Re: [PATCH 7/8] bus: mhi: pci_generic: Apply no-op for wake using sideband wake boolean

Greg KH
2021-06-24T13:54:14Z

On Mon, Jun 21, 2021 at 09:46:15PM +0530, Manivannan Sadhasivam wrote:
> From: Bhaumik Bhatt <bbhatt@codeaurora.org>
>
> Devices such as SDX24 do not have the provision for inband wake
> doorbell in the form of channel 127 and instead have a sideband
> GPIO for it. Newer devices such as SDX55 or SDX65 support inband
> wake method by default. Ensure the functionality is used based on
> this such that device wake stays held when a client driver uses
> mhi_device_get() API or the equivalent debugfs entry.
>
> Cc: stable@vger.kernel.org
> Fixes: e3e5e6508fc1 ("bus: mhi: pci_generic: No-Op for device_wake operations")
> Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> Link: https://lore.kernel.org/r/1624053302-22470-1-git-send-email-bbhatt@codeaurora.org
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
> drivers/bus/mhi/pci_generic.c | 27 +++++++++++++++++++--------
> 1 file changed, 19 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c
> index d84b74396c6a..eb9263bd1bd8 100644
> --- a/drivers/bus/mhi/pci_generic.c
> +++ b/drivers/bus/mhi/pci_generic.c
> @@ -32,6 +32,8 @@
> * @edl: emergency download mode firmware path (if any)
> * @bar_num: PCI base address register to use for MHI MMIO register space
> * @dma_data_width: DMA transfer word size (32 or 64 bits)
> + * @sideband_wake: Devices using dedicated sideband GPIO for wakeup instead
> + * of inband wake support (such as sdx24)
> */
> struct mhi_pci_dev_info {
> const struct mhi_controller_config *config;
> @@ -40,6 +42,7 @@ struct mhi_pci_dev_info {
> const char *edl;
> unsigned int bar_num;
> unsigned int dma_data_width;
> + bool sideband_wake;
> };
>
> #define MHI_CHANNEL_CONFIG_UL(ch_num, ch_name, el_count, ev_ring) \
> @@ -242,7 +245,8 @@ static const struct mhi_pci_dev_info mhi_qcom_sdx65_info = {
> .edl = "qcom/sdx65m/edl.mbn",
> .config = &modem_qcom_v1_mhiv_config,
> .bar_num = MHI_PCI_DEFAULT_BAR_NUM,
> - .dma_data_width = 32
> + .dma_data_width = 32,
> + .sideband_wake = false

Please put a trailing , here and for the other definitions, so in the
future you will not have to modify the previous line, like you had to do
here.

thanks,

greg k-h