linux-kernel - Re: [PATCH v2] mailbox: qcom-ipcc: Reset CLEAR_ON_RECV

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Message-ID: <Z43uJHn7Yhm3k3XV@hu-mojha-hyd.qualcomm.com>
Date: Mon, 20 Jan 2025 12:03:08 +0530
From: Mukesh Ojha <mukesh.ojha@....qualcomm.com>
To: manivannan.sadhasivam@...aro.org, jassisinghbrar@...il.com,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mailbox: qcom-ipcc: Reset CLEAR_ON_RECV_RD if set
 from boot firmware

On Mon, Dec 30, 2024 at 01:24:25PM +0530, Mukesh Ojha wrote:
> For some SoCs, boot firmware is using the same IPCC instance used
> by Linux and it has kept CLEAR_ON_RECV_RD set which basically means
> interrupt pending registers are cleared when RECV_ID is read and the
> register automatically updates to the next pending interrupt/client
> status based on priority.
> 
> Clear the CLEAR_ON_RECV_RD if it is set from the boot firmware.
> 
> Signed-off-by: Mukesh Ojha <mukesh.ojha@....qualcomm.com>

Resurfacing this in case it was missed during the New Year vacation period.

-Mukesh