On Wed, 2009-04-29 at 20:12 +1000, Dmitri Belimov wrote: > Hi, > > > Am Dienstag, den 28.04.2009, 19:59 +1000 schrieb Dmitri Belimov: > > > On Tue, 28 Apr 2009 15:18:32 -0300 > > > Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx> wrote: > > > > > > > On Mon, 27 Apr 2009 19:29:05 +1000 > > > > Dmitri Belimov <d.belimov@xxxxxxxxx> wrote: > > > > > > > > > Hi All > > > > > > > > > > Step by step. > > > > > > > > > > This is patch for change only range of FM1216ME_MK3. Slow > > > > > tunning is not a big problem. > > > > > > > > Dmitri, > > > > > > > > I'll mark those patches as RFC at patchwork until the end of those > > > > discussions. After that, please send it again into a new thread. > > > > > > You mark patch with TOP AGC not this. > > > > > > I think need discuss about FM1216ME_MK3 because I'll have a big > > > patch for support control TOP AGC (sensitivity) of this tuner. It > > > can be bad for compatible tuners. > > > > hmm, in Europe, that TOP AGC did not ever made much difference and it > > is an insmod option since ever. > > > > I can't tell for Sibiria and initially that tuner had no SECAM-DK > > support officially at all. There are no good/much_better tuners for > > FTA at all and never have been ;) > > > > Some examples, user success reports, to make it more easily to > > understand? I think it can only change some _very little_ under > > already worst conditions. > > This is my idea for RFC about TOP AGC: > > 1. Add gain variable to tuner structure. > 2. Add V4L2_CID_GAIN control to saa7134 and disable this control. > 3. Add workaround to simple_post_tune function for write sensitivity level to the tuner. > 4. Enable V4L2_CID_GAIN control when module load if card is right. > > My expirience not so good, step 4 segfault the kernel. How to we can make it? > > Our windows end-user programm control the sensitivity of each TV channel and change when > channel changed. > > What you think about it?? Dmitri, >From my understanding the take over point is the signal strength level that you want the second stage (an IF demod chip like the TDA9887) to take over automatic gain control from the first stage (a tuner chip like the TUA6030). The objective is to set the TOP to achieve maximum gain in the first stage while avoiding clipping in the first stage. When the input signal level is smaller than the TOP, the first stage gain is at a maximum, and the second stage is performing automatic gain control internally. When the input signal level becomes greater than the TOP, the first stage gain needs to be reduced by an AGC, and the second stage gain remains constant. As I understand it, it would be best to set the first stage (TUA6030 or similar) to "External AGC" and set the take over point in the second stage (the TDA9887), if the pins between the chips are wired up properly inside the tuner. This should coordinate the AGC in both the first stage and second stage of the tuner, as the second stage will be providing the gain control to the first stage as needed when the signal reaches the TOP. http://www.comsec.com/usrp/microtune/NF_tutorial.pdf It allows you to achieve maximum gain in the first stage to minimize overall receiver noise figure, and avoid clipping the input signal in the first stage (TUA6030) with a proper TOP setting in the second stage (TDA9887). The TOP setting in the second stage needs to take into account IF SAW filter attenuation of course. Do the circuit board traces in the FM1216ME_MK3 support the TDA9887 controlling the gain of the first stage? (I've never opened an equivalent NTSC tuner assembly to take a look.) If not, then, if I understand things correctly, you need to set the first stage and second stage TOP settings so that they refer to about the same signal level before the IF SAW filter. I would think AGC TOP settings, for both stages of the tuner, are tuner-dependent and relatively constant once you figure out what they should be. Do you have a different understanding or insight? Regards, Andy > If TV card is not touch V4L2_CTRL_FLAG_DISABLED in this control. The programm can't change AGC TOP. > And write default value to AGC TOP like now. > > diff -r 43dbc8ebb5a2 linux/drivers/media/common/tuners/tuner-simple.c > --- a/linux/drivers/media/common/tuners/tuner-simple.c Tue Jan 27 23:47:50 2009 -0200 > +++ b/linux/drivers/media/common/tuners/tuner-simple.c Tue Apr 21 09:44:38 2009 +1000 > @@ -116,6 +116,7 @@ > > u32 frequency; > u32 bandwidth; > + signed int gain; > }; > > /* ---------------------------------------------------------------------- */ > @@ -495,15 +507,57 @@ > "(should be 4)\n", rc); > break; > } > + case TUNER_PHILIPS_FM1216ME_MK3: > + { > + buffer[2] = 0xDE; /* T2 = 0, T1 = 1 and T0 = 1 */ > + switch (priv->gain) { > + case 0: > + /* TOP = External AGC, ATC = OFF */ > + buffer[3] = 0x60; > + break; > + case 1: > + /* TOP = 118 dB, ATC = OFF */ > + buffer[3] = 0x00; > + break; > + case 2: > + /* TOP = 115 dB, ATC = OFF */ > + buffer[3] = 0x10; > + break; > + case 3: > + /* TOP = 112 dB, ATC = OFF */ > + buffer[3] = 0x20; > + break; > + case 4: > + /* TOP = 109 dB, ATC = OFF */ > + buffer[3] = 0x30; > + break; > + case 5: > + /* TOP = 106 dB, ATC = OFF */ > + buffer[3] = 0x40; > + break; > + case 6: > + /* TOP = 103 dB, ATC = OFF */ > + buffer[3] = 0x50; > + break; > + default: > + /* TOP = 112 dB, ATC = OFF */ > + buffer[3] = 0x20; > + break; > + } > + > + tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n", > + buffer[0], buffer[1], buffer[2], buffer[3]); > + > + rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 4); > + if (4 != rc) > + tuner_warn("i2c i/o error: rc == %d " > + "(should be 4)\n", rc); > + > + break; > } > - > + } > return 0; > } > > diff -r 43dbc8ebb5a2 linux/drivers/media/video/saa7134/saa7134-cards.c > --- a/linux/drivers/media/video/saa7134/saa7134-cards.c Tue Jan 27 23:47:50 2009 -0200 > +++ b/linux/drivers/media/video/saa7134/saa7134-cards.c Tue Apr 21 09:44:38 2009 +1000 > @@ -6506,6 +6806,20 @@ > saa_call_all(dev, tuner, s_config, &tea5767_cfg); > break; > } > + case SAA7134_BOARD_BEHOLD_M6_EXTRA: > + { > + struct v4l2_queryctrl *ctl; > + struct saa7134_fh *fh; > + struct file *fl; > + > + ctl->id = V4L2_CID_GAIN; > + if (saa7134_queryctrl(fl, fh, ctl) == 0) { /* BUG here */ > + /* enable this control */ > + ctl->flags &= ~(V4L2_CTRL_FLAG_DISABLED); > + } > + } > } /* switch() */ > > saa7134_tuner_setup(dev); > diff -r 43dbc8ebb5a2 linux/drivers/media/video/saa7134/saa7134-video.c > --- a/linux/drivers/media/video/saa7134/saa7134-video.c Tue Jan 27 23:47:50 2009 -0200 > +++ b/linux/drivers/media/video/saa7134/saa7134-video.c Tue Apr 21 09:44:38 2009 +1000 > @@ -417,6 +417,15 @@ > .step = 1, > .default_value = 0, > .type = V4L2_CTRL_TYPE_INTEGER, > + }, { > + .id = V4L2_CID_GAIN, > + .name = "Gain", > + .minimum = 0, > + .maximum = 6, > + .step = 1, > + .default_value = 3, > + .type = V4L2_CTRL_TYPE_INTEGER, > + .flags = V4L2_CTRL_FLAG_DISABLED, > },{ > .id = V4L2_CID_HFLIP, > .name = "Mirror", > @@ -1129,6 +1138,9 @@ > case V4L2_CID_HUE: > c->value = dev->ctl_hue; > break; > + case V4L2_CID_GAIN: > + c->value = dev->ctl_gain; > + break; > case V4L2_CID_CONTRAST: > c->value = dev->ctl_contrast; > break; > @@ -1214,6 +1226,10 @@ > case V4L2_CID_HUE: > dev->ctl_hue = c->value; > saa_writeb(SAA7134_DEC_CHROMA_HUE, dev->ctl_hue); > + break; > + case V4L2_CID_GAIN: > + dev->ctl_gain = c->value; > + > break; > case V4L2_CID_CONTRAST: > dev->ctl_contrast = c->value; > @@ -2502,6 +2518,7 @@ > dev->ctl_bright = ctrl_by_id(V4L2_CID_BRIGHTNESS)->default_value; > dev->ctl_contrast = ctrl_by_id(V4L2_CID_CONTRAST)->default_value; > dev->ctl_hue = ctrl_by_id(V4L2_CID_HUE)->default_value; > + dev->ctl_gain = ctrl_by_id(V4L2_CID_GAIN)->default_value; > dev->ctl_saturation = ctrl_by_id(V4L2_CID_SATURATION)->default_value; > dev->ctl_volume = ctrl_by_id(V4L2_CID_AUDIO_VOLUME)->default_value; > dev->ctl_mute = 1; // ctrl_by_id(V4L2_CID_AUDIO_MUTE)->default_value; > diff -r 43dbc8ebb5a2 linux/drivers/media/video/saa7134/saa7134.h > --- a/linux/drivers/media/video/saa7134/saa7134.h Tue Jan 27 23:47:50 2009 -0200 > +++ b/linux/drivers/media/video/saa7134/saa7134.h Tue Apr 21 09:44:38 2009 +1000 > @@ -548,6 +558,7 @@ > int ctl_bright; > int ctl_contrast; > int ctl_hue; > + int ctl_gain; /* gain */ > int ctl_saturation; > int ctl_freq; > int ctl_mute; /* audio */ > > > With my best regards, Dmitry. > > > Cheers, > > Hermann > > > > > With my best regards, Dmitry. > > > > > > > > > > > Cheers, > > > > Mauro. > > > > > > > > > > > > > > diff -r b40d628f830d > > > > > linux/drivers/media/common/tuners/tuner-types.c --- > > > > > a/linux/drivers/media/common/tuners/tuner-types.c Fri > > > > > Apr 24 01:46:41 2009 -0300 +++ > > > > > b/linux/drivers/media/common/tuners/tuner-types.c Tue > > > > > Apr 28 03:35:42 2009 +1000 @@ -558,8 +558,8 @@ static struct > > > > > tuner_range tuner_fm1216me_mk3_pal_ranges[] = { { 16 * > > > > > 158.00 /*MHz*/, 0x8e, 0x01, }, > > > > > - { 16 * 442.00 /*MHz*/, 0x8e, 0x02, }, > > > > > - { 16 * 999.99 , 0x8e, 0x04, }, > > > > > + { 16 * 441.00 /*MHz*/, 0x8e, 0x02, }, > > > > > + { 16 * 864.00 , 0x8e, 0x04, }, > > > > > }; > > > > > > > > > > static struct tuner_params tuner_fm1216me_mk3_params[] = { > > > > > > > > > > Signed-off-by: Beholder Intl. Ltd. Dmitry Belimov > > > > > <d.belimov@xxxxxxxxx> > > > > > > > > > > > > > > > With my best regards, Dmitry. > > > > > > > > > > > Hi Dmitri, > > > > > > > > > > > > Thank you for you responses. > > > > > > > > > > > > Just a few more comments... > > > > > > > > > > > > On Thu, 2009-04-23 at 20:36 +1000, Dmitri Belimov wrote: > > > > > > > Hi Andy > > > > > > > > > > > > > > > Dmitri, > > > > > > > > > > > > > > > > > > > > > > > > On Wed, 2009-04-22 at 17:48 +1000, Dmitri Belimov wrote: > > > > > > > > > Hi All > > > > > > > > > > > > > > > > > > 1. Change middle band. In the end of the middle band the > > > > > > > > > sensitivity of receiver not good. If we switch to higher > > > > > > > > > band, sensitivity more better. Hardware trick. > > > > > > > > > > > > > > > > > > > > > Several years a go your customers write some messages about > > > > > > > bad quality of TV if frequency of TV is the end of band. It > > > > > > > can be low band or middle. Our hardware engeneer make some > > > > > > > tests with hardware TV generator and our TV tuners. > > > > > > > > > > > > > > If we set default frequency range for low and middle band, > > > > > > > quality of TV signal on 159MHz and 442 MHz is bad. When we > > > > > > > make our changes with moving end of bands the quality of TV > > > > > > > much better. And our system programmer for OS Windows use > > > > > > > changed bands for drivers. Customers be happy. > > > > > > > > > > > > OK. A properly run experiment wins over theory every time. :) > > > > > > > > > > > > > > > > > > > > > > > > > You can test it if in your placement available TV programm > > > > > > > on 159MHz or 442MHz. This trick can be usefull for other > > > > > > > tuners. > > > > > > > > > > > > If you look at tveeprom.c, a number of other tuners are using > > > > > > that tuner definition: > > > > > > > > > > > > $ grep FM1216ME_MK3 tveeprom.c > > > > > > { TUNER_PHILIPS_FM1216ME_MK3, "Philips > > > > > > FQ1216ME MK3"}, { TUNER_PHILIPS_FM1216ME_MK3, > > > > > > "Philips FM1216 ME MK3"}, > > > > > > { TUNER_PHILIPS_FM1216ME_MK3, "LG S001D MK3"}, > > > > > > { TUNER_PHILIPS_FM1216ME_MK3, "LG S701D MK3"}, > > > > > > { TUNER_PHILIPS_FM1216ME_MK3, "Philips FQ1216LME > > > > > > MK3"}, { TUNER_PHILIPS_FM1216ME_MK3, "TCL MFPE05 2"}, > > > > > > { TUNER_PHILIPS_FM1216ME_MK3, "TCL MPE05-2"}, > > > > > > { TUNER_PHILIPS_FM1216ME_MK3, "Philips FM1216ME MK5"}, > > > > > > > > > > > > If your change makes things bad for the other tuners, we'll > > > > > > probably have to create an alternate entry for the other > > > > > > tuners instead of using the FM1216ME_MK3 defintion. I > > > > > > suspect most of them are clones of the FM1216ME MK3 however, > > > > > > so it probably won't matter. > > > > > > > > > > > > > > > 3. Set charge pump bit > > > > > > > > > > > > > > > > This will improve the time to initially tune to a > > > > > > > > frequency, but will likely add some noise as the PLL > > > > > > > > continues to maintain lock on the signal. If there is no > > > > > > > > way to turn off the CP after the lock bit is set in the > > > > > > > > tuner, it's probably better to leave it off for lower > > > > > > > > noise and just live with slower tuning. > > > > > > > > > > > > > > We discuss with our windows system programmer about it. He > > > > > > > sad that in analog TV mode noise from PLL don't give any > > > > > > > problem. > > > > > > > > > > > > I would be concerned about phase noise affecting the colors or > > > > > > any FM sound carriers. If the noise isn't noticably affecting > > > > > > colors to the human eye (do color bars look OK?), or sound to > > > > > > the human ear, then OK. > > > > > > > > > > > > > > > > > > > But in digital TV mode > > > > > > > noise from PLL decreased BER. > > > > > > > > > > > > I thought the FM1216ME MK3 was an analog only tuner. I guess > > > > > > I don't know DVB-T or cable in Europe well enough. > > > > > > > > > > > > > > > > > > > > Leaving the CP bit set should be especially noticable ad > > > > > > > > FM noise when set to tune to FM radio stations. From the > > > > > > > > FM1236ME_MK3 datasheet: "It is recommended to set CP=0 in > > > > > > > > the FM mode at all times." But the VHF low band control > > > > > > > > byte is also used when setting FM radio (AFAICT with a > > > > > > > > quick look at the code.) > > > > > > > > > > > > > > Yes. You are right. We can swith CP off in FM mode. > > > > > > > > > > > > OK. Thank you. > > > > > > > > > > > > > With my best regards, Dmitry. > > > > > > > > > > > > > > > > > > Regards, > > > > > > Andy > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Cheers, > > > > Mauro > > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
