linux/drivers/gpu/drm/udl/udl_connector.c
Thomas Zimmermann 9fda81e00e drm/udl: Convert to struct drm_simple_display_pipe
Udl has a single display pipeline with a primary plane; perfect for
simple-pipe helpers. Convert it over. The old encoder and CRTC code
becomes unused and obsolete.

Exported formats for the primary plane are RGB565 and XRGB8888, with
the latter being emulated. The 16-bit format is the default and what
is used when communicating with the device.

This patch enables atomic modesetting for udl devices.

v3:
	* remove unused field crtc from struct udl_device
	* set crtc_state->no_vblank at beginning of enable()
v2:
	* move suspend/resume changes into separate patch
	* remove non-atomic code

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191210084905.5570-3-tzimmermann@suse.de
2019-12-11 17:02:16 +01:00

140 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;
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(udl->udev,
usb_rcvctrlpipe(udl->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 = connector->dev->dev_private;
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 = connector->dev->dev_private;
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 = {
.dpms = drm_helper_connector_dpms,
.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;
}