From: Brad Love <brad@nextdimension.cc>
To: linux-media@vger.kernel.org
Cc: Brad Love <brad@nextdimension.cc>
Subject: [PATCH v2 03/12] si2157: Better check for running tuner in init
Date: Wed, 27 Feb 2019 12:27:37 -0600 [thread overview]
Message-ID: <1551292066-29574-4-git-send-email-brad@nextdimension.cc> (raw)
In-Reply-To: <1551292066-29574-1-git-send-email-brad@nextdimension.cc>
Getting the Xtal trim property to check if running is less error prone.
Reset if_frequency if state is unknown.
Replaces the previous "garbage check".
Signed-off-by: Brad Love <brad@nextdimension.cc>
---
No changes
drivers/media/tuners/si2157.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
index 3924c42..f3a60a1 100644
--- a/drivers/media/tuners/si2157.c
+++ b/drivers/media/tuners/si2157.c
@@ -90,24 +90,23 @@ static int si2157_init(struct dvb_frontend *fe)
struct si2157_cmd cmd;
const struct firmware *fw;
const char *fw_name;
- unsigned int uitmp, chip_id;
+ unsigned int chip_id, xtal_trim;
dev_dbg(&client->dev, "\n");
- /* Returned IF frequency is garbage when firmware is not running */
- memcpy(cmd.args, "\x15\x00\x06\x07", 4);
+ /* Try to get Xtal trim property, to verify tuner still running */
+ memcpy(cmd.args, "\x15\x00\x04\x02", 4);
cmd.wlen = 4;
cmd.rlen = 4;
ret = si2157_cmd_execute(client, &cmd);
- if (ret)
- goto err;
- uitmp = cmd.args[2] << 0 | cmd.args[3] << 8;
- dev_dbg(&client->dev, "if_frequency kHz=%u\n", uitmp);
+ xtal_trim = cmd.args[2] | (cmd.args[3] << 8);
- if (uitmp == dev->if_frequency / 1000)
+ if ((ret == 0) && (xtal_trim < 16))
goto warm;
+ dev->if_frequency = 0; /* we no longer know current tuner state */
+
/* power up */
if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
--
2.7.4
next prev parent reply other threads:[~2019-02-27 18:28 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-29 17:51 [PATCH 00/13] si2157: Analog tuning and optimizations Brad Love
2018-12-29 17:51 ` [PATCH 01/13] si2157: Enable tuner status flags Brad Love
2018-12-29 17:51 ` [PATCH 02/13] si2157: Check error status bit on cmd execute Brad Love
2019-01-09 18:01 ` Antti Palosaari
2019-01-15 17:28 ` Brad Love
2018-12-29 17:51 ` [PATCH 03/13] si2157: Better check for running tuner in init Brad Love
2018-12-29 17:51 ` [PATCH 04/13] si2157: Add clock and pin setup for si2141 Brad Love
2019-01-20 17:17 ` Antti Palosaari
2019-01-22 17:10 ` Brad Love
2018-12-29 17:51 ` [PATCH 05/13] cx25840: Register labeling, chip specific correction Brad Love
2018-12-29 17:51 ` [PATCH 06/13] si2157: Add analog tuning related functions Brad Love
2018-12-29 17:51 ` [PATCH 07/13] si2157: Briefly wait for tuning operation to complete Brad Love
2019-04-05 10:29 ` Sean Young
2019-04-08 18:14 ` Brad Love
2019-04-08 20:55 ` Sean Young
2019-04-08 21:37 ` Brad Love
2019-04-10 14:48 ` Brad Love
2018-12-29 17:51 ` [PATCH 08/13] cx23885: Add analog tuner support to Hauppauge QuadHD Brad Love
2018-12-29 17:51 ` [PATCH 09/13] cx23885: Add analog tuner to 1265_K4 Brad Love
2018-12-29 17:51 ` [PATCH 11/13] cx23885: Add i2c device analog tuner support Brad Love
2018-12-29 17:51 ` [PATCH 10/13] cx231xx: " Brad Love
2018-12-29 17:51 ` [PATCH 12/13] si2157: add on-demand rf strength func Brad Love
2019-01-20 19:09 ` Antti Palosaari
2018-12-29 17:51 ` [PATCH 13/13] lgdt3306a: Add CNR v5 stat Brad Love
2019-02-27 18:27 ` [PATCH v2 00/13] si2157: Analog tuning and optimizations Brad Love
2019-02-27 18:27 ` [PATCH v2 01/12] si2157: Enable tuner status flags Brad Love
2019-02-27 18:27 ` [PATCH v2 02/12] si2157: Check error status bit on cmd execute Brad Love
2019-02-27 18:27 ` Brad Love [this message]
2019-02-27 18:27 ` [PATCH v2 04/12] cx25840: Register labeling, chip specific correction Brad Love
2019-02-27 18:27 ` [PATCH v2 05/12] si2157: Add analog tuning related functions Brad Love
2019-04-05 13:24 ` Sean Young
2019-04-08 18:18 ` Brad Love
2019-02-27 18:27 ` [PATCH v2 06/12] si2157: Briefly wait for tuning operation to complete Brad Love
2019-02-27 18:27 ` [PATCH v2 07/12] cx23885: Add analog tuner support to Hauppauge QuadHD Brad Love
2019-02-27 18:27 ` [PATCH v2 08/12] cx23885: Add analog frontend to 1265_K4 Brad Love
2019-02-27 18:27 ` [PATCH v2 09/12] cx23885: Add i2c device analog tuner support Brad Love
2019-02-27 18:27 ` [PATCH v2 10/12] cx231xx: " Brad Love
2019-02-27 18:27 ` [PATCH v2 11/12] si2157: add on-demand rf strength func Brad Love
2019-02-27 18:27 ` [PATCH v2 12/12] lgdt3306a: Add CNR v5 stat Brad Love
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