cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/udl/udl_connector.c

/*
 * 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>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License v2. See the file COPYING in the main directory of this archive for
 * more details.
 */

#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
#include <drm/drm_crtc_helper.h>
#include "udl_drv.h"

/* dummy connector to just get EDID,
   all UDL appear to have a DVI-D */


static u8 *udl_get_edid(struct udl_device *udl) { u8 *block; char *rbuf; int ret, i; block = kmalloc(EDID_LENGTH, GFP_KERNEL); if (block == NULL) return NULL; rbuf = kmalloc(2, GFP_KERNEL); if (rbuf == NULL) goto error; for (i = 0; i < EDID_LENGTH; i++) { ret = usb_control_msg(udl->udev, usb_rcvctrlpipe(udl->udev, 0), (0x02), (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2, HZ); if (ret < 1) { DRM_ERROR("Read EDID byte %d failed err %x\n", i, ret); goto error; } block[i] = rbuf[1]; } kfree(rbuf); return block; error: kfree(block); kfree(rbuf); return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Dave Airlie14282.08%133.33%
Hans de Goede2916.76%133.33%
David Herrmann21.16%133.33%
Total173100.00%3100.00%


static int udl_get_modes(struct drm_connector *connector) { struct udl_device *udl = connector->dev->dev_private; struct edid *edid; int ret; edid = (struct edid *)udl_get_edid(udl); if (!edid) { drm_mode_connector_update_edid_property(connector, NULL); return 0; } /* * We only read the main block, but if the monitor reports extension * blocks then the drm edid code expects them to be present, so patch * the extension count to 0. */ edid->checksum += edid->extensions; edid->extensions = 0; drm_mode_connector_update_edid_property(connector, edid); ret = drm_add_edid_modes(connector, edid); kfree(edid); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Dave Airlie8384.69%266.67%
Hans de Goede1515.31%133.33%
Total98100.00%3100.00%


static int 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; }

Contributors

PersonTokensPropCommitsCommitProp
Dave Airlie57100.00%2100.00%
Total57100.00%2100.00%


static enum drm_connector_status udl_detect(struct drm_connector *connector, bool force) { if (drm_device_is_unplugged(connector->dev)) return connector_status_disconnected; return connector_status_connected; }

Contributors

PersonTokensPropCommitsCommitProp
Dave Airlie30100.00%1100.00%
Total30100.00%1100.00%


static struct drm_encoder* udl_best_single_encoder(struct drm_connector *connector) { int enc_id = connector->encoder_ids[0]; return drm_encoder_find(connector->dev, enc_id); }

Contributors

PersonTokensPropCommitsCommitProp
Dave Airlie3090.91%133.33%
Rob Clark26.06%133.33%
Sachin Kamat13.03%133.33%
Total33100.00%3100.00%


static int udl_connector_set_property(struct drm_connector *connector, struct drm_property *property, uint64_t val) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Dave Airlie2195.45%150.00%
Sachin Kamat14.55%150.00%
Total22100.00%2100.00%


static void udl_connector_destroy(struct drm_connector *connector) { drm_connector_unregister(connector); drm_connector_cleanup(connector); kfree(connector); }

Contributors

PersonTokensPropCommitsCommitProp
Dave Airlie2596.15%150.00%
Thomas Wood13.85%150.00%
Total26100.00%2100.00%

static const struct drm_connector_helper_funcs udl_connector_helper_funcs = { .get_modes = udl_get_modes, .mode_valid = udl_mode_valid, .best_encoder = udl_best_single_encoder, }; static const struct drm_connector_funcs udl_connector_funcs = { .dpms = drm_helper_connector_dpms, .detect = udl_detect, .fill_modes = drm_helper_probe_single_connector_modes, .destroy = udl_connector_destroy, .set_property = udl_connector_set_property, };
int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder) { struct drm_connector *connector; connector = kzalloc(sizeof(struct drm_connector), GFP_KERNEL); if (!connector) return -ENOMEM; drm_connector_init(dev, connector, &udl_connector_funcs, DRM_MODE_CONNECTOR_DVII); drm_connector_helper_add(connector, &udl_connector_helper_funcs); drm_connector_register(connector); drm_mode_connector_attach_encoder(connector, encoder); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Dave Airlie7698.70%150.00%
Thomas Wood11.30%150.00%
Total77100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Dave Airlie52989.81%327.27%
Hans de Goede447.47%218.18%
Sachin Kamat40.68%19.09%
David Howells40.68%19.09%
Ville Syrjälä20.34%19.09%
David Herrmann20.34%19.09%
Rob Clark20.34%19.09%
Thomas Wood20.34%19.09%
Total589100.00%11100.00%
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