2010-12-14 21:14:24 +00:00
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/*
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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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2012-10-02 17:01:07 +00:00
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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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2017-10-13 00:13:49 +00:00
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#include "udl_connector.h"
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2010-12-14 21:14:24 +00:00
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#include "udl_drv.h"
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2017-10-13 00:13:50 +00:00
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static bool udl_get_edid_block(struct udl_device *udl, int block_idx,
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u8 *buff)
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2010-12-14 21:14:24 +00:00
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{
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int ret, i;
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2017-10-13 00:13:50 +00:00
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u8 *read_buff;
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2010-12-14 21:14:24 +00:00
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2017-10-13 00:13:50 +00:00
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read_buff = kmalloc(2, GFP_KERNEL);
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if (!read_buff)
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return false;
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2013-01-11 11:08:57 +00:00
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2010-12-14 21:14:24 +00:00
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for (i = 0; i < EDID_LENGTH; i++) {
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2017-10-13 00:13:50 +00:00
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int bval = (i + block_idx * EDID_LENGTH) << 8;
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2014-08-29 10:12:45 +00:00
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ret = usb_control_msg(udl->udev,
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2017-10-13 00:13:50 +00:00
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usb_rcvctrlpipe(udl->udev, 0),
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(0x02), (0x80 | (0x02 << 5)), bval,
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0xA1, read_buff, 2, HZ);
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2010-12-14 21:14:24 +00:00
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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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2017-10-13 00:13:50 +00:00
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kfree(read_buff);
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return false;
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2010-12-14 21:14:24 +00:00
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}
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2017-10-13 00:13:50 +00:00
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buff[i] = read_buff[1];
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2010-12-14 21:14:24 +00:00
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}
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2017-10-13 00:13:50 +00:00
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kfree(read_buff);
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return true;
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2010-12-14 21:14:24 +00:00
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}
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2017-10-13 00:13:50 +00:00
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static bool udl_get_edid(struct udl_device *udl, u8 **result_buff,
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int *result_buff_size)
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2010-12-14 21:14:24 +00:00
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{
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2017-10-13 00:13:50 +00:00
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int i, extensions;
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u8 *block_buff = NULL, *buff_ptr;
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block_buff = kmalloc(EDID_LENGTH, GFP_KERNEL);
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if (block_buff == NULL)
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return false;
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if (udl_get_edid_block(udl, 0, block_buff) &&
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memchr_inv(block_buff, 0, EDID_LENGTH)) {
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extensions = ((struct edid *)block_buff)->extensions;
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if (extensions > 0) {
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/* we have to read all extensions one by one */
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*result_buff_size = EDID_LENGTH * (extensions + 1);
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*result_buff = kmalloc(*result_buff_size, GFP_KERNEL);
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buff_ptr = *result_buff;
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if (buff_ptr == NULL) {
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kfree(block_buff);
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return false;
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}
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memcpy(buff_ptr, block_buff, EDID_LENGTH);
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kfree(block_buff);
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buff_ptr += EDID_LENGTH;
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for (i = 1; i < extensions; ++i) {
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if (udl_get_edid_block(udl, i, buff_ptr)) {
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buff_ptr += EDID_LENGTH;
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} else {
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kfree(*result_buff);
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*result_buff = NULL;
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return false;
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}
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}
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return true;
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}
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/* we have only base edid block */
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*result_buff = block_buff;
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*result_buff_size = EDID_LENGTH;
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return true;
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2013-04-12 03:25:20 +00:00
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}
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2010-12-14 21:14:24 +00:00
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2017-10-13 00:13:50 +00:00
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kfree(block_buff);
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return false;
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2010-12-14 21:14:24 +00:00
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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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2017-10-13 00:13:49 +00:00
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struct udl_drm_connector *udl_connector =
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container_of(connector,
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struct udl_drm_connector,
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connector);
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2018-07-09 08:40:06 +00:00
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drm_connector_update_edid_property(connector, udl_connector->edid);
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2017-10-13 00:13:49 +00:00
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if (udl_connector->edid)
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return drm_add_edid_modes(connector, udl_connector->edid);
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return 0;
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2010-12-14 21:14:24 +00:00
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}
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2018-04-24 13:15:17 +00:00
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static enum drm_mode_status udl_mode_valid(struct drm_connector *connector,
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2010-12-14 21:14:24 +00:00
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struct drm_display_mode *mode)
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{
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2012-09-25 06:17:43 +00:00
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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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2010-12-14 21:14:24 +00:00
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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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2017-10-13 00:13:50 +00:00
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u8 *edid_buff = NULL;
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int edid_buff_size = 0;
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2017-10-13 00:13:49 +00:00
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struct udl_device *udl = connector->dev->dev_private;
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struct udl_drm_connector *udl_connector =
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container_of(connector,
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struct udl_drm_connector,
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connector);
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2017-10-13 00:13:50 +00:00
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/* cleanup previous edid */
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2017-10-13 00:13:49 +00:00
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if (udl_connector->edid != NULL) {
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kfree(udl_connector->edid);
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udl_connector->edid = NULL;
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}
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2017-10-13 00:13:50 +00:00
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if (!udl_get_edid(udl, &edid_buff, &edid_buff_size))
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2010-12-14 21:14:24 +00:00
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return connector_status_disconnected;
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2017-10-13 00:13:49 +00:00
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2017-10-13 00:13:50 +00:00
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udl_connector->edid = (struct edid *)edid_buff;
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2010-12-14 21:14:24 +00:00
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return connector_status_connected;
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}
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2012-11-19 05:27:43 +00:00
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static struct drm_encoder*
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udl_best_single_encoder(struct drm_connector *connector)
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2010-12-14 21:14:24 +00:00
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{
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int enc_id = connector->encoder_ids[0];
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2017-03-15 06:25:07 +00:00
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return drm_encoder_find(connector->dev, NULL, enc_id);
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2010-12-14 21:14:24 +00:00
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}
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2012-11-19 05:27:43 +00:00
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static int udl_connector_set_property(struct drm_connector *connector,
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struct drm_property *property,
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uint64_t val)
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2010-12-14 21:14:24 +00:00
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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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2017-10-13 00:13:49 +00:00
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struct udl_drm_connector *udl_connector =
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container_of(connector,
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struct udl_drm_connector,
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connector);
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2014-05-29 15:57:41 +00:00
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drm_connector_unregister(connector);
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2010-12-14 21:14:24 +00:00
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drm_connector_cleanup(connector);
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2017-10-13 00:13:49 +00:00
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kfree(udl_connector->edid);
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2010-12-14 21:14:24 +00:00
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kfree(connector);
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}
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2015-12-15 11:21:14 +00:00
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static const struct drm_connector_helper_funcs udl_connector_helper_funcs = {
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2010-12-14 21:14:24 +00:00
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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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2015-12-15 11:21:14 +00:00
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static const struct drm_connector_funcs udl_connector_funcs = {
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2010-12-14 21:14:24 +00:00
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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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2017-10-13 00:13:49 +00:00
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struct udl_drm_connector *udl_connector;
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2010-12-14 21:14:24 +00:00
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struct drm_connector *connector;
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2017-10-13 00:13:49 +00:00
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udl_connector = kzalloc(sizeof(struct udl_drm_connector), GFP_KERNEL);
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if (!udl_connector)
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2010-12-14 21:14:24 +00:00
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return -ENOMEM;
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2017-10-13 00:13:49 +00:00
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connector = &udl_connector->connector;
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drm_connector_init(dev, connector, &udl_connector_funcs,
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DRM_MODE_CONNECTOR_DVII);
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2010-12-14 21:14:24 +00:00
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drm_connector_helper_add(connector, &udl_connector_helper_funcs);
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2014-05-29 15:57:41 +00:00
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drm_connector_register(connector);
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2018-07-09 08:40:07 +00:00
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drm_connector_attach_encoder(connector, encoder);
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2017-10-13 00:13:49 +00:00
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connector->polled = DRM_CONNECTOR_POLL_HPD |
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DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
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2010-12-14 21:14:24 +00:00
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return 0;
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}
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