Hi Jacob,
On Thu, Mar 08, 2018 at 05:47:55PM +0800, Jacob Chen wrote:
> +static int rkisp1_isp_sd_s_power(struct v4l2_subdev *sd, int on)
> +{
> + struct rkisp1_device *isp_dev = sd_to_isp_dev(sd);
> + int ret;
> +
> + v4l2_dbg(1, rkisp1_debug, &isp_dev->v4l2_dev, "s_power: %d\n", on);
> +
> + if (on) {
> + ret = pm_runtime_get_sync(isp_dev->dev);
> + if (ret < 0)
> + return ret;
> +
> + rkisp1_config_clk(isp_dev);
> + } else {
> + ret = pm_runtime_put(isp_dev->dev);
I commented this line out to make more than one STREAMON work. Otherwise, the
second STREAMON hangs. I guess the bug is not this driver. Probably something
in drivers/soc/rockchip/pm_domains.c. Just noting that in case you or someone
on Cc would like to investigate it further.
I tested v4.16-rc4 on the Tinkerboard.
baruch
> + if (ret < 0)
> + return ret;
> + }
> +
> + return 0;
> +}
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