Re: [PATCH v4 0/6] media: qcom: iris: add support for decoding 10bit formats

[Wangao Wang]

On 2026/5/29 17:55, Neil Armstrong wrote:
> Hi,
>
> On 5/29/26 10:21, Wangao Wang wrote:
> > On 2026/5/28 21:26, Neil Armstrong wrote:
> > > Hi Wangao,
> > >
> > > On 5/27/26 06:15, Wangao Wang wrote:
> > > > I tested the v4 patch using the gst command you provided earlier. 
> > > > The decoded output still has the previous plane misalignment issue, 
> > > > but all frames are decoded successfully. When viewing the raw data 
> > > > with an image player at 1920x1080 resolution, the first frame looks 
> > > > correct but subsequent frames appear shifted. If viewed at 1920x1088 
> > > > resolution, there are artifacts at the bottom of each frame. I've 
> > > > attached the images.
> > > >
> > > > Also, have you tested the 720p case? I can't get it to run on my end.
> > >
> > > Thanks for the report but I don't have access to the Purwa platform 
> > > you use,
> > > I've run test with multiple resolutions with display using P010
> > > and QC10, and ran fluster aswell and all passed on SM8550 and SM8650.
> > >
> > > I'll test it on the Hamoa T14S I have which should be the closest to 
> > > purwa,
> > > but it uses the same driver setup as SM8550 so I expected it to work 
> > > the same.
> > >
> > > Could you indicate which iris firmware you're using ?
> > >
> > > Could you try passing the fluster h265 main10 test suite with 
> > > gstreamer ?
> > >
> > > fluster download -c h.265
> > > fluster run -d GStreamer-H.265-V4L2 -ts JCT-VC-HEVC_V1 -q -s -j1
> > >
> > > The picture you send looks like there's a mismatch with the kernel
> > > and firmware setup of planes offsets.
> > > Could you check if there's a Purwa specific firmware property
> > > to set for 10bit decoding ?
> > >
> > > Neil
> > >
> > > >
> >
> > Hi Neil,
> >
> > I also tested on hamoa, and it has the same issue as purwa. The 
> > firmware used on purwa is vpu30_p1_s7.mbn.
> >
> > This is the result of fluster:
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WP_MAIN10_B_Toshiba_3 
> >       ... Success
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WPP_A_ericsson_MAIN10_2 
> >       ... Success
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WPP_A_ericsson_MAIN_2 
> >       ... Success
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WPP_B_ericsson_MAIN10_2 
> >       ... Success
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WPP_B_ericsson_MAIN_2 
> >       ... Success
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WPP_C_ericsson_MAIN10_2 
> >       ... Success
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WPP_C_ericsson_MAIN_2 
> >       ... Success
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WPP_D_ericsson_MAIN10_2 
> >       ... Error
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WPP_D_ericsson_MAIN_2 
> >       ... Error
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WPP_E_ericsson_MAIN10_2 
> >       ... Success
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WPP_E_ericsson_MAIN_2 
> >       ... Success
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WPP_F_ericsson_MAIN10_2 
> >       ... Success
> > [JCT-VC-HEVC_V1] (GStreamer-H.265-V4L2-Gst1.0) WPP_F_ericsson_MAIN_2 
> >       ... Success
>
> Ok so this works fine, so I'm really wondering if your main10 HEVC is 
> not properly encoded.
>
> Could you try playing a well know HEVC main10 files ?
>
> For example I just tried the 1080p and 4k 10bit files on Hamoa + fluster 
> and it just worked as expected:
> https://larmoire.org/jellyfish/
> https://larmoire.org/jellyfish/media/jellyfish-10-mbps-hd-hevc-10bit.mkv
> https://larmoire.org/jellyfish/media/jellyfish-120-mbps-4k-uhd- 
> hevc-10bit.mkv
>
> Neil
>
>
> >

Could you provide the test commands? I tried both files and the results 
from gst still show anomalies, but the results from iris_test_app are 
normal. I'm wondering if there are any additional settings needed on the 
client side.

Here are my test commands:
gst-launch-1.0 -v -m filesrc 
location=jellyfish-10-mbps-hd-hevc-10bit.mkv ! matroskademux ! h265parse 
! v4l2h265dec ! filesink location=1080P_out.yuv
gst-launch-1.0 -v -m filesrc 
location=jellyfish-120-mbps-4k-uhd-hevc-10bit.mkv ! matroskademux ! 
h265parse ! v4l2h265dec ! filesink location=4K_out.yuv

--
Best Regards,
Wangao