linux-kernel - Re: [PATCH 0/6] staging: BCM2835 MMAL V4L2 camera driver

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Date:   Mon, 20 Mar 2017 12:33:45 -0300
From:   Mauro Carvalho Chehab <mchehab@...pensource.com>
To:     Michael Zoran <mzoran@...wfest.net>
Cc:     Eric Anholt <eric@...olt.net>, devel@...verdev.osuosl.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org
Subject: Re: [PATCH 0/6] staging: BCM2835 MMAL V4L2 camera driver

Em Mon, 20 Mar 2017 08:11:41 -0700
Michael Zoran <mzoran@...wfest.net> escreveu:

> On Mon, 2017-03-20 at 11:58 -0300, Mauro Carvalho Chehab wrote:
> > Em Mon, 20 Mar 2017 04:08:21 -0700
> > Michael Zoran <mzoran@...wfest.net> escreveu:
> >   
> > > On Mon, 2017-03-20 at 07:58 -0300, Mauro Carvalho Chehab wrote:  
> > > > Em Sun, 19 Mar 2017 22:11:07 -0300
> > > > Mauro Carvalho Chehab <mchehab@...pensource.com> escreveu:
> > > >     
> > > > > Em Sun, 19 Mar 2017 10:04:28 -0700
> > > > > Michael Zoran <mzoran@...wfest.net> escreveu:
> > > > >     
> > > > > > A working DT that I tried this morning with the current
> > > > > > firmware
> > > > > > is
> > > > > > posted here:
> > > > > > http://lists.infradead.org/pipermail/linux-rpi-kernel/2017-Ma
> > > > > > rch/
> > > > > > 005924
> > > > > > .html
> > > > > > 
> > > > > > It even works with minecraft_pi!      
> > > > 
> > > >     
> > > 
> > > Hi, can you e-mail out your config.txt?  Do you have audio enabled
> > > in
> > > config.txt?  
> > 
> > yes, I have this:
> > 
> > $ cat config.txt |grep -i audio
> > # uncomment to force a HDMI mode rather than DVI. This can make audio
> > work in
> > # Enable audio (loads snd_bcm2835)
> > dtparam=audio=on
> > 
> > Full config attached.
> > 
> > Thanks,
> > Mauro
> >   
> 
> Are you using Eric Anholt's HDMI Audio driver that's included in VC4? 
> That could well be incompatible with the firmware driver. Or are you
> using a half mode of VC4 for audio and VCHIQ for video?

I'm using vanilla staging Kernel, from Greg's tree:
	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git/commit/?h=staging-next&id=7bc49cb9b9b8bad32536c4b6d1aff1824c1adc6c

Plus the DWC2 fixup I wrote and DT changes you pointed
(see enclosed).

I can disable the audio overlay here, as I don't have anything 
connected to audio inputs/outputs.

Regards,
Mauro

---


diff --git a/arch/arm/boot/dts/bcm2835-rpi.dtsi b/arch/arm/boot/dts/bcm2835-rpi.dtsi
index 38e6050035bc..1f42190e8558 100644
--- a/arch/arm/boot/dts/bcm2835-rpi.dtsi
+++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi
@@ -27,6 +27,14 @@
                        firmware = <&firmware>;
                        #power-domain-cells = <1>;
                };
+
+               vchiq {
+                       compatible = "brcm,bcm2835-vchiq";
+                       reg = <0x7e00b840 0xf>;
+                       interrupts = <0 2>;
+                       cache-line-size = <32>;
+                       firmware = <&firmware>;
+               };
        };
 };

diff --git a/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts b/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts
index c309633a1e87..7e8d42904022 100644
--- a/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts
+++ b/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts
@@ -17,6 +17,45 @@
                        gpios = <&gpio 47 0>;
                };
        };
+
+
+       soc {
+
+//             hvs at 7e400000 {
+//                     status = "disabled";
+//             };
+
+//             v3d: v3d at 7ec00000 {
+//                     status = "disabled";
+//             };
+
+               vc4: gpu {
+                       status = "disabled";
+               };
+
+               fb: fb {
+                       status = "disabled";
+               };
+
+               vchiq: vchiq {
+                       compatible = "brcm,bcm2835-vchiq";
+                       reg = <0x7e00b840 0xf>;
+                       interrupts = <0 2>;
+                       cache-line-size = <32>;
+                       firmware = <&firmware>;
+               };
+
+               audio: audio {
+                       compatible = "brcm,bcm2835-audio";
+                       brcm,pwm-channels = <8>;
+               };
+
+       };
+
+       __overrides__ {
+               cache_line_size = <&vchiq>, "cache-line-size:0";
+       };
+
 };
 

Thanks,
Mauro