Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

V4L/DVB: gspca_xirlink_cit: adjust ibm netcam pro framerate for available bandwidth

Browse source 
gspca_xirlink_cit: adjust ibm netcam pro framerate for available bandwidth

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans de Goede 2010-09-06 05:24:21 -03:00 committed by Mauro Carvalho Chehab
parent b517af7228
commit 41f424ba4d
1 changed files with 31 additions and 19 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

50
drivers/media/video/gspca/xirlink_cit.c
View file

@ -1593,9 +1593,9 @@ static int cit_get_packet_size(struct gspca_dev *gspca_dev)
return le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
}
static int cit_start_model0(struct gspca_dev *gspca_dev)
/* Calculate the clockdiv giving us max fps given the available bandwidth */
static int cit_get_clock_div(struct gspca_dev *gspca_dev)
{
const unsigned short compression = 0; /* 0=none, 7=best frame rate */
int clock_div = 7; /* 0=30 1=25 2=20 3=15 4=12 5=7.5 6=6 7=3fps ?? */
int fps[8] = { 30, 25, 20, 15, 12, 8, 6, 3 };
int packet_size;
@ -1610,6 +1610,23 @@ static int cit_start_model0(struct gspca_dev *gspca_dev)
fps[clock_div - 1] * 3 / 2)
clock_div--;
PDEBUG(D_PROBE,
"PacketSize: %d, res: %dx%d -> using clockdiv: %d (%d fps)",
packet_size, gspca_dev->width, gspca_dev->height, clock_div,
fps[clock_div]);
return clock_div;
}
static int cit_start_model0(struct gspca_dev *gspca_dev)
{
const unsigned short compression = 0; /* 0=none, 7=best frame rate */
int clock_div;
clock_div = cit_get_clock_div(gspca_dev);
if (clock_div < 0)
return clock_div;
cit_write_reg(gspca_dev, 0x0000, 0x0100); /* turn on led */
cit_write_reg(gspca_dev, 0x0003, 0x0438);
cit_write_reg(gspca_dev, 0x001e, 0x042b);
@ -1651,7 +1668,6 @@ static int cit_start_model0(struct gspca_dev *gspca_dev)
cit_write_reg(gspca_dev, compression, 0x0109);
cit_write_reg(gspca_dev, clock_div, 0x0111);
PDEBUG(D_PROBE, "Using clockdiv: %d", clock_div);
return 0;
}
@ -1659,19 +1675,11 @@ static int cit_start_model0(struct gspca_dev *gspca_dev)
static int cit_start_model1(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int clock_div = 7; /* 0=30 1=25 2=20 3=15 4=12 5=7.5 6=6 7=3fps ?? */
int fps[8] = { 30, 25, 20, 15, 12, 8, 6, 3 };
int i, packet_size;
int i, clock_div;
packet_size = cit_get_packet_size(gspca_dev);
if (packet_size < 0)
return packet_size;
while (clock_div > 3 &&
1000 * packet_size >
gspca_dev->width * gspca_dev->height *
fps[clock_div - 1] * 3 / 2)
clock_div--;
clock_div = cit_get_clock_div(gspca_dev);
if (clock_div < 0)
return clock_div;
cit_read_reg(gspca_dev, 0x0128);
cit_read_reg(gspca_dev, 0x0100);
@ -1861,7 +1869,6 @@ static int cit_start_model1(struct gspca_dev *gspca_dev)
cit_write_reg(gspca_dev, 0x01, 0x0100); /* LED On */
cit_write_reg(gspca_dev, clock_div, 0x0111);
PDEBUG(D_PROBE, "Using clockdiv: %d", clock_div);
return 0;
}
@ -2255,6 +2262,9 @@ static int cit_start_model3(struct gspca_dev *gspca_dev)
cit_model3_Packet1(gspca_dev, 0x0097, 0x0096); /* Blue sharpness */
cit_model3_Packet1(gspca_dev, 0x0098, 0x000b);
/* FIXME we should probably use cit_get_clock_div() here (in
combination with isoc negotiation using the programmable isoc size)
like with the IBM netcam pro). */
cit_write_reg(gspca_dev, clock_div, 0x0111); /* Clock Divider */
switch (gspca_dev->width) {
@ -2622,7 +2632,11 @@ static int cit_start_model4(struct gspca_dev *gspca_dev)
static int cit_start_ibm_netcam_pro(struct gspca_dev *gspca_dev)
{
const unsigned short compression = 0; /* 0=none, 7=best frame rate */
int i, clock_div = 0;
int i, clock_div;
clock_div = cit_get_clock_div(gspca_dev);
if (clock_div < 0)
return clock_div;
cit_write_reg(gspca_dev, 0x0003, 0x0133);
cit_write_reg(gspca_dev, 0x0000, 0x0117);
@ -2661,7 +2675,6 @@ static int cit_start_ibm_netcam_pro(struct gspca_dev *gspca_dev)
cit_write_reg(gspca_dev, 0x008b, 0x011c);
cit_write_reg(gspca_dev, 0x0008, 0x0118);
cit_write_reg(gspca_dev, 0x0000, 0x0132);
clock_div = 3;
break;
case 320: /* 320x240 */
cit_write_reg(gspca_dev, 0x0028, 0x010b);
@ -2673,7 +2686,6 @@ static int cit_start_ibm_netcam_pro(struct gspca_dev *gspca_dev)
cit_write_reg(gspca_dev, 0x003f, 0x011c);
cit_write_reg(gspca_dev, 0x000c, 0x0118);
cit_write_reg(gspca_dev, 0x0000, 0x0132);
clock_div = 5;
break;
}