linux-kernel - Re: [PATCH RESEND v2 3/8] drm/vkms: Add support for ARGB16161616 formats

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Message-ID: <Zx9ebwyYnUDs7a-A@fedora>
Date: Mon, 28 Oct 2024 10:50:39 +0100
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Maíra Canal <mairacanal@...eup.net>
Cc: Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>,
	Melissa Wen <melissa.srw@...il.com>,
	Haneen Mohammed <hamohammed.sa@...il.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Simona Vetter <simona.vetter@...ll.ch>,
	dri-devel@...ts.freedesktop.org, arthurgrillo@...eup.net,
	linux-kernel@...r.kernel.org, jeremie.dautheribes@...tlin.com,
	miquel.raynal@...tlin.com, thomas.petazzoni@...tlin.com,
	seanpaul@...gle.com, marcheu@...gle.com, nicolejadeyee@...gle.com,
	20241007-yuv-v12-0-01c1ada6fec8@...tlin.com
Subject: Re: [PATCH RESEND v2 3/8] drm/vkms: Add support for ARGB16161616
 formats

On 26/10/24 - 11:15, Maíra Canal wrote:
> Hi Louis,
> 
> On 07/10/24 13:46, Louis Chauvet wrote:
> > The formats XRGB16161616 and ARGB16161616 were already supported.
> > Add the support for:
> > - ABGR16161616
> > - XBGR16161616
> > 
> > Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
> > ---
> >   drivers/gpu/drm/vkms/vkms_formats.c | 11 ++++++++---
> >   drivers/gpu/drm/vkms/vkms_plane.c   |  2 ++
> >   2 files changed, 10 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkms_formats.c
> > index b5a38f70c62b..c03a481f5005 100644
> > --- a/drivers/gpu/drm/vkms/vkms_formats.c
> > +++ b/drivers/gpu/drm/vkms/vkms_formats.c
> > @@ -441,9 +441,10 @@ READ_LINE_ARGB8888(ABGR8888_read_line, px, px[3], px[0], px[1], px[2])
> >   READ_LINE_ARGB8888(RGBA8888_read_line, px, px[0], px[3], px[2], px[1])
> >   READ_LINE_ARGB8888(BGRA8888_read_line, px, px[0], px[1], px[2], px[3])
> > -
> > -READ_LINE_16161616(ARGB16161616_read_line, px, px[3], px[2], px[1], px[0]);
> > -READ_LINE_16161616(XRGB16161616_read_line, px, 0xFFFF, px[2], px[1], px[0]);
> 
> Please, correct the error in the patch that introduced. Don't fix it in
> an unrelated patch.

Thanks! 
 
> > +READ_LINE_16161616(ARGB16161616_read_line, px, px[3], px[2], px[1], px[0])
> > +READ_LINE_16161616(ABGR16161616_read_line, px, px[3], px[0], px[1], px[2])
> > +READ_LINE_16161616(XRGB16161616_read_line, px, 0xFFFF, px[2], px[1], px[0])
> 
> Please, be consistent in the use of decimal numbers and hexadecimal
> number. If you prefer to use hexadecimal, don't use 255, use 0xFF.

I will change everything to hexadecimal for the v2.
 
> > +READ_LINE_16161616(XBGR16161616_read_line, px, 0xFFFF, px[0], px[1], px[2])
> 
> Are you using tests to check the new formats?

I need to check which ones, but I think yes.

Thanks,
Louis Chauvet

> Best Regards,
> - Maíra
> 
> >   READ_LINE(RGB565_read_line, px, __le16, argb_u16_from_RGB565, px)
> > @@ -659,8 +660,12 @@ pixel_read_line_t get_pixel_read_line_function(u32 format)
> >   		return &BGRX8888_read_line;
> >   	case DRM_FORMAT_ARGB16161616:
> >   		return &ARGB16161616_read_line;
> > +	case DRM_FORMAT_ABGR16161616:
> > +		return &ABGR16161616_read_line;
> >   	case DRM_FORMAT_XRGB16161616:
> >   		return &XRGB16161616_read_line;
> > +	case DRM_FORMAT_XBGR16161616:
> > +		return &XBGR16161616_read_line;
> >   	case DRM_FORMAT_RGB565:
> >   		return &RGB565_read_line;
> >   	case DRM_FORMAT_NV12:
> > diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
> > index 941a6e92a040..1e971c7760d9 100644
> > --- a/drivers/gpu/drm/vkms/vkms_plane.c
> > +++ b/drivers/gpu/drm/vkms/vkms_plane.c
> > @@ -22,7 +22,9 @@ static const u32 vkms_formats[] = {
> >   	DRM_FORMAT_RGBX8888,
> >   	DRM_FORMAT_BGRX8888,
> >   	DRM_FORMAT_XRGB16161616,
> > +	DRM_FORMAT_XBGR16161616,
> >   	DRM_FORMAT_ARGB16161616,
> > +	DRM_FORMAT_ABGR16161616,
> >   	DRM_FORMAT_RGB565,
> >   	DRM_FORMAT_NV12,
> >   	DRM_FORMAT_NV16,
> >