linux-kernel - Re: [PATCH V2 0/6] remoteproc: imx

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Date:   Fri, 3 Feb 2023 14:49:49 +0200
From:   Daniel Baluta <daniel.baluta@...il.com>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc:     andersson@...nel.org, mathieu.poirier@...aro.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de,
        arnaud.pouliquen@...s.st.com, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com,
        linux-remoteproc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Peng Fan <peng.fan@....com>
Subject: Re: [PATCH V2 0/6] remoteproc: imx_rproc: support firmware in DDR

On Fri, Jan 27, 2023 at 11:26 AM Peng Fan (OSS) <peng.fan@....nxp.com> wrote:
>
> From: Peng Fan <peng.fan@....com>
>
> V2:
>  patch 4 is introduced for sparse check warning fix
>
> This pachset is to support i.MX8M and i.MX93 Cortex-M core firmware could
> be in DDR, not just the default TCM.
>
> i.MX8M needs stack/pc value be stored in TCML entry address[0,4], the
> initial value could be got from firmware first section ".interrupts".
> i.MX93 is a bit different, it just needs the address of .interrupts
> section. NXP SDK always has .interrupts section.
>
> So first we need find the .interrupts section from firmware, so patch 1
> is to reuse the code of find_table to introduce a new API
> rproc_elf_find_shdr to find shdr, the it could reused by i.MX driver.
>
> Patch 2 is introduce devtype for i.MX8M/93
>
> Although patch 3 is correct the mapping, but this area was never used
> by NXP SW team, we directly use the DDR region, not the alias region.
> Since this patchset is first to support firmware in DDR, mark this patch
> as a fix does not make much sense.
>
> patch 4 and 5 is support i.MX8M/93 firmware in DDR with parsing .interrupts
> section. Detailed information in each patch commit message.
>
> Patches were tested on i.MX8MQ-EVK i.MX8MP-EVK i.MX93-11x11-EVK

Hi Peng,

Few observations:

- bugfixes should come first in the series.
- in case we want to patches to be pushed back into stable releases
please add "Fixes: " tag.