diff options
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-core.c | 41 | ||||
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-dvb.c | 5 |
2 files changed, 34 insertions, 12 deletions
diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c index 01b89100ebd..57b1b5c6d88 100644 --- a/drivers/media/video/em28xx/em28xx-core.c +++ b/drivers/media/video/em28xx/em28xx-core.c @@ -1113,17 +1113,19 @@ EXPORT_SYMBOL_GPL(em28xx_init_isoc); int em28xx_isoc_dvb_max_packetsize(struct em28xx *dev) { unsigned int chip_cfg2; - unsigned int packet_size = 564; - - if (dev->chip_id == CHIP_ID_EM2874 || dev->chip_id == CHIP_ID_EM2884) { - /* FIXME - for now assume 564 like it was before, but the - em2874 code should be added to return the proper value... */ - packet_size = 564; - } else if (dev->chip_id == CHIP_ID_EM28174) { - /* FIXME same as em2874. 564 was enough for 22 Mbit DVB-T - but too much for 44 Mbit DVB-C. */ - packet_size = 752; - } else { + unsigned int packet_size; + + switch (dev->chip_id) { + case CHIP_ID_EM2710: + case CHIP_ID_EM2750: + case CHIP_ID_EM2800: + case CHIP_ID_EM2820: + case CHIP_ID_EM2840: + case CHIP_ID_EM2860: + /* No DVB support */ + return -EINVAL; + case CHIP_ID_EM2870: + case CHIP_ID_EM2883: /* TS max packet size stored in bits 1-0 of R01 */ chip_cfg2 = em28xx_read_reg(dev, EM28XX_R01_CHIPCFG2); switch (chip_cfg2 & EM28XX_CHIPCFG2_TS_PACKETSIZE_MASK) { @@ -1140,9 +1142,24 @@ int em28xx_isoc_dvb_max_packetsize(struct em28xx *dev) packet_size = 752; break; } + break; + case CHIP_ID_EM2874: + /* + * FIXME: for now assumes 564 like it was before, but the + * em2874 code should be added to return the proper value + */ + packet_size = 564; + break; + case CHIP_ID_EM2884: + case CHIP_ID_EM28174: + default: + /* + * FIXME: same as em2874. 564 was enough for 22 Mbit DVB-T + * but not enough for 44 Mbit DVB-C. + */ + packet_size = 752; } - em28xx_coredbg("dvb max packet size=%d\n", packet_size); return packet_size; } EXPORT_SYMBOL_GPL(em28xx_isoc_dvb_max_packetsize); diff --git a/drivers/media/video/em28xx/em28xx-dvb.c b/drivers/media/video/em28xx/em28xx-dvb.c index ab8a740bc68..e5916dee409 100644 --- a/drivers/media/video/em28xx/em28xx-dvb.c +++ b/drivers/media/video/em28xx/em28xx-dvb.c @@ -167,6 +167,11 @@ static int start_streaming(struct em28xx_dvb *dvb) return rc; max_dvb_packet_size = em28xx_isoc_dvb_max_packetsize(dev); + if (max_dvb_packet_size < 0) + return max_dvb_packet_size; + dprintk(1, "Using %d buffers each with %d bytes\n", + EM28XX_DVB_NUM_BUFS, + max_dvb_packet_size); return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS, EM28XX_DVB_NUM_BUFS, max_dvb_packet_size, |