linux-kernel - Re: [PATCH v3 0/4] media: qcom: flip the switch between Venus and Iris drivers

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Message-ID: <xyhl36bcpmjhav73ujlvbtwqixngr5vko75t335mlcebxrs7lc@t43mxhknuqtj>
Date: Thu, 29 Jan 2026 02:21:41 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Vikash Garodia <vikash.garodia@....qualcomm.com>
Cc: Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Bryan O'Donoghue <bod@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        cros-qcom-dts-watchers@...omium.org,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Stephan Gerhold <stephan.gerhold@...aro.org>,
        Douglas Anderson <dianders@...omium.org>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH v3 0/4] media: qcom: flip the switch between Venus and
 Iris drivers

On Wed, Jan 28, 2026 at 06:35:01PM +0530, Vikash Garodia wrote:
> 
> On 1/27/2026 5:52 PM, Dmitry Baryshkov wrote:
> > As the Venus and Iris drivers are close to the "feature parity" for the
> > common platforms (SC7280, SM8250), in order to get more attention to
> > squashing bugs from the Iris driver, flip the switch and default to the
> > Iris driver if both are enabled. The Iris driver has several
> > regressions, but hopefully they can be fixed through the development
> > cycle by the respective team. Also it is better to fail the test than
> > crash the device (which Venus driver does a lot).
> > 
> > Note: then intention is to land this in 6.21, which might let us to
> > drop those platforms from the Venus driver in 6.22+.
> > 
> > Testing methodology: fluster test-suite, single-threaded mode, SM8250
> > device (RB5).
> 
> Could you run fluster on SC7280 as well ? Also please share the v4l2
> compliance results.

Okay, the SC7280 is a bit more interesting. For H.264 and VP9 the
results are the same. For H.265 Iris errors out for all tests except for
the one, WPP_E_ericsson_MAIN_2.

The kernel prints the following message:

[   82.573112] qcom-iris aa00000.video-codec: session error for command: d0000000, event id:1009, session id:52ef2000


Compliance tests:

v4l2-compliance 1.30.1, 64 bits, 64-bit time_t

Compliance test for iris_driver device /dev/video1:

Driver Info:
        Driver name      : iris_driver
        Card type        : Iris Encoder
        Bus info         : platform:aa00000.video-codec
        Driver version   : 6.19.0
        Capabilities     : 0x84204000
                Video Memory-to-Memory Multiplanar
                Streaming
                Extended Pix Format
                Device Capabilities
        Device Caps      : 0x04204000
                Video Memory-to-Memory Multiplanar
                Streaming
                Extended Pix Format
        Detected Stateful Encoder

Required ioctls:
        test VIDIOC_QUERYCAP: OK
        test invalid ioctls: OK

Allow for multiple opens:
        test second /dev/video1 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
        test VIDIOC_QUERYCTRL: OK
        test VIDIOC_G/S_CTRL: OK
        test VIDIOC_G/S/TRY_EXT_CTRLS: OK
        test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
        test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
        Standard Controls: 18 Private Controls: 0

Format ioctls:
        test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
        test VIDIOC_G/S_PARM: OK
        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
        test Composing: OK (Not Supported)
        test Scaling: OK (Not Supported)

Codec ioctls:
        test VIDIOC_(TRY_)ENCODER_CMD: OK
        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 CREATE_BUFS maximum buffers: OK
        test VIDIOC_REMOVE_BUFS: OK
        test VIDIOC_EXPBUF: OK
        test Requests: OK (Not Supported)
        test blocking wait: OK

Total for iris_driver device /dev/video0: 48, Succeeded: 48, Failed: 0, Warnings: 0

-- 
With best wishes
Dmitry