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From: "Peng Fan (OSS)" <peng.fan@oss.nxp.com>
To: bjorn.andersson@linaro.org, mathieu.poirier@linaro.org,
	shawnguo@kernel.org, s.hauer@pengutronix.de,
	kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
	linux-remoteproc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, robh+dt@kernel.org,
	krzysztof.kozlowski+dt@linaro.org
Cc: devicetree@vger.kernel.org, Peng Fan <peng.fan@nxp.com>
Subject: [PATCH 0/2] remoteproc: imx: add start up delay
Date: Thu,  9 Jun 2022 20:34:58 +0800	[thread overview]
Message-ID: <20220609123500.3492475-1-peng.fan@oss.nxp.com> (raw)

From: Peng Fan <peng.fan@nxp.com>

There is case that after remoteproc start remote processor[M4], the M4
runs slow and before M4 finish its own rpmsg framework initialization,
linux sends out vring kick message, then M4 firmware drops the kick
message. Some NXP released Cortex-M[x] images has such limitation that
it requires linux sends out vring kick message after M4 firmware finish
its rpmsg framework initialization.

The best case is to use a method to let M4 notify Linux that M4 has
finished initialization, but we could not patch released firmware,
then update driver to detect notification. 

So add delay before linux send out vring kick message. It is not good to
use a fixed time delay in driver, so I choose to get that from device
tree.

Peng Fan (2):
  dt-bindings: remoteproc: imx_rproc: add fsl,startup-delay-ms
  remoteproc: imx_rproc: delay after kick remote processor

 .../devicetree/bindings/remoteproc/fsl,imx-rproc.yaml    | 4 ++++
 drivers/remoteproc/imx_rproc.c                           | 9 +++++++++
 2 files changed, 13 insertions(+)

-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: "Peng Fan (OSS)" <peng.fan@oss.nxp.com>
To: bjorn.andersson@linaro.org, mathieu.poirier@linaro.org,
	shawnguo@kernel.org, s.hauer@pengutronix.de,
	kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
	linux-remoteproc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, robh+dt@kernel.org,
	krzysztof.kozlowski+dt@linaro.org
Cc: devicetree@vger.kernel.org, Peng Fan <peng.fan@nxp.com>
Subject: [PATCH 0/2] remoteproc: imx: add start up delay
Date: Thu,  9 Jun 2022 20:34:58 +0800	[thread overview]
Message-ID: <20220609123500.3492475-1-peng.fan@oss.nxp.com> (raw)

From: Peng Fan <peng.fan@nxp.com>

There is case that after remoteproc start remote processor[M4], the M4
runs slow and before M4 finish its own rpmsg framework initialization,
linux sends out vring kick message, then M4 firmware drops the kick
message. Some NXP released Cortex-M[x] images has such limitation that
it requires linux sends out vring kick message after M4 firmware finish
its rpmsg framework initialization.

The best case is to use a method to let M4 notify Linux that M4 has
finished initialization, but we could not patch released firmware,
then update driver to detect notification. 

So add delay before linux send out vring kick message. It is not good to
use a fixed time delay in driver, so I choose to get that from device
tree.

Peng Fan (2):
  dt-bindings: remoteproc: imx_rproc: add fsl,startup-delay-ms
  remoteproc: imx_rproc: delay after kick remote processor

 .../devicetree/bindings/remoteproc/fsl,imx-rproc.yaml    | 4 ++++
 drivers/remoteproc/imx_rproc.c                           | 9 +++++++++
 2 files changed, 13 insertions(+)

-- 
2.25.1


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             reply	other threads:[~2022-06-09 12:33 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-09 12:34 Peng Fan (OSS) [this message]
2022-06-09 12:34 ` [PATCH 0/2] remoteproc: imx: add start up delay Peng Fan (OSS)
2022-06-09 12:34 ` [PATCH 1/2] dt-bindings: remoteproc: imx_rproc: add fsl,startup-delay-ms Peng Fan (OSS)
2022-06-09 12:34   ` Peng Fan (OSS)
2022-06-09 15:23   ` Rob Herring
2022-06-09 15:23     ` Rob Herring
2022-06-10  2:10     ` Peng Fan
2022-06-10  2:10       ` Peng Fan
2022-06-09 12:35 ` [PATCH 2/2] remoteproc: imx_rproc: delay after kick remote processor Peng Fan (OSS)
2022-06-09 12:35   ` Peng Fan (OSS)

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