59277b679f
Add dynamic modeset support udlfb uses EDID to find the monitor’s preferred mode udlfb no longer has fixed mode tables – it’s able to set any mode dynamically, from the standard VESA timing characteristics of the monitor. Draws from probe and setmode code of both displaylink-mod 0.3 branch of Roberto De Ioris, and Jaya Kumar's displaylinkfb. Lays foundation for defio support and making backbuffer optional. With additional changes to minimize diffs and clean for checkpatch.pl style. Does not yet include new ioctls or refcount/mutex code from displaylink-mod. Tested to work with existing xf-video-displaylink X server unmodified. Signed-off-by: Bernie Thompson <bernie@plugable.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
#ifndef UDLFB_H
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#define UDLFB_H
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/* as libdlo */
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#define BUF_HIGH_WATER_MARK 1024
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#define BUF_SIZE (64*1024)
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struct dlfb_data {
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struct usb_device *udev;
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struct usb_interface *interface;
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struct urb *tx_urb, *ctrl_urb;
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struct usb_ctrlrequest dr;
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struct fb_info *info;
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char *buf;
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char *bufend;
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char *backing_buffer;
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struct mutex bulk_mutex;
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char edid[128];
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int screen_size;
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int line_length;
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struct completion done;
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int base16;
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int base16d;
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int base8;
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int base8d;
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u32 pseudo_palette[256];
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};
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static void dlfb_bulk_callback(struct urb *urb)
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{
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struct dlfb_data *dev_info = urb->context;
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complete(&dev_info->done);
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}
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static void dlfb_edid(struct dlfb_data *dev_info)
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{
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int i;
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int ret;
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char rbuf[2];
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for (i = 0; i < 128; i++) {
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ret =
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usb_control_msg(dev_info->udev,
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usb_rcvctrlpipe(dev_info->udev, 0), (0x02),
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(0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2,
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0);
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/*printk("ret control msg edid %d: %d [%d]\n",i, ret, rbuf[1]); */
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dev_info->edid[i] = rbuf[1];
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}
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}
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static int dlfb_bulk_msg(struct dlfb_data *dev_info, int len)
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{
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int ret;
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init_completion(&dev_info->done);
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dev_info->tx_urb->actual_length = 0;
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dev_info->tx_urb->transfer_buffer_length = len;
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ret = usb_submit_urb(dev_info->tx_urb, GFP_KERNEL);
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if (!wait_for_completion_timeout(&dev_info->done, 1000)) {
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usb_kill_urb(dev_info->tx_urb);
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printk("usb timeout !!!\n");
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}
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return dev_info->tx_urb->actual_length;
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}
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#define dlfb_set_register insert_command
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#endif
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