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Date:   Fri, 8 Feb 2019 16:51:07 +0100
From:   Daniel Vetter <daniel@ffwll.ch>
To:     Neil Armstrong <narmstrong@baylibre.com>
Cc:     Ayan Halder <Ayan.Halder@arm.com>, Randy Li <ayaka@soulik.info>,
        "airlied@linux.ie" <airlied@linux.ie>,
        Daniel Vetter <daniel.vetter@ffwll.ch>, nd <nd@arm.com>,
        "mchehab+samsung@kernel.org" <mchehab+samsung@kernel.org>,
        "maxime.ripard@bootlin.com" <maxime.ripard@bootlin.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>,
        "sakari.ailus@iki.fi" <sakari.ailus@iki.fi>,
        "laurent.pinchart@ideasonboard.com" 
        <laurent.pinchart@ideasonboard.com>,
        "mikhail.v.gavrilov@gmail.com" <mikhail.v.gavrilov@gmail.com>,
        "mchehab@kernel.org" <mchehab@kernel.org>,
        "sean@poorly.run" <sean@poorly.run>,
        "linux-media@vger.kernel.org" <linux-media@vger.kernel.org>
Subject: Re: [PATCH v10 1/2] drm/fourcc: Add new P010, P016 video format
Message-ID: <20190208155107.GN23159@phenom.ffwll.local>
Mail-Followup-To: Neil Armstrong <narmstrong@baylibre.com>,
        Ayan Halder <Ayan.Halder@arm.com>, Randy Li <ayaka@soulik.info>,
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        "mchehab+samsung@kernel.org" <mchehab+samsung@kernel.org>,
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        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>,
        "sakari.ailus@iki.fi" <sakari.ailus@iki.fi>,
        "laurent.pinchart@ideasonboard.com" <laurent.pinchart@ideasonboard.com>,
        "mikhail.v.gavrilov@gmail.com" <mikhail.v.gavrilov@gmail.com>,
        "mchehab@kernel.org" <mchehab@kernel.org>,
        "sean@poorly.run" <sean@poorly.run>,
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References: <20190109195710.28501-1-ayaka@soulik.info>
 <20190109195710.28501-2-ayaka@soulik.info>
 <20190114163645.GA16349@arm.com>
 <81f3b266-10d4-f230-c59b-79931e2e3188@baylibre.com>
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On Thu, Feb 07, 2019 at 10:44:10AM +0100, Neil Armstrong wrote:
> Hi,
> 
> On 14/01/2019 17:36, Ayan Halder wrote:
> > On Thu, Jan 10, 2019 at 03:57:09AM +0800, Randy Li wrote:
> >> P010 is a planar 4:2:0 YUV with interleaved UV plane, 10 bits per
> >> channel video format.
> >>
> >> P012 is a planar 4:2:0 YUV 12 bits per channel
> >>
> >> P016 is a planar 4:2:0 YUV with interleaved UV plane, 16 bits per
> >> channel video format.
> >>
> >> V3: Added P012 and fixed cpp for P010.
> >> V4: format definition refined per review.
> >> V5: Format comment block for each new pixel format.
> >> V6: reversed Cb/Cr order in comments.
> >> v7: reversed Cb/Cr order in comments of header files, remove
> >> the wrong part of commit message.
> >> V8: reversed V7 changes except commit message and rebased.
> >> v9: used the new properties to describe those format and
> >> rebased.
> >>
> >> Cc: Daniel Stone <daniel@fooishbar.org>
> >> Cc: Ville Syrj??l?? <ville.syrjala@linux.intel.com>
> >>
> >> Signed-off-by: Randy Li <ayaka@soulik.info>
> >> Signed-off-by: Clint Taylor <clinton.a.taylor@intel.com>
> >> ---
> >>  drivers/gpu/drm/drm_fourcc.c  |  9 +++++++++
> >>  include/uapi/drm/drm_fourcc.h | 21 +++++++++++++++++++++
> >>  2 files changed, 30 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
> >> index d90ee03a84c6..ba7e19d4336c 100644
> >> --- a/drivers/gpu/drm/drm_fourcc.c
> >> +++ b/drivers/gpu/drm/drm_fourcc.c
> >> @@ -238,6 +238,15 @@ const struct drm_format_info *__drm_format_info(u32 format)
> >>  		{ .format = DRM_FORMAT_X0L2,		.depth = 0,  .num_planes = 1,
> >>  		  .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 },
> >>  		  .hsub = 2, .vsub = 2, .is_yuv = true },
> >> +		{ .format = DRM_FORMAT_P010,            .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_P012,		.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_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},
> >>  	};
> >>  
> >>  	unsigned int i;
> >> diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> >> index 0b44260a5ee9..8dd1328bc8d6 100644
> >> --- a/include/uapi/drm/drm_fourcc.h
> >> +++ b/include/uapi/drm/drm_fourcc.h
> >> @@ -195,6 +195,27 @@ extern "C" {
> >>  #define DRM_FORMAT_NV24		fourcc_code('N', 'V', '2', '4') /* non-subsampled Cr:Cb plane */
> >>  #define DRM_FORMAT_NV42		fourcc_code('N', 'V', '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
> >> + */
> >> +#define DRM_FORMAT_P010		fourcc_code('P', '0', '1', '0') /* 2x2 subsampled Cr:Cb plane 10 bits per channel */
> >> +
> >> +/*
> >> + * 2 plane YCbCr MSB aligned
> >> + * index 0 = Y plane, [15:0] Y:x [12:4] little endian
> >> + * index 1 = Cr:Cb plane, [31:0] Cr:x:Cb:x [12:4:12:4] little endian
> >> + */
> >> +#define DRM_FORMAT_P012		fourcc_code('P', '0', '1', '2') /* 2x2 subsampled Cr:Cb plane 12 bits per channel */
> >> +
> >> +/*
> >> + * 2 plane YCbCr MSB aligned
> >> + * index 0 = Y plane, [15:0] Y little endian
> >> + * index 1 = Cr:Cb plane, [31:0] Cr:Cb [16:16] little endian
> >> + */
> >> +#define DRM_FORMAT_P016		fourcc_code('P', '0', '1', '6') /* 2x2 subsampled Cr:Cb plane 16 bits per channel */
> >> +
> > 
> > looks good to me.
> > Reviewed by:- Ayan Kumar Halder <ayan.halder@arm.com>
> > 
> > We are using P010 format for our mali display driver. Our AFBC patch
> > series(https://patchwork.freedesktop.org/series/53395/) is dependent
> > on this patch. So, that's why I wanted to know when you are planning to
> > merge this. As far as I remember, Juha wanted to implement some igt
> > tests
> > (https://lists.freedesktop.org/archives/intel-gfx/2018-September/174877.html)
> > , so is that done now?
> > 
> > My apologies if I am pushing hard on this.
> 
> Looks good to me aswell,
> 
> Reviewed by: Neil Armstrong <narmstrong@baylibre.com>
> 
> Seems we will also need P010 to support the Amlogic Compressed modifier to display
> compressed frames from the HW decoder.
> 
> I can apply this to drm-misc-next if everyone is ok

Matches what's still flaoting around by intel devs:

https://patchwork.freedesktop.org/patch/284801/

Except this one uses the new block descriptors and has much neater
comments.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Please push to drm-misc-next asap so intel folks aren't blocked.

Thanks, Daniel

> 
> Neil
> 
> >>  /*
> >>   * 3 plane YCbCr
> >>   * index 0: Y plane, [7:0] Y
> >> -- 
> >> 2.20.1
> >>
> >> _______________________________________________
> >> dri-devel mailing list
> >> dri-devel@lists.freedesktop.org
> >> https://lists.freedesktop.org/mailman/listinfo/dri-devel
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
> > 
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch