Kernel/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-19 11:43:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

V4L/DVB (13329): s5h1409: provide HVR-1600 specific optimizations

Browse Source 
Perform some optimization of the register configuration based on a trace
of the HVR-1600 Windows i2c traffic (and consultation with Steven Toth).
Note that some of these values may be able to be moved into the common driver,
but I am holding off on that until they can be tested with other boards.

This work was sponsored by ONELAN Limited.

Cc: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Devin Heitmueller 2009-10-27 23:33:21 -03:00 committed by Mauro Carvalho Chehab
parent f57b17c395
commit af5c8e1523
3 changed files with 24 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/media/dvb/frontends/s5h1409.c
View File

@ -614,6 +614,21 @@ static int s5h1409_init(struct dvb_frontend *fe)
/* The datasheet says that after initialisation, VSB is default */ /* The datasheet says that after initialisation, VSB is default */
state->current_modulation = VSB_8; state->current_modulation = VSB_8;
/* Optimize for the HVR-1600 if appropriate. Note that some of these
may get folded into the generic case after testing with other
devices */
if (state->config->hvr1600_opt == S5H1409_HVR1600_OPTIMIZE) {
/* VSB AGC REF */
s5h1409_writereg(state, 0x09, 0x0050);
/* Unknown but Windows driver does it... */
s5h1409_writereg(state, 0x21, 0x0001);
s5h1409_writereg(state, 0x50, 0x030e);
/* QAM AGC REF */
s5h1409_writereg(state, 0x82, 0x0800);
}
if (state->config->output_mode == S5H1409_SERIAL_OUTPUT) if (state->config->output_mode == S5H1409_SERIAL_OUTPUT)
s5h1409_writereg(state, 0xab, s5h1409_writereg(state, 0xab,
s5h1409_readreg(state, 0xab) | 0x100); /* Serial */ s5h1409_readreg(state, 0xab) | 0x100); /* Serial */

7
drivers/media/dvb/frontends/s5h1409.h
View File

@ -57,6 +57,13 @@ struct s5h1409_config {
#define S5H1409_MPEGTIMING_NONCONTINOUS_INVERTING_CLOCK 2 #define S5H1409_MPEGTIMING_NONCONTINOUS_INVERTING_CLOCK 2
#define S5H1409_MPEGTIMING_NONCONTINOUS_NONINVERTING_CLOCK 3 #define S5H1409_MPEGTIMING_NONCONTINOUS_NONINVERTING_CLOCK 3
u16 mpeg_timing; u16 mpeg_timing;
/* HVR-1600 optimizations (to better work with MXL5005s)
Note: some of these are likely to be folded into the generic driver
after being regression tested with other boards */
#define S5H1409_HVR1600_NOOPTIMIZE 0
#define S5H1409_HVR1600_OPTIMIZE 1
u8 hvr1600_opt;
}; };
#if defined(CONFIG_DVB_S5H1409) || (defined(CONFIG_DVB_S5H1409_MODULE) \ #if defined(CONFIG_DVB_S5H1409) || (defined(CONFIG_DVB_S5H1409_MODULE) \

3
drivers/media/video/cx18/cx18-dvb.c
View File

@ -71,7 +71,8 @@ static struct s5h1409_config hauppauge_hvr1600_config = {
.qam_if = 44000, .qam_if = 44000,
.inversion = S5H1409_INVERSION_OFF, .inversion = S5H1409_INVERSION_OFF,
.status_mode = S5H1409_DEMODLOCKING, .status_mode = S5H1409_DEMODLOCKING,
.mpeg_timing = S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK .mpeg_timing = S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK,
.hvr1600_opt = S5H1409_HVR1600_OPTIMIZE
}; };
/* /*