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| author | Matt Doran <matt.doran@papercut.biz> | 2007-07-31 14:09:30 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-10-10 05:03:50 +0400 |
| commit | 8f6956c7f9fa72c502bde47df4122bd32d0b86d5 (patch) | |
| tree | b2ebe02557ee2bcf7644fd406f93bcdcc271c431 /drivers/media/dvb/frontends/dib3000mc.c | |
| parent | 8779737b8e01b95fe6f1e33dc90ea621281c7b67 (diff) | |
| download | linux-8f6956c7f9fa72c502bde47df4122bd32d0b86d5.tar.xz | |
V4L/DVB (5960): Add module parameter to enable SFN workaround
In some areas in the world the broadcasters are not using the same
cellid for each transmitter in a SFN. The DiBcom has problems with
that setup. The module parameter buggy_sfn_workaround makes it re-usable.
Signed-off-by: Matt Doran <matt.doran@papercut.biz>
Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/dvb/frontends/dib3000mc.c')
| -rw-r--r-- | drivers/media/dvb/frontends/dib3000mc.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/drivers/media/dvb/frontends/dib3000mc.c b/drivers/media/dvb/frontends/dib3000mc.c index 38d2322cbaf6..f0096de2279e 100644 --- a/drivers/media/dvb/frontends/dib3000mc.c +++ b/drivers/media/dvb/frontends/dib3000mc.c @@ -13,10 +13,6 @@ #include <linux/kernel.h> #include <linux/i2c.h> -//#include <linux/init.h> -//#include <linux/delay.h> -//#include <linux/string.h> -//#include <linux/slab.h> #include "dvb_frontend.h" @@ -26,6 +22,10 @@ static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "turn on debugging (default: 0)"); +static int buggy_sfn_workaround; +module_param(buggy_sfn_workaround, int, 0644); +MODULE_PARM_DESC(debug, "Enable work-around for buggy SFNs (default: 0)"); + #define dprintk(args...) do { if (debug) { printk(KERN_DEBUG "DiB3000MC/P:"); printk(args); printk("\n"); } } while (0) struct dib3000mc_state { @@ -42,6 +42,8 @@ struct dib3000mc_state { fe_bandwidth_t current_bandwidth; u16 dev_id; + + u8 sfn_workaround_active :1; }; static u16 dib3000mc_read_word(struct dib3000mc_state *state, u16 reg) @@ -591,7 +593,14 @@ static int dib3000mc_tune(struct dvb_frontend *demod, struct dvb_frontend_parame dib3000mc_set_channel_cfg(state, ch, 0); // activates isi - dib3000mc_write_word(state, 29, 0x1073); + if (state->sfn_workaround_active) { + dprintk("SFN workaround is active\n"); + dib3000mc_write_word(state, 29, 0x1273); + dib3000mc_write_word(state, 108, 0x4000); // P_pha3_force_pha_shift + } else { + dib3000mc_write_word(state, 29, 0x1073); + dib3000mc_write_word(state, 108, 0x0000); // P_pha3_force_pha_shift + } dib3000mc_set_adp_cfg(state, (u8)ch->u.ofdm.constellation); if (ch->u.ofdm.transmission_mode == TRANSMISSION_MODE_8K) { @@ -679,6 +688,9 @@ static int dib3000mc_set_frontend(struct dvb_frontend* fe, state->current_bandwidth = fep->u.ofdm.bandwidth; dib3000mc_set_bandwidth(state, BANDWIDTH_TO_KHZ(fep->u.ofdm.bandwidth)); + /* maybe the parameter has been changed */ + state->sfn_workaround_active = buggy_sfn_workaround; + if (fe->ops.tuner_ops.set_params) { fe->ops.tuner_ops.set_params(fe, fep); msleep(100); |