linux-kernel - Re: [PATCH RFC 8/8] media: qcom: camss: Remove D-PHY-only endpoint restriction

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Message-ID: <a13b5b89-ee13-4fe6-b57c-5e4ea724522f@linaro.org>
Date: Sun, 9 Nov 2025 13:43:40 +0100
From: Casey Connolly <casey.connolly@...aro.org>
To: david@...t.cz, Robert Foss <rfoss@...nel.org>,
 Todor Tomov <todor.too@...il.com>,
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
 Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
 Mauro Carvalho Chehab <mchehab@...nel.org>,
 Luca Weiss <luca.weiss@...rphone.com>, Petr Hodina <phodina@...tonmail.com>,
 "Dr. Git" <drgitx@...il.com>
Cc: Joel Selvaraj <foss@...lselvaraj.com>, linux-media@...r.kernel.org,
 linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
 phone-devel@...r.kernel.org
Subject: Re: [PATCH RFC 8/8] media: qcom: camss: Remove D-PHY-only endpoint
 restriction

On 11/9/25 10:39, David Heidelberg via B4 Relay wrote:
> From: David Heidelberg <david@...t.cz>
> 
> C-PHY mode is now supported, so the endpoint bus-type restriction to
> D-PHY can be removed.
> 
> Signed-off-by: David Heidelberg <david@...t.cz>
> ---
>   drivers/media/platform/qcom/camss/camss.c | 9 ---------
>   1 file changed, 9 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
> index 248aa6b21b5ad..1408e8a03f0bd 100644
> --- a/drivers/media/platform/qcom/camss/camss.c
> +++ b/drivers/media/platform/qcom/camss/camss.c
> @@ -4044,15 +4044,6 @@ static int camss_of_parse_endpoint_node(struct device *dev,
>   	if (ret)
>   		return ret;
>   
> -	/*
> -	 * Most SoCs support both D-PHY and C-PHY standards, but currently only
> -	 * D-PHY is supported in the driver.
> -	 */
> -	if (vep.bus_type != V4L2_MBUS_CSI2_DPHY) {
> -		dev_err(dev, "Unsupported bus type %d\n", vep.bus_type);
> -		return -EINVAL;
> -	}

Might be better to just expand the check to include C-phy, since there 
are other bus types that are also unsupported.> -
>   	csd->interface.csiphy_id = vep.base.port;
>   
>   	mipi_csi2 = &vep.bus.mipi_csi2;
>