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Subject: Re: [PATCH] Revert "i2c: qcom-geni: Disable DMA processing on the
 Lenovo Yoga C630"
To:     Bjorn Andersson <bjorn.andersson@linaro.org>,
        Andy Gross <agross@kernel.org>,
        Akash Asthana <akashast@codeaurora.org>,
        Mukesh Savaliya <msavaliy@codeaurora.org>,
        Sumit Semwal <sumit.semwal@linaro.org>,
        =?UTF-8?Q?Christian_K=c3=b6nig?= <christian.koenig@amd.com>,
        Wolfram Sang <wsa@kernel.org>, Shawn Guo <shawn.guo@linaro.org>
Cc:     linux-arm-msm@vger.kernel.org, linux-i2c@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
        dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org
References: <20201124185743.401946-1-bjorn.andersson@linaro.org>
From:   Steev Klimaszewski <steev@kali.org>
Message-ID: <f5aca410-f964-07d4-e18a-e438881e37cc@kali.org>
Date:   Mon, 30 Nov 2020 10:19:51 -0600
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On 11/24/20 12:57 PM, Bjorn Andersson wrote:
> A combination of recent bug fixes by Doug Anderson and the proper
> definition of iommu streams means that this hack is no longer needed.
> Let's clean up the code by reverting '127068abe85b ("i2c: qcom-geni:
> Disable DMA processing on the Lenovo Yoga C630")'.
>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
>  drivers/i2c/busses/i2c-qcom-geni.c | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
> index dce75b85253c..046d241183c5 100644
> --- a/drivers/i2c/busses/i2c-qcom-geni.c
> +++ b/drivers/i2c/busses/i2c-qcom-geni.c
> @@ -353,13 +353,11 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
>  {
>  	dma_addr_t rx_dma;
>  	unsigned long time_left;
> -	void *dma_buf = NULL;
> +	void *dma_buf;
>  	struct geni_se *se = &gi2c->se;
>  	size_t len = msg->len;
>  
> -	if (!of_machine_is_compatible("lenovo,yoga-c630"))
> -		dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
> -
> +	dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
>  	if (dma_buf)
>  		geni_se_select_mode(se, GENI_SE_DMA);
>  	else
> @@ -394,13 +392,11 @@ static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
>  {
>  	dma_addr_t tx_dma;
>  	unsigned long time_left;
> -	void *dma_buf = NULL;
> +	void *dma_buf;
>  	struct geni_se *se = &gi2c->se;
>  	size_t len = msg->len;
>  
> -	if (!of_machine_is_compatible("lenovo,yoga-c630"))
> -		dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
> -
> +	dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
>  	if (dma_buf)
>  		geni_se_select_mode(se, GENI_SE_DMA);
>  	else

Tested-by: Steev Klimaszewski <steev@kali.org>