linux-kernel - Re: [PATCH v2 04/19] ARM: dts: imx6-sabrelite: add OV5642 and OV5640 camera sensors

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Date:   Thu, 5 Jan 2017 11:20:57 -0800
From:   Steve Longerbeam <slongerbeam@...il.com>
To:     Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>,
        shawnguo@...nel.org, kernel@...gutronix.de, fabio.estevam@....com,
        robh+dt@...nel.org, mark.rutland@....com, linux@...linux.org.uk,
        mchehab@...nel.org, gregkh@...uxfoundation.org,
        p.zabel@...gutronix.de
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        devel@...verdev.osuosl.org,
        Steve Longerbeam <steve_longerbeam@...tor.com>
Subject: Re: [PATCH v2 04/19] ARM: dts: imx6-sabrelite: add OV5642 and OV5640
 camera sensors

Hi Vladimir,


On 01/04/2017 04:25 AM, Vladimir Zapolskiy wrote:
> Hi Steve,
>
> On 01/03/2017 10:57 PM, Steve Longerbeam wrote:
>> Enables the OV5642 parallel-bus sensor, and the OV5640 MIPI CSI-2 sensor.
>> Both hang off the same i2c2 bus, so they require different (and non-
>> default) i2c slave addresses.
>>
>> The OV5642 connects to the parallel-bus mux input port on ipu1_csi0_mux.
>>
>> The OV5640 connects to the input port on the MIPI CSI-2 receiver on
>> mipi_csi. It is set to transmit over MIPI virtual channel 1.
>>
>> Note there is a pin conflict with GPIO6. This pin functions as a power
>> input pin to the OV5642, but ENET uses it as the h/w workaround for
>> erratum ERR006687, to wake-up the ARM cores on normal RX and TX packet
>> done events (see 6261c4c8). So workaround 6261c4c8 is reverted here to
>> support the OV5642, and the "fsl,err006687-workaround-present" boolean
>> also must be removed. The result is that the CPUidle driver will no longer
>> allow entering the deep idle states on the sabrelite.
> For me it sounds like a candidate of its own separate change.

Yes, I split out the two partial reverts into a separate commit
("ARM: dts: imx6qdl-sabrelite: remove erratum ERR006687
  workaround").

>
>
>
>> +
>> +	mipi_camera: ov5640@40 {
> Please reorder device nodes by address value,

done.

>   also according to ePAPR
> node names should be generic, labels can be specific:
>
> 	ov5640: camera@40 {
> 		...
> 	};
>
> 	ov5642: camera@42 {
> 		...
> 	};

fixed.

>
>> +		pinctrl_ipu1_csi0: ipu1grp-csi0 {
> Please rename node name to ipu1csi0grp.

done.

>
>> +
>> +                pinctrl_ov5640: ov5640grp {
>> +                        fsl,pins = <
>> +				MX6QDL_PAD_NANDF_D5__GPIO2_IO05 0x000b0
>> +				MX6QDL_PAD_NANDF_WP_B__GPIO6_IO09 0x0b0b0
>> +                        >;
>> +                };
>> +
> Indentation issues above, please use tabs instead of spaces.

fixed.

>
> Also please add new pin control groups preserving the alphanimerical order.

done.

Steve