From ac8b63b30a320699e602a18af6101528b408d41d Mon Sep 17 00:00:00 2001 From: Michael Krufky Date: Tue, 22 Apr 2008 14:45:51 -0300 Subject: [PATCH] V4L/DVB (7346): tda9887: allow multiple driver instances for the same hardware to share state Convert tda9887 to use the new hybrid_tuner_request_state and hybrid_tuner_release_state macros to manage state sharing between hybrid tuner instances. Some ATSC/DVB cards need to put the analog demodulator into standby before tuning digital. This patch allows us to attach the tda9887 driver to the digital side of the bridge driver and be able to put it into standby without jeopardizing the analog demod driver's state. Signed-off-by: Michael Krufky Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/tda9887.c | 43 +++++++++++++++++++++++++++-------- 1 file changed, 33 insertions(+), 10 deletions(-) diff --git a/drivers/media/video/tda9887.c b/drivers/media/video/tda9887.c index 75d08404d238..a0545ba957b0 100644 --- a/drivers/media/video/tda9887.c +++ b/drivers/media/video/tda9887.c @@ -25,8 +25,12 @@ static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "enable verbose debug messages"); +static DEFINE_MUTEX(tda9887_list_mutex); +static LIST_HEAD(hybrid_tuner_instance_list); + struct tda9887_priv { struct tuner_i2c_props i2c_props; + struct list_head hybrid_tuner_instance_list; unsigned char data[4]; unsigned int config; @@ -642,7 +646,15 @@ static int tda9887_set_config(struct dvb_frontend *fe, void *priv_cfg) static void tda9887_release(struct dvb_frontend *fe) { - kfree(fe->analog_demod_priv); + struct tda9887_priv *priv = fe->analog_demod_priv; + + mutex_lock(&tda9887_list_mutex); + + if (priv) + hybrid_tuner_release_state(priv); + + mutex_unlock(&tda9887_list_mutex); + fe->analog_demod_priv = NULL; } @@ -663,18 +675,29 @@ struct dvb_frontend *tda9887_attach(struct dvb_frontend *fe, u8 i2c_addr) { struct tda9887_priv *priv = NULL; + int instance; - priv = kzalloc(sizeof(struct tda9887_priv), GFP_KERNEL); - if (priv == NULL) - return NULL; - fe->analog_demod_priv = priv; + mutex_lock(&tda9887_list_mutex); - priv->i2c_props.addr = i2c_addr; - priv->i2c_props.adap = i2c_adap; - priv->i2c_props.name = "tda9887"; - priv->mode = T_STANDBY; + instance = hybrid_tuner_request_state(struct tda9887_priv, priv, + hybrid_tuner_instance_list, + i2c_adap, i2c_addr, "tda9887"); + switch (instance) { + case 0: + mutex_unlock(&tda9887_list_mutex); + return NULL; + break; + case 1: + fe->analog_demod_priv = priv; + priv->mode = T_STANDBY; + tuner_info("tda988[5/6/7] found\n"); + break; + default: + fe->analog_demod_priv = priv; + break; + } - tuner_info("tda988[5/6/7] found\n"); + mutex_unlock(&tda9887_list_mutex); memcpy(&fe->ops.analog_ops, &tda9887_ops, sizeof(struct analog_demod_ops)); -- GitLab