mirror of https://gitee.com/openkylin/linux.git
[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>
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@ -614,6 +614,13 @@ static int load_firmware(struct dvb_frontend *fe, unsigned int type,
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p += len;
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p += len;
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size -= len;
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size -= len;
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}
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}
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/* silently fail if the frontend doesn't support I2C flush */
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rc = do_tuner_callback(fe, XC2028_I2C_FLUSH, 0);
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if ((rc < 0) && (rc != -EINVAL)) {
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tuner_err("error executing flush: %d\n", rc);
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return rc;
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}
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}
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}
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return 0;
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return 0;
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}
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}
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@ -54,6 +54,7 @@ struct xc2028_config {
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/* xc2028 commands for callback */
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/* xc2028 commands for callback */
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#define XC2028_TUNER_RESET 0
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#define XC2028_TUNER_RESET 0
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#define XC2028_RESET_CLK 1
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#define XC2028_RESET_CLK 1
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#define XC2028_I2C_FLUSH 2
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#if defined(CONFIG_MEDIA_TUNER_XC2028) || (defined(CONFIG_MEDIA_TUNER_XC2028_MODULE) && defined(MODULE))
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#if defined(CONFIG_MEDIA_TUNER_XC2028) || (defined(CONFIG_MEDIA_TUNER_XC2028_MODULE) && defined(MODULE))
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extern struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,
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extern struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,
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