From 9c1133c7c89266d4969e36527ce7be958d1b93c6 Mon Sep 17 00:00:00 2001 From: Malcolm Priestley Date: Sun, 27 Nov 2011 17:35:06 -0300 Subject: [PATCH] [media] it913x: endpoint size changes Previously endpoint had been aligned to packet size (128) Some early it9135 devices appear to have problems with this. This patch now aligns with mpeg TS size (188) With the pid filter off max size is increased to the maxmium size (348 * 188) Signed-off-by: Malcolm Priestley Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/dvb-usb/it913x.c | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-) diff --git a/drivers/media/dvb/dvb-usb/it913x.c b/drivers/media/dvb/dvb-usb/it913x.c index 9abdaee4aa6c..24f04b4ac87c 100644 --- a/drivers/media/dvb/dvb-usb/it913x.c +++ b/drivers/media/dvb/dvb-usb/it913x.c @@ -337,6 +337,13 @@ static int it913x_rc_query(struct dvb_usb_device *d) return ret; } + +#define TS_MPEG_PKT_SIZE 188 +#define EP_LOW 21 +#define TS_BUFFER_SIZE_PID (EP_LOW*TS_MPEG_PKT_SIZE) +#define EP_HIGH 348 +#define TS_BUFFER_SIZE_MAX (EP_HIGH*TS_MPEG_PKT_SIZE) + static int it913x_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props, struct dvb_usb_device_description **desc, @@ -374,6 +381,17 @@ static int it913x_identify_state(struct usb_device *udev, info("Dual mode=%x Remote=%x Tuner Type=%x", it913x_config.dual_mode , remote, it913x_config.tuner_id_0); + /* Select Stream Buffer Size */ + if (pid_filter) + props->adapter[0].fe[0].stream.u.bulk.buffersize = + TS_BUFFER_SIZE_MAX; + else + props->adapter[0].fe[0].stream.u.bulk.buffersize = + TS_BUFFER_SIZE_PID; + if (it913x_config.dual_mode) + props->adapter[1].fe[0].stream.u.bulk.buffersize = + props->adapter[0].fe[0].stream.u.bulk.buffersize; + if (firm_no > 0) { *cold = 0; return 0; @@ -511,7 +529,7 @@ static int it913x_frontend_attach(struct dvb_usb_adapter *adap) struct usb_device *udev = adap->dev->udev; int ret = 0; u8 adap_addr = I2C_BASE_ADDR + (adap->id << 5); - u16 ep_size = adap->props.fe[0].stream.u.bulk.buffersize; + u16 ep_size = adap->props.fe[0].stream.u.bulk.buffersize / 4; u8 pkt_size = 0x80; if (adap->dev->udev->speed != USB_SPEED_HIGH) @@ -610,8 +628,8 @@ static struct dvb_usb_device_properties it913x_properties = { .endpoint = 0x04, .u = {/* Keep Low if PID filter on */ .bulk = { - .buffersize = 3584, - + .buffersize = + TS_BUFFER_SIZE_PID, } } } @@ -635,8 +653,8 @@ static struct dvb_usb_device_properties it913x_properties = { .endpoint = 0x05, .u = { .bulk = { - .buffersize = 3584, - + .buffersize = + TS_BUFFER_SIZE_PID, } } } -- 2.20.1