Em 22-10-2010 07:21, Jiri Slaby escreveu:
> On 10/21/2010 07:51 PM, Jiri Slaby wrote:
>> On 10/21/2010 12:01 AM, akpm@xxxxxxxxxxxxxxxxxxxx wrote:
>>> The mm-of-the-moment snapshot 2010-10-20-15-01 has been uploaded to
>>
>> Well, this release happens to be a multimedia failure :(.
>>
>> I hit another regression against mmotm 2010-10-13-17-13, where
>> 0413:6029 (DVB USB tuner) can't be inited when plugged in. Even lsusb
>> waits inifitely.
>
> Revert of this commit helps:
Ah, the problem is here (drivers/media/dvb/dvb-usb/af9015.c):
static struct tda18271_config af9015_tda18271_config = {
.gate = TDA18271_GATE_DIGITAL,
.small_i2c = 1,
};
small_i2c is an enum, currently defined as:
enum tda18271_small_i2c {
TDA18271_39_BYTE_CHUNK_INIT = 0,
TDA18271_16_BYTE_CHUNK_INIT = 16,
TDA18271_08_BYTE_CHUNK_INIT = 8,
TDA18271_03_BYTE_CHUNK_INIT = 3,
};
The value is just a magic number, but having it associated with the max
I2C size makes more sense than a random value.
The value, before the patch was:
enum tda18271_small_i2c {
TDA18271_39_BYTE_CHUNK_INIT = 0,
TDA18271_16_BYTE_CHUNK_INIT = 1,
TDA18271_08_BYTE_CHUNK_INIT = 2,
};
So, it seems that the max I2C size for af9015 is 16 bytes. The proper init
should be:
.small_i2c = TDA18271_16_BYTE_CHUNK_INIT;
Please check if the enclosed patch fixes the issue.
Thanks,
Mauro
---
[media] af9015: Properly initialize tda18271.small_i2c
As reported by Jiri, a regression at mm series is happening on af9015:
tda18271 18-00c0: creating new instance
TDA18271HD/C2 detected @ 18-00c0
af9015: command failed:1
tda18271_write_regs: [18-00c0|M] ERROR: idx = 0x0, len = 39,
i2c_transfer returned: -1
af9015: command failed:1
The cause is that tda18271.small_i2c is an enum. Drivers should use the value
alias, instead of its number, as the "magic" number may change anytime.
Reported-by: Jiri Slaby <jirislaby@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
diff --git a/drivers/media/dvb/dvb-usb/af9015.c b/drivers/media/dvb/dvb-usb/af9015.c
index 759cbf8..f5e4066 100644
--- a/drivers/media/dvb/dvb-usb/af9015.c
+++ b/drivers/media/dvb/dvb-usb/af9015.c
@@ -1144,7 +1144,7 @@ static struct qt1010_config af9015_qt1010_config = {
static struct tda18271_config af9015_tda18271_config = {
.gate = TDA18271_GATE_DIGITAL,
- .small_i2c = 1,
+ .small_i2c = TDA18271_16_BYTE_CHUNK_INIT;,
};
static struct mxl5005s_config af9015_mxl5003_config = {
--
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