Staging: udlfb: add dynamic modeset support

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: NBernie Thompson <bernie@plugable.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

 

drivers/staging/udlfb/udlfb.h

 #ifndef UDLFB_H
 #define UDLFB_H
 
-#define MAX_VMODES	4
-#define FB_BPP		16
-
-#define STD_CHANNEL	"\x57\xCD\xDC\xA7\x1C\x88\x5E\x15"	\
-			"\x60\xFE\xC6\x97\x16\x3D\x47\xF2"
-
 /* as libdlo */
 #define BUF_HIGH_WATER_MARK	1024
 #define BUF_SIZE		(64*1024)
@@ -29,21 +23,9 @@ struct dlfb_data {
 	int base16d;
 	int base8;
 	int base8d;
+	u32 pseudo_palette[256];
 };
 
-struct dlfb_video_mode {
-	uint8_t col;
-	uint32_t hclock;
-	uint32_t vclock;
-	uint8_t unknown1[6];
-	uint16_t xres;
-	uint8_t unknown2[6];
-	uint16_t yres;
-	uint8_t unknown3[4];
-} __attribute__ ((__packed__));
-
-static struct dlfb_video_mode dlfb_video_modes[MAX_VMODES];
-
 static void dlfb_bulk_callback(struct urb *urb)
 {
 	struct dlfb_data *dev_info = urb->context;
@@ -86,140 +68,6 @@ static int dlfb_bulk_msg(struct dlfb_data *dev_info, int len)
 	return dev_info->tx_urb->actual_length;
 }
 
-static void dlfb_init_modes(void)
-{
-	dlfb_video_modes[0].col = 0;
-	memcpy(&dlfb_video_modes[0].hclock, "\x20\x3C\x7A\xC9", 4);
-	memcpy(&dlfb_video_modes[0].vclock, "\xF2\x6C\x48\xF9", 4);
-	memcpy(&dlfb_video_modes[0].unknown1, "\x70\x53\xFF\xFF\x21\x27", 6);
-	dlfb_video_modes[0].xres = 800;
-	memcpy(&dlfb_video_modes[0].unknown2, "\x91\xF3\xFF\xFF\xFF\xF9", 6);
-	dlfb_video_modes[0].yres = 480;
-	memcpy(&dlfb_video_modes[0].unknown3, "\x01\x02\xC8\x19", 4);
-
-	dlfb_video_modes[1].col = 0;
-	memcpy(&dlfb_video_modes[1].hclock, "\x36\x18\xD5\x10", 4);
-	memcpy(&dlfb_video_modes[1].vclock, "\x60\xA9\x7B\x33", 4);
-	memcpy(&dlfb_video_modes[1].unknown1, "\xA1\x2B\x27\x32\xFF\xFF", 6);
-	dlfb_video_modes[1].xres = 1024;
-	memcpy(&dlfb_video_modes[1].unknown2, "\xD9\x9A\xFF\xCA\xFF\xFF", 6);
-	dlfb_video_modes[1].yres = 768;
-	memcpy(&dlfb_video_modes[1].unknown3, "\x04\x03\xC8\x32", 4);
-
-	dlfb_video_modes[2].col = 0;
-	memcpy(&dlfb_video_modes[2].hclock, "\x98\xF8\x0D\x57", 4);
-	memcpy(&dlfb_video_modes[2].vclock, "\x2A\x55\x4D\x54", 4);
-	memcpy(&dlfb_video_modes[2].unknown1, "\xCA\x0D\xFF\xFF\x94\x43", 6);
-	dlfb_video_modes[2].xres = 1280;
-	memcpy(&dlfb_video_modes[2].unknown2, "\x9A\xA8\xFF\xFF\xFF\xF9", 6);
-	dlfb_video_modes[2].yres = 1024;
-	memcpy(&dlfb_video_modes[2].unknown3, "\x04\x02\x60\x54", 4);
-
-	dlfb_video_modes[3].col = 0;
-	memcpy(&dlfb_video_modes[3].hclock, "\x42\x24\x38\x36", 4);
-	memcpy(&dlfb_video_modes[3].vclock, "\xC1\x52\xD9\x29", 4);
-	memcpy(&dlfb_video_modes[3].unknown1, "\xEA\xB8\x32\x60\xFF\xFF", 6);
-	dlfb_video_modes[3].xres = 1400;
-	memcpy(&dlfb_video_modes[3].unknown2, "\xC9\x4E\xFF\xFF\xFF\xF2", 6);
-	dlfb_video_modes[3].yres = 1050;
-	memcpy(&dlfb_video_modes[3].unknown3, "\x04\x02\x1E\x5F", 4);
-}
-
-static char *dlfb_set_register(char *bufptr, uint8_t reg, uint8_t val)
-{
-	*bufptr++ = 0xAF;
-	*bufptr++ = 0x20;
-	*bufptr++ = reg;
-	*bufptr++ = val;
-
-	return bufptr;
-}
-
-static int dlfb_set_video_mode(struct dlfb_data *dev_info, int width, int height)
-{
-	int i, ret;
-	unsigned char j;
-	char *bufptr = dev_info->buf;
-	uint8_t *vdata;
-
-	for (i = 0; i < MAX_VMODES; i++) {
-		printk("INIT VIDEO %d %d %d\n", i, dlfb_video_modes[i].xres,
-		       dlfb_video_modes[i].yres);
-		if (dlfb_video_modes[i].xres == width
-		    && dlfb_video_modes[i].yres == height) {
-
-			dev_info->base16 = 0;
-			dev_info->base16d = width * height * (FB_BPP / 8);
-
-			//dev_info->base8 = width * height * (FB_BPP / 8);
-
-			dev_info->base8 = dev_info->base16;
-			dev_info->base8d = dev_info->base16d;
-
-			/* set encryption key (null) */
-			memcpy(dev_info->buf, STD_CHANNEL, 16);
-			ret =
-			    usb_control_msg(dev_info->udev,
-					    usb_sndctrlpipe(dev_info->udev, 0),
-					    0x12, (0x02 << 5), 0, 0,
-					    dev_info->buf, 16, 0);
-			printk("ret control msg 1 (STD_CHANNEL): %d\n", ret);
-
-			/* set registers */
-			bufptr = dlfb_set_register(bufptr, 0xFF, 0x00);
-
-			/* set color depth */
-			bufptr = dlfb_set_register(bufptr, 0x00, 0x00);
-
-			/* set addresses */
-			bufptr =
-			    dlfb_set_register(bufptr, 0x20,
-					      (char)(dev_info->base16 >> 16));
-			bufptr =
-			    dlfb_set_register(bufptr, 0x21,
-					      (char)(dev_info->base16 >> 8));
-			bufptr =
-			    dlfb_set_register(bufptr, 0x22,
-					      (char)(dev_info->base16));
-
-			bufptr =
-			    dlfb_set_register(bufptr, 0x26,
-					      (char)(dev_info->base8 >> 16));
-			bufptr =
-			    dlfb_set_register(bufptr, 0x27,
-					      (char)(dev_info->base8 >> 8));
-			bufptr =
-			    dlfb_set_register(bufptr, 0x28,
-					      (char)(dev_info->base8));
-
-			/* set video mode */
-			vdata = (uint8_t *)&dlfb_video_modes[i];
-			for (j = 0; j < 29; j++)
-				bufptr = dlfb_set_register(bufptr, j, vdata[j]);
-
-			/* blank */
-			bufptr = dlfb_set_register(bufptr, 0x1F, 0x00);
-
-			/* end registers */
-			bufptr = dlfb_set_register(bufptr, 0xFF, 0xFF);
-
-			/* send */
-			ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
-			printk("ret bulk 2: %d %td\n", ret,
-			       bufptr - dev_info->buf);
-
-			/* flush */
-			ret = dlfb_bulk_msg(dev_info, 0);
-			printk("ret bulk 3: %d\n", ret);
-
-			dev_info->screen_size = width * height * (FB_BPP / 8);
-			dev_info->line_length = width * (FB_BPP / 8);
-
-			return 0;
-		}
-	}
-
-	return -1;
-}
+#define dlfb_set_register insert_command
 
 #endif