mirror of https://gitee.com/openkylin/linux.git
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/*
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* Copyright (C) 2012 Red Hat
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* based in parts on udlfb.c:
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* Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
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* Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
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* Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License v2. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_edid.h>
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#include <drm/drm_crtc_helper.h>
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#include "udl_drv.h"
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/* dummy connector to just get EDID,
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all UDL appear to have a DVI-D */
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static u8 *udl_get_edid(struct udl_device *udl)
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{
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u8 *block;
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char rbuf[3];
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int ret, i;
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block = kmalloc(EDID_LENGTH, GFP_KERNEL);
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if (block == NULL)
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return NULL;
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for (i = 0; i < EDID_LENGTH; i++) {
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ret = usb_control_msg(udl->ddev->usbdev,
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usb_rcvctrlpipe(udl->ddev->usbdev, 0), (0x02),
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(0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2,
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HZ);
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if (ret < 1) {
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DRM_ERROR("Read EDID byte %d failed err %x\n", i, ret);
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i--;
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goto error;
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}
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block[i] = rbuf[1];
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}
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return block;
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error:
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kfree(block);
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return NULL;
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}
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static int udl_get_modes(struct drm_connector *connector)
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{
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struct udl_device *udl = connector->dev->dev_private;
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struct edid *edid;
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int ret;
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edid = (struct edid *)udl_get_edid(udl);
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connector->display_info.raw_edid = (char *)edid;
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drm_mode_connector_update_edid_property(connector, edid);
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ret = drm_add_edid_modes(connector, edid);
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connector->display_info.raw_edid = NULL;
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kfree(edid);
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return ret;
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}
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static int udl_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct udl_device *udl = connector->dev->dev_private;
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if (!udl->sku_pixel_limit)
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return 0;
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if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit)
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return MODE_VIRTUAL_Y;
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return 0;
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}
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static enum drm_connector_status
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udl_detect(struct drm_connector *connector, bool force)
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{
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if (drm_device_is_unplugged(connector->dev))
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return connector_status_disconnected;
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return connector_status_connected;
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}
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struct drm_encoder *udl_best_single_encoder(struct drm_connector *connector)
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{
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int enc_id = connector->encoder_ids[0];
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struct drm_mode_object *obj;
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struct drm_encoder *encoder;
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obj = drm_mode_object_find(connector->dev, enc_id, DRM_MODE_OBJECT_ENCODER);
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if (!obj)
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return NULL;
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encoder = obj_to_encoder(obj);
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return encoder;
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}
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int udl_connector_set_property(struct drm_connector *connector, struct drm_property *property,
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uint64_t val)
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{
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return 0;
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}
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static void udl_connector_destroy(struct drm_connector *connector)
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{
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drm_sysfs_connector_remove(connector);
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drm_connector_cleanup(connector);
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kfree(connector);
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}
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struct drm_connector_helper_funcs udl_connector_helper_funcs = {
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.get_modes = udl_get_modes,
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.mode_valid = udl_mode_valid,
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.best_encoder = udl_best_single_encoder,
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};
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struct drm_connector_funcs udl_connector_funcs = {
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.dpms = drm_helper_connector_dpms,
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.detect = udl_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = udl_connector_destroy,
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.set_property = udl_connector_set_property,
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};
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int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder)
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{
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struct drm_connector *connector;
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connector = kzalloc(sizeof(struct drm_connector), GFP_KERNEL);
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if (!connector)
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return -ENOMEM;
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drm_connector_init(dev, connector, &udl_connector_funcs, DRM_MODE_CONNECTOR_DVII);
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drm_connector_helper_add(connector, &udl_connector_helper_funcs);
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drm_sysfs_connector_add(connector);
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drm_mode_connector_attach_encoder(connector, encoder);
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drm_connector_attach_property(connector,
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dev->mode_config.dirty_info_property,
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1);
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return 0;
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}
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