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path: root/drivers/gpu/drm/udl/udl_connector.c
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Diffstat (limited to 'drivers/gpu/drm/udl/udl_connector.c')
-rw-r--r--drivers/gpu/drm/udl/udl_connector.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/drivers/gpu/drm/udl/udl_connector.c b/drivers/gpu/drm/udl/udl_connector.c
new file mode 100644
index 000000000000..ba055e9ca007
--- /dev/null
+++ b/drivers/gpu/drm/udl/udl_connector.c
@@ -0,0 +1,141 @@
+/*
+ * 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 "drmP.h"
+#include "drm_crtc.h"
+#include "drm_edid.h"
+#include "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[3];
+ int ret, i;
+
+ block = kmalloc(EDID_LENGTH, GFP_KERNEL);
+ if (block == NULL)
+ return NULL;
+
+ for (i = 0; i < EDID_LENGTH; i++) {
+ ret = usb_control_msg(udl->ddev->usbdev,
+ usb_rcvctrlpipe(udl->ddev->usbdev, 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);
+ i--;
+ goto error;
+ }
+ block[i] = rbuf[1];
+ }
+
+ return block;
+
+error:
+ kfree(block);
+ return NULL;
+}
+
+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);
+
+ connector->display_info.raw_edid = (char *)edid;
+
+ drm_mode_connector_update_edid_property(connector, edid);
+ ret = drm_add_edid_modes(connector, edid);
+ connector->display_info.raw_edid = NULL;
+ kfree(edid);
+ return ret;
+}
+
+static int udl_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ return 0;
+}
+
+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;
+}
+
+struct drm_encoder *udl_best_single_encoder(struct drm_connector *connector)
+{
+ int enc_id = connector->encoder_ids[0];
+ struct drm_mode_object *obj;
+ struct drm_encoder *encoder;
+
+ obj = drm_mode_object_find(connector->dev, enc_id, DRM_MODE_OBJECT_ENCODER);
+ if (!obj)
+ return NULL;
+ encoder = obj_to_encoder(obj);
+ return encoder;
+}
+
+int udl_connector_set_property(struct drm_connector *connector, struct drm_property *property,
+ uint64_t val)
+{
+ return 0;
+}
+
+static void udl_connector_destroy(struct drm_connector *connector)
+{
+ drm_sysfs_connector_remove(connector);
+ drm_connector_cleanup(connector);
+ kfree(connector);
+}
+
+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,
+};
+
+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_sysfs_connector_add(connector);
+ drm_mode_connector_attach_encoder(connector, encoder);
+
+ drm_connector_attach_property(connector,
+ dev->mode_config.dirty_info_property,
+ 1);
+ return 0;
+}