On Thu, Dec 11, 2025 at 01:37:38PM +0530, Sivareddy Surasani wrote:
> From: Vivek Pernamitta <vivek.pernamitta@oss.qualcomm.com>
>
> Add overflow disable flag for QDU100 H/W channels.
>
Add some context on why the channel require this flag and how it is used.
- Mani
> Signed-off-by: Vivek Pernamitta <vivek.pernamitta@oss.qualcomm.com>
> Signed-off-by: Sivareddy Surasani <sivareddy.surasani@oss.qualcomm.com>
> ---
> drivers/bus/mhi/host/pci_generic.c | 20 ++++++++++++++++++--
> 1 file changed, 18 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
> index bb3c5350a462..814f8fdae378 100644
> --- a/drivers/bus/mhi/host/pci_generic.c
> +++ b/drivers/bus/mhi/host/pci_generic.c
> @@ -94,6 +94,22 @@ struct mhi_pci_dev_info {
> .doorbell_mode_switch = false, \
> }
>
> +#define MHI_CHANNEL_CONFIG_DL_OVF_DISABLE(ch_num, ch_name, el_count, ev_ring) \
> + { \
> + .num = ch_num, \
> + .name = ch_name, \
> + .num_elements = el_count, \
> + .event_ring = ev_ring, \
> + .dir = DMA_FROM_DEVICE, \
> + .ee_mask = BIT(MHI_EE_AMSS), \
> + .pollcfg = 0, \
> + .ovf_disable = true, \
> + .doorbell = MHI_DB_BRST_DISABLE, \
> + .lpm_notify = false, \
> + .offload_channel = false, \
> + .doorbell_mode_switch = false, \
> + }
> +
> #define MHI_CHANNEL_CONFIG_DL_AUTOQUEUE(ch_num, ch_name, el_count, ev_ring) \
> { \
> .num = ch_num, \
> @@ -295,9 +311,9 @@ static const struct mhi_channel_config mhi_qcom_qdu100_channels[] = {
> static const struct mhi_channel_config mhi_qcom_qdu100_vf_channels[] = {
> /* HW channels */
> MHI_CHANNEL_CONFIG_UL(104, "IP_HW1", 2048, 1),
> - MHI_CHANNEL_CONFIG_DL(105, "IP_HW1", 2048, 2),
> + MHI_CHANNEL_CONFIG_DL_OVF_DISABLE(105, "IP_HW1", 2048, 2),
> MHI_CHANNEL_CONFIG_UL(106, "IP_HW2", 2048, 3),
> - MHI_CHANNEL_CONFIG_DL(107, "IP_HW2", 2048, 4),
> + MHI_CHANNEL_CONFIG_DL_OVF_DISABLE(107, "IP_HW2", 2048, 4),
> };
>
> static struct mhi_event_config mhi_qcom_qdu100_events[] = {
>
> --
> 2.34.1
>
--
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