        videomode.vactive = pipeline->height;
  76        width = videomode.hactive + videomode.hfront_porch +
  77                        videomode.hback_porch + videomode.hsync_len;
  78        height = videomode.vactive + videomode.vfront_porch +
  79                        videomode.vback_porch + videomode.vsync_len;
  80        videomode.pixelclock = width * height * XEN_DRM_CRTC_VREFRESH_HZ;
  81        mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
  82
  83        drm_display_mode_from_videomode(&videomode, mode);
  84        drm_mode_probed_add(connector, mode);
  85        return 1;
  86}
  87
  88static const struct drm_connector_helper_funcs connector_helper_funcs = {
  89        .get_modes = connector_get_modes,
  90        .detect_ctx = connector_detect,
  91};
  92
  93static const struct drm_connector_funcs connector_funcs = {
  94        .fill_modes = drm_helper_probe_single_connector_modes,
  95        .destroy = drm_connector_cleanup,
  96        .reset = drm_atomic_helper_connector_reset,
  97        .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
  98        .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
  99};
 100
 101int xen_drm_front_conn_init(struct xen_drm_front_drm_info *drm_info,
 102                            struct drm_connector *connector)
 103{
 104        struct xen_drm_front_drm_pipeline *pipeline =
 105                        to_xen_drm_pipeline(connector);
 106
 107        drm_connector_helper_add(connector, &connector_helper_funcs);
 108
 109        pipeline->conn_connected = true;
 110
 111        connector->polled = DRM_CONNECTOR_POLL_CONNECT |
 112                        DRM_CONNECTOR_POLL_DISCONNECT;
 113
 114        return drm_connector_init(drm_info->drm_dev, connector,
 115                                  &connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
 116}
 117