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[media] tuner/xc2028: Add I2C flush callback 

When loading the firmware, complete each chunk by sending an I2C flush
command to the frontend. Some devices like the tm6000 seem to require
this to properly flush the I2C buffers.

The current code in tm6000 executes the flush command once after each
I2C transfer, which slows down the firmware loading especially when
loading large BASE type images.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
hifive-unleashed-5.1
Thierry Reding 2011-08-04 04:13:59 -03:00 committed by Mauro Carvalho Chehab
parent 69d232ae8e
commit 4d37ece757
2 changed files with 8 additions and 0 deletions
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7
drivers/media/common/tuners/tuner-xc2028.c
View File

@ -614,6 +614,13 @@ static int load_firmware(struct dvb_frontend *fe, unsigned int type,
p += len;
size -= len;
}
/* silently fail if the frontend doesn't support I2C flush */
rc = do_tuner_callback(fe, XC2028_I2C_FLUSH, 0);
if ((rc < 0) && (rc != -EINVAL)) {
tuner_err("error executing flush: %d\n", rc);
return rc;
}
}
return 0;
}

1
drivers/media/common/tuners/tuner-xc2028.h
View File

@ -54,6 +54,7 @@ struct xc2028_config {
/* xc2028 commands for callback */
#define XC2028_TUNER_RESET 0
#define XC2028_RESET_CLK 1
#define XC2028_I2C_FLUSH 2
#if defined(CONFIG_MEDIA_TUNER_XC2028) || (defined(CONFIG_MEDIA_TUNER_XC2028_MODULE) && defined(MODULE))
extern struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,