linux-kernel - Re: [PATCH v2 1/3] drm: Add some new format DRM_FORMAT_NVXX

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Message-ID: <17879396.dXe580Ps6o@diego>
Date:   Fri, 08 Nov 2019 16:08:50 +0100
From:   Heiko Stübner <heiko@...ech.de>
To:     Daniel Vetter <daniel@...ll.ch>
Cc:     Sandy Huang <hjc@...k-chips.com>, 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>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] drm: Add some new format DRM_FORMAT_NVXX_10

Hi Daniel, Sandy,

Am Mittwoch, 9. Oktober 2019, 16:50:08 CET schrieb Daniel Vetter:
> 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,
> 
> Yup this is what I had in mind with using the block stuff to describe your
> new 10bit yuv formats. Thanks for respining.
> 
> Once we've nailed the exact bit description of the format precisely this
> can be merged imo.

I just saw this series still sitting in my inbox, so was wondering about the
"once we've nailed the exact bit description..." and what is missing for that.

Thanks
Heiko


> > 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
> > + */
> > +#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
> 
>