cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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xen_drm_front_conn.c (3219B)

      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}