+ath11k list
On Mon, Sep 21, 2020 at 09:43:03AM +0200, Loic Poulain wrote:
> There is really no point having an auto-start for channels.
> This is confusing for the device drivers, some have to enable the
> channels, others don't have... and waste resources (e.g. pre allocated
> buffers) that may never be used.
>
> This is really up to the MHI device(channel) driver to manage the state
> of its channels.
>
> Signed-off-by: Loic Poulain <loic.poul...@linaro.org>
Applied to mhi-ath11k-immutable branch! This branch will get merged into
mhi-next and ath-next.
Thanks,
Mani
> ---
> v2: split MHI and qrtr changes in dedicated commits
>
> drivers/bus/mhi/core/init.c | 9 ---------
> drivers/bus/mhi/core/internal.h | 1 -
> include/linux/mhi.h | 2 --
> 3 files changed, 12 deletions(-)
>
> diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
> index dccc824..8798deb 100644
> --- a/drivers/bus/mhi/core/init.c
> +++ b/drivers/bus/mhi/core/init.c
> @@ -721,7 +721,6 @@ static int parse_ch_cfg(struct mhi_controller *mhi_cntrl,
> mhi_chan->offload_ch = ch_cfg->offload_channel;
> mhi_chan->db_cfg.reset_req = ch_cfg->doorbell_mode_switch;
> mhi_chan->pre_alloc = ch_cfg->auto_queue;
> - mhi_chan->auto_start = ch_cfg->auto_start;
>
> /*
> * If MHI host allocates buffers, then the channel direction
> @@ -1119,11 +1118,6 @@ static int mhi_driver_probe(struct device *dev)
> goto exit_probe;
>
> ul_chan->xfer_cb = mhi_drv->ul_xfer_cb;
> - if (ul_chan->auto_start) {
> - ret = mhi_prepare_channel(mhi_cntrl, ul_chan);
> - if (ret)
> - goto exit_probe;
> - }
> }
>
> ret = -EINVAL;
> @@ -1157,9 +1151,6 @@ static int mhi_driver_probe(struct device *dev)
> if (ret)
> goto exit_probe;
>
> - if (dl_chan && dl_chan->auto_start)
> - mhi_prepare_channel(mhi_cntrl, dl_chan);
> -
> mhi_device_put(mhi_dev);
>
> return ret;
> diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h
> index 5a81a42..73b52a0 100644
> --- a/drivers/bus/mhi/core/internal.h
> +++ b/drivers/bus/mhi/core/internal.h
> @@ -563,7 +563,6 @@ struct mhi_chan {
> bool configured;
> bool offload_ch;
> bool pre_alloc;
> - bool auto_start;
> bool wake_capable;
> };
>
> diff --git a/include/linux/mhi.h b/include/linux/mhi.h
> index 811e686..0d277c7 100644
> --- a/include/linux/mhi.h
> +++ b/include/linux/mhi.h
> @@ -214,7 +214,6 @@ enum mhi_db_brst_mode {
> * @offload_channel: The client manages the channel completely
> * @doorbell_mode_switch: Channel switches to doorbell mode on M0 transition
> * @auto_queue: Framework will automatically queue buffers for DL traffic
> - * @auto_start: Automatically start (open) this channel
> * @wake-capable: Channel capable of waking up the system
> */
> struct mhi_channel_config {
> @@ -232,7 +231,6 @@ struct mhi_channel_config {
> bool offload_channel;
> bool doorbell_mode_switch;
> bool auto_queue;
> - bool auto_start;
> bool wake_capable;
> };
>
> --
> 2.7.4
>
