mirror of https://gitee.com/openkylin/linux.git
139 lines
3.6 KiB
C
139 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2012 Red Hat
|
|
* based in parts on udlfb.c:
|
|
* Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
|
|
* Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
|
|
* Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
|
|
*/
|
|
|
|
#include <drm/drm_atomic_state_helper.h>
|
|
#include <drm/drm_crtc_helper.h>
|
|
#include <drm/drm_probe_helper.h>
|
|
|
|
#include "udl_connector.h"
|
|
#include "udl_drv.h"
|
|
|
|
static int udl_get_edid_block(void *data, u8 *buf, unsigned int block,
|
|
size_t len)
|
|
{
|
|
int ret, i;
|
|
u8 *read_buff;
|
|
struct udl_device *udl = data;
|
|
struct usb_device *udev = udl_to_usb_device(udl);
|
|
|
|
read_buff = kmalloc(2, GFP_KERNEL);
|
|
if (!read_buff)
|
|
return -1;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
int bval = (i + block * EDID_LENGTH) << 8;
|
|
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
|
|
0x02, (0x80 | (0x02 << 5)), bval,
|
|
0xA1, read_buff, 2, HZ);
|
|
if (ret < 1) {
|
|
DRM_ERROR("Read EDID byte %d failed err %x\n", i, ret);
|
|
kfree(read_buff);
|
|
return -1;
|
|
}
|
|
buf[i] = read_buff[1];
|
|
}
|
|
|
|
kfree(read_buff);
|
|
return 0;
|
|
}
|
|
|
|
static int udl_get_modes(struct drm_connector *connector)
|
|
{
|
|
struct udl_drm_connector *udl_connector =
|
|
container_of(connector,
|
|
struct udl_drm_connector,
|
|
connector);
|
|
|
|
drm_connector_update_edid_property(connector, udl_connector->edid);
|
|
if (udl_connector->edid)
|
|
return drm_add_edid_modes(connector, udl_connector->edid);
|
|
return 0;
|
|
}
|
|
|
|
static enum drm_mode_status udl_mode_valid(struct drm_connector *connector,
|
|
struct drm_display_mode *mode)
|
|
{
|
|
struct udl_device *udl = to_udl(connector->dev);
|
|
if (!udl->sku_pixel_limit)
|
|
return 0;
|
|
|
|
if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit)
|
|
return MODE_VIRTUAL_Y;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum drm_connector_status
|
|
udl_detect(struct drm_connector *connector, bool force)
|
|
{
|
|
struct udl_device *udl = to_udl(connector->dev);
|
|
struct udl_drm_connector *udl_connector =
|
|
container_of(connector,
|
|
struct udl_drm_connector,
|
|
connector);
|
|
|
|
/* cleanup previous edid */
|
|
if (udl_connector->edid != NULL) {
|
|
kfree(udl_connector->edid);
|
|
udl_connector->edid = NULL;
|
|
}
|
|
|
|
udl_connector->edid = drm_do_get_edid(connector, udl_get_edid_block, udl);
|
|
if (!udl_connector->edid)
|
|
return connector_status_disconnected;
|
|
|
|
return connector_status_connected;
|
|
}
|
|
|
|
static void udl_connector_destroy(struct drm_connector *connector)
|
|
{
|
|
struct udl_drm_connector *udl_connector =
|
|
container_of(connector,
|
|
struct udl_drm_connector,
|
|
connector);
|
|
|
|
drm_connector_cleanup(connector);
|
|
kfree(udl_connector->edid);
|
|
kfree(connector);
|
|
}
|
|
|
|
static const struct drm_connector_helper_funcs udl_connector_helper_funcs = {
|
|
.get_modes = udl_get_modes,
|
|
.mode_valid = udl_mode_valid,
|
|
};
|
|
|
|
static const struct drm_connector_funcs udl_connector_funcs = {
|
|
.reset = drm_atomic_helper_connector_reset,
|
|
.detect = udl_detect,
|
|
.fill_modes = drm_helper_probe_single_connector_modes,
|
|
.destroy = udl_connector_destroy,
|
|
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
|
|
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
|
|
};
|
|
|
|
struct drm_connector *udl_connector_init(struct drm_device *dev)
|
|
{
|
|
struct udl_drm_connector *udl_connector;
|
|
struct drm_connector *connector;
|
|
|
|
udl_connector = kzalloc(sizeof(struct udl_drm_connector), GFP_KERNEL);
|
|
if (!udl_connector)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
connector = &udl_connector->connector;
|
|
drm_connector_init(dev, connector, &udl_connector_funcs,
|
|
DRM_MODE_CONNECTOR_DVII);
|
|
drm_connector_helper_add(connector, &udl_connector_helper_funcs);
|
|
|
|
connector->polled = DRM_CONNECTOR_POLL_HPD |
|
|
DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
|
|
|
|
return connector;
|
|
}
|