linux-kernel - Re: [PATCH 1/1] venus : Fix for H265 decoding failure.

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Message-ID: <CANHAJhENA5ssFBBDeqfDyC8v_CwZhpiJC93B1HZnL4K+N3N35A@mail.gmail.com>
Date:   Fri, 2 Dec 2022 11:48:37 -0800
From:   Nathan Hebert <nhebert@...omium.org>
To:     quic_vboma@...cinc.com
Cc:     Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Vikash Garodia <vgarodia@....qualcomm.com>
Subject: Re: [PATCH 1/1] venus : Fix for H265 decoding failure.

On Thu, Dec 1, 2022 at 4:12 PM Nathan Hebert <nhebert@...omium.org> wrote:
>
> On Tue, Nov 15, 2022 at 4:10 AM <quic_vboma@...cinc.com> wrote:
> >
> > From: Viswanath Boma <quic_vboma@...cinc.com>
> >
> > Aligned the mismatch of persist1 and scratch1 buffer calculation,
> > as per the firmware requirements .
> >
> > Signed-off-by: Vikash Garodia <vgarodia@....qualcomm.com>
> > Signed-off-by: Viswanath Boma <quic_vboma@...cinc.com>
> > ---
> >  drivers/media/platform/qcom/venus/hfi_plat_bufs_v6.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/media/platform/qcom/venus/hfi_plat_bufs_v6.c b/drivers/media/platform/qcom/venus/hfi_plat_bufs_v6.c
> > index ea25c451222b..a9be31ec6927 100644
> > --- a/drivers/media/platform/qcom/venus/hfi_plat_bufs_v6.c
> > +++ b/drivers/media/platform/qcom/venus/hfi_plat_bufs_v6.c
> > @@ -93,7 +93,7 @@
> >  #define LCU_MIN_SIZE_PELS              16
> >  #define SIZE_SEI_USERDATA              4096
> >
> > -#define H265D_MAX_SLICE                        600
> > +#define H265D_MAX_SLICE                        3600
> >  #define SIZE_H265D_HW_PIC_T            SIZE_H264D_HW_PIC_T
> >  #define SIZE_H265D_BSE_CMD_PER_BUF     (16 * sizeof(u32))
> >  #define SIZE_H265D_VPP_CMD_PER_BUF     256
> > @@ -1021,7 +1021,7 @@ static u32 h264d_persist1_size(void)
> >  static u32 h265d_persist1_size(void)
> >  {
> >         return ALIGN((SIZE_SLIST_BUF_H265 * NUM_SLIST_BUF_H265 + H265_NUM_TILE
> > -                       * sizeof(u32)), HFI_DMA_ALIGNMENT);
> > +                       * sizeof(u32) + NUM_HW_PIC_BUF * SIZE_SEI_USERDATA), HFI_DMA_ALIGNMENT);
> >  }
> >
> >  static u32 vp8d_persist1_size(void)
> > --
> > 2.17.1
> >
> Hi Viswanath. I tested this patch on ChromiumOS's downstream
> 5.15-based fork. Using ITU-T HEVC test vectors [0] I am seeing
> firmware errors "qcom-venus-decoder aa00000.video-codec:video-decoder:
> VenusMed : event not sufficient resources". Does this change fix HEVC
> decoding for you?
>

Hi Viswanath. Thanks for looking at the logs offline. I re-tested
after adding Q08C (UBWC) support to my decoder client, and it fixed
the error that I was seeing. My mistake. Each of the main profile test
vectors now decodes correctly after applying your patch!

Tested-by: Nathan Hebert <nhebert@...omium.org>

> [0]: https://www.itu.int/wftp3/av-arch/jctvc-site/bitstream_exchange/draft_conformance/HEVC_v1/
>
> Best regards,
> Nathan Hebert