From: Lee Jones <lee.jones@linaro.org>
To: Wolfram Sang <wsa@the-dreams.de>
Cc: alokc@codeaurora.org, agross@kernel.org, robh+dt@kernel.org,
mark.rutland@arm.com, bjorn.andersson@linaro.org,
linux-i2c@vger.kernel.org, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, vkoul@kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] i2c: qcom-geni: Provide an option to disable DMA processing
Date: Thu, 5 Sep 2019 10:28:16 +0100 [thread overview]
Message-ID: <20190905092816.GD26880@dell> (raw)
In-Reply-To: <20190905091800.GD1157@kunai>
On Thu, 05 Sep 2019, Wolfram Sang wrote:
>
> > Fixes: 8bc529b25354 ("soc: qcom: geni: Add support for ACPI")
>
> Are you sure? From visual inspection, I don't see a correlation between
> this commit and the fix here.
This patch should have been part of the commit, or at the very least,
part of the set, alluded to above. Unfortunately, I was carrying
Bjorn's hack which simply returned early from geni_se_rx_dma_prep()
with an error, so it masked the issue.
> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > Reviewed-by: Vinod Koul <vkoul@kernel.org>
> > ---
> > drivers/i2c/busses/i2c-qcom-geni.c | 14 ++++++++++----
> > 1 file changed, 10 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
> > index a89bfce5388e..8822dea82980 100644
> > --- a/drivers/i2c/busses/i2c-qcom-geni.c
> > +++ b/drivers/i2c/busses/i2c-qcom-geni.c
> > @@ -353,13 +353,16 @@ static void geni_i2c_tx_fsm_rst(struct geni_i2c_dev *gi2c)
> > static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
> > u32 m_param)
> > {
> > + struct device_node *np = gi2c->se.dev->of_node;
> > dma_addr_t rx_dma;
> > unsigned long time_left;
> > - void *dma_buf;
> > + void *dma_buf = NULL;
> > struct geni_se *se = &gi2c->se;
> > size_t len = msg->len;
> >
> > - dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
> > + if (!of_property_read_bool(np, "qcom,geni-se-no-dma"))
> > + dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
> > +
> > if (dma_buf)
> > geni_se_select_mode(se, GENI_SE_DMA);
> > else
> > @@ -392,13 +395,16 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
> > static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
> > u32 m_param)
> > {
> > + struct device_node *np = gi2c->se.dev->of_node;
> > dma_addr_t tx_dma;
> > unsigned long time_left;
> > - void *dma_buf;
> > + void *dma_buf = NULL;
> > struct geni_se *se = &gi2c->se;
> > size_t len = msg->len;
> >
> > - dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
> > + if (!of_property_read_bool(np, "qcom,geni-se-no-dma"))
> > + dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
> > +
> > if (dma_buf)
> > geni_se_select_mode(se, GENI_SE_DMA);
> > else
--
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
next prev parent reply other threads:[~2019-09-05 9:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-05 7:52 [PATCH 1/2] dt-bindings: soc: qcom: Provide option to disable DMA Lee Jones
2019-09-05 7:52 ` [PATCH 2/2] i2c: qcom-geni: Provide an option to disable DMA processing Lee Jones
2019-09-05 9:18 ` Wolfram Sang
2019-09-05 9:28 ` Lee Jones [this message]
2019-09-05 13:43 ` Wolfram Sang
2019-09-05 14:34 ` Lee Jones
2019-09-05 8:04 ` [PATCH 1/2] dt-bindings: soc: qcom: Provide option to disable DMA Rob Herring
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190905092816.GD26880@dell \
--to=lee.jones@linaro.org \
--cc=agross@kernel.org \
--cc=alokc@codeaurora.org \
--cc=bjorn.andersson@linaro.org \
--cc=devicetree@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-i2c@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=robh+dt@kernel.org \
--cc=vkoul@kernel.org \
--cc=wsa@the-dreams.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).