Re: [PATCH] media: hantro: Be more accurate on pixel formats step_width constraints

[Benjamin Gaignard <benjamin.gaignard@collabora.com>]

Le 16/05/2022 à 21:08, Nicolas Dufresne a écrit :
> Hi Benjamin,
>
> thanks for your patch, but see below, perhaps something you could improve...
>
> Le lundi 16 mai 2022 à 16:11 +0200, Benjamin Gaignard a écrit :
>> On Hantro G2 decoder on IMX8MQ strides requirements aren't the same
>> for NV12_4L4 and NV12 pixel formats. The first one use a 4 bytes padding
>> while the last one needs 8 bytes.
>> To be sure to provide the correct stride in all cases we need:
>> - to relax the constraints on codec formats so set step_width to 4
>> - use capture queue format and not the output queue format when applying
>>    the pixel format constraints.
>> - put the correct step_width constraints on each pixel format.
>  From v4l2_apply_frmsize_constraints() point of view, 8 bytes is a sub-set of 4
> bytes. The application can request larger then coded size width/height after
> this change and you'd still get a broken render. The reason is that it looks
> like the tile mode has more constraints then what
> v4l2_apply_frmsize_constraints(). It seems like from your description that the
> width/height must match the coded size (+plus the alignment). For this reason, I
> think you need when using tile mode validate the that the width/height passed to
> v4l2_apply_frmsize_constraints() matched the coded size from the header
> structure rather then user provided size passed in S_FMT.

Gstreamer plugins set and get pixel formats on capture and output queues without
sending a header when they want to test the driver before register the decoder
element. If I do want you want that will be broken and not only for HEVC but for
all other codecs.

Benjamin

>
> regards,
> Nicolas
>
>> With this SAODBLK_A_MainConcept_4 and SAODBLK_B_MainConcept_4 conformance
>> tests files are correctly decoded with both NV12 and NV12_4L4 pixel formats.
>> These two files have a resolution of 1016x760.
>> If step_width = 16 for the both pixel formats the selected capture
>> resolution is 1024x768 which is wrong for NV12_4L4 (which expect 1016x760)
>> on Hantro G2 on IMX8MQ (but correct for NV12).
>>
>> For other variants than Hantro G2 on IMX8M keep the same step_width to avoid
>> regressions.
>>
>> Fluster HEVC test score is now 128/147 vs 126/147 with the both pixel
>> formats as decoder output.
>> Fluster VP9 test score stay at 147/303.
>>
>> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
>> ---
>>   drivers/staging/media/hantro/hantro_v4l2.c    |  2 +-
>>   drivers/staging/media/hantro/imx8m_vpu_hw.c   | 40 +++++++++++++++++--
>>   .../staging/media/hantro/rockchip_vpu_hw.c    | 32 +++++++++++++++
>>   .../staging/media/hantro/sama5d4_vdec_hw.c    | 16 ++++++++
>>   drivers/staging/media/hantro/sunxi_vpu_hw.c   | 16 ++++++++
>>   5 files changed, 101 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/staging/media/hantro/hantro_v4l2.c b/drivers/staging/media/hantro/hantro_v4l2.c
>> index 71a6279750bf..93d0dcf69f4a 100644
>> --- a/drivers/staging/media/hantro/hantro_v4l2.c
>> +++ b/drivers/staging/media/hantro/hantro_v4l2.c
>> @@ -260,7 +260,7 @@ static int hantro_try_fmt(const struct hantro_ctx *ctx,
>>   	} else if (ctx->is_encoder) {
>>   		vpu_fmt = ctx->vpu_dst_fmt;
>>   	} else {
>> -		vpu_fmt = ctx->vpu_src_fmt;
>> +		vpu_fmt = fmt;
>>   		/*
>>   		 * Width/height on the CAPTURE end of a decoder are ignored and
>>   		 * replaced by the OUTPUT ones.
>> diff --git a/drivers/staging/media/hantro/imx8m_vpu_hw.c b/drivers/staging/media/hantro/imx8m_vpu_hw.c
>> index 9802508bade2..b6b2bf65e56d 100644
>> --- a/drivers/staging/media/hantro/imx8m_vpu_hw.c
>> +++ b/drivers/staging/media/hantro/imx8m_vpu_hw.c
>> @@ -83,6 +83,14 @@ static const struct hantro_fmt imx8m_vpu_postproc_fmts[] = {
>>   		.fourcc = V4L2_PIX_FMT_YUYV,
>>   		.codec_mode = HANTRO_MODE_NONE,
>>   		.postprocessed = true,
>> +		.frmsize = {
>> +			.min_width = 48,
>> +			.max_width = 3840,
>> +			.step_width = MB_DIM,
>> +			.min_height = 48,
>> +			.max_height = 2160,
>> +			.step_height = MB_DIM,
>> +		},
>>   	},
>>   };
>>   
>> @@ -90,6 +98,14 @@ static const struct hantro_fmt imx8m_vpu_dec_fmts[] = {
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_NV12,
>>   		.codec_mode = HANTRO_MODE_NONE,
>> +		.frmsize = {
>> +			.min_width = 48,
>> +			.max_width = 3840,
>> +			.step_width = MB_DIM,
>> +			.min_height = 48,
>> +			.max_height = 2160,
>> +			.step_height = MB_DIM,
>> +		},
>>   	},
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_MPEG2_SLICE,
>> @@ -137,6 +153,14 @@ static const struct hantro_fmt imx8m_vpu_g2_postproc_fmts[] = {
>>   		.fourcc = V4L2_PIX_FMT_NV12,
>>   		.codec_mode = HANTRO_MODE_NONE,
>>   		.postprocessed = true,
>> +		.frmsize = {
>> +			.min_width = 48,
>> +			.max_width = 3840,
>> +			.step_width = MB_DIM,
>> +			.min_height = 48,
>> +			.max_height = 2160,
>> +			.step_height = MB_DIM,
>> +		},
>>   	},
>>   };
>>   
>> @@ -144,6 +168,14 @@ static const struct hantro_fmt imx8m_vpu_g2_dec_fmts[] = {
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_NV12_4L4,
>>   		.codec_mode = HANTRO_MODE_NONE,
>> +		.frmsize = {
>> +			.min_width = 48,
>> +			.max_width = 3840,
>> +			.step_width = 4,
>> +			.min_height = 48,
>> +			.max_height = 2160,
>> +			.step_height = 4,
>> +		},
>>   	},
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_HEVC_SLICE,
>> @@ -152,10 +184,10 @@ static const struct hantro_fmt imx8m_vpu_g2_dec_fmts[] = {
>>   		.frmsize = {
>>   			.min_width = 48,
>>   			.max_width = 3840,
>> -			.step_width = MB_DIM,
>> +			.step_width = 4,
>>   			.min_height = 48,
>>   			.max_height = 2160,
>> -			.step_height = MB_DIM,
>> +			.step_height = 4,
>>   		},
>>   	},
>>   	{
>> @@ -165,10 +197,10 @@ static const struct hantro_fmt imx8m_vpu_g2_dec_fmts[] = {
>>   		.frmsize = {
>>   			.min_width = 48,
>>   			.max_width = 3840,
>> -			.step_width = MB_DIM,
>> +			.step_width = 4,
>>   			.min_height = 48,
>>   			.max_height = 2160,
>> -			.step_height = MB_DIM,
>> +			.step_height = 4,
>>   		},
>>   	},
>>   };
>> diff --git a/drivers/staging/media/hantro/rockchip_vpu_hw.c b/drivers/staging/media/hantro/rockchip_vpu_hw.c
>> index fc96501f3bc8..efba7fcdf207 100644
>> --- a/drivers/staging/media/hantro/rockchip_vpu_hw.c
>> +++ b/drivers/staging/media/hantro/rockchip_vpu_hw.c
>> @@ -63,6 +63,14 @@ static const struct hantro_fmt rockchip_vpu1_postproc_fmts[] = {
>>   		.fourcc = V4L2_PIX_FMT_YUYV,
>>   		.codec_mode = HANTRO_MODE_NONE,
>>   		.postprocessed = true,
>> +		.frmsize = {
>> +			.min_width = 48,
>> +			.max_width = 1920,
>> +			.step_width = MB_DIM,
>> +			.min_height = 48,
>> +			.max_height = 1088,
>> +			.step_height = MB_DIM,
>> +		},
>>   	},
>>   };
>>   
>> @@ -70,6 +78,14 @@ static const struct hantro_fmt rk3066_vpu_dec_fmts[] = {
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_NV12,
>>   		.codec_mode = HANTRO_MODE_NONE,
>> +		.frmsize = {
>> +			.min_width = 48,
>> +			.max_width = 1920,
>> +			.step_width = MB_DIM,
>> +			.min_height = 48,
>> +			.max_height = 1088,
>> +			.step_height = MB_DIM,
>> +		},
>>   	},
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_H264_SLICE,
>> @@ -116,6 +132,14 @@ static const struct hantro_fmt rk3288_vpu_dec_fmts[] = {
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_NV12,
>>   		.codec_mode = HANTRO_MODE_NONE,
>> +		.frmsize = {
>> +			.min_width = 48,
>> +			.max_width = 4096,
>> +			.step_width = MB_DIM,
>> +			.min_height = 48,
>> +			.max_height = 2304,
>> +			.step_height = MB_DIM,
>> +		},
>>   	},
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_H264_SLICE,
>> @@ -162,6 +186,14 @@ static const struct hantro_fmt rk3399_vpu_dec_fmts[] = {
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_NV12,
>>   		.codec_mode = HANTRO_MODE_NONE,
>> +		.frmsize = {
>> +			.min_width = 48,
>> +			.max_width = 1920,
>> +			.step_width = MB_DIM,
>> +			.min_height = 48,
>> +			.max_height = 1088,
>> +			.step_height = MB_DIM,
>> +		},
>>   	},
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_H264_SLICE,
>> diff --git a/drivers/staging/media/hantro/sama5d4_vdec_hw.c b/drivers/staging/media/hantro/sama5d4_vdec_hw.c
>> index b2fc1c5613e1..07ee804e706b 100644
>> --- a/drivers/staging/media/hantro/sama5d4_vdec_hw.c
>> +++ b/drivers/staging/media/hantro/sama5d4_vdec_hw.c
>> @@ -16,6 +16,14 @@ static const struct hantro_fmt sama5d4_vdec_postproc_fmts[] = {
>>   		.fourcc = V4L2_PIX_FMT_YUYV,
>>   		.codec_mode = HANTRO_MODE_NONE,
>>   		.postprocessed = true,
>> +		.frmsize = {
>> +			.min_width = 48,
>> +			.max_width = 1280,
>> +			.step_width = MB_DIM,
>> +			.min_height = 48,
>> +			.max_height = 720,
>> +			.step_height = MB_DIM,
>> +		},
>>   	},
>>   };
>>   
>> @@ -23,6 +31,14 @@ static const struct hantro_fmt sama5d4_vdec_fmts[] = {
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_NV12,
>>   		.codec_mode = HANTRO_MODE_NONE,
>> +		.frmsize = {
>> +			.min_width = 48,
>> +			.max_width = 1280,
>> +			.step_width = MB_DIM,
>> +			.min_height = 48,
>> +			.max_height = 720,
>> +			.step_height = MB_DIM,
>> +		},
>>   	},
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_MPEG2_SLICE,
>> diff --git a/drivers/staging/media/hantro/sunxi_vpu_hw.c b/drivers/staging/media/hantro/sunxi_vpu_hw.c
>> index c0edd5856a0c..c2392c08febb 100644
>> --- a/drivers/staging/media/hantro/sunxi_vpu_hw.c
>> +++ b/drivers/staging/media/hantro/sunxi_vpu_hw.c
>> @@ -14,6 +14,14 @@ static const struct hantro_fmt sunxi_vpu_postproc_fmts[] = {
>>   		.fourcc = V4L2_PIX_FMT_NV12,
>>   		.codec_mode = HANTRO_MODE_NONE,
>>   		.postprocessed = true,
>> +		.frmsize = {
>> +			.min_width = 48,
>> +			.max_width = 3840,
>> +			.step_width = 32,
>> +			.min_height = 48,
>> +			.max_height = 2160,
>> +			.step_height = 32,
>> +		},
>>   	},
>>   };
>>   
>> @@ -21,6 +29,14 @@ static const struct hantro_fmt sunxi_vpu_dec_fmts[] = {
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_NV12_4L4,
>>   		.codec_mode = HANTRO_MODE_NONE,
>> +		.frmsize = {
>> +			.min_width = 48,
>> +			.max_width = 3840,
>> +			.step_width = 32,
>> +			.min_height = 48,
>> +			.max_height = 2160,
>> +			.step_height = 32,
>> +		},
>>   	},
>>   	{
>>   		.fourcc = V4L2_PIX_FMT_VP9_FRAME,