On Tue, Nov 27, 2018 at 04:30:55PM +0530, Jagan Teki wrote:
> > > > +&i2c1 {
> > > > +       pinctrl-names = "default";
> > > > +       pinctrl-0 = <&i2c1_pins_a>;
> > > > +       status = "okay";
> > > > +
> > > > +       camera: camera@21 {
> > > > +               compatible = "ovti,ov5640";
> > > > +               reg = <0x21>;
> > > > +                clocks = <&ccu CLK_CSI0>;
> > > > +                clock-names = "xclk";
> > > > +               assigned-clocks = <&ccu CLK_CSI0>;
> > > > +               assigned-clock-rates = <24000000>;
> > > > +
> > > > +                reset-gpios = <&pio 7 14 GPIO_ACTIVE_LOW>;
> > > > +                powerdown-gpios = <&pio 7 19 GPIO_ACTIVE_HIGH>;
> > > > +                AVDD-supply = <&reg_cam_avdd>;
> > > > +                DOVDD-supply = <&reg_cam_dovdd>;
> > > > +                DVDD-supply = <&reg_cam_dvdd>;
> > > > +
> > > > +                port {
> > > > +                        ov5640_to_csi: endpoint {
> > > > +                                remote-endpoint = <&csi_from_ov5640>;
> > > > +                                bus-width = <8>;
> > > > +                                data-shift = <2>;
> > > > +                                hsync-active = <1>; /* Active high */
> > > > +                                vsync-active = <0>; /* Active low */
> > > > +                                data-active = <1>;  /* Active high */
> > > > +                                pclk-sample = <1>;  /* Rising */
> > > > +                        };
> > > > +                };
> > > > +       };
> > >
> > > Does ov5640 need any further patches, wrt linux-next? I'm trying to
> > > test this on top of linux-next but the slave id seems not detecting.
> > >
> > > [    2.304711] ov5640 1-0021: Linked as a consumer to regulator.5
> > > [    2.310639] ov5640 1-0021: Linked as a consumer to regulator.6
> > > [    2.316592] ov5640 1-0021: Linked as a consumer to regulator.4
> > > [    2.351540] ov5640 1-0021: ov5640_init_slave_id: failed with -6
> > > [    2.357543] ov5640 1-0021: Dropping the link to regulator.5
> > > [    2.363224] ov5640 1-0021: Dropping the link to regulator.6
> > > [    2.368829] ov5640 1-0021: Dropping the link to regulator.4
> > >
> > > Here is the full log [1], please let me know if I miss anything, I
> > > even tried to remove MCLK pin
> >
> > You seem to have made local modifications to your tree, what are they?
> > This indicates that the communication over i2c doesn't work, what is
> > your setup?
> 
> I just used your commits on linux-next [2], with the setup similar in
> Page 5 on datasheet[3]. The only difference is csi build issue, I have
> updated similar fix you mentioned on sun6i_csi [4]
> 
> [2] https://github.com/amarula/linux-amarula/commits/CSI-A20
> [3] https://www.tme.eu/gb/Document/187887186b98a8f78b47da2774a34f4c/BPI-CAMERA.pdf
> [4] https://github.com/amarula/linux-amarula/commit/a6762ecd38f000e2bd02dd255f6fd0c1ae755429#diff-0809a7f97ca58771c1cda186e73ec657

That branch doesn't have any commit with the same ID that you have in
your boot log.

Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com