From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Caleb Connolly <caleb@connolly.tech>
Cc: linux-arm-msm@vger.kernel.org, Andy Gross <agross@kernel.org>,
Akash Asthana <akashast@codeaurora.org>,
Mukesh Savaliya <msavaliy@codeaurora.org>,
phone-devel@vger.kernel.org,
~postmarketos/upstreaming@lists.sr.ht, linux-i2c@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 5/5] i2c: geni: sdm845: dont perform DMA for OnePlus 6 devices
Date: Sat, 21 Nov 2020 21:47:09 -0600 [thread overview]
Message-ID: <20201122034709.GA95182@builder.lan> (raw)
In-Reply-To: <20201112161920.2671430-6-caleb@connolly.tech>
On Thu 12 Nov 10:22 CST 2020, Caleb Connolly wrote:
> The OnePlus 6/T has the same issue as the Yoga c630 causing a crash when DMA
> is used for i2c, so disable it.
>
> https://patchwork.kernel.org/patch/11133827/
>
> Signed-off-by: Caleb Connolly <caleb@connolly.tech>
> ---
> drivers/i2c/busses/i2c-qcom-geni.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
> index 8b4c35f47a70..9acdcfe73be2 100644
> --- a/drivers/i2c/busses/i2c-qcom-geni.c
> +++ b/drivers/i2c/busses/i2c-qcom-geni.c
> @@ -357,7 +357,8 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
> struct geni_se *se = &gi2c->se;
> size_t len = msg->len;
>
> - if (!of_machine_is_compatible("lenovo,yoga-c630"))
> + if (!of_machine_is_compatible("lenovo,yoga-c630") &&
> + !of_machine_is_compatible("oneplus,oneplus6"))
This hack seems to have been working around two separate issues. First
with iommu active the GENI wrappers needs to have their stream mapping
configured. Secondly there was a bug in the transaction setup that was
recently fixed by Doug Anderson.
So can you please give the following patch a go? I've yet to test it on
the Lenovo machine, but I think it allows us to remove the quirk.
https://lore.kernel.org/lkml/20201122034149.626045-1-bjorn.andersson@linaro.org/T/#u
Regards,
Bjorn
> dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
>
> if (dma_buf)
> @@ -399,7 +400,8 @@ static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
> struct geni_se *se = &gi2c->se;
> size_t len = msg->len;
>
> - if (!of_machine_is_compatible("lenovo,yoga-c630"))
> + if (!of_machine_is_compatible("lenovo,yoga-c630") &&
> + !of_machine_is_compatible("oneplus,oneplus6"))
> dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
>
> if (dma_buf)
> --
> 2.29.2
>
>
next prev parent reply other threads:[~2020-11-22 3:47 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20201112161920.2671430-1-caleb@connolly.tech>
2020-11-12 16:21 ` [PATCH 1/5] drm/panel/samsung-sofef00: Add panel for OnePlus 6/T devices Caleb Connolly
2020-11-14 19:58 ` Sam Ravnborg
2020-11-12 16:21 ` [PATCH 2/5] dt-bindings: panel-simple-dsi: add samsung panels for OnePlus 6/T Caleb Connolly
2020-11-14 19:59 ` Sam Ravnborg
2020-11-12 16:21 ` [PATCH 3/5] arm64: dts: sdm845: add oneplus 6/t devices Caleb Connolly
2020-11-16 22:01 ` Pavel Machek
2020-11-16 23:49 ` Caleb Connolly
2020-11-21 17:44 ` Pavel Machek
2020-11-21 4:28 ` Bjorn Andersson
2020-11-12 16:21 ` [PATCH 4/5] dt-bindings: add vendor bindings for OnePlus Caleb Connolly
2020-11-16 14:47 ` Rob Herring
2020-11-16 14:53 ` Rob Herring
2020-11-12 16:22 ` [PATCH 5/5] i2c: geni: sdm845: dont perform DMA for OnePlus 6 devices Caleb Connolly
2020-11-17 11:47 ` Akash Asthana
2020-11-22 3:47 ` Bjorn Andersson [this message]
2020-11-22 17:59 ` Caleb Connolly
2020-12-02 15:39 ` Wolfram Sang
2020-12-02 16:36 ` Bjorn Andersson
2020-12-02 20:21 ` Wolfram Sang
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