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Commit 4d37ece7 authored by Thierry Reding's avatar Thierry Reding Committed by Mauro Carvalho Chehab
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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: default avatarThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 69d232ae

drivers/media/common/tuners/tuner-xc2028.c

+7 −0
Original line number Diff line number Diff line
@@ -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;

}

drivers/media/common/tuners/tuner-xc2028.h

+1 −0
Original line number Diff line number Diff line
@@ -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,