Re: [PATCH v4 0/6] media: Introduce Allwinner H3 deinterlace driver

From: Hans Verkuil
Date: Mon Oct 21 2019 - 07:16:32 EST

Hi Jernej,

I found something odd in the compliance output:

On 10/17/19 8:37 PM, Jernej Skrabec wrote:
> Starting with H3, Allwinner began to include standalone deinterlace
> core in multimedia oriented SoCs. This patch series introduces support
> for it. Note that new SoCs, like H6, have radically different (updated)
> deinterlace core, which will need a new driver.
>
> v4l2-compliance report:
> v4l2-compliance SHA: dece02f862f38d8f866230ca9f1015cb93ddfac4, 32 bits
>
> Compliance test for sun8i-di device /dev/video0:
>
> Driver Info:
> Driver name : sun8i-di
> Card type : sun8i-di
> Bus info : platform:sun8i-di
> Driver version : 5.3.0
> Capabilities : 0x84208000
> Video Memory-to-Memory
> Streaming
> Extended Pix Format
> Device Capabilities
> Device Caps : 0x04208000
> Video Memory-to-Memory
> Streaming
> Extended Pix Format
>
> Required ioctls:
> test VIDIOC_QUERYCAP: OK
>
> Allow for multiple opens:
> test second /dev/video0 open: OK
> test VIDIOC_QUERYCAP: OK
> test VIDIOC_G/S_PRIORITY: OK
> test for unlimited opens: OK
>
> Debug ioctls:
> test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
> test VIDIOC_LOG_STATUS: OK (Not Supported)
>
> Input ioctls:
> test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
> test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
> test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
> test VIDIOC_ENUMAUDIO: OK (Not Supported)
> test VIDIOC_G/S/ENUMINPUT: OK (Not Supported)
> test VIDIOC_G/S_AUDIO: OK (Not Supported)
> Inputs: 0 Audio Inputs: 0 Tuners: 0
>
> Output ioctls:
> test VIDIOC_G/S_MODULATOR: OK (Not Supported)
> test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
> test VIDIOC_ENUMAUDOUT: OK (Not Supported)
> test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
> test VIDIOC_G/S_AUDOUT: OK (Not Supported)
> Outputs: 0 Audio Outputs: 0 Modulators: 0
>
> Input/Output configuration ioctls:
> test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
> test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
> test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
> test VIDIOC_G/S_EDID: OK (Not Supported)
>
> Control ioctls:
> test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK (Not Supported)
> test VIDIOC_QUERYCTRL: OK (Not Supported)
> test VIDIOC_G/S_CTRL: OK (Not Supported)
> test VIDIOC_G/S/TRY_EXT_CTRLS: OK (Not Supported)
> test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK (Not Supported)
> test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
> Standard Controls: 0 Private Controls: 0
>
> Format ioctls:
> test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
> test VIDIOC_G/S_PARM: OK (Not Supported)
> test VIDIOC_G_FBUF: OK (Not Supported)
> test VIDIOC_G_FMT: OK
> test VIDIOC_TRY_FMT: OK
> test VIDIOC_S_FMT: OK
> test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
> test Cropping: OK (Not Supported)
> test Composing: OK (Not Supported)
> test Scaling: OK

This claims that the driver supports scaling, but I don't think that is right.

More likely the deinterlacing part is what confuses the compliance test.

Can you look in v4l2-test-formats.cpp, function testBasicScaling() where it
sets node->can_scale to true? And see if this is due to a driver bug, or due
to a bug in the test?

Regards,

Hans

>
> Codec ioctls:
> test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
> test VIDIOC_G_ENC_INDEX: OK (Not Supported)
> test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)
>
> Buffer ioctls:
> test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
> test VIDIOC_EXPBUF: OK
> test Requests: OK (Not Supported)
>
> Total for sun8i-di device /dev/video0: 44, Succeeded: 44, Failed: 0, Warnings: 0
>
> Please take a look.
>
> Best regards,
> Jernej
>
> Changes from v3:
> - added Maxime's a-b tag
> - moved and fixed Kconfig entry
> - put clk_set_rate_exclusive() and it's counterpart in PM callbacks
>
> Changes from v2:
> - added acked-by and review-by tags
> - fixed schema path in H3 deinterlace binding
> - moved busy check after format args check
>
> Changes from v1:
> - updated Maxime's e-mail in DT binding
> - removed "items" for single item in DT binding
> - implemented power management
> - replaced regmap with direct io access
> - set exclusive clock rate
> - renamed DEINTERLACE_FRM_CTRL_COEF_CTRL to DEINTERLACE_FRM_CTRL_COEF_ACCESS
>
> Jernej Skrabec (6):
> dt-bindings: bus: sunxi: Add H3 MBUS compatible
> clk: sunxi-ng: h3: Export MBUS clock
> ARM: dts: sunxi: h3/h5: Add MBUS controller node
> dt-bindings: media: Add Allwinner H3 Deinterlace binding
> media: sun4i: Add H3 deinterlace driver
> dts: arm: sun8i: h3: Enable deinterlace unit
>
> .../bindings/arm/sunxi/sunxi-mbus.txt | 1 +
> .../media/allwinner,sun8i-h3-deinterlace.yaml | 75 ++
> MAINTAINERS | 7 +
> arch/arm/boot/dts/sun8i-h3.dtsi | 13 +
> arch/arm/boot/dts/sunxi-h3-h5.dtsi | 9 +
> drivers/clk/sunxi-ng/ccu-sun8i-h3.h | 4 -
> drivers/media/platform/Kconfig | 12 +
> drivers/media/platform/sunxi/Makefile | 1 +
> .../media/platform/sunxi/sun8i-di/Makefile | 2 +
> .../media/platform/sunxi/sun8i-di/sun8i-di.c | 1028 +++++++++++++++++
> .../media/platform/sunxi/sun8i-di/sun8i-di.h | 237 ++++
> include/dt-bindings/clock/sun8i-h3-ccu.h | 2 +-
> 12 files changed, 1386 insertions(+), 5 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/media/allwinner,sun8i-h3-deinterlace.yaml
> create mode 100644 drivers/media/platform/sunxi/sun8i-di/Makefile
> create mode 100644 drivers/media/platform/sunxi/sun8i-di/sun8i-di.c
> create mode 100644 drivers/media/platform/sunxi/sun8i-di/sun8i-di.h
>