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Message-ID: <a5fa3d8e-9e8e-8aa8-8abb-f00e8357acb5@rock-chips.com>
Date: Tue, 8 Oct 2019 19:49:33 +0800
From: "sandy.huang" <hjc@...k-chips.com>
To: Ville Syrjälä <ville.syrjala@...ux.intel.com>
Cc: dri-devel@...ts.freedesktop.org,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <maxime.ripard@...tlin.com>,
Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] drm: Add some new format DRM_FORMAT_NVXX_10
在 2019/10/8 下午7:33, Ville Syrjälä 写道:
> On Tue, Oct 08, 2019 at 10:40:20AM +0800, sandy.huang wrote:
>> Hi ville syrjala,
>>
>> 在 2019/9/30 下午6:48, Ville Syrjälä 写道:
>>> On Thu, Sep 26, 2019 at 04:24:47PM +0800, Sandy Huang wrote:
>>>> These new format is supported by some rockchip socs:
>>>>
>>>> DRM_FORMAT_NV12_10/DRM_FORMAT_NV21_10
>>>> DRM_FORMAT_NV16_10/DRM_FORMAT_NV61_10
>>>> DRM_FORMAT_NV24_10/DRM_FORMAT_NV42_10
>>>>
>>>> Signed-off-by: Sandy Huang <hjc@...k-chips.com>
>>>> ---
>>>> drivers/gpu/drm/drm_fourcc.c | 18 ++++++++++++++++++
>>>> include/uapi/drm/drm_fourcc.h | 14 ++++++++++++++
>>>> 2 files changed, 32 insertions(+)
>>>>
>>>> diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
>>>> index c630064..ccd78a3 100644
>>>> --- a/drivers/gpu/drm/drm_fourcc.c
>>>> +++ b/drivers/gpu/drm/drm_fourcc.c
>>>> @@ -261,6 +261,24 @@ const struct drm_format_info *__drm_format_info(u32 format)
>>>> { .format = DRM_FORMAT_P016, .depth = 0, .num_planes = 2,
>>>> .char_per_block = { 2, 4, 0 }, .block_w = { 1, 0, 0 }, .block_h = { 1, 0, 0 },
>>>> .hsub = 2, .vsub = 2, .is_yuv = true},
>>>> + { .format = DRM_FORMAT_NV12_10, .depth = 0, .num_planes = 2,
>>>> + .char_per_block = { 5, 10, 0 }, .block_w = { 4, 4, 0 }, .block_h = { 4, 4, 0 },
>>>> + .hsub = 2, .vsub = 2, .is_yuv = true},
>>>> + { .format = DRM_FORMAT_NV21_10, .depth = 0, .num_planes = 2,
>>>> + .char_per_block = { 5, 10, 0 }, .block_w = { 4, 4, 0 }, .block_h = { 4, 4, 0 },
>>>> + .hsub = 2, .vsub = 2, .is_yuv = true},
>>>> + { .format = DRM_FORMAT_NV16_10, .depth = 0, .num_planes = 2,
>>>> + .char_per_block = { 5, 10, 0 }, .block_w = { 4, 4, 0 }, .block_h = { 4, 4, 0 },
>>>> + .hsub = 2, .vsub = 1, .is_yuv = true},
>>>> + { .format = DRM_FORMAT_NV61_10, .depth = 0, .num_planes = 2,
>>>> + .char_per_block = { 5, 10, 0 }, .block_w = { 4, 4, 0 }, .block_h = { 4, 4, 0 },
>>>> + .hsub = 2, .vsub = 1, .is_yuv = true},
>>>> + { .format = DRM_FORMAT_NV24_10, .depth = 0, .num_planes = 2,
>>>> + .char_per_block = { 5, 10, 0 }, .block_w = { 4, 4, 0 }, .block_h = { 4, 4, 0 },
>>>> + .hsub = 1, .vsub = 1, .is_yuv = true},
>>>> + { .format = DRM_FORMAT_NV42_10, .depth = 0, .num_planes = 2,
>>>> + .char_per_block = { 5, 10, 0 }, .block_w = { 4, 4, 0 }, .block_h = { 4, 4, 0 },
>>>> + .hsub = 1, .vsub = 1, .is_yuv = true},
>>>> { .format = DRM_FORMAT_P210, .depth = 0,
>>>> .num_planes = 2, .char_per_block = { 2, 4, 0 },
>>>> .block_w = { 1, 0, 0 }, .block_h = { 1, 0, 0 }, .hsub = 2,
>>>> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
>>>> index 3feeaa3..08e2221 100644
>>>> --- a/include/uapi/drm/drm_fourcc.h
>>>> +++ b/include/uapi/drm/drm_fourcc.h
>>>> @@ -238,6 +238,20 @@ extern "C" {
>>>> #define DRM_FORMAT_NV42 fourcc_code('N', 'V', '4', '2') /* non-subsampled Cb:Cr plane */
>>>>
>>>> /*
>>>> + * 2 plane YCbCr
>>>> + * index 0 = Y plane, Y3:Y2:Y1:Y0 10:10:10:10
>>>> + * index 1 = Cb:Cr plane, Cb3:Cr3:Cb2:Cr2:Cb1:Cr1:Cb0:Cr0 10:10:10:10:10:10:10:10
>>>> + * or
>>>> + * index 1 = Cr:Cb plane, Cr3:Cb3:Cr2:Cb2:Cr1:Cb1:Cr0:Cb0 10:10:10:10:10:10:10:10
>>> So now you're defining it as some kind of byte aligned block.
>>> With that specifying endianness would now make sense since
>>> otherwise this tells us absolutely nothing about the memory
>>> layout.
>>>
>>> So I'd either do that, or go back to not specifying anything and
>>> use some weasel words like "mamory layout is implementation defined"
>>> which of course means no one can use it for anything that involves
>>> any kind of cross vendor stuff.
>> /*
>> * 2 plane YCbCr
>> * index 0 = Y plane, [39: 0] Y3:Y2:Y1:Y0 10:10:10:10 little endian
>> * index 1 = Cb:Cr plane, [79: 0] Cb3:Cr3:Cb2:Cr2:Cb1:Cr1:Cb0:Cr0
>> 10:10:10:10:10:10:10:10 little endian
>> * or
>> * index 1 = Cr:Cb plane, [79: 0] Cr3:Cb3:Cr2:Cb2:Cr1:Cb1:Cr0:Cb0
>> 10:10:10:10:10:10:10:10 little endian
>> */
>>
>> Is this description ok?
> Seems OK to me, if it actually describes the format correctly.
>
> Though I'm not sure why the CbCr is defines as an 80bit block
> and Y has a 40bit block. 40bits should be enough for CbCr as well.
>
well, this is taken into account yuv444, 4 y point corresponding with 4
uv point.
if only describes the layout memory, here can change to 40bit block.
thanks.
>>>> + */
>>>> +#define DRM_FORMAT_NV12_10 fourcc_code('N', 'A', '1', '2') /* 2x2 subsampled Cr:Cb plane */
>>>> +#define DRM_FORMAT_NV21_10 fourcc_code('N', 'A', '2', '1') /* 2x2 subsampled Cb:Cr plane */
>>>> +#define DRM_FORMAT_NV16_10 fourcc_code('N', 'A', '1', '6') /* 2x1 subsampled Cr:Cb plane */
>>>> +#define DRM_FORMAT_NV61_10 fourcc_code('N', 'A', '6', '1') /* 2x1 subsampled Cb:Cr plane */
>>>> +#define DRM_FORMAT_NV24_10 fourcc_code('N', 'A', '2', '4') /* non-subsampled Cr:Cb plane */
>>>> +#define DRM_FORMAT_NV42_10 fourcc_code('N', 'A', '4', '2') /* non-subsampled Cb:Cr plane */
>>>> +
>>>> +/*
>>>> * 2 plane YCbCr MSB aligned
>>>> * index 0 = Y plane, [15:0] Y:x [10:6] little endian
>>>> * index 1 = Cr:Cb plane, [31:0] Cr:x:Cb:x [10:6:10:6] little endian
>>>> --
>>>> 2.7.4
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> dri-devel mailing list
>>>> dri-devel@...ts.freedesktop.org
>>>> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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