Hello Hans Verkuil,
The patch 1f3375e0b257: "[media] tw9910: init priv->scale and update
standard" from Jun 15, 2015, leads to the following static checker
warning:
drivers/media/i2c/soc_camera/tw9910.c:536 tw9910_s_std()
warn: odd binop '0x0 & 0xc'
drivers/media/i2c/soc_camera/tw9910.c
509 static int tw9910_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
510 {
511 struct i2c_client *client = v4l2_get_subdevdata(sd);
512 struct tw9910_priv *priv = to_tw9910(client);
513 const unsigned hact = 720;
514 const unsigned hdelay = 15;
^^^^^^^^^^^
515 unsigned vact;
516 unsigned vdelay;
517 int ret;
518
519 if (!(norm & (V4L2_STD_NTSC | V4L2_STD_PAL)))
520 return -EINVAL;
521
522 priv->norm = norm;
523 if (norm & V4L2_STD_525_60) {
524 vact = 240;
525 vdelay = 18;
526 ret = tw9910_mask_set(client, VVBI, 0x10, 0x10);
527 } else {
528 vact = 288;
529 vdelay = 24;
530 ret = tw9910_mask_set(client, VVBI, 0x10, 0x00);
531 }
532 if (!ret)
533 ret = i2c_smbus_write_byte_data(client, CROP_HI,
534 ((vdelay >> 2) & 0xc0) |
535 ((vact >> 4) & 0x30) |
536 ((hdelay >> 6) & 0x0c) |
15 >> 6 is zero. It's not clear what was intended or why I'm only
seeing this warning now.
537 ((hact >> 8) & 0x03));
538 if (!ret)
539 ret = i2c_smbus_write_byte_data(client, VDELAY_LO,
540 vdelay & 0xff);
541 if (!ret)
542 ret = i2c_smbus_write_byte_data(client, VACTIVE_LO,
543 vact & 0xff);
544
545 return ret;
546 }
regards,
dan carpenter
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